All 167 questions
How do you choose between a monolith and microservices, and when is migration worthwhile?
Asked in 17 of 942 interviews · last asked Oct 16 · Design · Senior
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I would start with a modular monolith unless there is a clear need for separate services. Microservices help when teams need independent releases or parts need different scaling, but add network and operational complexity. Migration is worthwhile when these benefits outweigh the cost and the team can run distributed systems reliably.
- Base the choice on business needs, team size, domain boundaries, and operational skills.
- A modular monolith keeps clear internal boundaries while remaining one deployable application.
- Microservices add network failures, cross-service data consistency problems, and monitoring work.
- Migrate one well-defined part at a time, with measurable goals; avoid a full rewrite.
What the interviewer checks: The interviewer checks whether you can balance business needs, team capacity, and distributed-system costs without following trends.
Other ways it was asked
- “How would you decide how to split a monolith into microservices?”
- “When would you choose microservices over a monolith, and when would you not?”
- “When starting a project, how would you choose between a modular monolith and microservices?”
How do microservices communicate with each other?
Asked in 9 of 942 interviews · last asked Oct 23 · Concept · Mid-level
Show answer
Microservices communicate through direct requests or asynchronous messages. Direct calls use HTTP APIs, often REST, or gRPC when the caller needs a response. Messages go through a broker or event platform, such as RabbitMQ or Kafka, so services can work independently. For example, an order service publishes an event that a shipping service processes later.
- Synchronous calls are simple, but the caller depends on the other service being available.
- Asynchronous messages support buffering and retries, but processing may be delayed.
- Use timeouts for direct calls and handle duplicate messages safely.
What the interviewer checks: The interviewer checks whether you can explain both communication styles and choose between them based on response needs and failure handling.
Common mistake (in 4 of 5 reviewed answers): Many answers forget that services can communicate asynchronously through message brokers or event platforms, not just HTTP calls.
Other ways it was asked
- “What are the ways microservices can communicate with each other?”
- “How do microservices communicate with each other? Can you give an example?”
- “How does communication between two microservices happen?”
How do you design and build microservices?
Asked in 6 of 942 interviews · last asked Sep 25 · Design · Mid-level
Show answer
I split the system by business responsibility, with each service owning its data and deploying independently. I define clear API or event contracts and choose synchronous or asynchronous communication based on the workflow. I add automated tests, deployment pipelines, monitoring, and failure handling. I use microservices only when independent scaling or team ownership justifies the extra complexity.
- Choose boundaries around business capabilities, not technical layers; avoid services that constantly call each other.
- Avoid shared database tables; use local transactions and patterns like sagas for workflows across services.
- Use timeouts, bounded retries, and circuit breakers; make retried operations idempotent.
- Secure service access, collect logs, metrics, and traces, and scale services based on measured bottlenecks.
What the interviewer checks: The interviewer checks whether you can define service boundaries and manage the data, failure, and operational costs.
Other ways it was asked
- “What are the key considerations when designing a microservices architecture?”
- “What are some key factors to consider when designing scalable microservices?”
- “How do you design and implement microservices?”
Why would you choose microservices, and what benefits do they offer beyond scalability?
Asked in 4 of 942 interviews · last asked Oct 7 · Concept · Senior
Show answer
I would choose microservices when separate teams need to build and release parts of a system independently. Services can also isolate failures and use different tools for different workloads. These benefits must justify harder operations, network failures, and keeping data consistent across services.
- Clear service boundaries let teams own and deploy services independently.
- Fault isolation needs timeouts and other safeguards; splitting services alone does not prevent cascading failures.
- Each service can use a language, database, or compute setup suited to its workload.
- A simpler monolith may be better when independent releases and team ownership offer little value.
What the interviewer checks: The interviewer is checking whether you can connect microservices to real needs and explain their costs beyond scaling.
Other ways it was asked
- “What are the advantages of microservices?”
- “Why do we go for microservices?”
- “What benefits can justify the trade-offs of a microservices architecture?”
How would you design and implement a microservices architecture integrated with Kafka?
Asked once · last asked Sep 23 · Design · Senior
Other ways it was asked
- “What microservices architecture would you choose for a system integrated with Kafka?”
How would you integrate an enterprise financial system with Office 365?
Asked once · last asked Oct 8 · Design · Senior
Other ways it was asked
- “How would you integrate an enterprise financial system with Office 365 so that actions in one system are correctly performed in the other?”
- “What challenges can arise when integrating an enterprise financial system with Office 365 so that actions are correctly performed in both systems, and how would you address them?”
How does a point-of-sale transaction flow from the register to the server?
Asked once · last asked Jun 8 · Design · Mid-level
Other ways it was asked
- “How does the database fit into the flow of a point-of-sale transaction from the register to the server?”
How would you integrate real-time FedEx shipping calculations into the Salesforce B2B Commerce checkout process?
Asked once · last asked Sep 21 · Design · Senior
Other ways it was asked
- “How would you integrate real-time shipping calculations into the Salesforce B2B Commerce checkout process?”
What are common integration patterns, and when would you use each?
Asked once · last asked Oct 1 · Concept · Senior
How would you migrate a legacy application to Spring Boot?
Asked once · last asked Oct 16 · Scenario · Senior
Given a monolithic application that takes orders, checks inventory, and generates reports, what would be your first step in migrating it to microservices, and how would you proceed?
Asked once · last asked Jan 30 · Design · Senior
How should three microservices with separate databases communicate to retrieve and share data?
Asked once · last asked Jan 31 · Design · Senior
What are the differences between monolithic systems, microservices, and REST APIs in a Java and Spring Boot backend?
Asked once · last asked Feb 6 · Concept · Senior
How would you develop integrations between web portals and a PBX using SIP trunks and WebRTC?
Asked once · last asked Feb 19 · Scenario · Mid-level
How would you approach a complex integration between HubSpot and another tool, such as Salesforce, while ensuring data consistency?
Asked once · last asked Feb 20 · Behavioral · Mid-level
Other ways it was asked
- “Tell me about a complex challenge you faced integrating HubSpot with another tool, such as Salesforce. What steps did you take to ensure data consistency?”
How do you decide whether HubSpot should be integrated with another CRM or serve as the primary source of information?
Asked once · last asked Feb 20 · Scenario · Mid-level
When you choose a microservices architecture for its scalability and modularity, how do you ensure communication between services remains efficient and reliable?
Asked once · last asked Feb 25 · Design · Senior
Given that submissions are made through Power Pages and need to flow into a separate Dynamics 365 Dataverse for case management, how would you approach designing a two-way integration, and what tools would you consider?
Asked once · last asked Mar 2 · Design · Senior
How would you divide an application into microservices?
Asked once · last asked Mar 9 · Design · Senior
In an airline booking system, why might a team integrate with Amadeus?
Asked once · last asked Mar 16 · Case · Mid-level
How can a Java server interact with Python machine-learning libraries?
Asked once · last asked Mar 16 · Concept · Mid-level
How do embedded adapters and REST APIs differ when integrating Python libraries with a Java server?
Asked once · last asked Mar 16 · Concept · Mid-level
What challenges can make microservices expensive and difficult to maintain?
Asked once · last asked Mar 18 · Concept · Senior
How would you design integrations between a software platform and external providers?
Asked once · last asked Mar 19 · Design · Senior
If the order service and limit service are decoupled, how should the order service determine whether an order is within the customer's limit?
Asked once · last asked Mar 19 · Design · Senior
Which technologies and frameworks would you use to design and implement a backend microservices workflow?
Asked once · last asked Mar 19 · Design · Mid-level
What steps would you take to implement a backend microservices architecture?
Asked once · last asked Mar 19 · Design · Mid-level
When integrating a blockchain with an existing payment network, what initial steps would you take?
Asked once · last asked Mar 26 · Scenario · Senior
How would you integrate a synchronous legacy system into an asynchronous microservice?
Asked once · last asked Apr 2 · Design · Senior
What are the different ways to integrate a Dynamics 365 application with third-party applications?
Asked once · last asked Apr 6 · Design · Senior
What are the different ways to sync an opportunity from Dynamics 365 CRM with an external system?
Asked once · last asked Apr 6 · Design · Senior
What is the sidecar pattern?
Asked once · last asked Apr 10 · Concept · Mid-level
How can you incrementally move functionality into a microservice while continuing to use the existing monolith?
Asked once · last asked Apr 13 · Design · Senior
How does the choice of backend architecture—microservices, a monolith, or SOA—affect how you plan and implement tasks?
Asked once · last asked Apr 15 · Concept · Mid-level
How would you integrate a third-party API with a CRM system?
Asked once · last asked Apr 24 · Scenario · Mid-level
If services A, B, and C depend on one another, what is needed to connect them, and how would you run them locally to debug code or implement user stories?
Asked once · last asked May 5 · Scenario · Mid-level
How would you assess and modernize an undocumented estate of more than 150 legacy applications—including mainframes, Cognos reporting, applications without APIs, and older HTML front ends—from current-state discovery through target architecture and implementation?
Asked once · last asked May 7 · Design · Senior
What are the benefits and drawbacks of using AWS Transform or CAST to accelerate a current-state application assessment?
Asked once · last asked May 7 · Tooling · Senior
How would you manage an enterprise ERP integration program end to end?
Asked once · last asked May 8 · Scenario · Senior
At a high level, how would you integrate an identity governance and administration solution such as SailPoint with a privileged access management solution such as CyberArk, and what needs to be configured?
Asked once · last asked May 18 · Design · Senior
How would you design scalable microservices for enterprise applications?
Asked once · last asked May 21 · Design · Senior
Other ways it was asked
- “How have you designed scalable microservices for enterprise applications?”
How does managing persistence differ between a monolithic architecture and a microservices architecture?
Asked once · last asked May 22 · Design · Senior
How would you build a workflow automation that connects systems used across teams such as sales and customer success?
Asked once · last asked May 26 · Behavioral · Mid-level
Other ways it was asked
- “Could you share an example of a workflow automation that connected different systems used across teams such as sales and customer success?”
How would you design a FastAPI-based microservice platform?
Asked once · last asked May 27 · Design · Senior
Other ways it was asked
- “Can you describe a FastAPI-based microservice platform that you built or architected?”
What technologies are used to deliver Central Office parameters to the point of sale?
Asked once · last asked Jun 8 · Design · Mid-level
What could be a drawback of the microservice pattern compared with a monolithic pattern?
Asked once · last asked Jun 11 · Concept · Mid-level
How would you use Kafka to integrate a billing system with other systems?
Asked once · last asked Jun 18 · Design · Senior
When integrating CRM, billing, and OCS systems, how would you document the integration, and what should the integration document contain?
Asked once · last asked Jun 18 · Concept · Senior
How would you describe an enterprise Axway Secure Transport architecture, including where it runs and how it is deployed?
Asked once · last asked Jun 18 · Design · Mid-level
What is Axway Edge, and why is it important in an enterprise Axway deployment?
Asked once · last asked Jun 18 · Concept · Mid-level
How would you integrate Dynamics 365 CRM with an existing ERP system?
Asked once · last asked Jun 21 · Design · Mid-level
How would you manage changes and updates to a data integration over time?
Asked once · last asked Jun 21 · Scenario · Mid-level
How would you acquire and integrate data from 14 different products?
Asked once · last asked Jun 22 · Design · Senior
How would you connect user dashboards to food and genetic databases?
Asked once · last asked Jun 23 · Scenario · Mid-level
How do you approach implementing a service in a microservice architecture?
Asked once · last asked Jun 23 · Design · Mid-level
How would you lead the migration of legacy applications to clean, scalable architectures?
Asked once · last asked Jun 24 · Behavioral · Senior
Other ways it was asked
- “How have you led migrations of legacy applications to clean, scalable architectures?”
How would you conduct discovery on a legacy application to identify its type, impacts, dependencies, and other migration considerations?
Asked once · last asked Jun 24 · Scenario · Senior
How would you use discovery findings and documentation to choose a target architecture for a legacy application?
Asked once · last asked Jun 24 · Design · Senior
When refactoring a monolith into microservices, what objective criterion indicates that a proposed service boundary could create a distributed transaction problem?
Asked once · last asked Jul 16 · Design · Senior
How would you manage the technical integration of two networking portfolios after an acquisition?
Asked once · last asked Jul 16 · Scenario · Senior
Other ways it was asked
- “How would you manage the technical integration of Aruba and Juniper networking portfolios after an acquisition?”
How would you integrate a backend service with another service through a REST API?
Asked once · last asked Jul 16 · Design · Mid-level
If you were leading a new integrations team, how would you design its technical infrastructure and team structure to scale from a few integrations to many?
Asked once · last asked Jul 16 · Design · Senior
How would you build an integration from scratch for a webhook-based connection between a manufacturing execution system (MES) and a purchasing system?
Asked once · last asked Jul 16 · Design · Senior
How would you implement consent tracking in Braze as a hard gate when routing messages across multiple channels in real time?
Asked once · last asked Jul 20 · Tooling · Senior
What is a microservices architecture, and how are its components typically structured?
Asked once · last asked Jul 21 · Design · Mid-level
How would you ensure feature parity when migrating a legacy PHP system?
Asked once · last asked Jul 22 · Behavioral · Senior
Other ways it was asked
- “How did you ensure feature parity when migrating a legacy PHP system?”
- “What tools or strategies did you use to ensure a new service matched a legacy PHP system during migration?”
How would you keep an order service and a subscription service consistent when the order service publishes an order-created event?
Asked once · last asked Jul 23 · Scenario · Senior
How do you design integrations between CyberArk and other systems, including the direction of data flows?
Asked once · last asked Jul 27 · Design · Senior
How would you migrate a startup from a monolith to a serverless architecture?
Asked once · last asked Jul 27 · Design · Senior
How would you design a third-party adapter layer, including whether to use push-based or event-based integrations and how to handle the handoff?
Asked once · last asked Jul 30 · Design · Senior
How do you handle real-time changes in an integration, and how do you evaluate its latency?
Asked once · last asked Jul 30 · Design · Senior
During a system migration, should the legacy layers remain operational until the replacement is fully working?
Asked once · last asked Jul 31 · Scenario · Senior
How does data flow from a client through a microservices application, and how do the services communicate with one another?
Asked once · last asked Jul 31 · Design · Mid-level
How would you speed up nightly pricing calculations in a logistics system and split a monolith into microservices?
Asked once · last asked Jul 31 · Design · Senior
What makes a long-running technical migration successful, and how would you make its impact visible?
Asked once · last asked Jul 31 · Scenario · Senior
Other ways it was asked
- “What makes a long-running technical migration successful, and how would you make its impact stand out?”
How do you design and develop a scalable microservice using Spring Boot?
Asked once · last asked Aug 4 · Design · Senior
How do you integrate Genesys Cloud with Epic or Cerner?
Asked once · last asked Aug 5 · Scenario · Senior
How would you design an access-granting workflow when granting access spans multiple subsystems?
Asked once · last asked Aug 7 · Design · Senior
Suppose you're given a monolith and a goal to move to microservices. What decision framework would you use to identify service boundaries and sequence the migration with minimal risk?
Asked once · last asked Aug 11 · Design · Senior
How would you handle cross-service transactions after a system is split into microservices? What consistency model would you choose, and what mechanisms would you use to keep data correct over time?
Asked once · last asked Aug 11 · Design · Senior
How would you design a service that sends speech-recognition data from a device to the cloud and integrates with Odoo, and what problems would you anticipate?
Asked once · last asked Aug 11 · Design · Mid-level
How do you decide whether a shared utility should be a separate package or service versus a module in a monolith, and what failure modes are you trying to avoid?
Asked once · last asked Aug 13 · Design · Senior
When would you rebuild an application as a Salesforce solution versus connecting it through an API or embedding it in an iframe that pulls from the API?
Asked once · last asked Aug 14 · Scenario · Senior
How should responsibility for PII removal and redaction be assigned across services in a data-processing system?
Asked once · last asked Aug 14 · Design · Senior
Why would you use CQRS, and can it help when transitioning to microservices?
Asked once · last asked Aug 20 · Concept · Senior
How would you migrate a business-critical system from legacy PHP to the latest version of Ruby on Rails without disrupting it?
Asked once · last asked Aug 20 · Scenario · Senior
What are your immediate concerns and the key things you would want to know when starting a legacy PHP to Ruby on Rails migration?
Asked once · last asked Aug 20 · Scenario · Senior
How would you architect an integration with Podo/M.E.Doc and Fredo, and what capabilities should it provide?
Asked once · last asked Aug 24 · Design · Mid-level
How would you identify pain points in a legacy workflow, and what challenges would you anticipate when migrating it to an event-driven architecture?
Asked once · last asked Aug 26 · Behavioral · Senior
Other ways it was asked
- “Can you walk me through how you identified the pain points in the legacy workflow and what specific challenges you encountered while migrating to an event-driven architecture?”
What concrete steps would you take to preserve behavioral consistency and maintain trust during a legacy workflow migration to an event-driven architecture, and how would you evaluate the results for the project and team?
Asked once · last asked Aug 26 · Behavioral · Senior
Other ways it was asked
- “What concrete steps did you take to preserve behavioral consistency and maintain trust during a legacy workflow migration to an event-driven architecture, and what were the results?”
How do you design microservices for scalability and resilience to outages?
Asked once · last asked Aug 26 · Design · Senior
How would you handle the strangler pattern and reverse proxy during migration?
Asked once · last asked Aug 26 · Design · Senior
When migrating a monolithic application to cloud native, what factors do you consider and how do you plan it?
Asked once · last asked Sep 2 · Design · Senior
When moving a legacy system to an API-centered architecture, how do you decide what to keep and what to rebuild?
Asked once · last asked Sep 4 · Design · Senior
Which AWS services and microservices patterns would you use when designing a microservices application?
Asked once · last asked Sep 8 · Design · Senior
How would you approach an ERP system migration and resolve its most challenging technical issues?
Asked once · last asked Sep 8 · Scenario · Senior
Other ways it was asked
- “How did you migrate an ERP system, what was the most challenging part, and how did you resolve it?”
What are the Saga and transactional outbox patterns, and how do they address consistency in distributed transactions?
Asked once · last asked Sep 10 · Concept · Senior
How would you design and build an integration between a portfolio management system and an execution management system?
Asked once · last asked Sep 15 · Design · Senior
Other ways it was asked
- “How would you choose an architecture for transporting data between a portfolio management system and an execution management system?”
When would you choose a platform event over Change Data Capture to integrate with an external system, and what trade-offs and criteria would you consider? Give one concrete example.
Asked once · last asked Sep 17 · Design · Senior
How would you design a REST integration from Salesforce that is resilient to transient failures, including your strategies for retries, idempotency, and monitoring? Give your key decisions and one example.
Asked once · last asked Sep 17 · Design · Senior
What is the difference between event-driven architecture and event sourcing architecture?
Asked once · last asked Sep 18 · Concept · Senior
How would you handle near real-time data replication between Salesforce and an external system?
Asked once · last asked Sep 18 · Design · Senior
How would you define systems of record, choose integration patterns, and handle data synchronization, duplicates, and reconciliation between Salesforce, an ERP, and other external systems?
Asked once · last asked Sep 18 · Design · Senior
How would you integrate ERP pricing with Salesforce B2B Commerce when standard pricing entitlements need to be bypassed?
Asked once · last asked Sep 21 · Design · Senior
How do you approach integrating disparate enterprise systems like HR, finance, and inventory?
Asked once · last asked Sep 21 · Design · Senior
How would you divide responsibilities among a gateway, career service, profile service, and opportunity service in a full-stack search system?
Asked once · last asked Sep 22 · Design · Senior
How would you structure an application that integrates several external systems with similar data, different APIs, and different notification mechanisms?
Asked once · last asked Sep 25 · Design · Senior
What would you do if an external provider has capabilities or data that do not fit the common internal model?
Asked once · last asked Sep 25 · Scenario · Senior
How would you approach building or maintaining a microservice, and what challenges would you anticipate?
Asked once · last asked Sep 25 · Behavioral · Senior
Other ways it was asked
- “Tell me about a microservice you built or maintained and the challenges you faced.”
What responsibilities should a marketing microservice handle, how would you scale it, and what challenges might arise?
Asked once · last asked Sep 25 · Design · Senior
What aspects do you consider when designing a Salesforce architecture for integrating multiple external environments?
Asked once · last asked Sep 28 · Design · Senior
How would you integrate a MySQL-backed application with a government portal to submit requests?
Asked once · last asked Sep 28 · Scenario · Mid-level
How would you design an application that integrates with multiple municipal corporation portals?
Asked once · last asked Sep 28 · Design · Mid-level
Can you describe your approach to designing and developing integrations between healthcare technology solutions and external systems, and the key factors you consider for reliability and scalability?
Asked once · last asked Sep 29 · Design · Senior
How would you handle unexpected data formats or validation failures while keeping an integration reliable?
Asked once · last asked Sep 29 · Scenario · Senior
When would you use a monolithic architecture for a large software project?
Asked once · last asked Sep 29 · Concept · Mid-level
How would you design a Salesforce integration with real-time and non-real-time options, and which APIs and technologies would you use?
Asked once · last asked Sep 30 · Design · Senior
Other ways it was asked
- “How would you design this Salesforce integration for real-time and non-real-time options, and which APIs and technologies would you use today?”
How would you plan and execute a transition from a monolithic Salesforce architecture to a modular architecture for a financial services customer?
Asked once · last asked Sep 30 · Design · Senior
How would you architect integration between Salesforce and Oracle Fusion for multiple business data domains?
Asked once · last asked Sep 30 · Design · Senior
Other ways it was asked
- “How would you keep Salesforce and Oracle Fusion in sync?”
How would you implement a Salesforce–Oracle Fusion integration using Boomi?
Asked once · last asked Sep 30 · Design · Senior
What is the integration strategy for large-scale data and event-driven updates?
Asked once · last asked Sep 30 · Design · Senior
What are common integration patterns, and what are example use cases for them in Salesforce Sales Cloud or Service Cloud?
Asked once · last asked Oct 1 · Concept · Senior
How are the different cloud environments and on-premises systems connected and kept in sync in a multi-cloud hybrid CyberArk environment?
Asked once · last asked Oct 1 · Design · Senior
How do you design and govern external IDs and upsert keys across multiple integrated systems to prevent record fragmentation, especially when source systems disagree on system of record?
Asked once · last asked Oct 1 · Design · Senior
How would you integrate a CRM or business platform with a website, CMS, or third-party system using APIs, connectors, or webhooks?
Asked once · last asked Oct 1 · Behavioral · Mid-level
Other ways it was asked
- “Can you give me an example where you integrated a CRM or business platform with a website, CMS, or third-party system using APIs, connectors, or webhooks?”
How would you connect existing Microsoft platforms and layer AI and automation on top?
Asked once · last asked Oct 1 · Design · Senior
What factors would you consider before choosing an architecture, such as starting with a monolith or microservices, for a full-stack application?
Asked once · last asked Oct 6 · Design · Senior
Why might you choose five microservices over a single FastAPI application?
Asked once · last asked Oct 7 · Design · Senior
How would you integrate Office 365, managed through Microsoft Entra ID, with an enterprise application that uses its own authentication mechanism?
Asked once · last asked Oct 8 · Design · Senior
Can Apple AirTags be connected to a website so it can show the current location of each bicycle?
Asked once · last asked Oct 8 · Design · Mid-level
What is the best way to handle communication and failures between an order service and a payment service?
Asked once · last asked Oct 9 · Design · Senior
How would application components communicate in a monolithic architecture versus a microservices architecture?
Asked once · last asked Oct 9 · Design · Mid-level
Other ways it was asked
- “How did the application components communicate, and was the system a monolith or a set of microservices?”
How does data from a smart fridge get into the software system?
Asked once · last asked Oct 10 · Design · Mid-level
Can you walk me through the biggest technical challenge you faced in your modernization work and what you did to address it?
Asked once · last asked Oct 13 · Behavioral · Mid-level
What challenges can arise when mapping an existing code flow during software modernization?
Asked once · last asked Oct 13 · Scenario · Mid-level
How can receipt data from a front end be transferred into an AS/400 system?
Asked once · last asked Oct 15 · Concept · Mid-level
Which system—POS, OMS, or WMS/ERP—should update available-to-promise (ATP), and which events should trigger those updates?
Asked once · last asked Oct 17 · Concept · Senior
What is an anti-corruption layer between a legacy system and a new domain model?
Asked once · last asked Oct 18 · Concept · Senior
If a legacy system uses one status, "closed," while a new domain model distinguishes completed work from canceled work, how should the boundary handle that status?
Asked once · last asked Oct 18 · Scenario · Senior
What does it indicate when new services read fields directly from a legacy database instead of going through an anti-corruption layer?
Asked once · last asked Oct 18 · Scenario · Senior
Other ways it was asked
- “What does it indicate when new services read legacy database fields directly instead of using a translation layer?”
What effect can direct dependence on legacy database fields and their meanings have on new services?
Asked once · last asked Oct 18 · Concept · Senior
How would you address a difficult integration issue between a simulator control app and a web platform, and choose an appropriate design?
Asked once · last asked Oct 20 · Behavioral · Mid-level
Other ways it was asked
- “What was the toughest integration issue between a simulator control app and a web platform, and what design decision did you make?”
How would you integrate Venafi or another certificate lifecycle management platform to automate certificate issuance across infrastructure?
Asked once · last asked Oct 20 · Behavioral · Senior
Other ways it was asked
- “Share an example where you integrated Venafi or another certificate lifecycle management platform to automate certificate issuance across infrastructure.”
Design a service that updates its own PostgreSQL database and communicates with two external enterprise systems. One downstream system can occasionally be unavailable. How would you design transaction boundaries, retry and timeout handling, and consistency?
Asked once · last asked Oct 21 · Design · Senior
How should a contract service handle business-rule validation, such as checking whether a client is active, before registering a contract?
Asked once · last asked Oct 21 · Scenario · Mid-level
How do you ensure a request that involves multiple microservices completes end to end, and what do you do if one service fails?
Asked once · last asked Oct 23 · Design · Senior
What key architectural principles and patterns will you discuss with our technical leadership for a new ecommerce platform integrating with a legacy mainframe, an order management system, and Salesforce?
Asked once · last asked Oct 23 · Design · Senior
How would you make sure multiple teams can work independently on product search, cart and checkout, and order tracking and delivery while going live as soon as possible?
Asked once · last asked Oct 23 · Design · Senior
When you need to break up a monolith into microservices, what criteria do you use to choose the first service to extract, and how do you minimize risk during the transition?
Asked once · last asked Oct 24 · Design · Senior
When you review a pull request that introduces a new service boundary, what specific things do you look for to prevent hidden coupling such as shared database tables, synchronous chatty calls, and leaked domain concepts?
Asked once · last asked Oct 24 · Scenario · Senior
How do you approach integrating APIs into an enterprise application?
Asked once · last asked Sep 22 · Scenario · Mid-level
Other ways it was asked
- “What are common challenges when integrating APIs into an enterprise application, and how would you address them?”
What is event-driven architecture?
Asked once · last asked Feb 22 · Concept · Junior
What role does a third-party vendor play in a payment-card ordering system, and what does the card service use it for?
Asked once · last asked Mar 16 · Design · Mid-level
How would you design and integrate the components of an automation solution?
Asked once · last asked Apr 9 · Design · Mid-level
What are the layers of services and microservices?
Asked once · last asked Jun 15 · Concept · Mid-level
What is domain-based migration?
Asked once · last asked Jun 24 · Concept · Mid-level
What is the modular monolith approach?
Asked once · last asked Jul 23 · Concept · Mid-level
What are system integrators in cloud computing?
Asked once · last asked Dec 4 · Concept · Junior
What types of projects are a good fit for a microservices architecture?
Asked once · last asked Aug 20 · Concept · Mid-level
Which international payment systems are alternatives to Stripe?
Asked once · last asked Sep 10 · Concept
How would you send existing requests to a back-office system?
Asked once · last asked Sep 18 · Scenario · Mid-level
Other ways it was asked
- “How would you write existing requests to a back-office system?”
What are alternatives to using an orchestrator in a distributed workflow?
Asked once · last asked Sep 18 · Concept · Senior
Can a monolithic architecture still be scalable?
Asked once · last asked Sep 24 · Concept · Mid-level
What does integrating a payment provider into a backend application involve?
Asked once · last asked Oct 7 · Concept · Mid-level
Should an order service call the payment service's endpoint directly?
Asked once · last asked Oct 9 · Concept · Mid-level
What is service discovery?
Asked once · last asked Oct 12 · Concept · Mid-level
How would you design a synchronization process with ClickBank?
Asked once · last asked Oct 22 · Design · Mid-level
Other ways it was asked
- “How would you migrate data and synchronize with ClickBank without losing data or causing downtime?”
More System Design interview questions
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How this list is made
Every question here was asked by a real interviewer in a real job interview that a candidate ran MeetAssist in. After the call, the interviewer's questions are pulled from the transcript. Practice sessions, tests, exams and anything that was not a job interview are dropped.
Questions are rewritten so they make sense on their own: names of people, employers and clients are removed, and speech-to-text mistakes are fixed. Small talk, logistics and questions about one candidate's own résumé are left out. Rephrasings of the same question are merged, and the count is the number of different interviews it came up in.
The interviews come from candidates who use MeetAssist, so they lean towards software, data and AI roles: the shares describe these interviews, not every System Design interview. Answers to the most asked questions are written and checked by an editor; a "common mistake" is shown only when reviews of real answers in these interviews show it, with the count.
942 interviews, 495 candidates, Oct 2025 to Oct 2026. Updated every month with new interviews.
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