Performance Risks Across the Software Development Lifecycle CT-PT Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A team is developing a mobile app that syncs data with a backend server. During the design phase, they identify a risk that the sync process may consume excessive battery and data on mobile devices. Which mitigation strategy is most appropriate?

   • AIgnore the risk because mobile devices have sufficient resources.
   • BIncrease the sync frequency to ensure data is always up to date.
   • CDesign the sync process to be incremental and to run only when the device is connected to Wi-Fi and charging.
   • DRemove the sync feature entirely to avoid the risk.
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2. 22application · medium

   During the design phase, the architecture team proposes using a single relational database for both transactional and reporting workloads. The performance test lead is asked to identify potential performance risks. Which risk is most likely to arise from this design?

   • AHeavy reporting queries could degrade the response times of transactional operations under load.
   • BThe database will automatically scale to handle mixed workloads without any configuration.
   • CThe design has no performance risk because the database is a standard component.
   • DReporting queries will always be faster than transactional queries because they are read-only.
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4. 23application · medium

   A team is developing a real-time chat application. During the design phase, they identify a risk that the WebSocket connections may not scale to support the expected number of concurrent users. Which mitigation strategy is most appropriate?

   • ADesign the chat service to be horizontally scalable, using a load balancer to distribute WebSocket connections across multiple servers.
   • BDefer the decision until after the application is deployed and monitor the load.
   • CUse a single powerful server to handle all connections.
   • DLimit the number of concurrent users to a fixed maximum to avoid overloading the server.
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5. 24foundation · easy

   A project team decides to use a new caching framework during the design phase. Which performance risk is most directly associated with this decision?

   • ALack of user training on the new system
   • BInsufficient test data volume in the test environment
   • CIncorrect cache invalidation leading to stale data
   • DNetwork latency between the application and the database
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6. 25application · medium

   A team is starting a new web application project. During the requirements phase, they document that the system must support 500 concurrent users during peak hours, but they do not specify any performance targets for response times or resource utilization. The project manager wants to avoid performance issues later. What is the most effective action to take during this phase?

   • AAssume the architecture will handle the load because it uses a popular framework.
   • BDefer performance testing until after the system is fully developed to avoid constraining the design.
   • CDefine measurable performance acceptance criteria, such as response time percentiles and error rate thresholds, for the key user journeys.
   • DAsk the operations team to monitor production after launch and report any performance problems.
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