A team is performance testing a service-oriented architecture (SOA) with synchronous communication. They notice that the 'order' service is slow, but its CPU and memory are low. The 'inventory' service that it calls is also underutilized. The team suspects a network issue. Which diagnostic step is most effective to confirm this?

Restart the order service to clear any temporary issues

Increase the number of threads in the order service

Check the database query execution plan in the inventory service

Measure the network latency between the order and inventory services

A company is designing a new system using a microservices architecture. The team is concerned about the performance impact of synchronous communication between services. Which design change is most likely to reduce this risk?

Use asynchronous communication via message queues

Combine all services into a single monolithic application

Use a single database for all services

Increase the number of instances of each service

A team is performance testing a client-server application. The server has multiple CPUs and a single database. During a load test, the database CPU is at 100%, but the application server CPU is at 40%. Which bottleneck is most likely?

The application server's memory is the bottleneck

The network between the client and server is the bottleneck

The application server is the bottleneck

A company is migrating from a monolithic application to a microservices architecture. The team has identified that the current monolith has a bottleneck in the database. In the new architecture, each service will have its own database. Which performance risk is most likely to be introduced by this change?

Reduced scalability because each service has its own database

Simplified performance testing because services are isolated

Data consistency issues causing performance problems due to distributed transactions

Increased database contention because all services share the same database

In a client-server architecture, which component is most likely to become a bottleneck under heavy load?

The server's processing capacity

Certified Tester Performance Testing

Domain 3Objective 2

Categories of Performance Risks for Different Architectures CT-PT Practice Questions (Page 3)

Part of the Performance Testing in the Software Lifecycle domain, which makes up ~19% of our current practice bank. ISTQB does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–11 in this domain), expect 2–3 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

4concepts

Questions 11–15

11expert · hard
A team is performance testing a service-oriented architecture (SOA) with synchronous communication. They notice that the 'order' service is slow, but its CPU and memory are low. The 'inventory' service that it calls is also underutilized. The team suspects a network issue. Which diagnostic step is most effective to confirm this?
Select an answer first
12expert · hard
A company is designing a new system using a microservices architecture. The team is concerned about the performance impact of synchronous communication between services. Which design change is most likely to reduce this risk?
Select an answer first
13expert · hard
A team is performance testing a client-server application. The server has multiple CPUs and a single database. During a load test, the database CPU is at 100%, but the application server CPU is at 40%. Which bottleneck is most likely?
Select an answer first
14expert · hard
A company is migrating from a monolithic application to a microservices architecture. The team has identified that the current monolith has a bottleneck in the database. In the new architecture, each service will have its own database. Which performance risk is most likely to be introduced by this change?
Select an answer first
15foundation · easy
In a client-server architecture, which component is most likely to become a bottleneck under heavy load?
Select an answer first

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Categories of Performance Risks for Different Architectures CT-PT Practice Questions (Page 3)

Questions 11–15

A company is designing a new system using a microservices architecture. The team is concerned about the performance impact of synchronous communication between services. Which design change is most likely to reduce this risk?

A team is performance testing a client-server application. The server has multiple CPUs and a single database. During a load test, the database CPU is at 100%, but the application server CPU is at 40%. Which bottleneck is most likely?

In a client-server architecture, which component is most likely to become a bottleneck under heavy load?

Keep studying — Performance Testing in the Software Lifecycle