A performance test on a multi-tier application shows that the end-to-end response time is 8 seconds. The web server response time is 1 second, the application server response time is 2 seconds, and the database server response time is 4 seconds. The network latency between each tier is 10 ms. Which conclusion is best supported by these metrics?

The web server is the primary bottleneck because it is the first tier

The network is the primary bottleneck due to the latency between tiers

The database server is the primary bottleneck, contributing the largest portion of the response time

The application server is the primary bottleneck because it processes business logic

Which of the following is an example of a server-side performance metric?

CPU utilization of the application server

Page render time in the browser

Network latency between client and server

A performance test on a video streaming service shows that the server-side response time is 200 ms, but the client-side playback starts after 5 seconds. The network latency is 30 ms, and the server CPU is at 20%. The test engineer suspects the issue is not the server or the network. Which metric source would best confirm this hypothesis?

Network metrics showing the time to first byte

Server-side logs showing the time to generate the video manifest

Client-side metrics showing the time spent on buffering and media initialization

Infrastructure metrics showing the disk I/O on the media server

Which of the following is a primary source for collecting performance metrics?

Test environment configuration files

Certified Tester Performance Testing

Domain 2Objective 5

Key Sources of Performance Metrics CT-PT Practice Questions (Page 5)

Part of the Performance Measurement Fundamentals domain, which makes up ~28% of our current practice bank. ISTQB does not publish an official question count, but from its 90-minute exam (~35–60 total, ~10–17 in this domain), expect 2–3 from this objective — we provide 30 practice questions to prepare you well beyond it. (estimate)

30questions here

6free pages

6concepts

Questions 21–25

21foundation · easy
During a load test, a load testing tool reports the number of requests completed per second. Which metric is this?
Select an answer first
22expert · hard
A performance test on a multi-tier application shows that the end-to-end response time is 8 seconds. The web server response time is 1 second, the application server response time is 2 seconds, and the database server response time is 4 seconds. The network latency between each tier is 10 ms. Which conclusion is best supported by these metrics?
Select an answer first
23foundation · easy
Which of the following is an example of a server-side performance metric?
Select an answer first
24expert · hard
A performance test on a video streaming service shows that the server-side response time is 200 ms, but the client-side playback starts after 5 seconds. The network latency is 30 ms, and the server CPU is at 20%. The test engineer suspects the issue is not the server or the network. Which metric source would best confirm this hypothesis?
Select an answer first
25foundation · easy
Which of the following is a primary source for collecting performance metrics?
Select an answer first

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Key Sources of Performance Metrics CT-PT Practice Questions (Page 5)

Questions 21–25

During a load test, a load testing tool reports the number of requests completed per second. Which metric is this?

Which of the following is an example of a server-side performance metric?

Which of the following is a primary source for collecting performance metrics?

Keep studying — Performance Measurement Fundamentals