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ISTQB CT-PT Exam Syllabus Topics:

Topic
Details

Topic 1

Testing Types in Performance Testing: This section of the exam introduces the distinction between static and dynamic performance testing. It shows how reviews of requirements, architecture, and code can identify risks before coding is complete, and how runtime checks of resource utilization and response times reveal issues that only appear when the system is in operation.

Topic 2

The Concept of Load Generation: This section of the exam measures the skills of Software Test Analysts and discusses how representative loads are modeled and produced to simulate user or process behavior. It explores methods such as user interface inputs, crowdsourcing, API-based calls, or protocol capture and playback, emphasizing the need for repeatable loads that accurately reflect real-world conditions.

Topic 3

Common Failures in Performance Testing and Their Causes: This section of the exam measures the skills of Performance Engineers and outlines frequent failure modes, including slow responses at various load levels, degraded performance over time, and system crashes under peak conditions. It provides examples of underlying causes such as resource leaks, insufficient capacity, and poor handling of spikes or concurrency, illustrating why robust planning and monitoring are crucial for reliable performance.

Topic 4

Types of Performance Testing: This section of the exam measures the skills of Software Test Analysts and covers various approaches such as load, stress, scalability, spike, endurance, concurrency, and capacity testing. It explains how each type evaluates system behavior under different conditions, helping testers and stakeholders understand how the system handles both expected and extreme usage scenarios.

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ISTQB Certified Tester - Performance Testing Sample Questions (Q16-Q21):

NEW QUESTION # 16
Which of the following is a key reason to include ramp-up and ramp-down periods in a performance test?

A. To provide a buffer for slow-performing transactions to complete
B. To simulate a more realistic user load pattern and avoid sudden system stress
C. To ensure virtual users complete their transactions within a defined time window
D. To guarantee that all virtual users remain active throughout the test duration

Answer: B

Explanation:
A ramp-up period in a performance test gradually increases load over time, and a ramp-down period does the opposite. This prevents sudden surges in system load, making test results more realistic.
Option A (Ensuring transactions complete in a time window) is incorrect because ramp-up/down periods do not control transaction timing.
Option C (Providing a buffer for slow transactions) is incorrect because ramp-up/down is about load balancing, not transaction timing.
Option D (Keeping all virtual users active throughout the test) is incorrect because ramp-down periods reduce users gradually.

NEW QUESTION # 17
Which of the following should be a key part of your test acceptance criteria in your performance test plan?

A. Describing the system under test in order to provide context to the metrics
B. Highlighting any technical differences in the hardware between the test environment and the production environment
C. Convincing technical and business stakeholders to provide realistic performance goals for the regional servers
D. Documenting previously baselined performance metrics in order to compare these to the new performance measurements

Answer: B

Explanation:
One of the most critical test acceptance criteria in performance testing is to ensure that the hardware in the test environment is comparable to production. Differences in CPU, memory, disk I/O, or network infrastructure can distort performance results.
Option A (Convincing stakeholders to set goals) is a planning activity, not an acceptance criterion.
Option B (Describing the system under test) is important but does not directly affect test acceptance.
Option D (Comparing baselined metrics) is useful, but without a comparable test environment, baseline metrics may be misleading.

NEW QUESTION # 18
Which of the following is usually identified by a performance test?

A. Suitability issues
B. Resource bottlenecks
C. Failure to meet accessibility requirements
D. Learnability concerns

Answer: B

Explanation:
Performance tests primarily identify resource bottlenecks such as CPU saturation, memory leaks, network congestion, and database slowdowns.
Option B (Suitability issues) is a functional requirement concern, not a performance issue.
Option C (Learnability concerns) relates to usability testing, not performance.
Option D (Accessibility requirements) falls under compliance and usability testing, not performance testing.

NEW QUESTION # 19
Which of the following is typically the result of oversaturation of system resources during performance testing?

A. The size of the database will gradually decrease.
B. Response time will gradually improve over a period of time.
C. Response time will be slow under significant load levels.
D. Error logging will decrease.

Answer: C

Explanation:
When system resources (e.g., CPU, RAM, I/O) are oversaturated, the system becomes overloaded, leading to increased response times and poor application performance.
Option A (Gradual improvement of response time) is incorrect because performance degrades under heavy load.
Option C (Error logging decreases) is unlikely; in most cases, errors increase when systems reach their limits.
Option D (Database size decreases) is unrelated to performance saturation.

NEW QUESTION # 20
Stakeholders were unhappy with previous performance test results, which indicated that the adjustments were not made fast enough and engine stall was probable. The developers have now made changes that they believe will significantly improve the performance of the adjustments.
What should you do to ensure the performance test objectives have been properly defined before you run the next set of performance tests?

A. Realign performance test objectives with all stakeholders to meet time-to-market goals.
B. Adjust stakeholder expectations to be more aligned with the reality of the previous test results.
C. Realign performance test objectives with business stakeholders to meet project milestone dates.
D. Understand the delta between the results from previous performance tests and the results from the expected performance improvements.

Answer: D

Explanation:
Before running the next set of performance tests, it is crucial to understand the differences (delta) between the previous test results and the expected improvements. This ensures that:
The changes made by developers are properly validated.
Performance objectives are aligned with measurable improvements.
Option B (Adjust stakeholder expectations) is incorrect, as performance testing should focus on real data rather than adjusting expectations.
Option C and D (Realign objectives for milestones or time-to-market goals) are incorrect because test objectives should focus on technical accuracy rather than schedule constraints.

NEW QUESTION # 21
......

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