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ISTQB CT-PT Exam Questions - Updated Frequently

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ISTQB CT-PT Exam Syllabus Topics:

Topic
Details

Topic 1

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.

Topic 2

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 3

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 4

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.

ISTQB Certified Tester - Performance Testing Sample Questions (Q40-Q45):

NEW QUESTION # 40
Which of the following is a typical performance risk associated with distributed architectures?

A. Excess computer memory resources
B. Inconsistent Bluetooth connectivity
C. Unreliable or unpredictable remote servers
D. A local hard disk that has been de-fragmented

Answer: C

Explanation:
A key risk in distributed systems is unreliable remote servers, which can lead to latency, timeouts, and failures in performance testing.
Option A (Hard disk de-fragmentation) is not a significant risk in distributed systems.
Option B (Excess memory) is a positive factor, not a risk.
Option D (Bluetooth connectivity) is unrelated to distributed system performance.

NEW QUESTION # 41
Which of the following should be a key part of your test acceptance criteria in your performance test plan?

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

Answer: C

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 # 42
Which of the following is a key reason to include ramp-up and ramp-down periods in a performance test?

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

Answer: A

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 # 43
Which of the following performance script types measures network response times?

A. GUI scripts
B. Protocol-level scripts
C. API scripts
D. HTTP scripts

Answer: B

Explanation:
Protocol-level scripts measure the actual response times of network requests, making them ideal for analyzing network latency, bandwidth issues, and server response times.
Option A (GUI scripts) measure user interactions, not network timing.
Option B (API scripts) measure API interactions but do not provide detailed network response time analysis.
Option C (HTTP scripts) measure web requests but lack low-level network insights.

NEW QUESTION # 44
You are heading the testing effort for a system that manages the air/fuel ratio of direct-injection fuel devices built specifically for high-altitude rescue helicopter engines. At altitude, the system must be able to perform in order to make enough air/fuel ratio adjustments per millisecond between fuel and both an on-board source and available ambient air in order to prevent an engine stall due to oxygen starvation. The system is following a sequential development lifecycle.
For this safety-critical software, when is the appropriate point in the lifecycle to identify and define the performance goals?

A. After test readiness has been achieved, but before system testing starts
B. During the requirements phase when the business stakeholders have the opportunity to agree
C. At the very beginning of the project during the concept stage
D. During the software design phase when the requirements are set and the design is being defined

Answer: B

Explanation:
For safety-critical software, performance goals must be identified as early as the requirements phase. This ensures that performance constraints are well understood and accounted for throughout development.
Option A (After test readiness but before system testing) is too late, as requirements should be defined before coding begins.
Option C (During the concept stage) is too early, as details may not be concrete.
Option D (During software design) is useful but should be preceded by a proper definition during the requirements phase.

NEW QUESTION # 45
......

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