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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	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 3	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 4	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.

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ISTQB Certified Tester - Performance Testing Sample Questions (Q22-Q27):

NEW QUESTION # 22
Which of the following is the best description of spike testing?

A. It focuses on the ability of the system to meet future efficiency requirements.
B. It focuses on the ability of the system to handle loads that are at or beyond the expected peak load.
C. It focuses on the ability of the system to respond to quick and extreme changes in load.
D. It focuses on the ability of the system to handle loads that are gradually increased to reach the expected maximum.

Answer: C

Explanation:
Spike testing is a type of performance testing that evaluates how a system responds to sudden, extreme increases or decreases in load. It is designed to simulate unexpected surges in user activity or workload, such as flash sales, viral events, or cyberattacks.
Option A (Gradual load increase testing) describes load testing, not spike testing.
Option B (Handling expected peak load) describes stress testing, which pushes the system to or beyond its limits but does not focus on sudden changes.
Option C (Meeting future efficiency requirements) relates to capacity planning rather than spike testing.
Spike testing helps to identify system bottlenecks, resource allocation issues, and performance degradation when traffic surges unexpectedly.

NEW QUESTION # 23
Which of the following is a typical performance risk associated with mainframe architectures?

A. Misconfigured host machine
B. Lack of RAM
C. Slow hard disk speed
D. Inconsistent loads when accessed via APIs

Answer: C

Explanation:
One of the key performance risks in mainframe architectures is slow hard disk speed, which can impact transaction processing, batch jobs, and database access times.
Option A (Inconsistent loads via APIs) is more relevant to distributed or cloud architectures rather than mainframes.
Option C (Misconfigured host machine) is a configuration issue, not a typical performance risk.
Option D (Lack of RAM) is less common in mainframes, which typically use optimized memory management.

NEW QUESTION # 24
Which of the following is considered a common web service protocol?

A. HTTP
B. REST
C. SOAK
D. RTE

Answer: B

Explanation:
REST (Representational State Transfer) is a widely used web service protocol that enables client-server communication over HTTP. It is commonly used in modern APIs and web applications for performance testing.
Option A (SOAK) refers to soak testing, which evaluates performance over an extended period.
Option C (HTTP) is a transport protocol, but REST is the actual web service architecture built on HTTP.
Option D (RTE) is not a web service protocol but may refer to Real-Time Enterprise systems.

NEW QUESTION # 25
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. Error logging will decrease.
C. Response time will gradually improve over a period of time.
D. Response time will be slow under significant load levels.

Answer: D

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 # 26
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. Understand the delta between the results from previous performance tests and the results from the expected performance improvements.
D. Realign performance test objectives with business stakeholders to meet project milestone dates.

Answer: C

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 # 27
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