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ISTQB Certified Tester - Performance Testing Sample Questions (Q32-Q37):

NEW QUESTION # 32
You have run a load test. When examining the metrics, you see that the virtual users experienced many timeouts and excessive wait times. The system throughput metrics exceeded expected results, even during peak times.
Based on your analysis, what conclusion should you draw?

A. New test data is needed.
B. Processing speed is too slow.
C. Virtual users are exhibiting impatient behavior.
D. Network infrastructure should be investigated.

Answer: B

Explanation:
If timeouts and excessive wait times occur, but throughput is high, this suggests that the system is unable to process requests fast enough. This points to slow processing speed due to CPU bottlenecks, memory limitations, or inefficient database queries.
Option A (Network infrastructure investigation) would be relevant if throughput was low or variable.
Option C (Impatient virtual users) is irrelevant; virtual users follow scripted behaviors.
Option D (New test data) does not address the core issue.

NEW QUESTION # 33
Which of the following is the best description of spike testing?

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

Answer: B

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 # 34
What challenge must be considered when using crowds to emulate load generation?

A. The load generation method is less sensitive to changes in the III.
B. This type of load generation is more suitable for mainframe applications.
C. This technique is more precise than other methods of load generation.
D. The load generation will be difficult to reproduce.

Answer: D

Explanation:
Crowd-based load generation involves using distributed users (e.g., cloud-based testers or real users). The main challenge is that the load generation can be difficult to reproduce consistently due to variations in network conditions, device types, and user behavior.
Option B is incorrect because load generation methods should adapt to system changes.
Option C is incorrect since mainframe applications typically do not rely on crowd-based testing.
Option D is incorrect because crowd-sourced load testing is generally less precise than scripted load testing.

NEW QUESTION # 35
Which of the following could lead to inconsistent performance test results?

A. Expected results were not verified with senior management.
B. Virtual users running the same script while logged in as the same user.
C. Concurrent scripts running and attempting to access the same data.
D. Sequential scripts running and attempting to access the same data.

Answer: B

Explanation:
If multiple virtual users execute the same script while logged in as the same user, it can cause data conflicts, session collisions, or cache interference, leading to inconsistent performance test results.
Option A (Concurrent scripts accessing the same data) may cause data locking issues, but this is a test setup concern rather than an inconsistency issue.
Option B (Sequential scripts accessing the same data) does not typically cause inconsistencies since they execute in order.
Option D (Verification with management) is unrelated to technical inconsistencies.

NEW QUESTION # 36
Which of the following is an advantage of using performance monitoring tools?

A. They proactively compile metrics from server logs.
B. They can prevent malicious behavior.
C. They can proactively detect denial-of-service (DoS) attacks.
D. They more easily identify and report multi-threading problems.

Answer: A

Explanation:
Performance monitoring tools collect real-time and historical performance data, particularly from server logs, application metrics, and infrastructure monitoring. This allows testers to analyze performance trends efficiently.
Option A is incorrect because monitoring tools do not prevent malicious behavior but may detect it.
Option C is incorrect since identifying multi-threading issues is typically done through profiling tools rather than performance monitors.
Option D is incorrect as DoS attack detection falls under security testing.

NEW QUESTION # 37
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