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ISTQB CT-PT Exam Syllabus Topics:

Topic
Details

Topic 1

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 2

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 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

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 (Q37-Q42):

NEW QUESTION # 37
What challenge must be considered when using crowds to emulate load generation?

A. This technique is more precise than other methods of load generation.
B. The load generation method is less sensitive to changes in the III.
C. This type of load generation is more suitable for mainframe applications.
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 # 38
Which of the following is the most economical solution to minimize costs and time for performance testing for a high-end production client-server platform?

A. Mainframe environment
B. No environment
C. Cloud-based environment
D. Isolated lab environment

Answer: C

Explanation:
A cloud-based environment is the most cost-effective solution for performance testing. It offers scalability, pay-per-use models, and flexibility, allowing testers to simulate large workloads without expensive infrastructure investments.
Option A (Isolated lab environment) is costly due to hardware maintenance and infrastructure costs.
Option C (Mainframe environment) is expensive and impractical for performance testing.
Option D (No environment) is not a viable option.

NEW QUESTION # 39
You are managing the testing efforts of an existing distributed system that manages inventories of automobile and light truck tires from multiple warehouses across the country. The system is being enhanced to track incoming restocking shipments at the point of entry to the warehouse and outbound sales shipments at the point of shipment from the warehouse, all of which are executed in real-time. System loads traditionally peak on Mondays due to built-up demand from the previous weekend.
You are constructing an operational profile that emulates entities that submit large, bulk orders of greater than or equal to 1600 tires per transaction. You feel the profile you are constructing accurately reflects this type of power purchaser.
Which of the following steps must you take to ensure your operational profile is accurate?

A. Aggregate the specific operational profiles into a single generic profile and use that generic profile for load testing.
B. Execute the performance test with the operational profile and adjust the parameters as needed.
C. Based on the power purchaser information, create operational profiles for low and medium purchasers and use equal proportions of those profiles during the testing.
D. Review and adjust the profile with key stakeholders prior to using it.

Answer: D

Explanation:
To ensure an accurate operational profile, it is crucial to validate and adjust it with key stakeholders before executing tests. This step ensures that the workload realistically represents actual user behavior.
Option A (Executing the test first and adjusting later) is incorrect because adjustments should be made before execution to avoid misleading results.
Option C (Aggregating profiles into a single generic profile) removes important distinctions between different user types, reducing test accuracy.
Option D (Creating separate profiles and using equal proportions) does not match the actual power purchaser behavior, which requires a realistic representation of their higher-volume transactions.

NEW QUESTION # 40
Which of the following is considered a common web service protocol?

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

Answer: D

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 # 41
Which of the following could lead to inconsistent performance test results?

A. Sequential scripts running and attempting to access the same data.
B. Virtual users running the same script while logged in as the same user.
C. Expected results were not verified with senior management.
D. Concurrent 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 # 42
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