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ISTQB CT-PT Exam Syllabus Topics:

Topic	Details
Topic 1	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 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	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 4	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.

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ISTQB Certified Tester - Performance Testing Sample Questions (Q37-Q42):

NEW QUESTION # 37
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. During the software design phase when the requirements are set and the design is being defined
B. After test readiness has been achieved, but before system testing starts
C. During the requirements phase when the business stakeholders have the opportunity to agree
D. At the very beginning of the project during the concept stage

Answer: C

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 # 38
Which of the following should be a key part of your test acceptance criteria in your performance test plan?

A. Convincing technical and business stakeholders to provide realistic performance goals for the regional servers
B. Highlighting any technical differences in the hardware between the test environment and the production environment
C. Describing the system under test in order to provide context to the metrics
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 # 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 preparing a presentation to the business stakeholders, outlining your performance testing strategy.
Which of the following is appropriate to present to this audience?

A. A comprehensive list of support staff to be available during performance testing, including key members of the application development team
B. Established HTTP response per second goals that will have acceptable minimum, maximum, and average response times
C. The risks that may exist due to platform differences between the test environment and the production environment
D. A test plan that includes specific technical specifications for the computing hardware to be used for performance testing

Answer: C

Explanation:
Business stakeholders are most concerned with risks that affect deployment and production stability. The primary risk in performance testing is that the test environment may differ from production, leading to misleading test results.
Option A (HTTP response goals) is too technical for a business stakeholder audience.
Option B (Hardware specifications) is relevant for technical teams, not business stakeholders.
Option C (Support staff details) is a logistical aspect, not a key performance testing risk for business decision-makers.

NEW QUESTION # 40
What should be captured for batch processing performance metrics?

A. Number of records deleted
B. Throughput and wait times
C. Average percentage of network latency
D. Number of concurrent virtual users

Answer: B

Explanation:
For batch processing performance metrics, the two most important factors are:
Throughput - Measures the number of transactions processed over time.
Wait times - Evaluates delays in processing batches.
Option B (Number of records deleted) is irrelevant unless batch processing specifically involves deletions.
Option C (Network latency percentage) applies to real-time transaction processing, not batch jobs.
Option D (Concurrent virtual users) applies more to load testing rather than batch performance.

NEW QUESTION # 41
What challenge must be considered when using crowds to emulate load generation?

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

Answer: C

Explanation:
Crowd-based load generation relies on real users from different locations, making test conditions highly variable. This makes it difficult to reproduce the same test scenario multiple times under identical conditions.
Option B (Less sensitive to changes) is incorrect because crowd-based load is highly sensitive to external conditions (network, device types, etc.).
Option C (Suitable for mainframe applications) is incorrect because crowd-based load testing is typically used for web and cloud applications, not mainframes.
Option D (More precise than other methods) is incorrect because crowd-based load testing lacks precision due to real-world inconsistencies.

NEW QUESTION # 42
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