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ISTQB CT-PT Exam Syllabus Topics:
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NEW QUESTION # 13
Which of the following is usually identified by a performance test?
- A. Suitability issues
- B. Resource bottlenecks
- C. Learnability concerns
- D. Failure to meet accessibility requirements
Answer: B
Explanation:
Performance tests primarily identify resource bottlenecks such as CPU saturation, memory leaks, network congestion, and database slowdowns.
Option B (Suitability issues) is a functional requirement concern, not a performance issue.
Option C (Learnability concerns) relates to usability testing, not performance.
Option D (Accessibility requirements) falls under compliance and usability testing, not performance testing.
NEW QUESTION # 14
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 handle loads that are gradually increased to reach the expected maximum.
- C. It focuses on the ability of the system to meet future efficiency requirements.
- D. It focuses on the ability of the system to respond to quick and extreme changes in load.
Answer: D
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 # 15
When following the principal performance testing activities, when are resources allocated?
- A. During test execution
- B. During test evaluation
- C. During test planning
- D. During test completion
Answer: C
Explanation:
Resource allocation happens during the test planning phase, where hardware, tools, and personnel are assigned to the project. This ensures that performance tests are adequately supported.
Option B (Test execution) is when resources are actually used, not allocated.
Option C (Test evaluation) happens after execution to analyze results.
Option D (Test completion) focuses on documentation and reporting.
NEW QUESTION # 16
Which of the following is a key reason to include ramp-up and ramp-down periods in a performance test?
- A. To provide a buffer for slow-performing transactions to complete
- B. To guarantee that all virtual users remain active throughout the test duration
- C. To ensure virtual users complete their transactions within a defined time window
- D. To simulate a more realistic user load pattern and avoid sudden system stress
Answer: D
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 # 17
What challenge must be considered when using crowds to emulate load generation?
- A. The load generation will be difficult to reproduce.
- B. This technique is more precise than other methods of load generation.
- C. This type of load generation is more suitable for mainframe applications.
- D. The load generation method is less sensitive to changes in the system under test.
Answer: A
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 # 18
What is the primary purpose of a load generator?
- A. Support root cause analysis when performance degradation is encountered
- B. Record and analyze the behavior of the system as it is executing the prescribed tests
- C. Create a steady and consistent background load on the system
- D. Simulate user behavior in accordance with the defined operational profile
Answer: D
Explanation:
A load generator is responsible for simulating virtual users and applying workloads to a system as defined by an operational profile. This allows testers to analyze how the system behaves under different load conditions.
Option A (Background load) is incorrect because load generators create simulated user interactions, not just background noise.
Option C (Record and analyze behavior) is the role of monitoring tools, not a load generator.
Option D (Support root cause analysis) is incorrect because root cause analysis is done after the load test, using monitoring tools.
NEW QUESTION # 19
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 # 20
During performance testing, in addition to the transaction response time, which of the following is needed to accurately reflect the total time to complete a transaction?
- A. Action time
- B. User time
- C. Wait time
- D. Think time
Answer: C
Explanation:
Wait time is the period a transaction spends waiting for resources, database responses, or external services before completing. It is critical for understanding real-world transaction durations.
Option A (Think time) refers to user delays, not system delays.
Option C (Action time) focuses on execution time only.
Option D (User time) is not a standard performance metric.
NEW QUESTION # 21
Which of the following can provide measurements for both individual and aggregated elements within a single performance test?
- A. Nested transactions
- B. Process optimization tracking
- C. Measuring underlying transactions
- D. Aggregated metrics
Answer: A
Explanation:
Nested transactions allow performance tests to capture both individual and aggregated elements by grouping multiple related transactions and measuring their cumulative impact.
Option A (Aggregated metrics) provides summaries but lacks insight into individual elements.
Option B (Process optimization tracking) focuses on business process improvement, not test metrics.
Option C (Measuring underlying transactions) focuses only on individual transactions.
NEW QUESTION # 22
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. Virtual users are exhibiting impatient behavior.
- B. Network infrastructure should be investigated.
- C. Processing speed is too slow.
- D. New test data is needed.
Answer: C
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 # 23
Which of the following is a typical performance risk associated with distributed architectures?
- A. Unreliable or unpredictable remote servers
- B. Excess computer memory resources
- C. Inconsistent Bluetooth connectivity
- D. A local hard disk that has been de-fragmented
Answer: A
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 # 24
Why is it important to specify how failures are handled during test execution?
- A. To ensure all defects are captured
- B. To ensure that new failures are not introduced
- C. To minimize distractions during testing
- D. To meet the expectations of the business stakeholders
Answer: B
Explanation:
During performance testing, it is crucial to define failure handling procedures to ensure that failures do not introduce additional errors into the test execution process. This helps maintain test accuracy and avoid misleading results.
Option A (Meeting stakeholder expectations) is important but not the primary reason for defining failure handling.
Option C (Capturing all defects) is a general testing principle, not specific to failure handling in performance tests.
Option D (Minimizing distractions) is not a valid reason for defining failure handling.
NEW QUESTION # 25
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 test plan that includes specific technical specifications for the computing hardware to be used for performance testing
- B. Established HTTP response per second goals that will have acceptable minimum, maximum, and average response times
- C. A comprehensive list of support staff to be available during performance testing, including key members of the application development team
- D. The risks that may exist due to platform differences between the test environment and the production environment
Answer: D
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 # 26
Which of the following is considered a common web service protocol?
- A. SOAK
- B. REST
- C. RTE
- D. HTTP
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 # 27
At what point during performance testing does monitoring with the load testing tool begin?
- A. Immediately after test execution.
- B. When testing is concluded.
- C. Simultaneously with test execution.
- D. Before testing execution.
Answer: C
Explanation:
Performance monitoring must begin simultaneously with test execution to capture system behavior in real-time. This ensures that bottlenecks and performance issues are identified immediately.
Option A (After testing is concluded) is incorrect because historical monitoring does not help in real-time analysis.
Option B (Before execution) is incorrect because monitoring needs active system load to measure performance.
Option C (Immediately after execution) is incorrect because it misses runtime metrics.
NEW QUESTION # 28
Which of the following is considered a characteristic of stress testing?
- A. It focuses on the system's ability to handle transactions over a specific timeframe.
- B. It determines the maximum number of transactions a system can handle.
- C. It evaluates the system's ability to handle loads beyond its design limits.
- D. Considers the system's ability to recover from a sudden increase of loads within the system's limits.
Answer: C
Explanation:
Stress testing is designed to evaluate how a system behaves under extreme conditions, often exceeding its design limitations. The goal is to identify bottlenecks, memory leaks, and failures that occur beyond normal operating conditions.
Option A is incorrect because it refers to resilience testing, which focuses on recovery rather than stress beyond limits.
Option B is incorrect as it describes load testing, which measures performance under expected loads.
Option C is incorrect since determining the maximum transactions is a feature of capacity testing, not stress testing.
NEW QUESTION # 29
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