iSQI CTFL-PT_D ISTQB Certified Tester Foundation Level - Specialist Performance Testing Exam Practice Test

Direct measurement through a performance monitoring tool is the most effective mechanism for extracting metrics associated with deadlocks and multithreading problems. These tools can provide real-time insights into the system’s performance, highlighting issues such as thread contention, deadlocks, and resource bottlenecks. ISTQB performance testing principles advocate the use of specialized monitoring tools to capture detailed performance metrics, facilitating the identification and resolution of complex multithreading issues.

When preparing a presentation for business stakeholders, it is essential to focus on high-level objectives and outcomes that align with business goals. In the context of performance testing, the stakeholders are primarily concerned with ensuring that the system can handle peak loads and maintain operational integrity.

Option Atalks about the setup of the test environment and the logistics of passenger data, which is too technical for business stakeholders.

Option Bfocuses on budget and timeline, which are relevant but do not directly address the performance test's purpose and objectives.

Option Cclearly states the purpose of the performance test (spike test) and its objective, which is to verify that the system can support concurrent request peaks, directly aligning with business interests.

Option Dagain focuses on technical details about the test environment setup, which is not the primary concern for business stakeholders.

Therefore, Option C is the most appropriate choice as it succinctly communicates the performance test's objective and its relevance to business operations.

In the testing process, specific test conditions for performance testing are identified during the Test Analysis phase. This phase involves reviewing and analyzing the test basis, such as requirements, architecture, and design, to identify the test conditions, which are the items or events of a component or system that could be verified by one or more test cases.

References:

ISTQB Foundation Level Syllabus

ISTQB Glossary

Spike testing involves subjecting a system to a significant increase in load for short periods of time to determine if it can handle sudden spikes in traffic. Emily's scenario of testing a system's responseto a high number of concurrent users during specific periods and then returning to a stable state fits the description of spike testing.

References:

ISTQB Performance Testing Syllabus

ISTQB Glossary

To calculate the number of departing passengers accessing the front-end only once to check in per hour, we follow these steps:

Total Departing Passengers in January:

465,000 passengers transported throughout January.

Duration of Operations in January:

Operating hours: 07:00 to 23:00, which equals 16 hours per day.

Total days in January: 31 days.

Total operating hours in January: 31 days * 16 hours/day = 496 hours.

Passengers Per Hour:

Total passengers: 465,000.

Total hours of operation: 496 hours.

Passengers per hour: 465,000 passengers / 496 hours = 937.5 passengers/hour.

Passengers Accessing Only Once for Check-In:

30% of departing passengers reconnect for a boarding pass, which means 70% access only once.

Passengers accessing only once: 70% of 937.5 passengers/hour = 0.70 * 937.5 = 656.25 passengers/hour.

Given the available options, the closest correct value isC. 625.00 departing passengers / hour.

To calculate the minimum front-end processing capacity, we need to account for the peak and off-peak transactions:

Peak Transactions:

Assume 12 peak periods per hour.

During peak times, the transaction rate is 100 transactions/minute.

Off-Peak Transactions:

There are 60 - 12 = 48 minutes of off-peak periods per hour.

Off-peak transaction rate is 10.42 transactions/minute.

Total Transactions Per Hour:

Peak transactions: 12 * 100 = 1,200 transactions.

Off-peak transactions: 48 * 10.42 = 500.16 transactions.

Total transactions per hour: 1,200 + 500.16 = 1,700.16 transactions/hour.

Thus, the correct answer isD. 100 * 12 + (60 - 12) * 10.42 = 1,700.16 transactions/hour.

Generating load through the User Interface (UI) is essential to replicate a real production environment accurately. This approach simulates real user interactions with the system, providing a more realistic assessment of how the system performs under actual usage conditions. According to ISTQB standards, using the UI to generate load helps identify performance issues that users might experience, ensuring that the test results are relevant and actionable.

Endurance testing, also known as soak testing, evaluates the stability and performance of a system over an extended period under a significant load. This type of testing is designed to identify issuessuch as memory leaks, resource depletion, and other long-term stability problems that may not be evident in shorter testing durations. According to ISTQB guidelines, endurance testing is essential for ensuring that the system can maintain performance and stability over time, especially in operational contexts.

Creating a baseline for maximum attendance helps ensure that the system can handle peak loads. This baseline acts as a reference point for performance testing, allowing James to simulate and measure the system's behavior under expected peak conditions. By doing this, he can verify that the system meets the performance target of handling 150 users per minute within the specified time constraints. Establishing such baselines is a fundamental practice in performance testing, as emphasized by the ISTQB guidelines.

A transaction in performance testing involves a series of actions that need to be completed to ensure data consistency and correctness. Option D captures the complete and atomic nature of a transaction by ensuring that both the reduction in account K and the increase in account P are correctly applied before committing the changes. This reflects the principles of ACID (Atomicity, Consistency, Isolation, Durability) in database transactions, which are crucial for ensuring reliability and correctness in financial operations as covered in ISTQB performance testing standards.

To determine the number of virtual users necessary for the performance test:

Total Transactions Needed:

11,700 transactions are required to simulate the operation.

Conditions of Operations:

The simulation should reflect the realistic load of departing passengers accessing the front-end application.

Virtual Users:

The number of virtual users required is equal to the total number of transactions to be generated in the test since each virtual user performs one transaction.

Thus, the correct answer isB. 11,700virtual users will be necessary to achieve the specified number of transactions under the given conditions.

The scope of performance testing is established during the test planning phase. During this phase, testers define the objectives, resources, schedule, and scope of the testing activities. This includes identifying the specific performance requirements, determining the test environment, and outlining the test strategy. According to ISTQB guidelines, effective test planning ensures that the performance testing efforts are aligned with the project goals and stakeholder expectations, setting a clear direction for subsequent testing activities.