Free CTFL-PT: ISTQB Certified Tester Foundation Level-Performance Testing Exam Questions and Answers

Which performance test type is intended to evaluate how a system behaves when the workload reaches or exceeds its anticipated peak, or when available resources such as memory are reduced?

• AA. Load testing
• BB. Endurance testing
• CC. Stress testing
• DD. Scalability testing

A ticketing company is about to sell tickets for a concert tour in three countries. Stakeholders want to see the experience of real customers using their own handsets over their own mobile carrier networks in each country. They accept that the exact load profile cannot be tightly controlled. Which of the following load generation approaches BEST meets this need?

• AA. UI-level scripts driving emulated handsets in one data centre
• BB. Crowd-based load generation using real users on their own devices
• CC. API-level calls issued by a harness inside the test environment
• DD. Protocol-level virtual users run from a single laboratory

A utility company's customer portal normally serves about 200 concurrent users. Each time the company sends a billing reminder e-mail, the number of users rises to about 5,000 within one minute and falls back to normal after ten minutes. The test manager wants to know how the portal copes with and recovers from these surges. Which of the following performance test types is MOST appropriate?

• AA. Capacity testing
• BB. Endurance testing
• CC. Spike testing
• DD. Concurrency testing

Monitoring of an order service shows that 108,000 transactions were completed during a one-hour steady-state period. Which of the following metrics can be calculated from this information alone?

• AA. Throughput of 30 transactions per second
• BB. Peak concurrency of 30 virtual users
• CC. Error rate of 3 percent
• DD. Average response time of 33 ms

A tester wants to check that many users who update the same customer record at the same moment do not cause deadlocks, lock contention or lost updates. Which of the following testing types is being used?

• AA. Concurrency testing
• BB. Capacity testing
• CC. Load testing
• DD. Spike testing

A Java order-processing service has to be restarted every few days because heap usage grows steadily. A fix has been made, and the team wants to confirm that memory use now stays stable. Which of the following performance test types is MOST appropriate?

• AA. Stress testing
• BB. Endurance testing
• CC. Scalability testing
• DD. Spike testing

Which of the following is a performance risk typically associated with mobile applications?

• AA. Contention for a single shared database across several client sites
• BB. Lack of control over the order in which batch jobs are scheduled
• CC. Failure to complete processing within hard real-time deadlines
• DD. Excessive battery drain and data usage caused by frequent network calls

During a 12-hour endurance test of a claims processing application at constant load, average response time rises slowly from 1.2 seconds to 6.8 seconds. Late in the run, the application server starts logging out-of-memory errors and then restarts. Heap usage grew steadily throughout the test and did not fall after garbage collection cycles. CPU utilisation stayed below 40% and network utilisation was low. Which of the following is the MOST likely cause of this failure mode?

• AA. A connection pool configured with too few connections for the applied load
• BB. Think times in the test script set too short compared with the operational profile
• CC. Objects not being released by the application code, causing a memory leak
• DD. Insufficient network bandwidth between the load generators and the application server

A performance tester is reviewing the structure of a script for a retail web application. Which TWO of the following activities are typically performed in the termination (clean-up) section of the script? (Select TWO options!)

Select 2 answers.

• AA. Logging the virtual user out of the application
• BB. Setting the target server name and port number for the run
• CC. Reading the first row of the parameter data file
• DD. Starting the timer for the checkout transaction
• EE. Closing the connections that the script opened during execution

Which type of performance testing evaluates how a system behaves when the load suddenly increases sharply for a short period and then returns to its previous level?

• AA. Capacity testing
• BB. Endurance testing
• CC. Concurrency testing
• DD. Spike testing