ISQI CTFL-PT 問題集

質問 1：
You have been asked to test the performance of a software and system update to a North American mobile trivia quiz game application.The quiz app is available on major app stores serving English-speaking users.The number of concurrent users planned for is 5 million Winning quiz participants are promised a share of an allocated cash prize Once participants start playing, their quiz sessions must not be lost especially if all previous questions were answered correctly. The application owner wants to ensure that 99% of quiz sessions are maintained (up to 4 95 million sessions) until the last answer has been successfully recorded What is the best way to address the performance testing for concurrency?
A. Conduct a network assessment of popular mobile data providers to ensure excessive frame loss and latency do not cause more than 15% of trivia answer arrivals to occur outside acceptable arrival time.
B. Conduct performance tests on production systems while there are no active quiz events
C. Enable and schedule the quiz app to act as a virtual user on users' mobile devices while the production system is in-between quiz events. This will ensure realistic end-to-end testing
D. Review the asynchronous session management algorithm, review the production systems implementation including load balancing and m-memory database schema, and conduct performance tests on these production systems while there are no active quiz events.
正解：D

質問 2：
Server virtualization has improved deployment speed and operating-cost efficiency for many IT applications.
Which of thefollowing architectures are verylikely to utilize server virtualization that potentially suffers from performance challenges related to common host hardware resources being burdened by virtualized servers unrelated to the application under performance test?
i Multi-tier System
ii. Mobile
iii.in Single Computer
iv.Distributed
v.Cloud-based
A. iii, iv, v true i, ii false
B. ii, iv, v true i, iii false
C. i, iv, v true ii, iii false
D. i, ii, iii true iv,iv false
正解：C

質問 3：
How does service virtualization contribute to the performance test environment?
A. Service virtualization allows the load generators to produce more load per virtual instance.
B. Service virtualization enables load balancers to operate in a distributed environment thereby creating a realistic emulation of a production environment when available system under test equipment is inferior to production.
C. Service virtualization enables the system under test to avoid functional error conditions caused by a necessary service being unavailable at the time of the performance test.
D. Service virtualization allows the database to perform as if it were loaded with a data set many times larger than is actually loaded
正解：C

質問 4：
Which of the following performance tests should we use to determine if an application meets performance expectations under typical realistic loads?
A. scalability test
B. spike test
C. load test
D. stress test
正解：D