Part 5 "Testing of Software Characteristics" Which of the following is the best example of a reliability failure for the application? 1 credit [K2]

Question

Options

• ASlow response time
• BExcessive memory consumption
• CRandom application termination
• DFailure to encrypt data

• A
  2% (1)
• B
  2% (1)
• C
  92% (58)
• D
  5% (3)

Explanation

Random application termination (C) is a reliability failure because reliability measures a system's ability to perform its required functions consistently over time - an application that crashes unexpectedly has fundamentally failed to maintain operation, which is the core definition of unreliability.

Why the distractors are wrong:

• A (Slow response time) targets performance efficiency - the system is still functioning, just slowly.
• B (Excessive memory consumption) is also a performance efficiency issue, specifically resource utilization.
• D (Failure to encrypt data) is a security characteristic failure - the app keeps running, but violates a security requirement.

Memory tip: Think of reliability as "does it keep working without falling over?" If the app crashes or terminates without user action, that's a reliability problem. Performance, memory, and security are separate quality characteristics - reliability is specifically about staying up and running.

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