Data Flow Analysis CTAL-TTA Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Why is dynamic data flow analysis challenging in large systems?

   • AIt is only applicable to embedded systems
   • BIt cannot be automated
   • CIt only covers the paths executed by the test cases
   • DIt requires the code to be compiled with special flags
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2. 12foundation · easy

   In data flow testing, what does a test case need to cover?

   • AAll possible combinations of input values
   • BEvery branch in the code
   • CA specific def-use pair
   • DEvery function call
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4. 13expert · hard

   A test team is using a static data flow analysis tool on a codebase that heavily uses function pointers and callbacks. The tool reports many potential uninitialized variable anomalies, but the team believes the code is correct. What is the most likely reason for the false positives?

   • AThe tool is not designed for static analysis
   • BThe team is not providing enough test cases
   • CThe tool is correctly reporting real anomalies that the team is ignoring
   • DThe tool cannot determine which function is called through a pointer, so it may miss definitions that occur in called functions
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5. 14application · medium

   A test team is comparing static and dynamic data flow analysis tools. They have a function with a variable that is defined in a rarely executed branch. Which statement about the two approaches is correct?

   • AStatic analysis can detect the definition and its uses without executing the branch, while dynamic analysis may miss it if the branch is not executed
   • BBoth static and dynamic analysis will detect the definition regardless of execution
   • CNeither static nor dynamic analysis can detect the definition because it is in a rarely executed branch
   • DDynamic analysis can detect the definition and its uses without executing the branch, while static analysis may miss it
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6. 15application · medium

   A test analyst is designing test cases for a function with a loop. The variable `sum` is defined before the loop and used inside the loop. To achieve all-uses coverage for this variable, what must the test cases do?

   • AExecute the loop with different data values to test all branches
   • BExecute the loop at least once so the definition reaches the use
   • CExecute the loop zero times to test the boundary
   • DExecute the loop multiple times to cover all iterations
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