Data Flow Analysis CTAL-TTA Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A test analyst is using a dynamic data flow analysis tool to find anomalies in a legacy application. The tool instruments the code and records variable definitions and uses during test execution. Which anomaly can this approach detect that a purely static analysis might miss?

   • AA definition that is never used on any path
   • BA use of a variable that is uninitialized only on a specific execution path
   • CA variable that is defined but never used in the entire program
   • DA type mismatch in a variable assignment
   Reveal Solution Discussion Select an answer first
2. 2expert · hard

   A test team is using a static data flow analysis tool on a large legacy system with many global variables and complex pointer usage. The tool reports a high number of potential anomalies, but the team suspects many are false positives. What is the most likely reason for the false positives?

   • AThe tool is not designed for static analysis
   • BThe tool is reporting only real anomalies, and the team is misinterpreting them
   • CThe tool cannot accurately track definitions and uses through pointers and global variables
   • DThe team is not executing the code, so the tool cannot detect real anomalies
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   What is a def-use pair in data flow analysis?

   • AA definition and a use in different functions
   • BA pair of definitions for the same variable
   • CA pair of uses for the same variable
   • DA definition of a variable and a subsequent use of that definition
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   Which of the following best describes a 'definition' of a variable in data flow analysis?

   • AA statement that prints the variable's value
   • BA statement that declares the variable's type
   • CA statement that assigns a value to the variable
   • DA statement that reads the variable's value
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A developer is reviewing code that reads a configuration value into a variable `timeout` and then uses it in a network call. Later, the variable `timeout` is reassigned but never used again. Which data flow anomaly is present?

   • AIncorrect use
   • BUninitialized variable
   • CUnused definition (dead store)
   • DDefinition-use pair missing
   Reveal Solution Discussion Select an answer first