Podcast
Questions and Answers
What is the primary purpose of a Control Flow Graph (CFG)?
What is the primary purpose of a Control Flow Graph (CFG)?
- To visualize the user interface of a program
- To describe the control structures of a program (correct)
- To model the data structures of a program
- To optimize the performance of a program
What is a Basic Block in a Control Flow Graph?
What is a Basic Block in a Control Flow Graph?
- A sequence of statements with no branches (correct)
- A single statement that controls the program flow
- A sequence of statements with multiple branches
- A group of statements that are never executed
What does an edge in a Control Flow Graph represent?
What does an edge in a Control Flow Graph represent?
- A program input
- A transfer of control (correct)
- A statement or sequence of statements
- A data structure
What is the purpose of annotating a Control Flow Graph with extra information?
What is the purpose of annotating a Control Flow Graph with extra information?
What is the main difference between an if-else structure and an if structure without an else?
What is the main difference between an if-else structure and an if structure without an else?
What is the primary application of Graph Coverage?
What is the primary application of Graph Coverage?
What is the chapter of the textbook that covers Graph Coverage?
What is the chapter of the textbook that covers Graph Coverage?
What is the name of the authors of the textbook 'Introduction to Software Testing'?
What is the name of the authors of the textbook 'Introduction to Software Testing'?
In a CFG, what is the purpose of adding 'extra' nodes?
In a CFG, what is the purpose of adding 'extra' nodes?
Which type of loop structure has an implicit initialization?
Which type of loop structure has an implicit initialization?
What is the condition for the while loop to terminate?
What is the condition for the while loop to terminate?
What is the purpose of the return statement in a CFG?
What is the purpose of the return statement in a CFG?
What is the purpose of the dummy node in a CFG?
What is the purpose of the dummy node in a CFG?
In a CFG, what type of edges are not allowed?
In a CFG, what type of edges are not allowed?
What is the purpose of the incremental statement in a loop?
What is the purpose of the incremental statement in a loop?
What is the difference between a do-while loop and a while loop?
What is the difference between a do-while loop and a while loop?
What is the purpose of the print statement in a CFG?
What is the purpose of the print statement in a CFG?
What is the purpose of the function call in the loop body?
What is the purpose of the function call in the loop body?
Study Notes
Graph Coverage for Source Code
- A control flow graph (CFG) models all executions of a program by describing control structures.
- In a CFG, nodes represent statements or sequences of statements (basic blocks), and edges represent transfers of control.
- A basic block is a sequence of statements where if the first statement is executed, all statements will be (no branches).
- CFGs can be annotated with extra information.
Control Flow Graphs for if Statements
- In an if-else structure, CFG nodes are created for each branch.
- If there is no else clause, CFG nodes are still created to ensure proper control flow.
Control Flow Graphs for Loops
- Loops require additional nodes to be added to the CFG, which do not represent statements or basic blocks.
- In a while loop structure, a dummy node is added to ensure proper control flow.
- For loop structures, nodes are implicitly created to handle initialization and incrementation.
- Do-while loop structures also require additional nodes for proper control flow.
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Description
This quiz covers chapters 7.3-7.6 of the 2nd edition of 'Introduction to Software Testing' by Paul Ammann and Jeff Offutt, focusing on graph coverage. It's designed for the SWE 202 course.
