11. Debugging

Question 1

Bug

Answer 1

Cause of a problem in a program

Question 2

Debugging

Answer 2

Process of troubleshooting bugs

Question 3

Visual Inspection

Answer 3

• Basic debugging process
• Looking at each statement one-by-one to try to find a bug.
• For each statement, this process has the hypothesis: This statement has a bug.
• The test is a visual inspection of the statement.
• If a bug is found, the hypothesis is validated. If not, the result in inconclusive (the error has been unnoticed).

Question 4

Debug Output Statement

Answer 4

• Output helps determine whether the preceding statement has the bug

Question 5

Hierarchical debugging

Answer 5

• For larger programs
• may divide the statements into regions, and insert one debug output statement after each region
• Commonly a programmer strives to find regions of related statements