Testing and Evaluation unit 2

Question 1

What is a logic error?

Answer 1

Where your program does something unexpected.

Question 2

What is a syntax error?

Answer 2

Where you’ve broken the rules of the language, like missing a bracket or keyword.

Question 3

What is a runtime error?

Answer 3

An error that happens while the program is running, such as dividing by zero or opening a missing file.

Question 4

What is a trace table used for?

Answer 4

To manually follow an algorithm step-by-step and track the values of variables at each stage.

Question 5

What should be included in a test plan?

Answer 5

Types of tests, test data, expected results, and how to tell if the program meets the requirements.

Question 6

What are the three main types of test data?

Answer 6

1. Normal data: data that is well within the limits of what should be accepted. e.g. Age = 25
2. Boundary data: data that is at the outer limits of what should be accepted (range). e.g. Age = 0 or Age = 120 (if 0–120 is valid)
3. Erroneous data: data that should not be accepted by the program. e.g. Age = -5 or Age = “twenty-five”

Question 7

Why is testing important?

Answer 7

To make sure the program works as expected and handles errors properly.

Question 8

How do you determine the value of a variable at a given point?

Answer 8

Use a trace table or follow the code step-by-step to see how the variable changes.

Question 9

What does it mean to evaluate a program?

Answer 9

To look at its strengths and weaknesses, and suggest improvements.

Question 10

Give one example of improving a program.

Answer 10

Use subprograms to reduce repetition, or add input validation for better error handling.