Computer 9th Chap 3 : Topic 5.5 - Maryam Publications

Computer Chapter 3 : Topic 5.5

Invoke functions and check return values

1 / 5

A student writes a JavaScript function that returns the sum of two numbers and then calls it to display the result. What is the main purpose of invoking the function in this context?

A) To change HTML structure automatically

B) To delete unnecessary variables

C) To execute the function and verify its returned value

D) To convert code into loops

2 / 5

In JavaScript, a function calculateArea(length, width) returns a value. Which code correctly checks the returned result for correctness?

A) calculateArea = 10 * 5

B) function calculateArea(10, 5)

C) return calculateArea

D) console.log(calculateArea(10, 5))

3 / 5

A programmer invokes a function multiple times with different inputs and compares the returned outputs. What concept is being applied?

A) Random execution testing

B) Variable declaration only

C) HTML rendering

D) Functional verification through test cases

4 / 5

A student writes a function that returns a boolean value and then uses an if statement to check the result. What is being tested?

A) Correctness of the function’s return value

B) Browser loading speed

C) CSS styling behavior

D) Array length calculation

5 / 5

Why is it important to use function return values when testing JavaScript code instead of only printing inside the function?

A) It allows reusable and verifiable outputs for debugging

B) It makes the program slower

C) It removes the need for variables

D) It prevents execution errors completely

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