Computer 9th Chap 3 : Topic 5.6 - Maryam Publications

Computer Chapter 3 : Topic 5.6

Set breakpoints to debug code

1 / 9

A student is debugging a JavaScript program and wants to stop execution at a specific line to observe variable behavior. What is the primary purpose of setting a breakpoint in this scenario?

A) To automatically fix syntax mistakes

B) To convert code into optimized format

C) To pause execution at a specific line for inspection

D) To permanently remove errors from code

2 / 9

While using browser developer tools, a student clicks on a line number to set a breakpoint in JavaScript code. What will most likely happen during execution?

A) The function will not run at all

B) Execution will pause when that line is reached

C) The program will skip that line completely

D) The code will be deleted automatically

3 / 9

A programmer sets a breakpoint inside a loop to observe how an array value changes on each iteration. What is the main benefit of this approach?

A) It converts loop into condition

B) It increases execution speed

C) It allows step-by-step inspection of repeated execution

D) It removes the need for arrays

4 / 9

Why is setting a breakpoint more effective than using multiple console.log() statements in complex JavaScript programs?

A) It removes all variables automatically

B) It prevents loops from running

C) It converts JavaScript into HTML

D) It allows controlled pausing without modifying code repeatedly

5 / 9

A student places a breakpoint before a conditional statement in JavaScript. What is the main purpose of doing this?

A) To speed up browser rendering

B) To check variable values before decision-making occurs

C) To delete the condition automatically

D) To stop the program from executing conditions

6 / 9

When debugging a JavaScript function, a breakpoint is set at the first line inside the function. What does this allow the programmer to observe?

A) Browser memory usage only

B) Initial parameter values and execution flow

C) CSS properties of the page

D) Only final output result

7 / 9

A student notices that a program behaves incorrectly only after a loop runs multiple times. Where should a breakpoint be most effectively placed?

A) Inside the loop body

B) In CSS file only

C) In HTML title tag

D) Outside the script file

8 / 9

What is the key advantage of setting multiple breakpoints in different sections of a JavaScript program?

A) It disables function execution

B) It helps track execution flow across multiple logical parts

C) It increases program size

D) It removes all runtime errors automatically

9 / 9

A programmer sets a breakpoint but the code still runs without stopping. What is the most likely reason?

A) JavaScript is permanently disabled

B) The browser ignores all functions

C) The debugger tool is not active or properly started

D) Breakpoints only work in CSS files

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