Single Line Comments Mockest | JavaScript

1.

How do you write a single-line comment in JavaScript?

A). # This is a comment B). // This is a comment C). /* This is a comment */ D).

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2.

Which of the following will be ignored by the JavaScript interpreter?

A). Variable declarations B). Function definitions C). Single-line comments D). Keywords

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3.

What will be the output of console.log("Hello World!"); // This is a comment?

A). Hello World! B). Syntax Error C). This is a comment D). Undefined

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4.

What is the purpose of single-line comments in code?

A). To add executable code B). To increase execution speed C). To explain and document the code D). To replace code

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5.

Which of the following is a valid single-line comment in JavaScript?

A). // This is a comment B). /* This is a comment */ C). D). # This is a comment

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6.

Can single-line comments be used to disable code temporarily?

A). Yes B). No C). Only in certain cases D). Only in multi-line comments

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7.

What happens if you place a single-line comment within a string in JavaScript?

A). It will be executed as code B). It will be treated as a comment C). It will be treated as part of the string D). It will cause a syntax error

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8.

How do you add a note to explain a line of code in JavaScript?

A). By adding a comment using // B). By using # C). By using /* ... */ D). By using

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9.

Which of the following is true about single-line comments in JavaScript?

A). They can contain other comments B). They cannot be used within functions C). They span multiple lines D). They end at the end of the line

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10.

Why should comments be clear and concise?

A). To avoid confusion B). To increase code execution speed C). To ensure they are ignored by the interpreter D). To make them look professional

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Single Line Comments Mocktest

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