JavaScript Comments Mockest | JavaScript

1.

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

A). /* Comment */ B). // Comment C). D). # Comment

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2.

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

A). B). /* Comment */ C). // Comment D). # Comment

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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.

Which of the following is ignored by the JavaScript interpreter?

A). Variable declarations B). Function definitions C). Comments D). Keywords

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5.

How can comments help in debugging JavaScript code?

A). By executing commented code B). By providing explanations C). By ignoring parts of the code D). By highlighting errors

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6.

What is the purpose of 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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7.

How can you comment out a block of code in JavaScript?

A). Using // at the beginning of each line B). Using /* at the start and */ at the end C). Enclosing the code in {} D). Using

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8.

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

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

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9.

Can comments be nested in JavaScript?

A). Yes B). No C). Only single-line comments can be nested D). Only multi-line comments can be nested

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10.

How do you comment out the rest of a line after a statement in JavaScript?

A). /* rest of line */ B). # rest of line C). // rest of line D).

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JavaScript Comments Mocktest

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