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

Answer & Solution

Answer: Option Hello World!
Solution:
The comment after // is ignored by the interpreter, so the output will be 'Hello World!'.
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How do single-line comments improve code readability?

A). By adding extra executable code

B). By explaining complex logic

C). By increasing code length

D). By making code run faster

Why should comments be kept up-to-date with the code?

A). To ensure they do not cause syntax errors

B). To prevent the code from running

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What should you avoid when writing single-line comments?

A). Writing clear and concise comments

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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

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

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Which of the following single-line comments would be used to explain a variable declaration?

A). // Variable to store user age

B). /* Variable to store user age */

C).

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

A). It will be executed as code

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

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Why should comments be clear and concise?

A). To avoid confusion

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D). To make them look professional

What is the syntax for writing an inline comment in JavaScript?

A). # This is an inline comment

B). // This is an inline comment

C). /* This is an inline comment */

D).