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

Answer & Solution

Answer: Option // This is a comment
Solution:
Single-line comments in JavaScript start with //.
Related Questions on Average

Can you use comments to include documentation for functions and variables in JavaScript?

A). Yes

B). No

C). Only for functions

D). Only for variables

What happens if you include a comment within a string in JavaScript?

A). The comment will be executed as code

B). The comment will be ignored by the interpreter

C). The comment will be treated as part of the string

D). It will cause a syntax error

Which of the following is ignored by the JavaScript interpreter?

A). Variable declarations

B). Function definitions

C). Comments

D). Keywords

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

A). /* Comment */

B). // Comment

C).

D). # Comment

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).

How can you temporarily disable a piece of code without deleting it?

A). By commenting it out using /* */ or //

B). By placing it in a string

C). By removing it from the file

D). By placing it in a function

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).

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

C). To make the code easier to understand for others

D). To increase code execution speed

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

Why should comments be clear and concise?

A). To avoid confusion

B). To ensure they are ignored by the interpreter

C). To make them look professional

D). To make them longer