JavaScript Strings

Question 1

What do template literals (template strings) allow in JavaScript?

Accepted Answer

String interpolation with `${}` and multi-line strings using backticks

Answer

Only multi-line strings

Answer

Automatic string escaping

Answer

Importing HTML templates

Question 2

What does `String.prototype.trim()` do?

Accepted Answer

Removes whitespace from the beginning and end of a string

Answer

Removes all whitespace from the string

Answer

Replaces multiple spaces with single spaces

Answer

Limits the string to a maximum length

Question 3

What does `String.prototype.split()` return?

Accepted Answer

An array of substrings divided by the separator

Answer

A string with the separator removed

Answer

A single character at the split position

Answer

A Set of unique parts

Question 4

What does `String.prototype.includes()` do?

Accepted Answer

Returns true if the string contains the given substring, otherwise false

Answer

Returns the index of the substring

Answer

Adds a substring to the string

Answer

Replaces a substring with another

Question 5

What does `String.prototype.replace()` do?

Accepted Answer

Replaces the first occurrence of a pattern (string or regex without `g` flag) with a replacement

Answer

Replaces ALL occurrences of a string or regex pattern

Answer

Removes a substring from the string

Answer

Replaces characters by position

Question 6

What is the difference between `String.prototype.slice()` and `String.prototype.substring()`?

Accepted Answer

`slice()` accepts negative indices; `substring()` treats negatives as 0

Answer

They are identical

Answer

`substring()` accepts negative indices; `slice()` does not

Answer

`slice()` is for arrays; `substring()` is for strings