JavaScript Strings Mockest | JavaScript

1.

How do you declare a string in JavaScript?

A). var str = 'Hello'; B). var str = "Hello"; C). var str = Hello; D). All of the above

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2.

Which method is used to find the length of a string?

A). length() B). len() C). size() D). length

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3.

How do you convert a string to uppercase in JavaScript?

A). toUpper() B). upperCase() C). toUpperCase() D). toCaps()

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4.

Which method would you use to check if a string contains a specified substring?

A). contains() B). includes() C). has() D). indexOf()

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5.

What does the charAt() method do?

A). Returns the ASCII value of a character B). Returns the Unicode value of a character C). Returns the character at a specified index D). Returns the first character in a string

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6.

How do you extract a part of a string in JavaScript?

A). slice() B). substring() C). substr() D). All of the above

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7.

What is the result of "Hello".concat(" ", "World")?

A). HelloWorld B). Hello World C). Hello, World D). HelloWorld

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8.

Which method would you use to replace a part of a string with another string?

A). replace() B). substitute() C). change() D). swap()

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9.

How do you trim whitespace from the beginning and end of a string?

A). trimStart() B). trim() C). trimWhitespace() D). strip()

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10.

What does the split() method do?

A). Splits a string into characters B). Splits a string into an array of substrings C). Divides a string into two parts D). Cuts a string in half

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JavaScript Strings Mocktest

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