JavaScript String Operators Mockest | JavaScript

11.

What is the result of 'Hello'.substring(0, 3) in JavaScript?

A). 'Hell' B). 'Hello' C). 'o' D). 'llo'

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12.

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

A). string.trim() B). trimString(string) C). string.strip() D). trim(string)

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13.

What is the result of 'apple'.charAt(2) in JavaScript?

A). 'p' B). 'l' C). 'a' D). 'pp'

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14.

How do you get the index of the first occurrence of a specified substring in a string?

A). string.indexOf(substring) B). string.index(substring) C). substring.positionIn(string) D). string.search(substring)

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15.

What does the .replace() method do in JavaScript?

A). Replaces a specified value with another value B). Removes a substring C). Splits a string into an array D). Joins two or more strings

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16.

How do you extract parts of a string and join them together in JavaScript?

A). string.slice(start, end) B). string.extract(start, end) C). string.split(start, end) D). string.join(start, end)

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17.

What is the result of 'hello'.toUpperCase().toLowerCase() in JavaScript?

A). 'hello' B). 'HELLO' C). 'Hello' D). 'hello'

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18.

How do you check if a string starts with a specific substring in JavaScript?

A). string.startsWith(substring) B). string.startsWithWith(substring) C). string.beginsWith(substring) D). string.starts(substring)

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19.

What does the .substring() method do in JavaScript?

A). Extracts characters between two indices B). Trims whitespace from the beginning C). Converts string to an array D). Compares two strings

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20.

How do you extract a part of a string and replace it with another substring in JavaScript?

A). string.replace(oldSubstring, newSubstring) B). string.extractReplace(old, new) C). string.modify(old, new) D). string.substitute(old, new)

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