50+ Asked JavaScript Interview Questions and Answers (2024)

質問 1. What are JavaScript data types?

Number
String
Boolean
Function
Object
Null
Undefined.

質問 2. How do you convert numbers between different bases in JavaScript?

Use the parseInt() function, that takes a string as the first parameter, and the base as a second parameter. So to convert hexadecimal 3F to decimal, use parseInt ("3F", 16);

質問 3. What does isNaN function do?

Return true if the argument is not a number.

Example:

isNaN(123) //returns false

isNaN('Hello John') //returns true

質問 4. What looping structures are there in JavaScript?

Looping structures are:

for
while
do-while
foreach

質問 5. What boolean operators does JavaScript support?

Boolean operators in JavaScript are:

&&
||
!

集中型学習パス、模擬テスト、面接向けコンテンツでスキルを伸ばしましょう。

JavaScript 面接の質問と回答

関連する比較

質問 1. What are JavaScript data types?

質問 2. How do you convert numbers between different bases in JavaScript?

質問 3. What does isNaN function do?

質問 4. What looping structures are there in JavaScript?

質問 5. What boolean operators does JavaScript support?

WithoutBook