JavaScript MCQs with answers Page - 18

Here, you will find a collection of MCQ questions on JavaScript. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Which of the following is the correct statement of WHILE loop start?

  • (A) while (i <= 10)
  • (B) while (i <= 10; i++)
  • (C) while i = 1 to 10
  • (D) None of These

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Q. What was the original name of JavaScript when it discovered?

  • (A) LiveScript
  • (B) EScript
  • (C) JScript
  • (D) Mocha

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Q. Which of the following is the correct way to write a comment in JavaScript code?

  • (A) //This is a comment
  • (B) /*This is a comment*/
  • (C) $This is a comment$
  • (D) **This is a comment**

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Q. What would be the output of the following Javascript code?

Code: 
var string1 = "Fee";  
var intvalue = 10000;  
alert( string1 + intvalue );
  • (A) Fee 10000
  • (B) 10000
  • (C) Fee10000
  • (D) Exception

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Q. Which of the following JavaScript operator is used to assign a value to a variable based on some condition?

  • (A) Assignment operator
  • (B) Bitwise Operator
  • (C) Conditional operator
  • (D) Logical Operator

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Q. Which of the following variables are used in JavaScript programs?

  • (A) Varying randomly
  • (B) Causing high-school algebra flashbacks
  • (C) Storing numbers, dates, or other values
  • (D) None of the above

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Q. What are the three crucial manipulations done in a "for loop" on a loop variable in JavaScript?

  • (A) The initialization, the Increment, and update
  • (B) The initialization, the test, and the update
  • (C) The initialization, the test, and Increment
  • (D) All of the above

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Q. What are the different alternatives of == and != in JavaScript?

  • (A) It uses bitwise checking
  • (B) It uses === and !== instead
  • (C) It uses equals() and notequals() instead
  • (D) It uses equalto()

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Q. Which of the following is a server-side JavaScript object?

  • (A) Date
  • (B) FileUpload
  • (C) File
  • (D) Function

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Q. What are the different types of errors in JavaScript?

  • (A) Load time errors
  • (B) Run time errors
  • (C) Logical Errors
  • (D) All of the above

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