JavaScript MCQs with answers Page - 31

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. The statement a===b refers to

  • (A) Both a and b are equal in value, type and reference address
  • (B) Both a and b are equal in value
  • (C) Both a and b are equal in value and type
  • (D) There is no such statement

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Q. Assume that we have to convert “false” that is a non-string to string. The command that we use is (without invoking the “new” operator)

  • (A) false.toString()
  • (B) String(false)
  • (C) String newvariable=”false”
  • (D) Both false.toString() and String(false)

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Q. Consider the following snippet code

Code: 
var string1 = ”123”;
 var intvalue = 123;
 alert( string1 + intvalue );
  • (A) 123246
  • (B) 246
  • (C) 123123
  • (D) Exception

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Q. The JavaScript’s syntax calling ( or executing ) a function or method is called

  • (A) Primary expression
  • (B) Functional expression
  • (C) Invocation expression
  • (D) Property Access Expression

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Q. Cost for Using JavaScript in your HTML is

  • (A) Its Free !!!
  • (B) $10 / Year
  • (C) $15 / Year
  • (D) $5 / Year

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Q. JavaScript Code is written inside file having extension

  • (A) .jvs
  • (B) .javascript
  • (C) .js
  • (D) .jsc

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Q. Why JavaScript is called as Lightweight Programming Language ?

  • (A) because JS is available free of cost
  • (B) because JS is client side scripting
  • (C) because we can add programming functionality inside JS
  • (D) because JS can provide programming functionality inside but up to certain extend.

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Q. JavaScript is also called as

  • (A) Server Side Scripting Language
  • (B) Browser Side Scripting Language
  • (C) Client Side Scripting Language
  • (D) Both B and C

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Q. Local Browser used for validations on the Web Pages uses __________.

  • (A) Java
  • (B) HTML
  • (C) CSS
  • (D) JS

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Q. The main purpose of a “Live Wire” in NetScape is to

  • (A) Create linkage between client side and server side
  • (B) Permit server side, JavaScript code, to connect to RDBMS
  • (C) Support only non relational database
  • (D) To interpret JavaScript code

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