Learn JavaScript MCQ Questions with answers and solutions.

A

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Q. See the given code of JavaScript and choose the correct output from the following

Code:

var string1 = "40";  
varvalueinit=50;  
alert( string1 +intvalue);

(A) 4090
(B) 90
(C) 4050
(D) Exception

A

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Q. In JavaScript, what will be used for calling the function definition expression

(A) Function prototype
(B) Function literal
(C) Function calling
(D) Function declaration

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Q. Which of the following one is the property of the primary expression

(A) Contains only keywords
(B) basic expressions containing all necessary functions
(C) contains variable references alone
(D) stand-alone expressions

A

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Q. Consider the following snippet of JavaScript code:
Which one of the following statement is most suitable to check if the pattern matches with the sting "text".

Code:

var text ="testing: 1, 2, 3";// Sample text  
var pattern =/d+/g// Matches all instances of one or more digits.

(A) test(text)
(B) equals(pattern)
(C) test(pattern)
(D) text==pattern

A

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Q. Which one of the following is used for the calling a function or a method in the JavaScript:

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

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Q. The "new Point(3,2)", is a kind of _______ expression

(A) Object Creation Expression
(B) Primary Expression
(C) Invocation Expression
(D) Constructor Calling Expression

A

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Q. Which one of the following operator is used to check weather a specific property exists or not:

(A) Exists
(B) exist
(C) within
(D) in

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Q. Which one of the following is an ternary operator:

(A) ?
(B) ;
(C) -
(D) +

A

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Q. "An expression that can legally appear on the left side of an assignment expression." is a well known explanation for variables, properties of objects, and elements of arrays. They are called_____

(A) Properties
(B) Prototypes
(C) Definition
(D) Lvalue

A

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Q. Which of the following is the correct output for the following JavaScript code:

Code:

function display1(option)  
{  
    return(option ?  "true" :  "false");  
}  
    bool ans=true;  
console.log(display1(ans));

(A) False
(B) True
(C) Runtime error
(D) Compilation error

JavaScript MCQs with answers Page - 10

Q. See the given code of JavaScript and choose the correct output from the following

Q. In JavaScript, what will be used for calling the function definition expression

Q. Which of the following one is the property of the primary expression

Q. Consider the following snippet of JavaScript code:
Which one of the following statement is most suitable to check if the pattern matches with the sting "text".

Q. Which one of the following is used for the calling a function or a method in the JavaScript:

Q. The "new Point(3,2)", is a kind of _______ expression

Q. Which one of the following operator is used to check weather a specific property exists or not:

Q. Which one of the following is an ternary operator:

Q. "An expression that can legally appear on the left side of an assignment expression." is a well known explanation for variables, properties of objects, and elements of arrays. They are called_____

Q. Which of the following is the correct output for the following JavaScript code:

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JavaScript MCQs with answers Page - 10

Q. See the given code of JavaScript and choose the correct output from the following

Q. In JavaScript, what will be used for calling the function definition expression

Q. Which of the following one is the property of the primary expression

Q. Consider the following snippet of JavaScript code: Which one of the following statement is most suitable to check if the pattern matches with the sting "text".

Q. Which one of the following is used for the calling a function or a method in the JavaScript:

Q. The "new Point(3,2)", is a kind of _______ expression

Q. Which one of the following operator is used to check weather a specific property exists or not:

Q. Which one of the following is an ternary operator:

Q. "An expression that can legally appear on the left side of an assignment expression." is a well known explanation for variables, properties of objects, and elements of arrays. They are called_____

Q. Which of the following is the correct output for the following JavaScript code:

Add MCQ in this Category

Browse Categories

Q. Consider the following snippet of JavaScript code:
Which one of the following statement is most suitable to check if the pattern matches with the sting "text".