Learn JavaScript MCQ Questions with answers and solutions.

A

Admin • 833K Points
Coach

Q. The enumeration order becomes implementation dependent and non-interoperable if :

(A) If the object inherits enumerable properties
(B) The object does not have the properties present in the integer array indices
(C) The delete keyword is never used
(D) Object.defineProperty() is not used

A

Admin • 833K Points
Coach

Q. Consider the following snippet code
var string1 = ”123”;
var intvalue = 123;
alert( string1 + intvalue );
The result would be

(A) 123246
(B) 246
(C) 123123
(D) Exception

A

Admin • 833K Points
Coach

Q. A function definition expression can be called

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

Show Answer Discuss Share

A

Admin • 833K Points
Coach

Q. The property of a primary expression is

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

Show Answer Discuss Share

A

Admin • 833K Points
Coach

Q. Consider the following statements
var text = "testing: 1, 2, 3"; // Sample text
var pattern = /d+/g // Matches all instances of one or more digits
In order to check if the pattern matches with the string “text”, the statement is

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

A

Admin • 833K Points
Coach

Q. Which of the operator is used to test if a particular property exists or not?

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

A

Admin • 833K Points
Coach

Q. Among the following, which one is a ternary operator?

(A) +
(B) :
(C) –
(D) ?:

A

Admin • 833K Points
Coach

Q. JavaScript is a _______________ language

(A) Object-Oriented
(B) High-level
(C) Assembly-language
(D) Object-Based

A

Admin • 833K Points
Coach

Q. A proper scripting language is a

(A) High level programming language
(B) Assembly level programming language
(C) Machinen level programming language
(D) Low level programming language

A

Admin • 833K Points
Coach

Q. What will be the reaction when a catch clause has no conditionals ?

(A) Takes it to be 0
(B) Takes it to be 1
(C) Takes it to be true
(D) Takes it to be false

JavaScript MCQs with answers Page - 71

Q. The enumeration order becomes implementation dependent and non-interoperable if :

Q. Consider the following snippet code
var string1 = ”123”;
var intvalue = 123;
alert( string1 + intvalue );
The result would be

Q. A function definition expression can be called

Q. The property of a primary expression is

Q. Consider the following statements
var text = "testing: 1, 2, 3"; // Sample text
var pattern = /d+/g // Matches all instances of one or more digits
In order to check if the pattern matches with the string “text”, the statement is

Q. Which of the operator is used to test if a particular property exists or not?

Q. Among the following, which one is a ternary operator?

Q. JavaScript is a _______________ language

Q. A proper scripting language is a

Q. What will be the reaction when a catch clause has no conditionals ?

Add MCQ in this Category

Browse Categories

JavaScript MCQs with answers Page - 71

Q. The enumeration order becomes implementation dependent and non-interoperable if :

Q. Consider the following snippet code var string1 = ”123”; var intvalue = 123; alert( string1 + intvalue ); The result would be

Q. A function definition expression can be called

Q. The property of a primary expression is

Q. Consider the following statements var text = "testing: 1, 2, 3"; // Sample text var pattern = /d+/g // Matches all instances of one or more digits In order to check if the pattern matches with the string “text”, the statement is

Q. Which of the operator is used to test if a particular property exists or not?

Q. Among the following, which one is a ternary operator?

Q. JavaScript is a _______________ language

Q. A proper scripting language is a

Q. What will be the reaction when a catch clause has no conditionals ?

Add MCQ in this Category

Browse Categories

Q. Consider the following snippet code
var string1 = ”123”;
var intvalue = 123;
alert( string1 + intvalue );
The result would be

Q. Consider the following statements
var text = "testing: 1, 2, 3"; // Sample text
var pattern = /d+/g // Matches all instances of one or more digits
In order to check if the pattern matches with the string “text”, the statement is