JavaScript MCQs with answers Page - 9

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

Code: 
functioncomparing()  
{  
intx=9;  
chary=9;  
if(x==y)  
returntrue;  
else  
returnfalse;  
}
  • (A) compilation error
  • (B) false
  • (C) runtime error
  • (D) true

A

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Q. What will be the output of the following JavaScript code?

Code: 
functioncomparison()  
{  
int number=10;  
if(number==="10")  
returntrue;  
else  
returnfalse;  
}
  • (A) True
  • (B) false
  • (C) runtime error
  • (D) compilation error

A

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Q. Find out the correct output of the following given piece of code from the given options:

Code: 
functionfun()  
{  
int y=10;  
char z=10;  
if(y.tostring()===z)  
returntrue;  
else  
returnfalse;  
}
  • (A) logical error
  • (B) false
  • (C) runtime error
  • (D) true

A

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Q. What is the basic purpose of the "toLocateString()" method?

  • (A) It returns a localised object representation
  • (B) It returns a localized string representation of the object
  • (C) It return a local time in the string format
  • (D) It return a parsed string

A

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Q. A set of unordered properties that, has a name and value is called______

  • (A) String
  • (B) Array
  • (C) Serialized Object
  • (D) Object

A

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Q. A collection of elements of the same data type which may either in order or not, is called

  • (A) String
  • (B) Array
  • (C) Serialized Object
  • (D) Object

A

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Q. The linkage of a set of prototype objects is known as______

  • (A) prototype stack
  • (B) prototype
  • (C) prototype class
  • (D) prototype chain

A

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Q. In the following line of code, what we will call the "datatype" written in brackets?

Code: 
article[datatype]=assignment_value;
  • (A) An String
  • (B) A integer
  • (C) An object
  • (D) Floating point

A

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Q. To know about an object, whether the object is a prototype (or a part of a prototype chain) of another object, the user can use_______

  • (A) ==operator
  • (B) equals() method
  • (C) === operator
  • (D) isPrototypeOf() method

A

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Q. In the following given line of code, the prototype representing the_____

Code: 
functionx(){};
  • (A) Function x
  • (B) Prototype of a function
  • (C) A custom constructor
  • (D) Not valid

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