Learn JavaScript MCQ Questions with answers and solutions.

A

Admin • 828.03K Points
Coach

Q. Which of the following type of a variable is volatile?

(A) Mutable variable
(B) Dynamic variable
(C) Volatile variable
(D) Immutable variable

A

Admin • 828.03K Points
Coach

Q. Which of the following option is used as hexadecimal literal beginning?

(A) 00
(B) 0x
(C) 0X
(D) Both 0x and 0X

A

Admin • 828.03K Points
Coach

Q. When there is an indefinite or an infinite value during an arithmetic computation in a program, then JavaScript prints______.

(A) Prints an exception error
(B) Prints an overflow error
(C) Displays "Infinity"
(D) Prints the value as such

A

Admin • 828.03K Points
Coach

Q. In the JavaScript, which one of the following is not considered as an error:

(A) Syntax error
(B) Missing of semicolons
(C) Division by zero
(D) Missing of Bracket

A

Admin • 828.03K Points
Coach

Q. Which of the following givenfunctions of the Number Object formats a number with a different number of digits to the right of the decimal?

(A) toExponential()
(B) toFixed()
(C) toPrecision()
(D) toLocaleString()

A

Admin • 828.03K Points
Coach

Q. Which of the following number object function returns the value of the number?

(A) toString()
(B) valueOf()
(C) toLocaleString()
(D) toPrecision()

Show Answer Discuss Share

A

Admin • 828.03K Points
Coach

Q. Which of the following function of the String object returns the character in the string starting at the specified position via the specified number of characters?

(A) slice()
(B) split()
(C) substr()
(D) search()

A

Admin • 828.03K Points
Coach

Q. In JavaScript the x===y statement implies that:

(A) Both x and y are equal in value, type and reference address as well.
(B) Both are x and y are equal in value only.
(C) Both are equal in the value and data type.
(D) Both are not same at all.

A

Admin • 828.03K Points
Coach

Q. Choose the correct snippet from the following to check if the variable "a" is not equal the "NULL":

(A) if(a!==null)
(B) if (a!)
(C) if(a!null)
(D) if(a!=null)

A

Admin • 828.03K Points
Coach

Q. Suppose we have a text "human" that we want to convert into string without using the "new" operator. Which is the correct way from the following to do so:

(A) toString()
(B) String(human)
(C) String newvariable="human"
(D) Both human.toString() and String(human)

JavaScript MCQs with answers Page - 8

Q. Which of the following type of a variable is volatile?

Q. Which of the following option is used as hexadecimal literal beginning?

Q. When there is an indefinite or an infinite value during an arithmetic computation in a program, then JavaScript prints______.

Q. In the JavaScript, which one of the following is not considered as an error:

Q. Which of the following givenfunctions of the Number Object formats a number with a different number of digits to the right of the decimal?

Q. Which of the following number object function returns the value of the number?

Q. Which of the following function of the String object returns the character in the string starting at the specified position via the specified number of characters?

Q. In JavaScript the x===y statement implies that:

Q. Choose the correct snippet from the following to check if the variable "a" is not equal the "NULL":

Q. Suppose we have a text "human" that we want to convert into string without using the "new" operator. Which is the correct way from the following to do so:

Add MCQ in this Category

Browse Categories