Javascript Online Quiz

Q 1 - Which of the following is true about typeof operator in JavaScript?

A - The typeof is a unary operator that is placed before its single operand, which can be of any type.

B - Its value is a string indicating the data type of the operand.

C - Both of the above.

D - None of the above.

Q 2 - Can you assign a anonymous function to a variable?

A - true

B - false

Q 3 - Which built-in method returns the character at the specified index?

A - characterAt()

B - getCharAt()

C - charAt()

D - None of the above.

Q 4 - Which built-in method returns the calling string value converted to upper case?

A - toUpperCase()

B - toUpper()

C - changeCase(case)

D - None of the above.

Q 5 - Which of the following function of Number object returns the number's value?

A - toString()

B - valueOf()

C - toLocaleString()

D - toPrecision()

Q 6 - Which of the following function of String object returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order?

A - localeCompare()

B - search()

C - substr()

D - concat()

Q 7 - Which of the following function of String object creates a string to be displayed in a big font as if it were in a <big> tag?

A - anchor()

B - big()

C - blink()

D - italics()

Q 8 - Which of the following function of String object causes a string to be displayed in the specified color as if it were in a <font color='color'> tag?

A - fixed()

B - fontcolor()

C - blink()

D - bold()

Q 9 - Which of the following function of Array object returns true if every element in this array satisfies the provided testing function?

A - concat()

B - every()

C - push()

D - some()

Q 10 - Which of the following function of Array object applies a function simultaneously against two values of the array (from right-to-left) as to reduce it to a single value?

A - pop()

B - push()

C - reduce()

D - reduceRight()