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 - Which of the following is the correct syntax to print a page using JavaScript?

A - window.print();

B - browser.print();

C - navigator.print();

D - document.print();

Q 3 - Which built-in method returns the length of the string?

A - length()

B - size()

C - index()

D - None of the above.

Q 4 - All user-defined objects and built-in objects are descendants of an object called Object?

A - true

B - false

Q 5 - Which of the following function of String object returns the character at the specified index?

A - charAt()

B - charCodeAt()

C - concat()

D - indexOf()

Q 6 - Which of the following function of String object extracts a section of a string and returns a new string?

A - slice()

B - split()

C - replace()

D - search()

Q 7 - Which of the following function of String object returns a string representing the specified object?

A - toLocaleUpperCase()

B - toUpperCase()

C - toString()

D - substring()

Q 8 - Which of the following function of Array object returns a new array comprised of this array joined with other array(s) and/or value(s)?

A - concat()

B - pop()

C - push()

D - some()

Q 9 - Which of the following function of Array object creates a new array with all of the elements of this array for which the provided filtering function returns true?

A - concat()

B - every()

C - filter()

D - some()

Q 10 - Which of the following function of Array object removes the first element from an array and returns that element?

A - reverse()

B - shift()

C - slice()

D - some()