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 calls a function for each element in the array?

A - while()

B - loop()

C - forEach()

D - None of the above.

Q 4 - Which built-in method returns the string representation of the number's value?

A - toValue()

B - toNumber()

C - toString()

D - None of the above.

Q 5 - Which of the following function of Boolean object returns the primitive value of the Boolean object?

A - toSource()

B - valueOf()

C - toString()

D - None of the above.

Q 6 - Which of the following function of String object returns the index within the calling String object of the last occurrence of the specified value?

A - lastIndexOf()

B - search()

C - substr()

D - indexOf()

Q 7 - Which of the following function of String object returns the calling string value converted to upper case while respecting the current locale?

A - toLocaleUpperCase()

B - toUpperCase()

C - toString()

D - substring()

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 removes the last element from an array and returns that element?

A - pop()

B - push()

C - join()

D - map()

Q 10 - Which of the following function of Array object returns true if at least one element in this array satisfies the provided testing function?

A - reverse()

B - shift()

C - slice()

D - some()