Javascript Online Quiz

Q 1 - Which of the following is an advantage of using JavaScript?

A - Less server interaction

B - Immediate feedback to the visitors

C - Increased interactivity

D - All of the above.

Q 2 - How can you get the type of arguments passed to a function?

A - using typeof operator

B - using getType function

C - Both of the above.

D - None of the above.

Q 3 - Which of the following is correct about callbacks?

A - A callback is a plain JavaScript function passed to some method as an argument or option.

B - Some callbacks are just events, called to give the user a chance to react when a certain state is triggered.

C - Both of the above.

D - None of the above.

Q 4 - Which built-in method returns the characters in a string beginning at the specified location?

A - substr()

B - getSubstring()

C - slice()

D - None of the above.

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 is used to match a regular expression against a string?

A - concat()

B - match()

C - search()

D - replace()

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

A - anchor()

B - big()

C - blink()

D - bold()

Q 8 - Which of the following function of String object causes a string to be displayed as a subscript, as if it were in a <sub> tag?

A - sup()

B - small()

C - strike()

D - sub()

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 adds one or more elements to the front of an array and returns the new length of the array?

A - unshift()

B - sort()

C - splice()

D - toString()