Javascript Online Quiz

Q 1 - Which of the following is true about variable naming conventions in JavaScript?

A - JavaScript variable names must begin with a letter or the underscore character.

B - JavaScript variable names are case sensitive.

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 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 sorts the elements of an array?

A - changeOrder(order)

B - order()

C - sort()

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 creates an HTML anchor that is used as a hypertext target?

A - anchor()

B - link()

C - blink()

D - big()

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 represents the source code of an object?

A - toSource()

B - splice()

C - toString()

D - unshift()