Javascript Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to Javascript Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the 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.

Answer : C

Explanation

Both of the above options are correct.

Q 2 - Which of the following is the correct syntax to redirect a url using JavaScript?

A - document.location='http://www.newlocation.com';

B - browser.location='http://www.newlocation.com';

C - navigator.location='http://www.newlocation.com';

D - window.location='http://www.newlocation.com';

Answer : D

Explanation

window.location='http://www.newlocation.com'; is the correct option.

Q 3 - Which built-in method combines the text of two strings and returns a new string?

A - append()

B - concat()

C - attach()

D - None of the above.

Answer : B

Explanation

concat() method returns the character at the specified index.

Q 4 - Which built-in method sorts the elements of an array?

A - changeOrder(order)

B - order()

C - sort()

D - None of the above.

Answer : C

Explanation

sort() method sorts the elements of an array.

Q 5 - Which of the following function of String object returns a number indicating the Unicode value of the character at the given index?

Answer : B

Explanation

charCodeAt() − Returns a number indicating the Unicode value of the character at the given index.

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

Answer : D

Explanation

indexOf() − Returns the index within the calling String object of the first occurrence of the specified value, or -1 if not found.

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

Answer : C

Explanation

blink() − Creates a string to blink as if it were in a <blink> tag.

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

Answer : A

Explanation

sup() − Causes a string to be displayed as a superscript, as if it were in a <sup> tag.

Q 9 - Which of the following function of Array object applies a function simultaneously against two values of the array (from left-to-right) as to reduce it to a single value?