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 true about cookie handling in JavaScript?

A - JavaScript can manipulate cookies using the cookie property of the Document object.

B - JavaScript can read, create, modify, and delete the cookie or cookies that apply to the current web page.

C - Both of the above.

D - None of the above.

Answer : C

Explanation

Both of the above options are correct.

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 reverses the order of the elements of an array?

A - changeOrder(order)

B - reverse()

C - sort(order)

D - None of the above.

Answer : B

Explanation

reverse() method reverses the order of the elements of an array -- the first becomes the last, and the last becomes the first.

Q 5 - Which of the following function of Number object returns a string value version of the current number?

Answer : A

Explanation

toString() − Returns a string value version of the current number.

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?

Answer : A

Explanation

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

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?

Answer : D

Explanation

bold() − Creates a string to be displayed as bold as if it were in a <b> tag.

Q 8 - Which of the following function of String object causes a string to be displayed in fixed-pitch font as if it were in a <tt> tag?

Answer : A

Explanation

fixed() − Causes a string to be displayed in fixed-pitch font as if it were in a <tt> tag.

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?

Answer : C

Explanation

filter() − Creates a new array with all of the elements of this array for which the provided filtering function returns true.

Q 10 - Which of the following function of Array object applies a function simultaneously against two values of the array (from right-to-left) as to reduce it to a single value?

Answer : D

Explanation

reduceRight() − Applies a function simultaneously against two values of the array (from right-to-left) as to reduce it to a single value.

javascript_questions_answers.htm