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 an advantage of using JavaScript?

A - Less server interaction

B - Immediate feedback to the visitors

C - Increased interactivity

D - All of the above.

Answer : D

Explanation

All of the above options are correct.

Q 2 - Which of the following is the correct syntax to create a cookie using JavaScript?

A - document.cookie = 'key1 = value1; key2 = value2; expires = date';

B - browser.cookie = 'key1 = value1; key2 = value2; expires = date';

C - window.cookie = 'key1 = value1; key2 = value2; expires = date';

D - navigator.cookie = 'key1 = value1; key2 = value2; expires = date';

Answer : A

Explanation

document.cookie = 'key1 = value1; key2 = value2; expires = date'; is the correct option.

Q 3 - Which built-in method returns the index within the calling String object of the first occurrence of the specified value?

A - getIndex()

B - location()

C - indexOf()

D - None of the above.

Answer : C

Explanation

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

Q 4 - Which of the following function of Number object formats a number with a specific number of digits to the right of the decimal?

Answer : B

Explanation

toFixed() − Formats a number with a specific number of digits to the right of the decimal.

Q 5 - Which of the following function of Number object defines how many total digits to display of a number?

Answer : D

Explanation

toPrecision() − Defines how many total digits (including digits to the left and right of the decimal) to display of a number.

Q 6 - Which of the following function of String object is used to match a regular expression against a string?

Answer : B

Explanation

match() − Used to match a regular expression against a string.

Q 7 - Which of the following function of String object returns the calling string value converted to lower case?

A - toLocaleLowerCase()

B - toLowerCase()

C - toString()

D - substring()

Answer : B

Explanation

toLowerCase() − Returns the calling string value converted to lower case.

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

Answer : C

Explanation

strike() − Causes a string to be displayed as struck-out text, as if it were in a <strike> tag.

Q 9 - Which of the following function of Array object adds one or more elements to the end of an array and returns the new length of the array?

Answer : B

Explanation

push() − Adds one or more elements to the end of an array and returns the new length of the array.

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?

Answer : D

Explanation

some() − Returns true if at least one element in this array satisfies the provided testing function.

javascript_questions_answers.htm