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 correct about features of JavaScript?

A - JavaScript is a lightweight, interpreted programming language.

B - JavaScript is designed for creating network-centric applications.

C - JavaScript is complementary to and integrated with Java.

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 of the following type of variable takes precedence over other if names are same?

A - global variable

B - local variable

C - Both of the above.

D - None of the above.

Answer : B

Explanation

A local variable takes precedence over a global variable with the same name.

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 Boolean object returns a string of either 'true' or 'false' depending upon the value of the object?

A - toSource()

B - valueOf()

C - toString()

D - None of the above.

Answer : C

Explanation

toString() − Returns a string of either 'true' or 'false' depending upon the value of the object.

Q 6 - Which of the following function of String object returns the characters in a string beginning at the specified location through the specified number of characters?

Answer : C

Explanation

substr() − Returns the characters in a string beginning at the specified location through the specified number of characters.

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

A - toLocaleUpperCase()

B - toUpperCase()

C - toString()

D - substring()

Answer : B

Explanation

toUpperCase() − Returns the calling string value converted to upper case.

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?

Answer : D

Explanation

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

Q 9 - Which of the following function of Array object returns true if every element in this array satisfies the provided testing function?

Answer : B

Explanation

every() − Returns true if every element in this array satisfies the provided testing function.

Q 10 - Which of the following function of Array object sorts the elements of an array?

Answer : B

Explanation

sort() − Sorts the elements of an array.

javascript_questions_answers.htm