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 a disadvantage of using JavaScript?

A - Client-side JavaScript does not allow the reading or writing of files.

B - JavaScript can not be used for Networking applications because there is no such support available.

C - JavaScript doesn't have any multithreading or multiprocess capabilities.

D - All of the above.

Answer : D

Explanation

All 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 of the following type of variable is visible only within a function where it is defined?

A - global variable

B - local variable

C - Both of the above.

D - None of the above.

Answer : B

Explanation

Local Variables: A local variable will be visible only within a function where it is defined. Function parameters are always local to that function.

Q 4 - Which built-in method returns the string representation of the number's value?

A - toValue()

B - toNumber()

C - toString()

D - None of the above.

Answer : C

Explanation

toString() method returns the string representation of the number's value.

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.

Answer : B

Explanation

valueOf() − Returns the primitive value of the Boolean object.

Q 6 - Which of the following function of String object executes the search for a match between a regular expression and a specified string?

Answer : D

Explanation

search() − Executes the search for a match between a regular expression and a specified string.

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 applies a function simultaneously against two values of the array (from left-to-right) as to reduce it to a single value?

Answer : C

Explanation

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

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.

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