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Javascript Online Quiz

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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.

Questions and Answers

Q 1 - Is JavaScript a case-sensitive language?

A - true

B - false

Answer : A

Explanation

Yes! JavaScript is a case-sensitive language. This means that language keywords, variables, function names, and any other identifiers must always be typed with a consistent capitalization of letters.

Q 2 - Which of the following is a valid type of function javascript supports?

A - named function

B - anonymous function

C - Both of the above.

D - None of the above.

Answer : C

Explanation

A function in JavaScript can be either named or anonymous.

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 built-in method returns the calling string value converted to lower case?

A - toLowerCase()

B - toLower()

C - changeCase(case)

D - None of the above.

Answer : A

Explanation

toLowerCase() method returns the calling string value converted to lower case.

Q 5 - Which of the following function of Number object returns the number's value?

A - toString()

B - valueOf()

C - toLocaleString()

D - toPrecision()

Answer : B

Explanation

valueOf() − Returns the number's value.

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?

A - lastIndexOf()

B - search()

C - substr()

D - indexOf()

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 returns the primitive value of the specified object.

A - toLocaleUpperCase()

B - toUpperCase()

C - toString()

D - valueOf()

Answer : D

Explanation

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

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

A - fixed()

B - fontcolor()

C - fontsize()

D - italics()

Answer : D

Explanation

italics() − Causes a string to be italic, as if it were in an <i> 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?

A - concat()

B - every()

C - filter()

D - some()

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 adds and/or removes elements from an array?

A - toSource()

B - sort()

C - splice()

D - unshift()

Answer : C

Explanation

splice() − Adds and/or removes elements from an array.

javascript_questions_answers.htm
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