Welcome to the Classes and Modules MCQs Page

Dive deep into the fascinating world of Classes and Modules with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Classes and Modules, a crucial aspect of JavaScript. In this section, you will encounter a diverse range of MCQs that cover various aspects of Classes and Modules, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within JavaScript.

Check out the MCQs below to embark on an enriching journey through Classes and Modules. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of JavaScript.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Classes and Modules. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Classes and Modules MCQs | Page 4 of 7

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Q31.

Consider the following statement containing regular expressions"

var text = "testing: 1, 2, 3";
var pattern = /d+/g;

In order to check if the pattern matches, the statement is

text==pattern

text.equals(pattern)

text.test(pattern)

pattern.test(text)

Discuss

Answer: (d).pattern.test(text)

Q32.

The regular expression to match any one character not between the brackets is

[…]

[^]

[^…]

[D]

Discuss

Answer: (c).[^…]

Q33.

What does /[^(]* regular expression indicate ?

Match one or more characters that are not open paranthesis

Match zero or more characters that are open paranthesis

Match zero or more characters that are not open paranthesis

Match one or more characters that are open paranthesis

Discuss

Answer: (c).Match zero or more characters that are not open paranthesis

Q34.

What will be the result when non greedy repetition is used on the pattern /a+?b/ ?

Matches the letter b preceded by the fewest number of a's possible

Matches the letter b preceded by any number of a

Matches letter a preceded by letter b, in the stack order

None of the mentioned

Discuss

Answer: (a).Matches the letter b preceded by the fewest number of a's possible

Q35.

What does the subexpression /java(script)?/ result in ?

It matches "java" followed by the optional "script"

It matches "java" followed by any number of "script"

It matches "java" followed by a minimum of one "script"

None of the mentioned

Discuss

Answer: (a).It matches "java" followed by the optional "script"

Q36.

What is the most essential purpose of parantheses in regular expressions ?

Define pattern matching techniques

Define subpatterns within the complete pattern

Define portion of strings in the regular expression

All of the mentioned

Discuss

Answer: (b).Define subpatterns within the complete pattern

Q37.

The method that performs the search-and-replace operation to strings for pattern matching is

searchandreplace()

add()

edit()

replace()

Discuss

Answer: (b).add()

Q38.

What would be the result of the following statement in JavaScript using regular expression methods ?

Returns [“123″”456″”789”]

Returns [“123″,”456″,”789”]

Returns [1,2,3,4,5,6,7,8,9]

Throws an exception

Discuss

Answer: (b).Returns [“123″,”456″,”789”]

Q39.

The Crockford's subset doesnot include which function in JavaScript?

eval()

coeval()

equal()

equivalent()

Discuss

Answer: (a).eval()

Q40.

Why does JavaScript subset disallow == and !=?

It uses bitwise checking

It uses === and !== instead

It uses equals() and notequals() instead

None of the mentioned

Discuss

Answer: (b).It uses === and !== instead

Page 4 of 7

Welcome to the Classes and Modules MCQs Page

Classes and Modules MCQs | Page 4 of 7

Explore more Topics under JavaScript

Basics of JavaScript

Arrays and Functions

Server Side and Client Side Scripting

Document Object Model and Event Handling

Graphics and Rendering

Performance Measures in JavaScript

Socket Programming with JavaScript

Parsing, Benchmarking and Logging

Invocation and Performance

Caching and Debugging

JavaScript Animation

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