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Welcome to the Basics of JavaScript MCQs Page

Dive deep into the fascinating world of Basics of JavaScript with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Basics of JavaScript, a crucial aspect of JavaScript. In this section, you will encounter a diverse range of MCQs that cover various aspects of Basics of JavaScript, 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.

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Check out the MCQs below to embark on an enriching journey through Basics of JavaScript. 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 Basics of JavaScript. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Basics of JavaScript MCQs | Page 3 of 7

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Q21.
A function definition expression can be called
Discuss
Answer: (b).Function literal
Discuss
Answer: (a).stand-alone expressions
Q23.
Consider the following statements:

var text = "testing: 1, 2, 3"; // Sample text
var pattern = /d+/g // Matches all instances of one or more digits

In order to check if the pattern matches with the string "text", the statement is
Discuss
Answer: (d).pattern.test(text)
Q24.
The JavaScript's syntax calling ( or executing ) a function or method is called
Discuss
Answer: (c).Invocation expression
Discuss
Answer: (b).Object Creation Expression
Q26.
Which of the operator is used to test if a particular property exists or not?
Discuss
Answer: (a).in
Q27.
Among the following, which one is a ternary operator?

a.

+

b.

:

c.

"

d.

?:

Discuss
Answer: (d).?:
Q28.
"An expression that can legally appear on the left side of an assignment expression." is a well known explanation for variables, properties of objects, and elements of arrays. They are called
Discuss
Answer: (c).Lvalue
Q29.
JavaScript is a _______________ language
Discuss
Answer: (d).Object-Based
Q30.
The output for the following code snippet would most appropriately be
var a=5 , b=1
var obj = { a : 10 }
with(obj) 
{
      alert(b)
}
Discuss
Answer: (c).1
Page 3 of 7

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