JavaScript Multiple Choice Questions (MCQ) Online Test #15

JavaScript MCQ #141:

What is the purpose of the return statement in a JavaScript function?

To create a loop within the function

To start the function execution

To define a new function

To end the function execution and optionally return a value

About JavaScript Multiple Choice Question (MCQ) #141:
This ICT Multiple Choice Question (ICT MCQ) #141 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question tests the understanding of the purpose of the return statement in a JavaScript function.

JavaScript MCQ #142:

What is the result of the expression false || true in JavaScript?

true

false

undefined

NaN

About JavaScript Multiple Choice Question (MCQ) #142:
This ICT Multiple Choice Question (ICT MCQ) #142 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question tests understanding of the logical OR operator's evaluation.

JavaScript MCQ #143:

What does the continue statement do in a loop?

Skips the rest of the current iteration and proceeds to the next iteration

Exits the loop completely

Restarts the loop from the beginning

Terminates the loop if a condition is met

About JavaScript Multiple Choice Question (MCQ) #143:
This ICT Multiple Choice Question (ICT MCQ) #143 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question evaluates understanding of the continue statement's behavior in loops.

JavaScript MCQ #144:

What is the output of the following code snippet?

['name', 'Alice', 'age', 25]

['Alice', 25]

['name', 'age']

['Alice', 25, 'name', 'age']

About JavaScript Multiple Choice Question (MCQ) #144:
This ICT Multiple Choice Question (ICT MCQ) #144 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question tests knowledge of the Object.keys() method.

JavaScript MCQ #145:

What does the throw statement do in JavaScript error handling?

Ends the execution of a try block without handling errors

Catches an exception thrown by a try block

Defines a block of code to be executed after an exception is caught

Throws an exception that can be caught by a catch block

About JavaScript Multiple Choice Question (MCQ) #145:
This ICT Multiple Choice Question (ICT MCQ) #145 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question tests knowledge of the purpose of the throw statement.

JavaScript MCQ #146:

How do you integrate JavaScript with an HTML form to handle form submissions?

By placing JavaScript code inside the <form> tag

By using the submit() method directly on the form element

By adding a click event listener to the form's submit button

By adding an onsubmit attribute to the <form> element and defining a function to handle the submission

About JavaScript Multiple Choice Question (MCQ) #146:
This ICT Multiple Choice Question (ICT MCQ) #146 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question tests knowledge of integrating JavaScript with HTML forms for handling submissions.

JavaScript MCQ #147:

What is the main advantage of using JavaScript frameworks like React, Angular, or Vue?

They are exclusively for server-side programming

They make JavaScript code slower and less efficient

They convert JavaScript into other programming languages

They provide pre-built components and tools to streamline development

About JavaScript Multiple Choice Question (MCQ) #147:
This ICT Multiple Choice Question (ICT MCQ) #147 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question tests knowledge of the advantages of JavaScript frameworks.

JavaScript MCQ #148:

What is the purpose of using Web Workers in JavaScript?

To optimize image loading

To manage user interface events

To handle asynchronous code directly

To run JavaScript code in background threads without blocking the main thread

About JavaScript Multiple Choice Question (MCQ) #148:
This ICT Multiple Choice Question (ICT MCQ) #148 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question assesses the use of Web Workers in JavaScript.

JavaScript MCQ #149:

How does Jest support snapshot testing?

By running tests in parallel

By generating and comparing saved snapshots of component outputs

By mocking API requests

By profiling code execution

About JavaScript Multiple Choice Question (MCQ) #149:
This ICT Multiple Choice Question (ICT MCQ) #149 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question evaluates knowledge of Jest's snapshot testing feature.

JavaScript MCQ #150:

Which Ionic component is used for creating a tabbed navigation interface?

About JavaScript Multiple Choice Question (MCQ) #150:
This ICT Multiple Choice Question (ICT MCQ) #150 focuses on JavaScript within the "Intermediate ICT MCQ" category. This question tests knowledge of Ionic components used for navigation.

This page was last modified on Dec 30, 2024 by ICT MCQ Hub.

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JavaScript Multiple Choice Questions (MCQ) Online Test #15

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