Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

12 Questions

0 Views

Quiz PDF File Generation Assistance

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main purpose of using a 'closure' in programming?

To encapsulate data within a function

To pass arguments to a function by reference

To create parallel execution of code blocks (correct)

To prevent code from executing until a condition is met

Which JavaScript data type is not classified as a primitive type?

Array (correct)

String

Boolean

Number

What distinguishes 'null' from 'undefined' in JavaScript?

"Undefined" is a keyword used for function parameters, while "null" is used for variable declarations

"Null" indicates the absence of a value, while "undefined" means a variable has been declared but not assigned a value (correct)

"Null" is a primitive data type, while "undefined" is an object

They are essentially the same and can be used interchangeably

What does the 'z-index' property in CSS primarily control?

To control the vertical stacking order of elements that overlap Signup and view all the answers

Why do programming languages utilize 'closures'?

To establish private variables and functions within functions Signup and view all the answers

When styling web elements, what does the 'display' property in CSS help control?

The layout and rendering behavior of elements Signup and view all the answers

What is the purpose of the 'JOIN' clause in SQL?

Combines rows from two or more tables based on a related column between them Signup and view all the answers

What does the 'cluster' module in Node.js primarily do?

To manage and distribute tasks across multiple CPU cores for improved performance Signup and view all the answers

In JavaScript, what does the 'this' keyword primarily refer to?

To refer to the current object context within a function or method Signup and view all the answers

What is the main function of the 'GROUP BY' clause in SQL?

Groups rows with the same values into summary rows Signup and view all the answers

In React, what does 'props drilling' refer to and how can it be addressed?

Props drilling refers to passing data through multiple layers of components, and it can be mitigated using context or Redux for state management Signup and view all the answers

What is the role of 'async' and 'await' keywords in JavaScript?

To define asynchronous functions and handle asynchronous operations more elegantly Signup and view all the answers