Instructions

  • 1. Your final score will reflect your grasp of the concepts—approach each question with precision.
  • 2. Thoroughly review each solution before proceeding to ensure full understanding.
  • 3. Final results will be available after submission to provide insights into areas for further improvement.
  • 4. Maintain academic integrity—plagiarism undermines learning and professional growth.
  • 5. Once submitted, responses are final, so ensure you’re confident in your answers.
  • 6. These challenges are designed to test practical knowledge; apply your skills as you would in real-world scenarios.

All Problems

Question

Action

What is the purpose of performance optimization?

View

Which method is recommended for optimizing loops?

View

What is debouncing?

View

How can you optimize rendering performance in a web application?

View

What does lazy loading refer to?

View

Which of the following can improve the performance of large applications?

View

How can you reduce the number of reflows in the browser?

View

What is the role of Web Workers?

View

Which of the following is a common practice for reducing the size of JavaScript files?

View

What is the benefit of using requestAnimationFrame?

View

What is the purpose of performance optimization?

To make the code look cleaner
To reduce load time and improve responsiveness
To increase memory usage
To add more features

Which method is recommended for optimizing loops?

Using for...in
Storing the length of the array in a variable
Using recursion
Using a forEach loop

What is debouncing?

A way to speed up function calls
Preventing a function from being called multiple times
A method for reducing memory usage
Optimizing network requests

How can you optimize rendering performance in a web application?

By using synchronous JavaScript
By minimizing DOM manipulations
By using inline CSS
By using many global variables

What does lazy loading refer to?

Loading all resources at once
Loading resources only when needed
Delaying the loading of scripts
Loading scripts in the head of the document

Which of the following can improve the performance of large applications?

Code splitting
Avoiding comments
Using multiple global variables
Using synchronous XHR requests

How can you reduce the number of reflows in the browser?

By making all style changes at once
By using inline styles
By changing styles one at a time
By using getComputedStyle frequently

What is the role of Web Workers?

To optimize DOM manipulation
To perform background tasks without blocking the main thread
To increase memory usage
To speed up the loading of images

Which of the following is a common practice for reducing the size of JavaScript files?

Minification
Adding comments
Using eval()
Including all libraries

What is the benefit of using requestAnimationFrame?

It runs code in the background
It helps synchronize rendering with the browser’s refresh rate
It blocks rendering
It reduces memory usage