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

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What is one of the most common causes of memory leaks in JavaScript applications?

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How can unused variables contribute to memory leaks?

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What is the potential impact of a memory leak in a single-page application (SPA)?

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How can closures lead to memory leaks in JavaScript?

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Which of the following tools can be used to monitor memory usage in a web browser?

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What happens when a DOM node is "detached"?

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How can global variables lead to memory leaks?

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How do timers (setInterval, setTimeout) contribute to memory leaks?

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What is one way to avoid memory leaks when using closures?

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What is the best practice for cleaning up after event listeners?

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What is one of the most common causes of memory leaks in JavaScript applications?

Unused variables
Non-released event listeners
Overused global variables
Poor indentation

How can unused variables contribute to memory leaks?

They use unnecessary memory
They are automatically garbage collected
They slow down the garbage collection process
They don’t contribute to memory leaks

What is the potential impact of a memory leak in a single-page application (SPA)?

Slow page load times
Increased CPU usage
Gradual decrease in performance
All of the above

How can closures lead to memory leaks in JavaScript?

By keeping a reference to the entire scope
By deleting the scope variables
By creating new objects every time
By overwriting global variables

Which of the following tools can be used to monitor memory usage in a web browser?

Chrome Developer Tools
Visual Studio Code
GitHub
npm

What happens when a DOM node is "detached"?

It becomes garbage collected immediately
It no longer affects the page layout
It can lead to memory leaks if still referenced
It is ignored by the browser

How can global variables lead to memory leaks?

They are frequently garbage collected
They are never garbage collected
They automatically clear when unused
They are out of the garbage collector’s scope

How do timers (setInterval, setTimeout) contribute to memory leaks?

They never allow referenced objects to be garbage collected
They execute too quickly
They increase memory usage for no reason
Timers cannot contribute to memory leaks

What is one way to avoid memory leaks when using closures?

Clear all references within the closure when no longer needed
Avoid using closures
Use global variables inside closures
Avoid passing arguments

What is the best practice for cleaning up after event listeners?

Remove event listeners when they are no longer needed
Avoid event listeners altogether
Use a single global event listener
Use setTimeout to remove listeners