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 does IIFE stand for in JavaScript?

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Which of the following is the correct syntax for an IIFE?

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What is the purpose of using IIFE in JavaScript?

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What does the following code print? (function() { console.log("Hello!"); })();

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What will happen if you don't invoke an IIFE immediately?

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Why are IIFEs commonly used in JavaScript?

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What is the return value of this IIFE? (function() { return 5; })();

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Can IIFEs be used with parameters?

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What will the following code output? (function(a, b) { console.log(a + b); })(2, 3);

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Which of the following is true about IIFE in ES6?

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What does IIFE stand for in JavaScript?

Immediately Invoked Function Expressions
Inferred Internal Function Execution
Independent Internal Function Expressions
Internal Invoked Function Execution

Which of the following is the correct syntax for an IIFE?

function() {}();
(function() {})();
{function()()}();
function() {}[];

What is the purpose of using IIFE in JavaScript?

To expose global variables
To create private scopes
To declare global constants
To delay function execution

What does the following code print? (function() { console.log("Hello!"); })();

Hello!
undefined
Error
null

What will happen if you don't invoke an IIFE immediately?

The function will execute after a delay
It will be treated like a regular function
It will throw an error
The code inside won't execute

Why are IIFEs commonly used in JavaScript?

To avoid polluting the global scope
To make functions synchronous
To simplify code execution
To pass parameters by reference

What is the return value of this IIFE? (function() { return 5; })();

5
undefined
Error
null

Can IIFEs be used with parameters?

No
Yes, by passing arguments after the function definition
Only in strict mode
Only if this is used

What will the following code output? (function(a, b) { console.log(a + b); })(2, 3);

5
23
undefined
Error

Which of the following is true about IIFE in ES6?

Arrow functions cannot be used as IIFEs
IIFEs must always return a value
IIFEs can be written as arrow functions
IIFEs automatically bind this