Combined Patterns and Advanced Concepts

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 will the following code output?

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What is the output of the following code?

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What does the following code output?

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Which of the following correctly illustrates prototype inheritance?

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What will the following code output?

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What is the main advantage of using the module pattern?

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What is the output of the following code?

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What will the following code output?

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What is the output of the following code?

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Which of the following is a characteristic of closures?

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What will the following code output?

function create() {   let name = "Closure";   return function() {     return name;   }; } const getName = create(); console.log(getName());

Closure

undefined

Error

null

What is the output of the following code?

var x = 1; (function() {   var x = 2;   console.log(x); })(); console.log(x);

1, 2

2, 1

2, 2

1, 1

What does the following code output?

const moduleA = (function() {   let privateVar = "I am private";   return {     getPrivate: function() {       return privateVar;     }   }; })(); console.log(moduleA.getPrivate());

I am private

undefined

Error

null

Which of the following correctly illustrates prototype inheritance?

Child.prototype = Parent;

Child.prototype = Object.create(Parent.prototype);

Child.prototype = new Parent();

Child.prototype = Parent.prototype;

What will the following code output?

let a = 10; function test() {   console.log(a);   var a = 20; } test();

10

20

undefined

null

What is the main advantage of using the module pattern?

It creates global variables

It allows encapsulation and prevents pollution of the global scope

It simplifies function declarations

It allows inheritance

What is the output of the following code?

function Parent() {} function Child() {} Child.prototype = Object.create(Parent.prototype); const childInstance = new Child(); console.log(childInstance instanceof Parent);

true

false

Error

undefined

What will the following code output?

let count = 0; const incrementCounter = (function() {   return function() {     count++;     return count;   }; })(); console.log(incrementCounter()); console.log(incrementCounter());

1, 1

1, 2

0, 1

0, 0

What is the output of the following code?

console.log(a); var a = 10; console.log(a);

10, 10

undefined, 10

10, undefined

Error

Which of the following is a characteristic of closures?

They can only access variables defined in the outer function

They are destroyed after the outer function returns

They can access variables from the global scope

They can be garbage collected immediately after execution