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

How can you assign a new variable name while destructuring an object?

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What is the result of this code: const {a, b = 10} = {a: 5}; console.log(b);?

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How do you destructure nested objects?

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What is the output of this code: const {a, b: {c}} = {a: 1, b: {c: 3}}; console.log(c);?

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Can default values be assigned while destructuring nested objects?

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What is the result of this code: const {a: x, b: y = 20} = {a: 10}; console.log(x, y);?

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How do you destructure an object inside a function parameter?

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What happens if you try to destructure an undefined property?

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How do you destructure and assign a property with a different name?

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Can you destructure an object with dynamic property names?

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How can you assign a new variable name while destructuring an object?

const {oldVar: newVar} = obj;
const [oldVar: newVar] = obj;
const (oldVar: newVar) = obj;
const {oldVar = newVar} = obj;

What is the result of this code: const {a, b = 10} = {a: 5}; console.log(b);?

5
10
undefined
null

How do you destructure nested objects?

const {a: {b}} = obj;
const {a.b} = obj;
const [a: {b}] = obj;
const {a, b} = obj;

What is the output of this code: const {a, b: {c}} = {a: 1, b: {c: 3}}; console.log(c);?

1
3
undefined
It throws an error

Can default values be assigned while destructuring nested objects?

No, default values only work with arrays
Yes, using the = syntax
Yes, but only for top-level properties
No, destructuring doesn't support defaults

What is the result of this code: const {a: x, b: y = 20} = {a: 10}; console.log(x, y);?

10, 20
10, undefined
a, 20
It throws an error

How do you destructure an object inside a function parameter?

function myFunc([a, b]) {}
function myFunc({a, b}) {}
function myFunc(a, b) {}
function myFunc{{a, b}} {}

What happens if you try to destructure an undefined property?

It throws an error
The property is assigned null
The property is assigned undefined
The code stops execution

How do you destructure and assign a property with a different name?

const {alias: prop} = obj;
const [prop: alias] = obj;
const {prop: alias} = obj;
const {alias.prop} = obj;

Can you destructure an object with dynamic property names?

No, destructuring only works with static property names
Yes, using computed property names inside brackets
Yes, but only for functions
No, destructuring doesn't support this