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    • JavaScript Objects

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    Question 1

    Which of the following is a valid way to define a function as a property of an object?

    • A

      obj.func = function() { ... }

    • B

      obj.func = () => { ... }

    • C

      Both

    • D

      None of the above

    Question 2

    Which is the correct way to create an object in JavaScript?

    • A

      let obj = Object();

    • B

      let obj = { key: "value" };

    • C

      let obj = new Object("key", "value");

    • D

      let obj = Object.create();

    Question 3

    How do you access the property of an object using bracket notation?

    • A

      obj.key

    • B

      obj["key"]

    • C

      obj(key)

    • D

      obj->key

    Question 4

    Which method is used to merge two objects?

    • A

      Object.assign()

    • B

      Object.merge()

    • C

      Object.create()

    • D

      Object.combine()

    Question 5

    What is the purpose of the prototype property in JavaScript objects?

    • A

      To create new properties in an object

    • B

      To define methods and properties for inheritance

    • C

      To store the type of the object

    • D

      To delete existing properties

    Question 6

    Which of the following creates a deep copy of an object?

    • A

      JSON.stringify() and JSON.parse()

    • B

      Object.assign()

    • C

      Object.create()

    • D

      Object.freeze()

    Question 7

    What will the following code log?

    JavaScript 
    const obj = { a: 1 };
obj.b = 2;
console.log(obj);


    • A

      { a: 1 }

    • B

      { a: 1, b: 2 }

    • C

      Error

    • D

      undefined

    Question 8

    Which of the following is a valid getter in an object?

    • A

      get name() { return this._name; }

    • B

      getter name() { return this._name; }

    • C

      get: function() { return this.name; }

    • D

      name.get { return this._name; }

    Question 9

    What will the following code log?

    JavaScript 
    const obj = { a: 1, b: 2 };
delete obj.a;
console.log(obj)


    • A

      { b: 2 }

    • B

      { a: null, b: 2 }

    • C

      { a: undefined, b: 2 }

    • D

      Error

    Question 10

    What is the purpose of Object.freeze()?

    • A

      To prevent new properties from being added

    • B

      To make the object immutable

    • C

      To prevent existing properties from being changed

    • D

      All of the above

    There are 10 questions to complete.

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