LLD interview expectations - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a class with a constructor in LLD.

LLD

class User {
  constructor([1]) {
    this.name = name;
  }
}

Drag options to blanks, or click blank then click option'

Aemail

Bname

Cage

Did

Attempts:

3 left

💡 Hint

Common Mistakes

Using a parameter that does not match the property name.

The constructor parameter should be name to assign it to this.name.

2fill in blank

medium

Complete the code to add a method that returns the user's name.

LLD

class User {
  constructor(name) {
    this.name = name;
  }

  getName() {
    return this.[1];
  }
}

Drag options to blanks, or click blank then click option'

Ausername

Bid

Cname

DuserName

Attempts:

3 left

💡 Hint

Common Mistakes

Returning a property that does not exist or is misspelled.

The method should return the name property of the object.

3fill in blank

hard

Fix the error in the code to correctly implement a setter method for the user's age.

LLD

class User {
  constructor(name) {
    this.name = name;
    this.age = 0;
  }

  setAge([1]) {
    this.age = age;
  }
}

Drag options to blanks, or click blank then click option'

AageValue

Bvalue

CnewAge

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using a parameter name different from the one assigned to the property.

The parameter name must be age to match the assignment this.age = age;.

4fill in blank

hard

Fill both blanks to create a method that returns a formatted string with the user's name and age.

LLD

class User {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  getInfo() {
    return `$[1] is $[2] years old.`;
  }
}

Drag options to blanks, or click blank then click option'

Athis.name

Bthis.age

Cname

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names without this inside class methods.

The template string should use this.name and this.age to access the object's properties.

5fill in blank

hard

Fill all three blanks to implement a method that updates the user's name and age only if the new values are valid.

LLD

class User {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  updateUser([1], [2]) {
    if (typeof [3] === 'string' && [2] > 0) {
      this.name = [1];
      this.age = [2];
    }
  }
}

Drag options to blanks, or click blank then click option'

AnewName

BnewAge

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using inconsistent parameter names in the method and condition.

The method parameters should be newName and newAge. The type check uses newName to verify the string.