Programming Quiz Channel

JavaScript Task Given an array. Print to the console all options for permuting the elements of this array. Difficulty: Hard😤

const arr = [1, 2, 3, 4];

What will this code output? Spot the bug. Difficulty: Average🤨

const obj = {
    value: 42,
    getValue: function() {
        setTimeout(function() {
            console.log(this.value); 
        }, 1000);
    }
};

obj.getValue();

Find errors in the code. Difficulty: Average🤨

function bubbleSort(arr) {
    let n = arr.length;

    for (let i = 0; i < n - 1; i++) {
        for (let j = 0; j < n - i - 1; j++) {
            if (j > arr[j + 1]) {
                let temp = j;
                arr[j] = arr[j + 1];
                arr[j + 1] = temp;
            }
        }

    }
    return arr; 
}

const numbers = [64, 34, 25, 12, 22, 11, 90];
const sortedNumbers = bubbleSort(numbers);
console.log("Sorted array:", sortedNumbers);

JavaScript Task Get an array of letters from this string. Difficulty: Easy😁

const str = 'abcde';

Find errors in the code. Difficulty: Impossible😈

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

    getProfile() {
        return Name: ${name}, Age: ${this.age}; 
    }

    isAdult() {
        return this.age > 18 ? "Yes" : false; 
    }

    updateProfile(newName, newAge) {
        if (newAge < 0) {
            throw "Age can't be negative"; 
        }
        this.name = newName ?? this.name; 
        this.age = newAge || this.age;
    }
}

const user = new User("John", 25);

console.log(user.getProfile());?2
user.updateProfile("", -5);

JavaScript Task Fill the array with random numbers from 1 to 100. Difficulty: Easy😁

console.log(randomNumbers);

Find the error in the code. Difficulty: Easy😁

let fruits = ['apple', 'banana', 'orange'];

for (let i = 0; i <= fruits.length; i++) { 
    console.log(fruits[i]);
}

JavaScript Task Display the following pyramid Difficulty: Average🤨

1
22
333
4444
55555
666666
7777777
88888888
999999999