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Programming quizzes and knowledge tests Short quizzes on programming, logic and computer science. Test and improve your coding knowledge. Join 👉 https://rebrand.ly/bigdatachannels DMCA: @disclosure_bds Contact: @mldatascientist

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737

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();

737

Which type of Developer you are?

Anonymous voting

737

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);

737

Which attribute of the

Anonymous voting

737

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

const str = 'abcde';

737

How can you make a text bold in CSS?

Anonymous voting

737

What is the result of 5 + "5" in JavaScript?

Anonymous voting

737

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);

737

Which of the following is the correct way to comment in HTML?

Anonymous voting

737

Which method can be used to convert a string to a number?

Anonymous voting

737

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

console.log(randomNumbers);

737

Which attribute is used to specify the URL in an img tag?

Anonymous voting

737

In React, how do you pass data from a parent component to a child component?

Anonymous voting

737

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]);
}

737

What is the purpose of the rel="preload" attribute in a tag?

Anonymous voting

737

What is the purpose of the CSS pseudo-class ":first-child"?

Anonymous voting

737

JavaScript Task Display the following pyramid Difficulty: Average🤨

737

How do you handle asynchronous operations in JavaScript?

Anonymous voting

737

What is the difference between relative and absolute positioning in CSS?

Anonymous voting

737

Find the error in the code. Difficulty: Hard😤

function processArray(arr) {
    let result = [];
    
    arr.forEach(item => {
        if (item != '') { 
            result.push(item);
        } else if (typeof item === 'number') { 
            result.push(item * 2);
        }
    });

    return result;
}

let data = [1, '', 2, 3, '', 5, null, undefined, 'hello'];

console.log(processArray(data));