Coding Rider
Home / Practice & Quizzes

Practice Coding & Topic-wise Quizzes

Solidify your conceptual foundations through interactive multiple-choice quizzes and algorithmic practice challenges.

Interactive Assessment Quizzes

Test your retention and earn a passing score.

Programming Languages beginner

Python Fundamentals Quiz

Test your knowledge on Python syntax, variables, lists, and loops.

5 Questions 10 mins Pass: 70%
Start Quiz Now
Web Development intermediate

Modern JavaScript Challenge

Assess your skills in ES6+ syntax, asynchronous programming, and DOM interaction.

3 Questions 15 mins Pass: 60%
Start Quiz Now
Database & SQL beginner

SQL & Database Design Quiz

Evaluate your database query knowledge, joins, primary keys, and aggregations.

2 Questions 10 mins Pass: 70%
Start Quiz Now

Coding Practice Problems

Solve common interview algorithm and data structure problems.

Easy

Reverse a String

PYTHON

Write a function that takes a string input and returns the reversed string without using built-in reverse functions.

Starter Code (python) 
def reverse_string(s: str) -> str:
    # Your code here
    pass

# Test
print(reverse_string("CodingRider"))
Need a Hint & Solution?

Hint: Consider using a loop from the end of the string, or slicing: s[::-1]

Reference Solution: 
def reverse_string(s: str) -> str:
    return s[::-1]

print(reverse_string("CodingRider"))
Easy

Two Sum Problem

PYTHON

Given an array of integers `nums` and an integer `target`, return the indices of the two numbers such that they add up to `target`.

Starter Code (python) 
def two_sum(nums, target):
    # Your code here
    pass

print(two_sum([2, 7, 11, 15], 9))
Need a Hint & Solution?

Hint: Use a dictionary/hash map to store previously seen numbers and their indices.

Reference Solution: 
def two_sum(nums, target):
    seen = {}
    for i, num in enumerate(nums):
        diff = target - num
        if diff in seen:
            return [seen[diff], i]
        seen[num] = i
    return []

print(two_sum([2, 7, 11, 15], 9))
Easy

Palindrome Checker in JavaScript

JAVASCRIPT

Write a JavaScript function that determines whether a given word or phrase reads the same backward as forward.

Starter Code (javascript) 
function isPalindrome(str) {
    // Your code here
}

console.log(isPalindrome("racecar")); // true
console.log(isPalindrome("coding"));  // false
Need a Hint & Solution?

Hint: Remove non-alphanumeric characters, lowercase the string, and compare it to its reversed version.

Reference Solution: 
function isPalindrome(str) {
    const cleaned = str.toLowerCase().replace(/[^a-z0-9]/g, "");
    return cleaned === cleaned.split("").reverse().join("");
}

console.log(isPalindrome("racecar"));
console.log(isPalindrome("coding"));