questions.txt

# Beginner Coding Practice Set (Level 2 → 3)

This set contains **30 beginner-friendly coding questions** across:

- Algorithms (10)
- Data Structures (10)
- Basic CS / Logic Problems (10)

---

## ⭐ Algorithms (10 Problems)

1. **Sum of Array Elements**  
   Write a program that takes an array of numbers and returns the sum of all elements.

2. **Find the Largest Number**  
   Given an array of integers, return the maximum number.

3. **Count Even and Odd Numbers**  
   Given a list of integers, count how many are even and how many are odd.

4. **Reverse a Number**  
   Write a program to reverse the digits of a given integer.  
   Example: `1234 → 4321`

5. **Check Palindrome Number**  
   Check if a number reads the same forward and backward.

6. **Factorial of a Number**  
   Write a function that returns `n!` (factorial of n).

7. **Fibonacci Sequence (First N Terms)**  
   Print the first `N` numbers of the Fibonacci sequence.

8. **Linear Search**  
   Search for a target value inside an array and return its index (or `−1`).

9. **Count Occurrence of a Number**  
   Given an array and a value, count how many times the value appears.

10. **Check Prime Number**  
    Write a program to check if a number is prime.

---

## ⭐ Data Structures (10 Problems)

1. **Insert into an Array**  
   Insert a value at a given index in an array.

2. **Delete from an Array**  
   Remove an element at a given index.

3. **Find Length of Array (Without Built-in Length)**  
   Count the number of elements manually.

4. **Stack Implementation (Push & Pop)**  
   Simulate a stack using an array.

5. **Queue Implementation (Enqueue & Dequeue)**  
   Simulate a queue using an array.

6. **Reverse an Array**  
   Reverse the elements of an array in-place.

7. **Find Second Largest Element**  
   Return the second highest number in an array.

8. **Check if Array is Sorted**  
   Return true if elements are in increasing order.

9. **Merge Two Sorted Arrays**  
   Combine two sorted arrays into one sorted array.

10. **Find Duplicate Elements in an Array**  
    Print all numbers that appear more than once.

---

## ⭐ Basic Computer Science / Logic Problems (10)

1. **Swap Two Numbers (Without Using Third Variable)**  
   Swap the values of two variables.

2. **Count Digits in a Number**  
   Return how many digits a number has.

3. **Sum of Digits of a Number**  
   Example: `123 → 1+2+3 = 6`

4. **Find ASCII Value of a Character**  
   Input → character  
   Output → ASCII code

5. **Convert Lowercase to Uppercase**  
   Example: `"a" → "A"`

6. **Simple Calculator**  
   Take two numbers and an operator (`+ − * /`) and compute the result.

7. **Grade Calculator**  
   Take marks and print grade: `A/B/C/D/Fail`.

8. **Print Multiplication Table**  
   Example: print the table of `5`.

9. **Check if a Year is Leap Year**  
   Return true/false.

10. **Count Vowels in a String**  
    Given a string, count how many vowels it contains.

---
NOOBS

# Super-Beginner Mixed Coding Questions (Level 1–2)

1. **Add Two Numbers From Input**  
   Take two numbers as input and print their sum.

2. **Check If Number Is Even or Odd**  
   Input a number and print `Even` or `Odd`.

3. **Check If Two Numbers Are Equal**  
   Input 2 numbers.  
   Print `Equal` or `Not Equal`.

4. **Find the Smallest of Three Numbers**  
   Input 3 numbers and print the smallest one.

5. **Input an Array and Print It**  
   Read `N`, then read `N` numbers into an array and print them.

6. **Check If a Number Exists in an Array**  
   Input array + a number.  
   Print `Found` or `Not Found`.

7. **Pass or Fail**  
   Input marks.  
   If marks ≥ 40 → `Pass`, otherwise `Fail`.

8. **Count How Many Times Zero Appears in an Array**  
   Given an array, count all the zeros.

9. **Add All Numbers From 1 to N**  
   Given `N`, find the sum `1 + 2 + ... + N`.

10. **Check Positive, Negative or Zero**  
    Input a number.  
    Print `Positive`, `Negative`, or `Zero`.

11. **Find the First and Last Element of an Array**  
    Input an array and print its first and last elements.

12. **Replace All Negative Numbers With Zero in an Array**  
    Modify the array.

13. **Check If Character Is a Digit**  
    If input is 0–9 → print `Digit`, else `Not Digit`.

14. **Find the Larger of Two Numbers**  
    Input 2 numbers and print the bigger one.

15. **Count Spaces in a Sentence**  
    Input a sentence and count the spaces.

16. **Sum of First 3 Numbers**  
    Read 3 numbers and print their total.

17. **Check If Number Is a Multiple of 5**  
    Print `Yes` if it is, else `No`.

18. **Count How Many Elements in Array Are Greater Than 10**  
    Return the count.

19. **Check If String Is Empty**  
    If length is 0 → print `Empty`.

20. **Multiply Two Numbers Without Using * Operator**  
    Use repeated addition.