Practice Top 30 C++ Programming Questions on Vector

Practice Top 30 C++ Programming Questions on Vector

Q1. Write a program to initialize a vector with five integers and display its elements.

Input: None  
Output: Vector: [1, 2, 3, 4, 5]

Q2. Write a program to add integers to a vector and display its elements.

Input: 10 20 30  
Output: Vector: [10, 20, 30]

Q3. Write a program to access the first and last elements of a vector.

Input: Vector: [5, 10, 15]  
Output: First: 5, Last: 15

Q4. Write a program to display the size of a vector.

Input: Vector: [7, 8, 9]  
Output: Size: 3

Q5. Write a program to iterate through a vector using a for loop.

Input: Vector: [1, 2, 3, 4]  
Output: 1 2 3 4

Q6. Write a program to clear all elements from a vector and display its size.

Input: Vector: [10, 20, 30]  
Output: Size after clear: 0

Q7. Write a program to check if a vector is empty.

Input: Vector: []  
Output: Vector is empty.

Q8. Write a program to modify specific elements in a vector.

Input: Vector: [1, 2, 3] (Change 2 to 20)  
Output: Modified Vector: [1, 20, 3]

Q9. Write a program to insert an element at a specific position in a vector.

Input: Vector: [1, 3, 4], Insert 2 at position 1  
Output: Vector: [1, 2, 3, 4]

Q10. Write a program to erase an element from a vector.

Input: Vector: [10, 20, 30], Erase element at position 1  
Output: Vector: [10, 30]

Q11. Write a program to find the maximum element in a vector.

Input: Vector: [2, 5, 1, 7]  
Output: Max: 7

Q12. Write a program to find the minimum element in a vector.

Input: Vector: [3, 9, 4]  
Output: Min: 3

Q13. Write a program to reverse the elements of a vector.

Input: Vector: [1, 2, 3, 4]  
Output: Reversed Vector: [4, 3, 2, 1]

Q14. Write a program to sort the elements of a vector in ascending order.

Input: Vector: [9, 4, 7, 3]  
Output: Sorted Vector: [3, 4, 7, 9]

Q15. Write a program to sort the elements of a vector in descending order.

Input: Vector: [2, 5, 1]  
Output: Sorted Vector: [5, 2, 1]

Q16. Write a program to find the sum of all elements in a vector.

Input: Vector: [2, 4, 6]  
Output: Sum: 12

Q17. Write a program to check if a specific element exists in a vector.

Input: Vector: [1, 2, 3], Search: 2  
Output: Element found.

Q18. Write a program to remove duplicate elements from a vector.

Input: Vector: [1, 2, 2, 3]  
Output: Vector: [1, 2, 3]

Q19. Write a program to concatenate two vectors.

Input: Vectors: [1, 2], [3, 4]  
Output: Concatenated Vector: [1, 2, 3, 4]

Q20. Write a program to replace all occurrences of a specific value in a vector.

Input: Vector: [1, 2, 2, 3], Replace 2 with 5  
Output: Vector: [1, 5, 5, 3]

Q21. Write a program to remove the last element from a vector.

Input: Vector: [4, 5, 6]  
Output: Vector: [4, 5]

Q22. Write a program to resize a vector to a given size.

Input: Vector: [1, 2, 3], Resize to 5  
Output: Vector: [1, 2, 3, 0, 0]

Q23. Write a program to store and display a vector of strings.

Input: ["apple", "banana", "cherry"]  
Output: apple banana cherry

Q24. Write a program to create and display a 2D vector.

Input: [[1, 2], [3, 4]]  
Output: 1 2\n3 4

Q25. Write a program to sort a vector in custom order using a comparator.

Input: Vector: [10, 5, 20] (Sort by descending order)  
Output: Vector: [20, 10, 5]

Q26. Write a program to copy elements of one vector to another.

Input: Vector: [1, 2, 3]  
Output: Copied Vector: [1, 2, 3]

Q27. Write a program to find the intersection of two vectors.

Input: [1, 2, 3] and [2, 3, 4]  
Output: Intersection: [2, 3]

Q28. Write a program to erase a range of elements from a vector.

Input: Vector: [1, 2, 3, 4], Range: 1 to 3  
Output: Vector: [1, 4]

Q29. Write a program to count the occurrences of a specific element in a vector.

Input: Vector: [1, 2, 2, 3], Count 2  
Output: Occurrences: 2

Q30. Write a program to generate a vector of n elements with values from 1 to n.

Input: n = 5  
Output: Vector: [1, 2, 3, 4, 5]