C Developer

C Developer Interview Questions and Answers for Freshers

Updated 11 Sep 2024

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Q1. Merge K Sorted Arrays

You have been given ‘K’ different arrays/lists, which are sorted individually (in ascending order). You need to merge all the given arrays/list such that the output array/list should be sor...read more

Q2. String Transformation

Given a string (STR) of length N, you have to create a new string by performing the following operation:

Take the smallest character from the first 'K' characters of STR, remove it from STR...read more

Q3. Preorder traversal of a BST

You have been given an array/list 'PREORDER' representing the preorder traversal of a BST with 'N' nodes. All the elements in the given array have distinct values.

Your task is to con...read more

Q4. Sort 0 1 2

You have been given an integer array/list(ARR) of size 'N'. It only contains 0s, 1s and 2s. Write a solution to sort this array/list.

Note :

Try to solve the problem in 'Single Scan'. ' Single Scan' r...read more

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Q5. BST Delete

You are given a binary search tree (BST) and a key value 'K'. You need to delete the node with value 'K'. It is guaranteed that a node has the value 'K'.

A binary search tree (BST), also called an ord...read more

Q6. Find Maximum number possible by doing at-most K swaps

You are given an array of 'N' non-negative integers, representing the digits of a number, and an integer 'K'. Your task is to find the maximum possible numbe...read more

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Q7. Move Zeroes to End

Given an unsorted array of integers, you have to move the array elements in a way such that all the zeroes are transferred to the end, and all the non-zero elements are moved to the front. The...read more

Q8. How to delete the middle element of a linked list?

Ans.

To delete the middle element of a linked list, find the middle element using slow and fast pointers, then remove it by adjusting the pointers.

Use slow and fast pointers to find the middle element
Adjust pointers to skip the middle element and connect the surrounding nodes
Free the memory of the deleted node

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Q9. Difference between multi-programming and multi-tasking.

Ans.

Multi-programming involves running multiple programs on a single processor, while multi-tasking involves running multiple tasks within a single program.

Multi-programming allows multiple programs to be loaded into memory and executed concurrently, switching between them to utilize processor time efficiently.
Multi-tasking allows a single program to perform multiple tasks simultaneously, such as running multiple threads or processes within the program.
Examples of multi-programmi...read more