How to find missing number in array of 1 to n. This question is generally asked in technical interviews. The problem statement is something like that. Given an array of numbers from 1 to 100. The array is sorted. One number is missing from an array. You have to find the missing number from an array. Also there is no duplicates in an array.
Write a c program to count number of nodes in a linked list. In this tutorial, We are going to write a c code to count the number of nodes in a linked list.
What is Linked List?
A linked list is a collection of nodes, each pointing to next node by means of a pointer. In linked list, each node consists of two parts, a data and a pointer to next node.
C Program to Count Number of Nodes in a Linked List
An Algorithm to Count Number of Nodes in a Linked List
i) Take a count variable and initialize it to zero, count = 0.
ii) Traverse a linked list and increment a count variable.
iii) When a node points to a null, it means we reach at end of a linked list then return the value of a count variable.
How to swap two numbers using call by reference in C , C++. In the interviews interviewer generally asked the difference between call by reference and call by value. In this post let’s understand what is call by reference and how to swap two numbers using call by reference method.
Write a c program to reverse a string without using strrev function. Given an input string, we have to write a method to reverse a string. In c, you can simply reverse a string using an inbuilt strrev() function. But we don’t have to use this method.
Think how do you solve this problem. In this tutorial, we write a c code to reverse a string using stack, pointers, recursion, loop.
Write a program to implement a stack using linked list. In my last post, I have explained the implementation of a stack data structure using an array. In this post, I’ll explain how to implement a stack data structure using linked list.
Binary Search is a searching algorithm that finds the value in a sorted array in O(logN) time complexity. In my previous post i discuss how to implement binary search using iterative method. In this post i’ll explain how to implement binary search using recursion.
Binary Search Program, Algorithm & their Time Complexity. In this tutorial, You’ll learn about binary search algorithm, how it’s useful in searching and the time complexity of a binary search.
A Binary Search is used to search an element in a sorted array. Binary search is also known as half-interval search or logarithmic search. It works by comparing a value (value needs to search) to the middle element an array. If a value matches with the middle element then the position is returned otherwise the algorithm repeats if the value is less than or greater than the middle element.
A Binary search algorithm is efficient than the linear search algorithm. The time complexity of binary search is O(log(n)).
Find Pair of Elements in an Array whose Sum is Equal to given number. Given an array of n integers and a number x, We have to write a code to find a pair of elements(a,b) in an array whose sum is equal to a given number x.
Write a C program to count number of words in a string. Given an input string, we have to write a code to count number of words in a string. The words in a string are separated by space(‘ ‘).
Write a program to print middle element of a linked list. It is also the most asked question in interviews. I assume you have a basic understanding of linked list and it’s concept.