Program to print triangle pattern of numbers and stars (*)

Write a program to print triangle pattern of numbers and stars (*). In this program i’ll show how to create triangle pattern of numbers , stars (*) . These type of questions are very important in terms of interviews as well.

Multiply Two Numbers without using * (Multiplication Operator)

Write a C program to multiply two numbers without using * multiplication operator.

Given two numbers, both numbers are positive.  Write a program to multiply two numbers without using * multiplication operator.  Think for a moment how to solve this problem .

You can use multiple approaches to find the solution of a problem.

C Program to Multiply Two Numbers without using *

C Program to Multiply Two Numbers without using *

Reverse a Linked List using Recursion

Write a program to reverse a linked list using recursion. Given a singly linked list, we have to write a code to reverse a linked list using recursion. This question is mostly asked in interviews.

In my previous post, I have explained how to reverse a linked list using an iterative approach. In this post, We will learn how to reverse a linked list using recursion.  The time complexity for both iterative and recursive approach is O(n). 

C Program to Print Fibonacci Series using Recursion

Write a C program to print Fibonacci Series using recursion. Given an input number, we have to write a code to print Fibonacci series up to that number using Recursion.

This question is very important in terms of technical interviews.

You can check my previous post for PHP script to print Fibonacci series in PHP.

What is Recursion?

In recursion, A function calls itself until the base condition is reached. Recursive code is much cleaner and shorter as compared to iterative code.
For better understanding you can my previous post on recursion and what’s the difference between recursion and iteration.

For practice, you can solve Objective Question on Recursion

Find Missing number in Array – Programming Problem

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.

Count Number of Nodes in a Linked List

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

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.

Swap Two Numbers using Call by Reference in C

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.