All Basic Articles

For Versus While

Question: Is there any example for which the following two loops will not work the same way? C /*Program 1 --> For loop*/ for… Read More

C-Loops & Control Statements

c-puzzle

C Language

Print reverse of a Linked List without actually reversing

Given a linked list, print reverse of it using a recursive function. For example, if the given linked list is 1->2->3->4, then output should be… Read More

Microsoft

DSA

Linked List

Leaders in an array

Write a program to print all the LEADERS in the array. An element is a leader if it is greater than all the elements to… Read More

Amazon

Payu

Arrays

DSA

Data Structures and Algorithms | Set 3

Following questions have asked in GATE CS exam. 1. Suppose you are given an array s[1…n] and a procedure reverse (s,i,j) which reverses the order… Read More

GATE-CS-2004

GATE-CS-DS-&-Algo

GATE CS

MCQ

C Program for Reversal algorithm for array rotation

Write a function rotate(arr[], d, n) that rotates arr[] of size n by d elements. Example: Input: arr[] = [1, 2, 3, 4, 5, 6,… Read More

rotation

Arrays

C Programs

DSA

Java Program For Array Rotation

Write a Java Program for a given array of integers arr[] of size N and an integer, the task is to rotate the array elements to the left by d positions. Examples: Input: arr[]… Read More

Java Programs

Program to count leaf nodes in a binary tree

A node is a leaf node if both left and right child nodes of it are NULL. Here is an algorithm to get the leaf node… Read More

Ola Cabs

DSA

Tree

Array Reverse in C/C++/Java/Python/JavaScript

Array reverse or reverse a array means changing the position of each number of the given array to its opposite position from end, i.e. if… Read More

Amazon

CBSE - Class 11

Infosys

MAQ Software

Moonfrog Labs

Reverse

school-programming

VMWare

Arrays

DSA

C Language | Set 2

Following questions have been asked in GATE CS exam. 1. Consider the following C program segment: char p[20]; char *s = "string"; int length =… Read More

GATE-CS-2004

GATE-CS-C-Language

GATE CS

MCQ

Data Structures and Algorithms | Set 1

Following questions have been asked in GATE CS exam 1. Let LASTPOST, LASTIN and LASTPRE denote the last vertex visited in a postorder, inorder and… Read More

GATE-CS-DS-&-Algo

GATE CS

MCQ

C Language | Set 1

Following questions have been asked in GATE CS exam. 1. Consider the following three C functions : [PI] int * g (void) { int x… Read More

GATE-CS-2000

GATE-CS-2001

GATE-CS-C-Language

GATE CS

MCQ

Given a linked list which is sorted, how will you insert in sorted way

Given a sorted linked list and a value to insert, write a function to insert the value in a sorted way.Initial Linked List Linked… Read More

Amazon

Insertion Sort

SAP Labs

Wipro

DSA

Linked List

Divide a string in N equal parts

Difficulty Level: RookieQuestion: Write a program to print N equal parts of a given string. Solution: 1) Get the size of the string using string function strlen()… Read More

DSA

Strings

Count number of bits to be flipped to convert A to B

Given two numbers A and B. Write a program to count the number of bits needed to be flipped to convert A to B. Examples: … Read More

Amazon

Bitwise-XOR

Qualcomm

Samsung

Bit Magic

DSA

Find the node with minimum value in a Binary Search Tree

Write a function to find the node with minimum value in a Binary Search Tree. Example: Input: first example BST Output: 8 Input: second example… Read More

Microsoft

Binary Search Tree

DSA

Tree

Java Program to Count set bits in an integer

Write an efficient program to count number of 1s in binary representation of an integer. Examples : Input : n = 6 Output : 2… Read More

Java Programs

Python Program to Count set bits in an integer

Write an efficient program to count number of 1s in binary representation of an integer. Examples : Input : n = 6 Output : 2… Read More

Python Programs

What is the purpose of a function prototype?

The Function prototype is necessary to serve the following purposes: Function prototype tells the return type of the data that the function will return. Function… Read More

C-Functions

c-puzzle

CBSE - Class 11

school-programming

C Language

Java Program for Reverse a linked list

Given a pointer to the head node of a linked list, the task is to reverse the linked list. We need to reverse the list… Read More

DSA

Java Programs

Linked List

If you are given two traversal sequences, can you construct the binary tree?

It depends on what traversals are given. If one of the traversal methods is Inorder then the tree can be constructed, otherwise not. … Read More

Binary Tree

tree-traversal

DSA

Tree