Software Developer

You are given an integer ‘N’ , calculate and print the sum of :

LCM(1,N) + LCM(2,N) + .. + LCM(N,N) 

where LCM(i,n) denotes the Least Common Multiple of the integers ‘i’ and ‘N’.

Given a N * N matrix and the task is to check matrix is idempotent matrix or not.

See the sample input.

Idempotent matrix M follows the following property :

M*M = M

Given a number of ropes say ‘N’ and an array of integers of size ‘N’ containing the length of ropes. Your task is to connect the ropes into one. The cost to connect two ropes is equal to the sum of their lengths. Find the minimum cost for connecting all the ropes.

To Construct a House-Rental Application. There are two types of users. Owner and Buyer. The owner can list his/her house for selling or rent by giving suitable parameters. The Buyer can search for houses and has the feature to contact the owner of the house for further Negotiations.

Questions on all basic commands in SQL.
Questions on PL SQL Queries too.
Questions on Normalization.

Explain Inheritance and Polymorphism?
Is Multi-Level Inheritance Possible in Java?
Explain Packages and Interfaces?
Explain classes and Objects?
What is a super class?

Difference between Greedy and DP
Explain a DP problem.
Why all problems cant be solved with Greedy Approach?
Questions on Time Complexity.
Explain Sorting Algorithms.

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' refers to iterating over the array/list just once or to put it in other words, you will be visiting each element in the array/list just once.

Are you a team player?

What is your biggest failure?