SDE - 1

Kevin has two sorted packs of cards. The first pack has N cards and the second one has M cards. Every card has an integer written on it. Now, you have to tell two things. First, how many different types of cards does Kevin have with both packs(union). Second, how many types both the packs have in common(intersection).

Note :

Two cards are said to be of different types if they have different numbers written on them.

Given an array ‘arr’ of integer numbers, ‘arr[i]’ represents the number of pages in the ‘i-th’ book.

There are ‘m’ number of students, and the task is to allocate all the books to the students.

Allocate books in such a way that:

1. Each student gets at least one book.
2. Each book should be allocated to only one student.
3. Book allocation should be in a contiguous manner.

You have to allocate the book to ‘m’ students such that the maximum number of pages assigned to a student is minimum.

If the allocation of books is not possible, return -1.

Example:

Input: ‘n’ = 4 ‘m’ = 2 
‘arr’ = [12, 34, 67, 90]

Output: 113

Explanation: All possible ways to allocate the ‘4’ books to '2' students are:

12 | 34, 67, 90 - the sum of all the pages of books allocated to student 1 is ‘12’, and student two is ‘34+ 67+ 90 = 191’, so the maximum is ‘max(12, 191)= 191’.

12, 34 | 67, 90 - the sum of all the pages of books allocated to student 1 is ‘12+ 34 = 46’, and student two is ‘67+ 90 = 157’, so the maximum is ‘max(46, 157)= 157’.

12, 34, 67 | 90 - the sum of all the pages of books allocated to student 1 is ‘12+ 34 +67 = 113’, and student two is ‘90’, so the maximum is ‘max(113, 90)= 113’.

We are getting the minimum in the last case.

Hence answer is ‘113’.

Given a singly linked list of integers. Your task is to return the head of the reversed linked list.

For example:

The given linked list is 1 -> 2 -> 3 -> 4-> NULL. Then the reverse linked list is 4 -> 3 -> 2 -> 1 -> NULL and the head of the reversed linked list will be 4.

Follow Up :

Can you solve this problem in O(N) time and O(1) space complexity?

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.

1.What is virtual memory
2.WHat is segmentation
3.WHat is deadlock
4.WHat are semaphores 
5.What are the conditions of deadlock.

1.ACID properties of DBMS
2.What are the differences between a DBMS and RDBMS?
3.What is normalization and what are the different types of normalization?