CareerCup

Given an array of positive and negative integers {-1,6,9,-4,-10,-9,8,8,4} (repetition allowed) sort the array in a way such that the starting from a positive number, the elements should be arranged as one positive and one negative element maintaining insertion order. First element should be starting from positive integer and the resultant array should look like {6,-1,9,-4,8,-10,8,-9,4}

Given a binary array {0,1,1,0,0,1,0,0,1} , sort the array in a way that all zeros come to the left and all the one's come to the right side of the array.

Design a service to scan photos/videos for any malware

Design APIs around, storing into and retrieving from, an Amazon Warehouse locker.

- Each item will fully occupy one Amazon locker
- Always keep track of how many remaining lockers are available after each API call

Amazon has N buildings on the site, building ID ranged from 0 to N-1
Every employee has an office space in one of the buildings.

Now employee may make a request to move from current building X to
another building Y. A moving request is noted by

Class Request{
String employee names;
int from building;
int to building;
}

Initially all buildings are full. A request from building X to building Y is
achievable only if someone in building Y made an achievable requests to
move away and therefore creates a vacancy

Given a wishlist of requests, help us plan for the best way of building
swaps. A plan that fulfill the maximum number requests is considered
the best
Output is a list of employee names on cyclic swaps.

For Ex:
Input :

List<Request requests{
<"Alex" 1, 2>,
<"Ben", 2, 1>,
<"Chris", 1, 2>,
<"David", 2, 3>,
<"Ellen", 3, 1>,
<"Frank", 4, 5>
}

Expected Output:

List<List>
[ ["Alex","Ben"],["Chris","David","Ellen"] ]

Can someone please help me how to solve this one?

Suppose two arrays are given A and B. A consists of integers and the second one consists of 0 and 1.
Now a operation is given - You can choose any adjacent bits in array B and you can toggle these two bits ( for example - 00->11, 01->10, 10->01, 11->00) and you can perform this operation any number of times.
The output should be the sum of A[0]*B[0]+A[1]*B[1]+....+A[N-1]*B[N-1] such that the sum is maximum

During the interview, my approach to this problem was to get the maximum number of 1's in array B in order to maximize the sum.
So to do that , I first calculated the total number of 1's in O(n) time in B. Let count = No. Of 1's=x
Then I started traversing the array and toggle only if count becomes greater than x or based on the elements of array A(for example : Let B[i]=0 and B[i+1]=1 & A[i]=51 and A[i+1]=50
So I will toggle B[i] B[i+1] because A[i]>A[i+1])

But the interviewer was not quite satisfied with my approach and was asking me further to develop a less time complex algorithm.

Can anyone suggest a better approach with lesser time complexity??

Write a method that merges a fixed number of streams containing an infinite sequence of monotonically increasing integers into an output stream of monotonically increasing integers. It is important to note that the input stream are infinite, so any solution based on the length of the streams would be considered incorrect.

Note that the question was given in the context of Java with the below code given as the base contract for the method.

public void merge(List<Stream> inputStreams, Stream outputStream) {
	// Implement me
}

This was also provided as the definition of "Stream" in this case, and not what is defined in java.util.stream.Stream.

interface Stream {
	
	// Retrieves but does not remove the next item from the stream
	int peek();

	// Retrieves and removes the next item from the stream.
	int poll();

	// Puts an item into the stream
	void put(int i);
}

Design a data structure for json objects. Json objects consist of key:value pairs. And here the value can be int, array or another json object.

Write test cases for earring with diamond, gold clamp, diameter 13mm, width 4mm

Given a set of horizontal and vertical line segments, find the number of squares formed by them?

Implement union and intersection of two array(in a efficient way).

Additional information given by the interviewer was: elements of the two given array may be repeated but cannot be repeated in union and intersection array.

find nearest word from the given non-english dictionary which is one off character. (could be non ascii characters)
for eg. dictionary contains { apple, pineapple, banana, orange }

if given word "applx" then return true, as applx matches with apple and only one character is off.
aplpe returns false

Given a square (n x n) matrix which only contains 0 and
1. Find the minimum cost to reach from left most column to rightmost column.
Constraints/rules:
a. Starting point: You can start from any cell in the left most column i.e. (i, 0) where i can be between 0 and n( number of rows/ columns)
b. Destination: You can reach any cell in the rightmost column i. e ( k, n) where k can be anything between 0 and n.
c. You cannot visit a cell marked with 0.
d. Cost is defined as the sum of cells visited in path.
e. You can move up, down, left and right but not diagonally.

For example,
take 2x2 matrix
1 | 0
1 | 1

One possible path is 00 -- 10 -- 11 with cost 3
Other one is 10 -- 11 with cost 2
so minimum cost on this case is 2.

What is the next number in the series 16,24,54,115

What is the next number in the series 76,24,54,115

Describe the Flyweight and Visitor design pattern with example

You have a vector of 128 floats (float data[128]) in shared memory, an environment with 8 threads and a convenient function called barrier() that will block on each thread until it will be signaled by all 8 threads (a simple semaphore of 8 elements).

Write a pseudo-C parallel function that calculates the sum of all 128 elements storing it inside data[0]; the function can alter/destroy the content of the other 127 elements of data[].

thread_id goes from 0 to 7: it is constant and unique for each of the 8 threads.

Consider the following 3D scene representing an old town's main square:
• A single statue
o static geometry, high polygon count
o low complexity fragment shader
• A particle system simulating smoke
o animated, rendered as a large set of points
• A small set of characters
o animated geometry, medium polygon count
o medium complexity fragment shader
• A large set of buildings
o static geometry, low polygon count
o low complexity fragment shader
• A background image/skybox
• The camera/viewpoint is continuously moving within the scene.

How would you render the statue - by itself – using OpenGL to achieve maximum vertex performance (vertices/second)?

How would you render the particle system - by itself - using OpenGL to achieve maximum vertex performance (vertices/second)?

How would you render the scene - as a whole - most efficiently on a GPU using OpenGL?

Given that the 3D scene was being rendered correctly but that you wanted to improve the performance further, how would you determine if the main performance limitation/bottleneck was located in the application, in the vertex processing stage, or in the fragment processing stage?

There are cards and each card has an identity. e.g. HC1 has ID 1, this ID also represents the cost of the card. Your sister already have some cards and you want to gift her cards which she do not have already. Program is to return the max number of cards you can buy for her.

Constraint : You have amount d, and want to buy as many distinct card as you can.

e.g. Sister Cards = [2, 3, 5], D : 7 Card you buy : 1, 4

Output : 2

You have been given a special and normal status of alphabets.

e.g. “01111001111111111011111111” represents “abcdefghijklmnopqrstuvwxyz”. Here 0 represents normal character and 1 represents special character.

Given an Input String S and a number k, find the maximum continuous sub array with maximum k number of number elements. There is no constraint on special character.

e.g.

S = “giraffe”, K = 1, “011110011111111110111111”

Output : 3

How ?

normal characters : a, g, f

one of the possible solution : gir (as this has only one normal character)

Given a binary String which represents the target state. Minimum number of flips needed to convert a same size Binary String (with all 0’s) to target state. A flip also causes all the right bits to be flipped.

e.g.

Input : 00101 (Represents Target)

Output : 3

Explanation :

00000 -> 00111 -> 00100 -> 00101

Given a level K , you have to find out the sum of data of all the nodes at level K in a binary tree. Input is given as:
(P(C()())(C()())) P is for Parent, C is for child. if parent has one child : (P(C()())()) if parent has no child : (P()())

Create Valid html from below input.

String str="abcde"

points:- [{0,2,b},

{2,4,u}]

output : <b>ab<u>c</u></b><u>de</u>

Explanation:- character from 0 to 2 index should be bold, 2 to 4 index should be underline. Tricky point is that character at index 2 should be both bold and underline.

N cows are standing at the origin on x-axis, each cow has some appetite, in other word hunger index. A cow can sleep of 1 unit of time or eat for one unit of time or move left or move right. There are some vessels placed on the x-axis, they are having infinite supply of fiod. Find minimum time in which all cows appetite would be filled.

Input:
cow Apetitte = {1,1}
Vessle locations = {-1,1}
Answer would be 2 since both cow can go in different direction they would eat for one seconds. One second for moving and one second for eating.

This problem looks to be similar to rotten eggs/tomatoes.

how to find the fastest xor of large subarray or given range?

print(reduce(xor,arry[qury[1]-1:qury[-1]]))

but it's not working for larger input

Design a voting system. 100M users will be logging in within a window of 24h (not necessarily uniformly). Every user will be able to choose from a fixed list of options. If the user has already voted the system should not let them to vote a second time. Additional constraint: only the first 100K votes are accepted. If the quota is exceeded any attempt to vote should be rejected.

A special palindrome is a palindrome of size N which contains atmost K distinct characters such that any prefix between the size 2 to N-1 is not a palindrome.
You need to count the number of special palindromes
For example, abba is a special palindrome with N=4 and K=2 and ababa is not a special palindrome because aba is a palindrome and its a prefix of ababa.
If N=3, K=3, possible special palindromes are aba, aca, bab, bcb, cac and cbc. So answer will be 6.

Input format
Two integers N and K

Output format
Answer modulo 10^9+9

Constraints
1<=N,K<=10^9

Sample TC
3 3

Output
6

Given a length n, count the number of strings of length n that can be made using ‘a’, ‘b’ and ‘c’ with at-most one ‘b’ and two ‘c’s allowed.

Next Sunday is Ayan’s 4th birthday and a lot of guests are invited for his birthday celebration. All of them are getting gifts for Ayan and his y-1 number of siblings. There are x number of guests coming to the party and each of them presented each kid some integer number of gifts (possibly zero). The guests are numbered with integers from 1 to x and all kids are numbered with integers from 1 to y. For all 1 ≤i ≤x the minimum number of gifts, which i-th guest presented to some kid is equal to gi and for all 1 ≤j ≤y the maximum number of gifts, which j-th kid received from some guest is equal to kj.

Let ai,j be the number of gifts which the i-th guest give to the j-th kid. Then gi is equal exactly to the minimum among values ai,1,ai,2,…,ai,y and kj is equal exactly to the maximum among values g1,j,g2,j,…,gx,j.



You are interested in the minimum total number of gifts that guests could present, so you need to minimize the sum of ai,j for all (i,j) such that 1 ≤i ≤x and 1 ≤j ≤y. You are given the numbers g1,…,gx and k1,…,ky, determine this number.

Input Format

The first line contains two integers x and y, separated with space — the number of guests and kids, respectively (2≤x,y≤100000). The second line contains x integers g1,…,gx, separated by spaces — gi is equal to the minimum number of gifts, which i-th guest presented to some kid (0≤gi≤1000). The third line contains y integers k1,…,ky, separated by spaces — kj is equal to the maximum number of gifts, which j-th kid received from some guest (0≤kj≤1000).

Output Format

If the described situation is impossible, print −1. In another case, print the minimum total number of gifts, which guests could have presented and all conditions could have satisfied.

Sample Input

3 2

1 2 1

3 4

Sample Output

12

Mr. Stark is the owner of Stark industries, a manufacturer of weaponry.

A local Mafia group has hijacked one of the factories in the desert.

The mafias want to transport the weapons from the factory to their base camp, and use a single truck to do it.

But, every kilometer the truck travels with the weapons, one weapon falls off and breaks. The truck can only travel integral values of distance, and will lose 1 weapon for every km travelled.

The weapons can be unloaded at any point from the truck, and can be picked up again later.

Given the number of weapons X, max capacity of the truck Y and distance between the factory and the base Z, find the maximum number of weapons that can be transferred intact from the factory to the mafia base.



Function Description:

findMaxWeapons function takes the following parameters:

X - the number of weapons

Y - max capacity of the truck

Z - distance between the factory and the base