## Recent Interview Questions

- 0of 0 votes

AnswersDescribe the Flyweight and Visitor design pattern with example

- bharsaklemukesh975 September 22, 2019 in India| Report Duplicate | Flag | PURGE

Qualcomm Software Engineer / Developer Object Oriented Design - 0of 0 votes

AnswersYou 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).

- bharsaklemukesh975 September 22, 2019 in India

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.| Report Duplicate | Flag | PURGE

Qualcomm Software Engineer / Developer Operating System - 0of 0 votes

AnswersConsider the following 3D scene representing an old town's main square:

- bharsaklemukesh975 September 22, 2019 in India

• 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?| Report Duplicate | Flag | PURGE

Qualcomm Software Engineer / Developer Graphics - 0of 0 votes

AnswersThere 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.

- acharyashailendra1 September 19, 2019 in India

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| Report Duplicate | Flag | PURGE

SDE-2 - 0of 0 votes

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

- acharyashailendra1 September 19, 2019 in India

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)| Report Duplicate | Flag | PURGE

SDE-2 - 0of 0 votes

AnswerGiven 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.

- acharyashailendra1 September 19, 2019 in India

e.g.

Input : 00101 (Represents Target)

Output : 3

Explanation :

00000 -> 00111 -> 00100 -> 00101| Report Duplicate | Flag | PURGE

SDE-2 - 0of 0 votes

AnswersGiven 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:

- Notagoodcoder September 19, 2019 in United States

(P(C()())(C()())) P is for Parent, C is for child. if parent has one child : (P(C()())()) if parent has no child : (P()())| Report Duplicate | Flag | PURGE

Samsung - 0of 0 votes

AnswersCreate Valid html from below input.

- samfriendcom1234 September 18, 2019 in United States

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.| Report Duplicate | Flag | PURGE

xyz SDE1 - 0of 0 votes

AnswersN 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.

- xyz September 15, 2019 in United States

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.| Report Duplicate | Flag | PURGE

Allegient SDE-2 Algorithm - 0of 0 votes

Answershow 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

- Dhioyt September 14, 2019 in United States| Report Duplicate | Flag | PURGE

HackerEarth - 2of 2 votes

AnswersDesign 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.

- adr September 12, 2019 in United States| Report Duplicate | Flag | PURGE

Software Engineer System Design - 1of 3 votes

AnswersA 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.

- Prashanthwagle360 September 08, 2019 in India

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| Report Duplicate | Flag | PURGE

HackerEarth Problem Setter Algorithm - 1of 1 vote

AnswersGiven 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.

- Nits September 07, 2019 in United States| Report Duplicate | Flag | PURGE

Facebook Software Development Manager Algorithm - 0of 0 votes

AnswersNext 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.

- anoophky September 06, 2019 in United States

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| Report Duplicate | Flag | PURGE

- 0of 0 votes

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

- anoophky September 06, 2019 in United States

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| Report Duplicate | Flag | PURGE

- 0of 0 votes

Answeryou are given string of digits, a value x and N. you have to divide that string in ((i-1)*x+1,min(i*x)) parts.

- acharyashailendra1 September 05, 2019 in India

for example a String is ="1234567891" and x=5,N=10 then

there will be 2 partition of string since x=5

[12345] end [67891]

you have to find kth min number from these combinations. for example k=3 then ans should be 17

combination will happen like every digit from 1st partition will concanate with other partition digits

so if there were three partition for string 123456789 then it could be like

[123][456][789]

and if k=3 then ans would be 149| Report Duplicate | Flag | PURGE

- 0of 0 votes

Answersrecently I came across one good design question. I need your thoughts how to proceed. Assume a big IT hub, like any co-work space / Microsoft / amazxon/ google etc office (which has multiple floors , each floor has multiple meeting rooms , work stations etc) . At any point of time , an admin should be able to know 1. how many people are there in that facility 2. How many people at each floor wise 3. If he chooses any cons room, he must be able to fetch how many people in that conf room at that time . This normally used for any kind of evacuation etc

- gopi.komanduri September 02, 2019 in United States

I tried with http protocol , but interviewer said http is over kill , he hints on some IoT communication etc .. however , want to know what is the best way to solve it| Report Duplicate | Flag | PURGE

System Design - 0of 0 votes

AnswersA string can contain only a, b or c. There cannot be 2 consecutive same character. First and the last character cannot be the same. Now given a string with ‘a’, ‘b’, ‘c’ or ‘?’. We need to find the string replacing ‘?’ that satisfy the above conditions. For multiple-answer display lexicographically smallest string. For no answer possible display “Not Possible”.

- anoophky August 31, 2019 in India| Report Duplicate | Flag | PURGE

Directi SDE1 String Manipulation - 0of 0 votes

Answersrepeat string n^n times without using extra space

- acharyashailendra1 August 30, 2019 in India| Report Duplicate | Flag | PURGE

Myntra - 0of 0 votes

AnswerDesign and implement rate limiter for limiting api calls for a service distributed multiple users.

- acharyashailendra1 August 27, 2019 in India| Report Duplicate | Flag | PURGE

SDE-2 - 0of 0 votes

AnswerDesign data structures which support millions of products coming in streaming manner, we need to find at any moment what are top n products at any day

- acharyashailendra1 August 27, 2019 in India| Report Duplicate | Flag | PURGE

SDE-2 - 0of 0 votes

AnswersYou run a linux binary provided by a customer and don’t get any output. The customer assures you it should provide output. You don’t have the source code for this binary. How would you debug this? What tools / techniques can you use ? *

- donk August 26, 2019 in United States for Engineering| Report Duplicate | Flag | PURGE

Notfamous Technical Support Engineer Unix - 0of 0 votes

AnswerA customer raises a support ticket as they have a serious situation which has caused them data loss. You determine the issue is a bug in the product which is already fixed in a later version. Please write a response to the customer support ticket.

- donk August 26, 2019 in United States for Engineering| Report Duplicate | Flag | PURGE

Notfamous Technical Support Engineer Trouble shooting - -1of 1 vote

AnswersAs you know, most Operating Systems are written in Java, what’s special about pointers in Java ? *

- donk August 26, 2019 in United States for Engineering| Report Duplicate | Flag | PURGE

Notfamous Technical Support Engineer Java - 0of 0 votes

AnswersHow would I store 100 million documents (~40 Gigabytes) in 32 Gigabytes of RAM? The documents are in JSON format. In other words how do couchbase, redis, and mongodb work in memory?

- donk August 26, 2019 in United States for Engineering| Report Duplicate | Flag | PURGE

Notfamous Technical Support Engineer Cache - 0of 0 votes

AnswersA co-ordinate plane was given. On each point (x, y) there are x+y number of apples on it. A person is standing on (0, 0) and he wants to buy a square plot having N number of apples inside it (including the periphery). Question was to return the value of perimeter of that square plot given N.

- 200MITTALGAUTAM August 26, 2019 in India| Report Duplicate | Flag | PURGE

Amazon SDE1 - 2of 2 votes

AnswerA dictionary is combination of characters from a-z. let's say a=1,b=2.. and so on z=26. you are given n and k. you have to find sum of length k from given combination.

- acharyashailendra1 August 21, 2019 in India

for example n=51 and k=3 then your answer should be =axz

as there can be many combination for given sum so it is suggested to print those string which comes first in dictonary| Report Duplicate | Flag | PURGE

LendingKart SDE-2 Data Structures - 1of 1 vote

Answersbeautiful numbers are those numbers which contains digit only 4 and 5 also they are palindrome.length of number can't be odd. for example

- acharyashailendra1 August 21, 2019 in India

44,55,4554 are beautiful numbers where as 38, 444 are not.

your task is to find nth number in this series. let's say if n=4 then output should be 4554. for n=1 output will be 44 always.| Report Duplicate | Flag | PURGE

LendingKart SDE-2 Data Structures - 2of 2 votes

AnswersA mobile phone company wants to deploy network of cell towers to provide good signal coverage for its customers. But it doesn't want to have too many towers because they can interfere with one another. All towers are laid out over a 2-dimensional surface and that towers have same sized circular signal zone. You can determine whether their signal zones will overlap in 0 1) time. Give a parallel algorithm for choosing maximal subset of towers that cover non-overlapping areas.

- MaryJane August 19, 2019 in United States

I was not sure if this can be solved using DP?| Report Duplicate | Flag | PURGE

Google Software Engineer - 0of 0 votes

AnswersWhat data structure will you use to suggest friends in FB

- Nits August 19, 2019 in India| Report Duplicate | Flag | PURGE

RazorPay Software Development Manager

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