CareerCup

Maybe you fixed this already in 7th.

In 6th edition, question 4.11, the question only specifies a binary tree but the answer assumes a binary search tree. Which is exactly a thing you told us to look out for. So I was.

EDIT: Although this doesn't really seem to affect the answer.

Also, for the love of all things holy, invest in some spam-blocking on the forums!

You are given 2 Strings A and B. You have to transform A to become B.

Following are the type of transformation possible:

1. pick an alphabet and replace all occurrences of this alphabet in the string by the next alphabet in the sequence[a,b,c,d----y,z]. Note that the next alphabet for z is a. The whole operation counts as one operation with Cost C is given as input.

2.pick an alphabet and replace all occurrences of this alphabet in the string by the previous alphabet in the sequence[a,b,c,d----y,z]. Note that the next alphabet for a is z. The whole operation counts as one operation with Cost D is given as input.

You have to return the minimum cost to transform A to B. if it's not possible return -1

Example:
A: "ab"
B: "cc"
C:2
D:5

Answer : 4


we need two C operations "ab" -->"bb"-->"cc"

Note that the last step of converting all b to c counts as one operation

What can be a possible system design with classes & methods to compute who owes what ?for an application similar to splitwise -
A - > B - Transaction 1
A -> B - Transaction 2
-> C

Hi,

I've held the interview process at Amazon for a position in one of the european offices.

So I got contacted by a recruiter, I did an online test, afterwards a phone interview, after that on-premise interviews.

I had 4 on-premise interviews, each a one-on-one with a Software Manager, 2 of them were algorithms, 1 was architecture and another was Software Design.

After 2 weeks I received a call from the recruiter. She told me I've passed the interview process, but there was predicament and I will not be receiving an offer from the center I applied to, and I will receive an offer from another european office on the same day.

3 months have passed, I haven't received any offer and the recruiter stopped responding, I have sent several mails and still no reply.

I still don't know what happened, my resumee wasn't that good, was my application lost in the process.

I don't know if it's worth trying again, if things like this happen. I know I've spent a full month, preparing, not sleeping well. I've never felt prepared for the interviews, also I wasn't outstanding on them, going through that again seems a bit much.

What do you guys think, should I try again, has anyone else had the same experience?

creating a RESTful service using which players can play a simple game described
below.
The game should have the following rules:
• The player has an infinite amount of coins.
• The player bets 10 coins to play a normal game round.
• In any round (free or normal), the player has a 30% chance of winning back 20 coins.
• In any round (free or normal), the player also has a 10% chance of triggering a free round where
the player does not have to pay for bet. The free round works in the same way as a normal round except
it costs 0 coins. The free round should follow immediately after the normal round.
• The player can both win coins and free round at the same time.

got rejected, I think I did well for all rounds, maybe not behavioral questions. They didn't give any feedback.

the questions were not hard at all.

one round, I only got asked behavioral questions for 45 mins. really not that much to say

disappointed

i have phone screens of linkedin, vmware and msft lined up. Any suggestions whats the level of questions for phone screen ? also vmware hacker rank questions ?

Question:
You are given an information on Cat object such as name,height and weight. For eg following:

String[] names = {"a","b","c","d","e","f","g","h"};
Integer[] height = {31,24,67,12,45,21,31,12};
Integer[] weight = {120,124,160,130,175,120,124,142};

You have to write a method which takes the following input and return the list of Cat objects which satisfies the input criteria. For eg

searchCriteria could be : HEIGHT or WEIGHT
searchValue could be : Integer value of either HEIGHT or WEIGHT
symbol could be : "<" , ">", or "="

Amazon is known for its tough tech screening rounds but even if you nail those technical question with best possible solution, are you getting screwed??

Before this experience, I would have said NO but now it is looking different..

I was being picked up by their recruiter and asked to present myself for phone screening as they liked my experience (thats what they said ).

Now, I wouldnt mind.. being the fact that I am doing great in what I am doing.. its just a 1 hour call.

Well, call lasted for like 55 mins.. Was asked 2 algorithmic questions with code and follow ups and some pretty team / experience related question..

I nailed the tech rounds so much that the interviewer said, I got questions done with most optimal solutions and of course before time.

So, if they liked my experiences ( thats what they said they called me at first place).. Did they rejected me for same experience or Amazon interview has become a joking ground now?

Any thoughts??

1. Consider most important classes & ignore Interfaces as of now
2. FIDS is not about reservation system but the dasboard to display
3. the information will look like:

DEPARTURES
----------------------
Attributes:
STD, Airline,Flight#,Destination/Via,CheckInCounter#,Gate,Status,ETD

Values :
12:50,KingFisher,6E352,Hyderabad,A-B,23,Check-In Open,13:15

ARRIVALS
-----------------------
Attributes:
STA,Airline,Flight#,Destination/Via,Gate,Status,ETA

Values :
12:50,KingFisher,6E352,UK/Mumbai,Terminal2,Landed,13:15

Can someone tell me what are the coding and algorithm questions expected for Amazon QAE ?

The following is my code for MinHeap. But it is showing TLE for some input. Can someone please help me figure out where?

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

void swap(int *a,int *b){
int temp=*a;
*a=*b;
*b=temp;
return;
}

void heapify(vector<int> &heap,int index)
{
int length=heap.size();
int min=index;
int left=(index<<1)+1;
int right=(index<<1)+2;
if(left<length&&heap[left]<heap[min])
min=left;
if(right<length&&heap[right]<heap[min])
min=right;
if(min!=index)
{
swap(&heap[index],&heap[min]);
heapify(heap,min);
}
}

int main() {
int t,n;
string op;
scanf("%d",&t);
vector<int> heap;
while(t--) {
cin>>op;
//cout<<"Currently analysing"<<op<<"\n";
if(op=="insert") {
scanf("%d",&n);
heap.push_back(n);
int i=heap.size()-1;
while (i!=0&&heap[(i-1)>>1]>heap[i])
{
swap(&heap[i], &heap[(i-1)>>1]);
i =(i-1)/2;
}
}
else if(op=="getMin") {
if(heap.size()>0)
printf("%d\n",heap[0]);
else
printf("Empty\n");
/*for(int i=0;i<heap.size();i++)
cout<<heap[i]<<" ";
cout<<"\n";*/
}
else {
if(heap.size()>0)
{
heap.erase(heap.begin());
heapify(heap,0);
}
}
}
return 0;
}

At Amazon.com, users log in and access random pages numbered as 1,2,3… Given at any time, you need to tell the most popular sequence of 3 pages visited by users.

Eg.
At some time t,
U1: P1, P2, P3, P8, P1, P2
U2: P8, P1, P2
O/P: P8, P1, P2

At time t+1, say
U1: P1, P2, P3, P8, P1, P2, P3
U2: P8, P3, P2
O/P: P1, P2, P3

Anyone has some sample questions of in-person interview for a data Engineer at Amazon,
Thanks,

There are around 40 million files in a directory which needs to be transferred to another system via FTP in order of oldest file first. What's the ideal way to iterate over files and store it in a data structure from where it can be transferred?

A mission-critical production system has n stages that have to be performed sequentially; stage
i is performed by machine Mi. Each machine Mi has a probability ri of functioning reliably and
a probability 1 − ri of failing (and the failures are independent). Therefore, if we implement
each stage with a single machine, the probability that the whole system works is r1 · r2 · · · rn.
To improve this probability we add redundancy, by having mi copies of the machine Mi that
performs stage i. The probability that all mi copies fail simultaneously is only (1 − ri)mi, so the
probability that stage i is completed correctly is 1 − (1 − ri)mi and the probability that the whole
system works is Qni=1(1 − (1 − ri)mi). Each machine Mi has a cost ci, and there is a total budget
B to buy machines. (Assume that B and ci are positive integers.)
Given the probabilities r1, . . . , rn, the costs c1, . . . , cn, and the budget B, find the redundancies
m1, . . . , mn that are within the available budget and that maximize the probability that the
system works correctly

We need to implement a data-structure for following functions
Insert X : Insert an element X into the set.

Delete X : Delete an element X from the set. It is guaranteed that such X always exist in the data structure.
Mean : Report Mean of the elements present in the data set. It is guaranteed that data structure will not be empty at this query.
Mode : Report Mode of the elements present in the data set. It is guaranteed that data structure will not be empty at this query.
Median : Report Median of the elements present in the data set. It is guaranteed that data structure will not be empty at this query

I had created a linked list of the values, and like insertion sort I inserted the elements in the Linked List. Deletion was also the same as deletion in Linked List. Mean I calculated on the run as and when the values came. For mode I traversed the whole linked list to see which element occurs the most. Median was the middle element in the linked list.

I know there is an efficient algorithm to calculate median on the run using two heaps (min and max) but calculating mode was the biggest problem I faced. The number of queries ranged to 10^5 and the time limit was given 3 secs. Had a TLE error

Which is the best time to apply for the Google fall 2017?

Which is the best time to apply for the Google fall 2017?

Hello,

I'm planning to go through big IT companies interviews (basically the GAFAs) in 8 months from now, and I would like to get some suggestions about ideas of projects I can work on to present during my interviews and build up my résumé.

I ideally looking for a project that would make me practice the OOP principles like SOLID, as well as other things like scalability, algorithms and data structures and so on.

Thanks in advance for your suggestions.