## Software Developer Interview Questions

- -1of 1 vote

AnswersGiven a list of characters, write a function to output a list of length of minimum non overlapping subsequences that can partition the input list.

- akira January 25, 2018 in United States

For example:

Input : [a,b,c]

Output: [1,1,1]

Explanation: There are no repeated characters.

Input : [a,b,c,a]

Output: [4]

Explanation: The 'a' is repeated so one subsequence is between a to last a.

Input : [a,b,c,b,a,e,b,a,d,f,g,d,f,i,f,k,l,m,n,m,l]

Output: [8,7,6]

Explanation: max length from 1st 'a' to last 'a' is 8.

1st 'f' to last is 6 adding d to it = 7

so on| Report Duplicate | Flag | PURGE

Amazon Software Developer Algorithm - 0of 0 votes

Answersfrom robot movement tell final position of robot...

- kishanvadalia.vadalia January 09, 2018 in India

testcases:

"ULDLLUDL"

"UP 2xDOWN LEFT 4xRIGHT"| Report Duplicate | Flag | PURGE

Goldman Sachs Software Developer - 0of 0 votes

Answers"Implement a job scheduler which takes in a function `f` and an integer `n`, and calls `f` after `n` milliseconds."

- lkjhgfdsa December 10, 2017 in United States

That's it. :)| Report Duplicate | Flag | PURGE

Apple Software Developer - 0of 0 votes

AnswersIs Quicken Customer Service The Finest Customer Care?

- servicefortechhelp December 07, 2017 in United States| Report Duplicate | Flag | PURGE

BPD Software Developer - 0of 0 votes

AnswersIs Quicken Customer Service The Finest Customer Care?

- servicefortechhelp December 07, 2017 in United States| Report Duplicate | Flag | PURGE

BPD Software Developer - 1of 1 vote

AnswersThe time taken by ith person to complete a task is Ki minutes.

- viksvampire19 December 03, 2017 in India

A company wants to finish N tasks given K persons each if their given time. Find minimum time to complete N tasks using K persons. There is no waiting time between the tasks switching. Persons can start their tasks simultaneously.

For N=3 and K=2,

Input:

3 2

1

2

Output:

2

Explanation:

Person 1 will start task 1 at t=0. Person 2 will start task 2 at t=0.

At t=1, Person 1 will switch to 3rd task finishing its first task.

By the end of 2 minutes, all 3 tasks will be finished. So, minimum time taken is 3 minutes.| Report Duplicate | Flag | PURGE

Software Developer - 0of 0 votes

AnswerGiven a string of size n consisting of 0s and/or 1s.you have to perform k queries and there are two types of queries possible.

- vejon December 02, 2017 in United States

"1"(without quotes): Print length of the longest substring with all '1'.

"2 X"(without quotes): where X is an Integer between 1 to n.In this query, you will change character at Xth position to '1' (it is possible that the character at ith position was already '1')

Input Format:

First Line of input contains n and k, where n is string length and k is the number of queries.

Next line contains a string of 0's and/or 1's of length n.

Each of next k lines contains query of any one type (i.e 1 or 2).

Output Format: For each query of type 1, print in new line the maximum size of subarray with all 1's.

Example Input:

5 7

00000

1

2 3

1

2 5

1

2 4

1

Example Output:

0

1

1

3| Report Duplicate | Flag | PURGE

Google Software Developer - 0of 0 votes

Answers3. Complete the following function-

- Rising star November 30, 2017 in India

Node * alternateReverse( Node* head1, Node*head2){

// code goes here

}

Where ‘Node’ is the structure of a linked list node defined as:

struct Node{

int data;

struct Node *next;

};

alternateReverse() must remove the even number nodes from the linked list and append them to the end in reverse order. No extra space was allowed. It was for 5 marks.

Example:

Input-1->2->3->4->5->6

Output-1->3->5->6->4->2

Input-1->2->3->4->5->6->7->8->9

Output-1->3->5->7->9->8->6->4->2| Report Duplicate | Flag | PURGE

Microsoft Software Developer - 0of 0 votes

AnswersSuppose you have an input character stream (StreamReader) and you have a list of pattens like ABCAS, ASGKT. KHTSD etc. You need to read the stream one by one character and you need to keep count on number of each pattern found so far and when EOF occures just print all the patterns along with count.

- Hitesh November 16, 2017 in India

Example:

Input String: 011100010

Pattern 1: 011

Pattern 2: 010

Output:

011 => 1

010 => 1| Report Duplicate | Flag | PURGE

Freight Tiger Software Developer Algorithm - 0of 0 votes

AnswersYou are given a rooted tree. The tree is not necessarily binary. The tree contains N nodes, labeled 1 to N. You are given the tree in the form of an array P[1..N] of size N. P[i] denotes label of the parent of node labeled i. For clarity, you may assume that the tree satisfies the following conditions.

- evostorm96 November 15, 2017 in India

The root of the tree is labeled 1. Hence P[1] is set to 0.

The parent of node T will always have a label less than T. Hence P[i] < i will always be true.

All nodes contain a mutable value (or, more simply, a variable), which is initially set to 0.

You are asked to perform several operations of the following type

ADD X Y: add Y to the value at node X.

ADDUP X Y: add Y to the value at node X. Then, add Y to the value at P[X] (i.e. the parent of X). The, add Y to the value at P[P[X]] (i.e. the parent of P[X]).. and so on, till you add Y to the value at root.

After you have performed all the given operations, you are asked to answer several queries of the following type

VAL X: print the value at node X.

VALTREE X: print the sum of values at all nodes in the subtree rooted at X (including X).

Input

The first line of input contains the number T, the number of test cases. Then follows the description of T test cases. The first line of each test case contains the numbers N, M and Q respectively (separated by single space character). N depicts the number of nodes. M depicts the number of operations you must perform. Q depicts the number of queries you must answer.

The next N lines contain a number each, depicting the array P[1..N]. Of course the number on the first such line is always 0.

The next M lines contain description of the respective operation. An operation will be either "ADD X Y" or "ADDUP X Y" (without the quotes). Please refer to the problem statement and sample I/O explanation for clarity on the meaning of the operations.

After the operations, the next Q lines contain description of the queries. A query will be either "VAL X" or "VALTREE X" (without the quotes). Please refer to the problem statement and sample I/O explanation for clarity on the meaning of the queries.

Output

Print the result of each query on a line by itself. Since the answer for some queries may be too large, please print the result modulo 1,000,000,007. Do not print any blank lines between test cases.

Constraints

1 ≤ T ≤ 10

1 ≤ N ≤ 50000

1 ≤ M ≤ 50000

1 ≤ Q ≤ 50000

1 ≤ X ≤ N

1 ≤ Y ≤ 50000

The input file will be smaller than 2 MB.

Sample Input

2

5 5 3

0

1

1

1

3

ADD 1 10

ADD 2 20

ADD 3 30

ADD 4 40

ADDUP 5 50

VAL 3

VALTREE 3

VALTREE 1

7 4 5

0

1

2

2

2

1

2

ADD 6 76

ADDUP 1 49

ADD 4 48

ADDUP 2 59

VALTREE 1

VALTREE 5

VAL 5

VALTREE 2

VAL 2

Sample Output

80

130

250

291

0

0

107

59

Explanation

In the first sample case, at the end of app the operations, the values at each of the nodes is as follows

1: 60

2: 20

3: 80

4: 40

5: 50

Also, the sum of the values of all the nodes in the subtree rooted at each of the nodes is as follows

1: 250

2: 20

3: 130

4: 40

5: 50| Report Duplicate | Flag | PURGE

Directi Software Developer - 0of 0 votes

AnswersYou are given a grid with 3 rows and N columns. Each cell in the grid contains the value 0 initially. You perform several operations of the following type on the grid

- evostorm96 November 15, 2017 in India

Pick a row, say r. Pick a start column and end column, say s and e. Of course 1 ≤ s ≤ e ≤ N. Now, set all values in the grid in row r, from column s to column e to 1.

After you perform all the operations, you wish to find subgrids in this grid (or rectangles, if you please) which contain only 1s. Most importantly, you wish to find the rectangle that has the largest area. Print the area of this rectangle.

Input

The first line of input contains a number T, the number of test cases. The first line of each test case contains the number N and M respectively, separated by a single space. N is the number of columns in the grid. M is the number of operations you perform on the grid. Each of the next M lines contain three integers R, C1 and C2 respectively to describe the operation. R is the row in which the operation is performed. C1 and C2 are the start and end columns respectively. You may assume that 1 ≤ C1 ≤ C2 ≤ N.| Report Duplicate | Flag | PURGE

Directi Software Developer - 0of 0 votes

AnswersImplement zad-off-chu sequence for LTE eNodeB in c language?

- subhraprakash79 November 14, 2017 in United States| Report Duplicate | Flag | PURGE

Qualcomm Software Developer C - -2of 2 votes

AnswersThere was given total physical energy H and total distance D. Five pace information speed and corresponding physical energy was given. Find the minimum time that is required in order to complete total distance D making sure that some of the physical energy does not exceed H

- sonuanand2007 November 11, 2017 in India| Report Duplicate | Flag | PURGE

Samsung Software Developer - 0of 0 votes

AnswersRobot hand movement

- akira November 08, 2017 in United States

Given a (1) string message (consisting of only upper case alphabets), and (2) width of keyboard, output the movements required by an automated robot hand to print out the string message.

The robot hand can move right, left, up or down. It cannot move diagonally.

Ex 1:

String message: “HI”

Width: 26

Output: R8, T, R1, T

Ex2:

String message: “HELLO”

Width: 13

Output: R8, T, L3, T, R7, T, T, D1, L10, T| Report Duplicate | Flag | PURGE

Software Developer Algorithm - 0of 0 votes

AnswersGiven a set of strings (denoting URLs), like:

- lkjhgfdsa October 27, 2017 in United States

1. abc.pqr.google.com

2. pqr.google.com

3. pqr.google.net

4. yahoo.com

5. abc.yahoo.com

etc...

find an efficient way to find out how many times a particular string appears as a substring. For e.g., given the above set of strings, "google.com" appears twice; ".com" appears four times, "pqr.google.com" appears twice, and so on.

Follow up: How would you do this, if the input was no longer a URL (So, "abc.pqr.google.com" and "pqr.abc.google.com", both are valid)?| Report Duplicate | Flag | PURGE

Google Software Developer - 2of 2 votes

Answersnode {

- ajay.raj October 23, 2017 in United States

node * left, * right;

}

Given a list of node to determine whether the node in the list can form a valid binary tree. several points of judgment

1. need to ensure that all left, right pointer point to the node inside list

2. no cycle

3. All node must be connected

Boolean isValidTree(List<Node> list){}| Report Duplicate | Flag | PURGE

Facebook Software Developer - 1of 1 vote

AnswersGiven a matrix of N * M, given the coordinates (x, y) present in a matrix,

- ajay.raj October 23, 2017 in United States

Find the number of paths that can reach (0, 0) from the (x, y) points with k steps (requires exactly k, k> = 0)

From each point you can go up, down, left and right in four directions.

For example, the following matrix:

----------

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

(x, y) = (1, 1), k = 2, the output is 2| Report Duplicate | Flag | PURGE

Facebook Software Developer - 0of 0 votes

AnswersGiven a non-negative integer n, check if it is possible to build a pyramid of '*' and empty spaces where first row has one '*' and second has three '*' and so on.

- akira October 19, 2017 in United States

For example-

Input: n =4 Output: True

Explanation : The pyramid can be build

*

***

Input: n = 9 Output: True

Explanation : The pyramid can be build

*

***

*****

Input: n = 6 Output: False

Explanation : The pyramid cannot be build as last row will be incomplete

*

***

**| Report Duplicate | Flag | PURGE

Nutanix Software Developer Algorithm - 0of 0 votes

AnswersalphaAndarabic

- howard25330 October 13, 2017 in United States

given a set of character, ex: 'A' 'B' 'C',

each char have its representative number:

A = 1, B = 13, C= 110;

when the char next to current index is smaller than current we add ex: CBA = 110+13+1

when the char next to current index is bigger than current we all the answer in prev will become minus sign(but not the last one) ABC -1 - 13 + 110 = 96;

calculate the number for each string input;| Report Duplicate | Flag | PURGE

Epic Systems Software Developer - -2of 6 votes

AnswersHow will you test "Hello world" program?

- gagan.ping October 12, 2017 in India| Report Duplicate | Flag | PURGE

Google Software Developer Algorithm - 0of 0 votes

AnswersHow to Design Netflix.(System Design)

- mayankesh911 September 30, 2017 in India| Report Duplicate | Flag | PURGE

Amazon Software Developer System Design - 0of 0 votes

AnswersHow to Design App-Store like google play.(System Design)

- mayankesh911 September 30, 2017 in India| Report Duplicate | Flag | PURGE

Amazon Software Developer System Design - 0of 0 votes

AnswersGiven an array of strings, find out in how many cases is any of the anagrams of the string at location i, a substring of the string at location i+1.

- lkjhgfdsa September 30, 2017 in United States

Test Case I: ["ab", "ab", "abc", "bca"]

Answer: 3

Test Case II: ["ab","aqb"]

Answer: 0| Report Duplicate | Flag | PURGE

Google Software Developer Algorithm - 0of 0 votes

AnswersGiven a target sum, populate all subsets, whose sum is equal to the target sum, from an int array.

- milincjoshi September 28, 2017 in United States

For example:

Target sum is 15.

An int array is { 1, 3, 4, 5, 6, 15 }.

Then all satisfied subsets whose sum is 15 are as follows:

15 = 1+3+5+6

15 = 4+5+6

15 = 15| Report Duplicate | Flag | PURGE

Google Software Developer - 0of 0 votes

AnswersGenarate and validate a magic matrix.A magic matrix is one in which the sum of every row,column,and every diagonal is same.One such matrix will be when every element in the matrix is same.generate and validate a magic matrix where every element is not the same

- prashant.tah September 27, 2017 in India| Report Duplicate | Flag | PURGE

Oracle Software Developer - 0of 0 votes

AnswersYou are given a stream of numbers which represent the stock prices of a company with timestamp. You need to perform some set of operations on the stream of data efficiently as below: 1. findStockPriceAtGivenTimeStamp(Timestamp) 2. deleteAndGetMinimumStockPriceForToday() Timstamp: 1 2 3 . 4 . 5 Prices: 12 34 4 . 1 . 18

- bholeNath September 18, 2017 in India| Report Duplicate | Flag | PURGE

Amazon Software Developer Data Structures - 1of 1 vote

AnswersWrite algorithm for java grep command for word matching in the following context.Given a file containing n words.Given a word w and a number k.Find k words in the file occuring before occurence of w.Assume that the average word size is m in the file

- prashant.tah September 12, 2017 in India

eg.

aaa

bbb

ccc

booking

alpha

beta

gamma

for k=3 and w = booking

the output should be [aaa,bbb,ccc,booking]

similarly for k =2 and w = beta

output should be [booking,alpha,beta]

Assume that the file size can grow very large

and try to get solution with space complexity lesser than O(n)

I suggessted solution for iterating through file until the word w is found and maintaiining a queue of size K

The time complexity of my solution was O(nm)

and space complexity was O(k) .Any answers to improve the time and space complexity

Apparently they were looking for a better implementation of grep| Report Duplicate | Flag | PURGE

Booking.com Software Developer Algorithm - 1of 1 vote

AnswersWe start with a list of Integers. We can remove a group of integers from the list if the all but one equals the remaining number. This removal operation can be performed in the remaining number of list until no more operations can be performed.

- ajay.raj September 07, 2017 in United States

Write a function which can accept an array of integers, and return the minimal number of remaining integers from performing this operation.

Example [1, 3, 5, 6] -> remove 1, 5, 6 , because 1 + 5 = 6, thus only [3] left, so return 1

[48, 20, 1, 3, 4, 6, 9, 24] -> remove 3, 6, 9 , because 3 + 6 = 9, and remove 4, 20, 24, 48, because 4 + 20 + 24 + 48, thus only [1] left, so return 1

int left(int[] nums){

}| Report Duplicate | Flag | PURGE

Facebook Software Developer - 0of 0 votes

AnswersConsider an N*N game board, with a black and white pieces that can be placed on it. You are given a board with placed pieces around it in a random spots.

You need to implement a function that determines if a piece (black or white) is captured on a given coordination (x, y).

A piece is defined as captured by the following rules:

1. If all sides (up, down, left & right) contains an opposite piece that surrounds/blocking it.

2. If some of the sides are blocked (for example, right and down) and the other ones are out of bound (OOB defined for coords: x: <= 0, y: <= 0) it's considered as blocked.

3. If one of the sides is empty, it's free.

4. If one of the sides contains the same piece type, and that piece is not captured (by the rules above), it's free.

5. Note that pieces may be captured in a clustered way (related to #4).

For example, consider the following coordinates:

coord(1,1) = B

coord(1,2) = W

coord(2,1) = W`X | 1 | 2 1 | B | W 2 | W |`

For the given coordination 1,1 the result would be `captured` (true).

Another example, consider the following coordinates:

coord(2,2) = W

coord(2,3) = W

coord(3,1) = W

coord(3,2) = B

coord(3,3) = B

coord(3,4) = W

coord(4,2) = W

coords(4,3) = W`X | 1 | 2 | 3 | 4 | 5 | 2 | E | W | W | W | E 3 | W | B | B | B | W 4 | E | W | W | W | E`

For the given coordination 3,2 (or 3,3) the result would be `true` (captured).

If we would either remove one of the W coords (thus making it empty), or change it to be a B piece, the result would be `false` (not captured).

As basic primitive, you are provided with a function that translates coordination into its state:

- johanson1 September 06, 2017 in Netherlands`getState (x, y) == Black, White, Out Of Bound, Empty`

| Report Duplicate | Flag | PURGE

Booking.com Software Developer Algorithm

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