PeopleFeed HR Android Developer Interview Questions and Answers

Q1. Basic details like as previous employment, academic
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Q2. Discussion about salary
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Q1. How to make box segment
Ans. 
A box segment can be made by cutting a box into two parts along one of its faces.
• Choose a face of the box to cut along

• Use a saw or knife to cut through the box along the chosen face

• Sand the edges of the cut to smooth them out if necessary
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Q2. Different Question about major bridge
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Q1. They had asked some questions of Solar sector...
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Q1. Discuss about Some personal questions as well as Location details
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Round duration - 105 minutes
Round difficulty - Medium

There were 3 problems .
One was easy but the other two were of medium level.

Q1. 
Aggressive Cows Problem Statement
Given an array representing positions of stalls and an integer ‘K’ representing the number of aggressive cows, determine the largest minimum distance between any two cows ...read more
Ans. 
The problem requires assigning aggressive cows to stalls in a way that maximizes the minimum distance between any two cows.
• Sort the array of stall positions in ascending order.

• Use binary search to find the largest minimum distance between cows.

• Check if it is possible to assign cows with this minimum distance by iterating through the sorted array.

• If it is possible, update the maximum distance and continue binary search ...read more
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Q2. 
Shortest Path in an Unweighted Graph
The city of Ninjaland is represented as an unweighted graph with houses and roads. There are 'N' houses numbered 1 to 'N', connected by 'M' bidirectional roads. A road...read more
Ans. 
The problem is to find the shortest path between two houses in an unweighted graph.
• The graph represents the city of Ninjaland with houses connected by roads.

• The input consists of the number of test cases, number of houses and roads, starting and ending house, and the roads between houses.

• The output is a vector of nodes representing the shortest path from the starting house to the ending house.

• If there are multiple shor...read more
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Q3. 
Count Set Bits Problem Statement
Given a positive integer N, compute the total number of '1's in the binary representation of all numbers from 1 to N. Return this count modulo 1e9+7 because the result can...read more
Ans. 
The task is to count the total number of '1' in the binary representation of all numbers from 1 to N.
• Convert each number from 1 to N into its binary representation

• Count the number of '1' bits in each binary representation

• Sum up the counts of '1' bits for all numbers

• Return the sum modulo 1e9+7
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Round duration - 60 minutes
Round difficulty - Easy

The interviewer was very polite and straightforward. 
Firstly he introduced himself and then asked me to introduce myself and then he jumped to the coding problems.
After the coding problems, he asked some questions from the OS and DBMS.

Q1. 
Reverse Words in a String: Problem Statement
You are given a string of length N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o...read more
Ans. 
The task is to reverse the words in a given string, removing any leading or trailing spaces and replacing multiple spaces between words with a single space.
• Split the string into words using spaces as delimiters

• Reverse the order of the words

• Join the reversed words with a single space between them

• Remove any leading or trailing spaces
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Q2. 
Reverse Linked List in Groups of K
You are provided with a linked list containing 'N' nodes and an integer 'K'. The task is to reverse the linked list in groups of size K, which means reversing the nodes ...read more
Ans. 
The task is to reverse a linked list in groups of size K.
• Iterate through the linked list in groups of size K

• Reverse each group using a helper function

• Connect the reversed groups to form the final reversed linked list
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Round duration - 60 minutes
Round difficulty - Medium

The interviewer was very polite and straightforward, firstly he introduce himself and then ask me to introduce myself and then ask some ques on my projects and then he jumps to the coding problems.

Q1. 
Remove Consecutive Duplicates From String Problem Statement
Given a string STR consisting of both lower and upper case characters, your task is to remove consecutive duplicate characters from the string a...read more
Ans. 
The task is to remove consecutive duplicate characters from a given string and return the new string.
• Iterate through the characters of the string

• Compare each character with the next character

• If they are the same, skip the next character

• If they are different, add the current character to the new string

• Return the new string
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Q2. 
Maximum Path Sum in a Matrix
Given an N*M matrix filled with integer numbers, determine the maximum sum that can be obtained from a path starting from any cell in the first row to any cell in the last row...read more
Ans. 
The question asks to find the maximum sum that can be obtained from a path starting from any cell in the first row to any cell in the last row of a given matrix.
• Iterate through each cell in the first row and calculate the maximum sum path ending at that cell

• For each cell, calculate the maximum sum path ending at that cell by considering the three possible directions

• Store the maximum sum path ending at each cell in a se...read more
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Q1. What is the windows?
Ans. 
Windows is an operating system developed by Microsoft that provides a graphical user interface and multitasking capabilities.
• Windows is a widely used operating system for personal computers.

• It allows users to interact with their computer through a graphical interface.

• Windows supports multitasking, allowing multiple programs to run simultaneously.

• It provides a wide range of software applications and tools for various pu...read more
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Q1. What is map
Ans. 
A map is a higher-order function that applies a given function to each element in a collection, returning a new collection.
• Transforms each element: For example, using map on [1, 2, 3] with x => x * 2 results in [2, 4, 6].

• Immutable: The original array remains unchanged after applying map.

• Common in functional programming: Used in languages like JavaScript, Python, and Ruby.

• Can be used with complex data: For instance, ...read more
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Q2. What is linked list
Ans. 
A linked list is a linear data structure where elements are stored in nodes, each pointing to the next, allowing dynamic memory allocation.
• Consists of nodes, each containing data and a reference (or pointer) to the next node.

• Types include singly linked lists, doubly linked lists, and circular linked lists.

• Singly linked list example: 1 -> 2 -> 3 -> NULL.

• Doubly linked list example: NULL <- 1 <-> 2 <-...read more
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Reasoning, aptitude, Dsa and basic mcq coding questions

Group discussion with 5 to 6 person total

Q1. Tower of hanoi problem Dsa
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Q2. Aggressive cows problem Dsa
Ans. 
Aggressive cows problem involves placing cows in barns to maximize minimum distance between them.
• Use binary search to find the optimal distance between cows.

• Start with a minimum distance of 0 and maximum distance of the largest possible distance.

• Check if it is possible to place cows with the given distance, if not decrease the distance, if yes increase the distance.
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Q1. Tell your achievements
Ans. 
Developed a mobile app that increased user engagement by 30% and received an award for best innovation in tech.
• Developed a mobile app that increased user engagement by 30%

• Received an award for best innovation in tech
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Q2. Where do you see yourself in x years
Ans. 
In x years, I see myself as a senior software developer leading a team of talented individuals, working on cutting-edge technologies.
• Continuing to enhance my technical skills and knowledge through continuous learning and training

• Taking on more leadership responsibilities and mentoring junior developers

• Contributing to the development of innovative software solutions and driving the success of projects

• Possibly pursuing a...read more
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