Paxcom India Software Developer Interview Questions, Process, and Tips

Round duration - 50 Minutes
Round difficulty - Easy

50 questions - 1 hour

Q1. 
Problem Statement: Largest Island
You are provided with a non-empty grid consisting of only 0s and 1s. Your task is to determine the maximum area of an island within the given grid.
An island consists of a...read more
Ans. 
Find the maximum area of an island in a grid of 0s and 1s.
• Iterate through the grid and perform depth-first search (DFS) to find connected 1s.

• Keep track of the area of each island found and return the maximum area.

• Consider all four directions (horizontal, vertical, and diagonal) while exploring the island.

• Handle edge cases like grid boundaries and already visited cells during DFS.

• If no island is present, return 0 as the
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Round duration - 60 Minutes
Round difficulty - Easy

2 question of coding - 1 hour

Q1. 
Circular Move Problem Statement
You have a robot currently positioned at the origin (0, 0) on a two-dimensional grid, facing the north direction. You are given a sequence of moves in the form of a string ...read more
Ans. 
Determine if a robot's movement path is circular on a 2D grid given a sequence of moves in the form of a string.
• Create a variable to track the robot's position (x, y) and direction (north, east, south, west).

• Iterate through the move sequence and update the position and direction based on the current move.

• Check if the robot returns to the starting position after completing the move sequence.

• Return true if the robot ends
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Q2. 
Character Frequency Problem Statement
You are given a string 'S' of length 'N'. Your task is to find the frequency of each character from 'a' to 'z' in the string.
Example:
Input:
S : abcdg
Output:
1...read more
Ans. 
The task is to find the frequency of each character from 'a' to 'z' in a given string.
• Create an array of size 26 to store the frequency of each character from 'a' to 'z'.

• Iterate through the string and increment the count of the corresponding character in the array.

• Print the array of frequencies as the output for each test case.
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Round duration - 20 Minutes
Round difficulty - Easy

Introduction
Projects
DBMS
Oops

Q1. 
Digit Count In Range Problem Statement
Given an integer K, and two numbers A and B, count the occurrences of the digit K in the range [A, B].
Include both the lower and upper limits in the count.
Input:
...read more
Ans. 
Count occurrences of a digit in a given range.
• Iterate through the range [A, B] and count occurrences of digit K.

• Convert integers to strings for easier digit comparison.

• Handle edge cases like when A or B is equal to K.

• Optimize by considering the position of K in the range.
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Q2. 
Reverse the String Problem Statement
You are given a string STR which contains alphabets, numbers, and special characters. Your task is to reverse the string.
Example:
Input:
STR = "abcde"
Output:
"e...read more
Ans. 
Reverse a given string containing alphabets, numbers, and special characters.
• Iterate through the string from the end to the beginning and append each character to a new string.

• Alternatively, you can use built-in functions like reverse() or slicing in some programming languages.

• Remember to handle different types of characters like alphabets, numbers, and special characters.

• Ensure to consider the constraints on the input
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Round duration - 40 Minutes
Round difficulty - Easy

 Introduction
 Projects (describe all mention in resume)
 Polymorphism (definition, types and real world example)
 Joins (left & right)
 Use of groupby
 JVM (JDK & JRE)

Q1. 
Missing Number Problem Statement
You are provided with an array named BINARYNUMS consisting of N unique strings. Each string represents an integer in binary, covering every integer from 0 to N except for ...read more
Ans. 
Find the missing integer in binary form from an array of unique binary strings.
• Iterate through the binary strings and convert them to integers.

• Calculate the sum of all integers from 0 to N using the formula (N*(N+1))/2.

• Subtract the sum of integers in the array from the total sum to find the missing integer.

• Convert the missing integer to binary form and return it as a string.
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Q2. 
Find Two Missing Numbers Problem Statement
Given an array of unique integers where each element is in the range [1, N], and the size of the array is (N - 2), there are two numbers missing from this array....read more
Ans. 
Given an array of unique integers with two missing numbers, identify and return the missing numbers.
• Iterate through the array and mark the presence of each number in a separate array.

• Find the missing numbers by checking which numbers are not present in the marked array.

• Return the missing numbers in increasing order.
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