DEV IT Senior Full Stack Developer Interview Questions and Answers

Q1. Nornam Java , spring boot questions
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Round duration - 2 hours
Round difficulty - Medium

In the 1st round 
Aptitude
Reasoning
English
Automata fix( code debug) 
Timing in morning
Environment is good
Interviewer was very cool and interactive

Q1. 
Encode the Message Problem Statement
Given a text message, your task is to return the Run-length Encoding of the given message.
Run-length encoding is a fast and simple method of encoding strings, repres...read more
Ans. 
Implement a function to encode a text message using run-length encoding.
• Iterate through the message and count consecutive characters

• Append the character and its count to the encoded message

• Handle edge cases like single characters or empty message
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Round duration - 30 minutes
Round difficulty - Medium

This is interview round 
Ques from basic electronics
C language

Q1. 
Print Name and Age Problem Statement
Create a class named Person with a string variable 'name' and an integer variable 'age', such that these variables are not accessible outside the class. Implement a me...read more
Ans. 
Create a class Person with private variables name and age, and methods to set and get their values.
• Create a class Person with private variables 'name' and 'age'.

• Implement a method setValue to set the variables' values.

• Implement a method getValue to print the variables' values.

• Ensure the name is a non-empty string and the age is a non-negative integer.

• Encapsulate the data and provide a clear interface for setting and ge
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Q1. Java Collection, OOPS, Seralization
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Q1. Java OOPS, Collection, threading, SQL
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Q1. Nothing specific, Salary Negotiations.
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Round duration - 60 Minutes
Round difficulty - Easy

It was a hangout video call. The interviewer asked me these questions. Tell me about yourself and 1 coding question.

Q1. 
Special Numbers Problem Statement
Your task is to find the total count of special numbers within a range from 1 to a given integer, 'MAXVAL'. A special number is defined as a number whose digits, when rot...read more
Ans. 
Count the total number of special numbers within a given range by rotating digits 180 degrees.
• Create a function to check if a number is a special number by rotating its digits.

• Iterate through the range from 1 to MAXVAL and count the special numbers.

• Handle the digit rotation mapping for 0, 1, 6, 8, 9.

• Return the count of special numbers for each test case.
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Round duration - 60 Minutes
Round difficulty - Easy

This was an On-site (Behavioural Round) interview. He asked me these questions.

Round duration - 60 Minutes
Round difficulty - Easy

This was another On-site ( DS & Algo) algorithm.

Q1. 
Covid Vaccination Distribution Problem
As the Government ramps up vaccination drives to combat the second wave of Covid-19, you are tasked with helping plan an effective vaccination schedule. Your goal is...read more
Ans. 
Given constraints, find max vaccines administered on a specific day during a vaccination drive.
• Iterate through each test case and calculate the maximum number of vaccines distributed on the specified day.

• Distribute vaccines evenly across days while maximizing the number on the specified day.

• Ensure that the sum of vaccines administered does not exceed the maximum allowed.

• Consider edge cases like when the number of days ...read more
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Round duration - 60 Minutes
Round difficulty - Easy

Another On-site ( DS & Algo) interview.

Q1. 
Painter's Partition Problem Statement
Given an array/list representing boards, where each element denotes the length of a board, and a number ‘K’ of available painters, determine the minimum time required...read more
Ans. 
Determine the minimum time required to paint all boards with given constraints.
• Use binary search to find the minimum and maximum possible time to paint all boards.

• Iterate through the boards and assign them to painters based on the time constraints.

• Calculate the total time taken to paint all boards with the assigned painters.
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Q2. 
Chocolate Distribution Problem
You are given an array/list CHOCOLATES of size 'N', where each element represents the number of chocolates in a packet. Your task is to distribute these chocolates among 'M'...read more
Ans. 
Distribute chocolates among students to minimize the difference between the largest and smallest number of chocolates.
• Sort the array of chocolates.

• Use sliding window technique to find the minimum difference between the largest and smallest number of chocolates.

• Return the minimum difference as the output.
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Round duration - 60 Minutes
Round difficulty - Easy

Another On-site ( DS & Algo) interview.

Q1. 
Problem Statement: Minimize the Maximum
You are given an array of integers and an integer K. For each array element, you can adjust it by increasing or decreasing it by a value of K. Your goal is to minim...read more
Ans. 
Given an array of integers and an integer K, minimize the difference between the maximum and minimum elements after adjusting each element by +/- K.
• Sort the array in non-decreasing order.

• For each element, calculate the difference between the current element and the next element.

• Adjust the element by adding or subtracting K to minimize the difference.

• Return the minimum possible difference between the maximum and minimum
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Round duration - 60 minutes
Round difficulty - Easy

On-site ( DS & Algo) interview.
Google mainly focuses on logic and how you are coming with a solution. It notes down each and every small mistake. Interviewers are really very helpful. They expect clear code with an optimal approach.

Q1. 
Farthest Distance From Lands Problem Statement
Given a binary square matrix 'ARR' with 'N' rows and 'N' columns, where '0' represents water and '1' represents land.
Determine the water cell whose distanc...read more
Ans. 
Find the water cell farthest from land in a binary matrix using Manhattan distance.
• Iterate through the matrix to find all land cells and water cells

• Calculate the Manhattan distance of each water cell to the nearest land cell

• Return the maximum distance found
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