Nagarro Java Full Stack Developer Interview Questions, Process, and Tips for Freshers

1)Driffience between Abstract class &
Interface.
-abstract class
represents property
&
behaviour of an object
whereas
interface
represents
behaviour
of an object.
2)Driffience between equal() vs ==operator.
equal() is
an object class method
whereas
equal() of string class
override
the object class equal().
3)can we use pointer's in Java.
Not explicitly but implicitly we can use pointer's in java.
Dynamic m/m refers with help of pointer's but java does not support the pointer's.
when we r creating an object in java refrence varaible of an object holds the identity that is nothing but an implicit pointer that holds an unique identity of an object.
4)How we can print object ID.
-Object ID printed with help of object class which is a service provider class having 9().
5)what is object class.
-it is a super class of all predefined & userdefined class.
6)Write a prog to get name of main thread in java.
-class A
{
psvm(String args [])
{
s.o.pln(Thread.currentThread().getName());
}
}
7)length vs length()
-length
is
data menmber
of proxy class
whereas
length() is a string class().

• Q1. Explain JVM in ur own language.
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• Q2. Exlplaing Multhreading.
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Round duration - 180 minutes
Round difficulty - Medium

Have to solve MCQ questions and 3 programming problems

• Q1. Anagram Pairs Pre-requisites: Anagrams are defined as words or names that can be formed by rearranging letters of another word. Such as "spar" can be ...read more
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• Q2. Minimum number of swaps required to sort an array You have been given an array 'ARR' of 'N' distinct elements. Your task is to find the minimum ...read more
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• Q3. Queue Using Stack Implement a queue data structure which follows FIFO(First In First Out) property, using only the instances of the stack data structure. Note: ...read more
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Round duration - 6 weeks
Round difficulty - Hard

• Q1. Assignment One use case was given as Account Statements Transcription to be done as a full stack application to convert the uploading excell sheet document into...read more
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Round duration - 90 minutes
Round difficulty - Hard

Technical questions were asked from core java, SQL, UI stacks, Multi threading, exception handling, java 8, UML, SDLC, collections, JDBC, PL/SQL, OS, Data Structures, sorting and searching algorithms, etc...

• Q1. Puzzle

  100 Prisoners with Red/Black Hats

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Round duration - 60 minutes
Round difficulty - Medium

• Q1. Basic HR Questions

  What are your expectations?

  Why should we hire you?

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Round duration - 90 Minutes
Round difficulty - Medium

It was at 9 am in the morning

• Q1. Add two number as linked lists You have been given two singly Linked Lists, where each of them represents a positive number without any leading zeros. Your task...read more
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• Q2. Cycle Detection In Undirected Graph You have been given an undirected graph with 'N' vertices and 'M' edges. The vertices are labelled from 1 to...read more
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Round duration - 50 Minutes
Round difficulty - Hard

• Q1. Technical Questions What is OOPS . Tell the different OOps features. Implement method overloading in c++ What is Synchronisation. How can we implement synchroni...read more
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• Q2. Maximum Subarray Sum You are given an array/list ARR consisting of N integers. Your task is to find the maximum possible sum of a non-empty subarray(contagious)...read more
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Round duration - 30 Minutes
Round difficulty - Hard

Happened on teams

• Q1. Basic HR Questions

  Explain yourself. How will you manage a team of 10 employees

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Round duration - 100 minutes
Round difficulty - Hard

The test had 3 parts:
1. Aptitude - 20 questions to be done in 25 minutes. (Medium level)
2. Technical MCQs - 25 questions to be done in 35 minutes. (Medium-Hard level) (HTML, JS, CSS, SQL)
3. Coding - 2 out of 3 questions to be done in 40 minutes. 20 minutes were allotted for each question. No switching between the codes was allowed. (1-easy, 2-medium in total)

• Q1. Count Set Bits You are given a positive integer ‘N’. Your task is to find the total number of ‘1’ in the binary representation of all the numbers from 1 to N. S...read more
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• Q2. Smallest number whose digits multiplication is ‘N’ You are given a positive integer ‘N’. The task is to find and return the smallest number, ‘M’, such that the ...read more
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Round duration - 45 minutes
Round difficulty - Medium

It was the first face-to-face technical round. The medium was ModernHire. There was only 1 member in the interview panel. This round tested me on C fundaments, Operating System basics, and problem-solving skills.
Questions asked:
What are the TRUNCATE, DELETE and DROP statements?
What are void elements in HTML?
Define multipart form data?
1. How does the C compiler works?
2. What are deadlocks and why does it happen?
3. How to resolve deadlock?
4. What is a kernel?
5. How to dynamically allocate memory in C?
6. What is makefile?
7. What is multi-threading and why is it useful?
8. What is the need for synchronization in OS?
9. How do you run a program of 10 GB using 2 GB memory?
10. What are semaphores and mutex?
11. How is HashMap implemented?
12. Difference between linker and loader.
13. Importance of header files.
14. What is Dynamic binding?
15. What type of database should you use where transactions are involved?
16. Brief discussion on the Internship experience.

• Q1. Merge Sort Given a sequence of numbers ‘ARR’. Your task is to return a sorted sequence of ‘ARR’ in non-descending order with help of the merge sort algorithm. E...read more
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Round duration - 50 minutes
Round difficulty - Medium

This was a managerial cum technical round. I was asked to introduce myself (both technical details and hobbies). Then I was asked about my internship experiences and what I learnt from them. After that, he asked me questions about the projects mentioned in my resume. He tested my in-depth knowledge of the technologies that I used. He also asked me about the alternative solutions and the drawbacks of my solution.
After that, he asked me to speak about Operating Systems for 5 minutes without giving a pause. Then he asked me to speak about the OSI model and the TCP/IP model for the next 5-10 minutes again without giving a pause. He appreciated my perfomance and gave me a coding question.
What is User-defined function? What are its various types in SQL. What is an Alias in SQL?
Then he asked me whether I had any questions.

• Q1. Find a Node in Linked List You have been given a singly linked list of integers. Write a function that returns the index/position of integer data denoted by ...read more
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Round duration - 15 minutes
Round difficulty - Easy

Typical HR questions were asked in this round.

• Q1. Basic HR Questions

  Introduce yourself.
  Mention something that is not in your resume.
  Why are you fit for this role?
  Why HPE?
  Plans for higher studies.

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• Q1. Core java basic questions
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• Q1. Scenario based question on my last project
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It is mix of both aptitude and coding assignment time duration is 3 hrs

• Q1. This is one to one interview i was asked questions on java and sql basic level questions
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• Q1. Basic hr questions like about the company , tell me about yourself
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• Q1. Basic input outputs questinos and coding rounds.there was an advanced coding round too.
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• Q1. Introduction. questions were asked on java oops.
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• Q2. Also sql normalization, c vs c++ vs java.
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• Q3. Projects related quuestions
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• Q1. Why should we hire you?
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• Q2. Where do you see yourself in 5 years?
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• Q3. What are your strengths and weaknesses?
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• Q4. Tell me about yourself.
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• Q5. Latest technology interest. hobbies.relocation related questions
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