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Stellar Informatics Software Developer Interview Questions and Answers for Experienced

Updated 29 Apr 2022

6 Interview questions

A Software Developer was asked
Q. How do you connect to a database programmatically?
Ans. 

Database program can be connected using various methods such as JDBC, ODBC, ORM, etc.

  • JDBC is a Java API for connecting to databases

  • ODBC is a standard API for connecting to databases

  • ORM frameworks like Hibernate can be used to connect to databases

  • Connection string is used to specify the database connection details

A Software Developer was asked
Q. Write a program that takes a name as input and prints 'Hello, [user name]'.
Ans. 

A program to take user name and print 'Hello, username'

  • Create a variable to store the user input

  • Use printf or cout to print the greeting with the user input

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A Software Developer was asked
Q. What is the difference between a Set and a Vector?
Ans. 

Set is an unordered collection of unique elements while vector is an ordered collection of elements.

  • Set does not allow duplicates while vector can have duplicates.

  • Set is implemented using hash table while vector is implemented using dynamic array.

  • Set has faster lookup time while vector has faster iteration time.

  • Set is useful when uniqueness is important while vector is useful when order is important.

A Software Developer was asked
Q. What is the difference between Collection and Collections in Java?
Ans. 

collection is an interface in Java that represents a group of objects while collections is a class that provides utility methods for collections.

  • Collection is an interface while Collections is a class

  • Collection is a part of Java Collections Framework while Collections is a utility class

  • Collection is used to represent a group of objects while Collections is used to provide utility methods for collections

  • Example of ...

A Software Developer was asked
Q. What is the difference between a hash table and a hash map?
Ans. 

Hash table and hash map are two names for the same data structure that stores key-value pairs.

  • Both use a hash function to map keys to indices in an array

  • Hash table is an older term, while hash map is more commonly used in modern programming languages

  • Java uses the term HashMap, while Python uses the term dict

  • Hash maps/tables have O(1) average case time complexity for insertion, deletion, and retrieval

A Software Developer was asked
Q. What is collection and collections?
Ans. 

A collection is a group of objects of the same type while collections are classes that implement data structures.

  • Collections are used to store, retrieve, manipulate, and communicate aggregate data.

  • Java.util package provides various classes for implementing collections like ArrayList, LinkedList, HashSet, etc.

  • Collections can be generic or non-generic, ordered or unordered, and allow duplicates or not.

  • Collections ca...

Stellar Informatics Software Developer Interview Experiences for Experienced

2 interviews found

I applied via Naukri.com and was interviewed before Apr 2021. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Aptitude Test 

40 questions of tick mark

Round 3 - Technical 

(1 Question)

  • Q1. Very strong to core Java and basic of opps

Interview Preparation Tips

Topics to prepare for Stellar Informatics Software Developer interview:
  • Core Java
Interview preparation tips for other job seekers - Company atleast 3 months without any pay for you.

I appeared for an interview before Dec 2019.

Interview Questionnaire 

6 Questions

  • Q1. Difference between hash table hash map?
  • Ans. 

    Hash table and hash map are two names for the same data structure that stores key-value pairs.

    • Both use a hash function to map keys to indices in an array

    • Hash table is an older term, while hash map is more commonly used in modern programming languages

    • Java uses the term HashMap, while Python uses the term dict

    • Hash maps/tables have O(1) average case time complexity for insertion, deletion, and retrieval

  • Answered by AI
  • Q2. What is collection and collections?
  • Ans. 

    A collection is a group of objects of the same type while collections are classes that implement data structures.

    • Collections are used to store, retrieve, manipulate, and communicate aggregate data.

    • Java.util package provides various classes for implementing collections like ArrayList, LinkedList, HashSet, etc.

    • Collections can be generic or non-generic, ordered or unordered, and allow duplicates or not.

    • Collections can be ...

  • Answered by AI
  • Q3. Difference between collection and collections?
  • Ans. 

    collection is an interface in Java that represents a group of objects while collections is a class that provides utility methods for collections.

    • Collection is an interface while Collections is a class

    • Collection is a part of Java Collections Framework while Collections is a utility class

    • Collection is used to represent a group of objects while Collections is used to provide utility methods for collections

    • Example of Colle...

  • Answered by AI
  • Q4. Difference between Set And vector?
  • Ans. 

    Set is an unordered collection of unique elements while vector is an ordered collection of elements.

    • Set does not allow duplicates while vector can have duplicates.

    • Set is implemented using hash table while vector is implemented using dynamic array.

    • Set has faster lookup time while vector has faster iteration time.

    • Set is useful when uniqueness is important while vector is useful when order is important.

  • Answered by AI
  • Q5. Write A program take the name and print the hello user name ?
  • Ans. 

    A program to take user name and print 'Hello, username'

    • Create a variable to store the user input

    • Use printf or cout to print the greeting with the user input

  • Answered by AI
  • Q6. Connection of database program ?
  • Ans. 

    Database program can be connected using various methods such as JDBC, ODBC, ORM, etc.

    • JDBC is a Java API for connecting to databases

    • ODBC is a standard API for connecting to databases

    • ORM frameworks like Hibernate can be used to connect to databases

    • Connection string is used to specify the database connection details

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - First round clear apptitude round then after clear face to face round.

Skills evaluated in this interview

Top trending discussions

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Interview Tips & Stories
6d (edited)
a team lead
Why are women still asked such personal questions in interview?
I recently went for an interview… and honestly, m still trying to process what just happened. Instead of being asked about my skills, experience, or how I could add value to the company… the questions took a totally unexpected turn. The interviewer started asking things like When are you getting married? Are you engaged? And m sure, if I had said I was married, the next question would’ve been How long have you been married? What does my personal life have to do with the job m applying for? This is where I felt the gender discrimination hit hard. These types of questions are so casually thrown at women during interviews but are they ever asked to men? No one asks male candidates if they’re planning a wedding or how old their kids are. So why is it okay to ask women? Can we please stop normalising this kind of behaviour in interviews? Our careers shouldn’t be judged by our relationship status. Period.
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Interview questions from similar companies

I applied via Campus Placement and was interviewed before Aug 2020. There were 4 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. It was mostly puzzles.
  • Q2. One algo question invoving recursive function .
  • Ans. 

    Recursive functions solve problems by breaking them down into smaller subproblems, often leading to elegant solutions.

    • A recursive function calls itself with modified parameters.

    • Base case is crucial to prevent infinite recursion.

    • Example: Factorial function - factorial(n) = n * factorial(n-1) with base case factorial(0) = 1.

    • Example: Fibonacci sequence - fib(n) = fib(n-1) + fib(n-2) with base cases fib(0) = 0, fib(1) = 1.

    • ...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - For freshers - prepare puzzles and basic computer science fundamentals

Interview Questionnaire 

1 Question

  • Q1. Conceps

Interview Questionnaire 

1 Question

  • Q1. Concepts

Interview Questionnaire 

1 Question

  • Q1. Concepts

Interview Questionnaire 

4 Questions

  • Q1. Basics of spring
  • Q2. Basics of angular
  • Q3. About the project
  • Q4. Scenario based questions

Interview Preparation Tips

Interview preparation tips for other job seekers - be prepared with baiscs and be strong in fundamentals
Are these interview questions helpful?
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed before Feb 2023. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. DSA Questions on array/linkedlist
  • Q2. Spring Boot, Java OOPs,

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare DSA as each round they will focus on
with mix of other technicals like FE/BE developments
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

Senior Engineer from the team which is hiring you and an HR will join and you are given array, string and hashmap leetcode easy question and then some dbms queries to write. Once you solve that, engineer will ask tech related questions from your resume to see your understanding about those tech.

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare your resume. You should know everything about your resume
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed in Apr 2023. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.
View all tips
Round 2 - Aptitude Test 

45 min of mcq question on java and reasoning and aptitude.

Round 3 - One-on-one 

(1 Question)

  • Q1. All question from java spring boot, microservices and rest api along with some basic design of database.

Stellar Informatics Interview FAQs

How many rounds are there in Stellar Informatics Software Developer interview for experienced candidates?
Stellar Informatics interview process for experienced candidates usually has 3 rounds. The most common rounds in the Stellar Informatics interview process for experienced candidates are Resume Shortlist, Aptitude Test and Technical.
What are the top questions asked in Stellar Informatics Software Developer interview for experienced candidates?

Some of the top questions asked at the Stellar Informatics Software Developer interview for experienced candidates -

  1. Write A program take the name and print the hello user nam...read more
  2. What is collection and collectio...read more
  3. Difference between collection and collectio...read more

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Stellar Informatics Software Developer Salary
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