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Infrrd Java Back End Developer Interview Questions, Process, and Tips
Infrrd Java Back End Developer Interview Experiences
1 interview found
I appeared for an interview in Aug 2024.
(5 Questions)
- Q1. Design a layered architecture for saving the user data to db. What all annotations to be used on each class and on functions if any?
- Ans.
Design a layered architecture for saving user data to db with appropriate annotations.
Create a data access layer (DAO) to interact with the database using annotations like @Repository
Implement a service layer to handle business logic with annotations like @Service
Use @Entity annotation on model classes to map them to database tables
Add @Id annotation on primary key fields in model classes
Utilize @Transactional annotati
- Q2. Follow up question on question 1 to make different service , controller for admin and user and autowire services in user controller.
- Q3. How to handle exception at controller level? Use of restcontrolleradvice
- Ans.
Using RestControllerAdvice to handle exceptions at controller level in Java
Create a class annotated with @RestControllerAdvice to handle exceptions globally
Use @ExceptionHandler annotation in the class to define methods to handle specific exceptions
Return ResponseEntity with appropriate status code and error message in the exception handling methods
- Q4. Sql query to find nth highest salary. What does limit and offset do?
- Ans.
SQL query to find nth highest salary using LIMIT and OFFSET.
Use ORDER BY salary DESC to sort salaries in descending order.
Use LIMIT 1 OFFSET n-1 to get the nth highest salary.
For example, SELECT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 2 will give the 3rd highest salary.
- Q5. Which data structure to use to store data in the order of insertion and also have uniqueness?
- Ans.
LinkedHashSet is the data structure to use for storing data in order of insertion and uniqueness.
LinkedHashSet maintains insertion order and ensures uniqueness of elements.
It uses a combination of LinkedList and HashSet to achieve this.
Example: LinkedHashSet<String> set = new LinkedHashSet<>();
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Skills evaluated in this interview
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Software Engineer Interview Questions & Answers
Josh Technology Group
Anonymous
posted on 28 Jul 2021
I applied via Campus Placement and was interviewed before Jul 2020. There was 1 interview round.
Interview Questionnaire
2 Questions
- Q1. Check if binary tree is balanced or not.
- Ans.
Check if binary tree is balanced or not.
A balanced binary tree has the height of left and right subtrees differ by at most 1.
Recursively check the height of left and right subtrees and compare.
Use a helper function to calculate the height of a subtree.
Time complexity: O(nlogn) for a balanced tree, O(n^2) for a skewed tree.
- Q2. Detect loops in linked list.
- Ans.
Detect loops in a linked list.
Use two pointers, one moving at a faster pace than the other.
If there is a loop, the faster pointer will eventually catch up to the slower one.
To detect the start of the loop, reset one pointer to the head and move both pointers at the same pace.
Interview Preparation Tips
Skills evaluated in this interview
Software Engineer Interview Questions & Answers
Josh Technology Group
Anonymous
posted on 16 Sep 2021
I appeared for an interview before Sep 2020.
(1 Question)
Round duration - 60 mins
Round difficulty - Medium
- Q1.
Railway Seat Berth Determination
Given a railway seat number represented as an integer, determine if it is a valid seat number and identify its berth type. Possible berth types include lower berth, middle...
- Ans.
Given a railway seat number, determine if it is valid and identify its berth type.
Parse input integer 't' for number of test cases
For each test case, check if seat number is valid (1 <= N <= 100)
Identify berth type based on seat number and output the result
Possible berth types are Lower, Middle, Upper, Side Lower, and Side Upper
(1 Question)
Round duration - 90 mins
Round difficulty - Hard
First they asked me to introduce myself then they started questioning on oops concept from basic to advance level such as inheritance, polymorphism, abstraction, exception handling , STL etc. Next they started questioning on data structures. They asked me the logic of “how to find the middle of a linked list”.
- Q1.
Matrix Symmetry Check
You are provided with a square matrix. Your task is to return
trueif the matrix is symmetric; otherwise, returnfalse.A symmetric matrix is characterized by its transpose being eq...
- Ans.
Check if a square matrix is symmetric by comparing it with its transpose.
Iterate through the matrix and compare each element with its corresponding element in the transpose
If any pair of elements do not match, return false immediately
If all pairs match, return true at the end
Interview Preparation Tips
Tip 1 : Clear the basic concepts of data structure and OOPs.
Tip 2 : Use coding ninja platform and Hackerearth for practice on coding skills.
Tip 3 : Use Geeks For Geeks for interview preparation.
Tip 1: Make your resume short and try to make it of one page only.
Tip 2: Add relevant keywords
Skills evaluated in this interview
They totally select you on the basis of aptitude only
(1 Question)
- Q1. It is also based on aptitude
Interview Preparation Tips
Software Engineer Interview Questions & Answers
Indus Valley Partners
Anonymous
posted on 11 Jan 2025
Coding Rount
DSA Round + Puzzle
SQL + Project Discussion
JS
It represents the eligibility of person and thinking process ,view of thoughts
(1 Question)
- Q1. We cannot judge people to atonce chance
Skills ,fast typing , experienced ,new ideas
(1 Question)
- Q1. All the knowledge of technical work and word
Deeply study case and make a point to make attractive
Interview Preparation Tips
I applied via Referral and was interviewed before Aug 2021. There were 2 interview rounds.
General topics like mathe, English, social etc
Interview Preparation Tips
- Python
- general
Software Engineer Interview Questions & Answers
Saama Technologies
Prashant Kumar
posted on 15 Jul 2022
I applied via Referral and was interviewed before Jul 2021. There were 3 interview rounds.
If you are a fresher , then this is for you else almost no coding test for experienced candidates.
(1 Question)
- Q1. Javascript basics, Angular react general questions depends upon profile.
(1 Question)
- Q1. They asked general questions related to some hectic situation faced in previous company / project..
Interview Preparation Tips
Selected
I applied via Naukri.com and was interviewed before Sep 2023. There were 2 interview rounds.
(2 Questions)
- Q1. Self introduction
- Q2. Project description
- Ans.
Developed a web application for tracking personal fitness goals and progress.
Used React.js for front-end development
Implemented RESTful APIs for data retrieval and storage
Utilized MongoDB for database management
(2 Questions)
- Q1. Questions on project
- Q2. Any problems faced
- Ans.
Yes, faced challenges with debugging complex code and integrating third-party APIs.
Debugging complex code with multiple dependencies
Integrating third-party APIs with inconsistent documentation
Resolving compatibility issues between different software components
Interview Preparation Tips
Software Engineer Interview Questions & Answers
Saama Technologies
Prashant Kumar
posted on 15 Jul 2022
(1 Question)
- Q1. They asked general questions related to some hectic situation faced in previous company / project..
Interview Preparation Tips
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