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Happiest Minds Technologies
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Happiest Minds Technologies Java Developer Interview Questions and Answers
Happiest Minds Technologies Java Developer Interview Experiences
3 interviews found
S Chakra
Selected
I applied via Naukri.com and was interviewed in Mar 2023. There were 2 interview rounds.
(2 Questions)
- Q1. 1. Write a program to sort the characters of a string in descending order? 2. Write a lambda expression of addition? 3. How to write custom exceptions? 4. What is indexing?
- Ans.
This program sorts the characters of a string in descending order.
Convert the string to a character array
Sort the character array in descending order
Convert the sorted character array back to a string
- Q2. 5. What are scope of beans? 6. Functional interfaces and examples 7. Can we make a class as private? 8. SQL query to find employees of particular department table. 9. Cascading 10. MapBy in hibernate 11. ...
- Ans.
Java Developer interview questions on beans, functional interfaces, SQL queries, hibernate, and more.
Scope of beans refers to the visibility of a bean within an application context.
Functional interfaces have only one abstract method and can be used as lambda expressions.
Classes cannot be private, but their constructors can be.
SQL query to find employees of a particular department table: SELECT * FROM employees WHERE de...
Interview Preparation Tips
- Core Java
- Hibernate
- Spring Boot
- Java 8
Selected
I applied via Naukri.com and was interviewed in Mar 2024. There were 3 interview rounds.
(1 Question)
- Q1. Based on the resume
(1 Question)
- Q1. Scenario based questions
(1 Question)
- Q1. Package discussion
Selected
I applied via Approached by Company and was interviewed before Oct 2022. There were 4 interview rounds.
Recursion of prime number
(1 Question)
- Q1. Question related to project and on spring boot
(1 Question)
- Q1. Salary discussion
Java Developer Jobs at Happiest Minds Technologies
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Interview questions from similar companies
I applied via Referral and was interviewed in Oct 2024. There was 1 interview round.
(3 Questions)
- Q1. Given an array of non-negative integers.Find the length of the longest subsequence such that elements in the subsequence are contiguous integers. The consecutive numbers can be in any order. Example n=7 nu...
- Ans.
Find the length of the longest subsequence of contiguous integers in an array.
Sort the array
Iterate through the array and check for consecutive integers
Keep track of the longest subsequence found
- Q2. Get list of pincodes from these objects Employee{ id Long, name String, Addresses : List } Addresses{ houseNo long, pindcode long, state String, country String, } Ans. Use flatMap to flatten and then use m...
- Ans.
Use flatMap and map to extract list of pincodes from Employee objects
Use flatMap to flatten the list of Addresses in each Employee object
Use map to iterate over the flattened list and extract the pincodes
Example: employeeList.stream().flatMap(emp -> emp.getAddresses().stream()).map(address -> address.getPincode()).collect(Collectors.toList())
- Q3. What is Database Pooling, Hikari and its configurations. Java 8 to current enchancements and current java version Factory and Builder design patterns to explain and code Project expalantion and details, Cr...
- Ans.
Database pooling is a technique used to manage a pool of database connections for efficient resource utilization. HikariCP is a popular database connection pooling library in Java.
HikariCP is a high-performance database connection pooling library for Java applications.
It is known for its low latency and high throughput.
Configurations for HikariCP include settings such as maximum pool size, connection timeout, and idle ...
Interview Preparation Tips
Skills evaluated in this interview
I applied via Recruitment Consulltant and was interviewed in Dec 2024. There was 1 interview round.
(3 Questions)
- Q1. Explain Spring Boot
- Q2. What is Redux in React
- Q3. What is Context API in React
syed gajini ahmed
I applied via LinkedIn and was interviewed in Oct 2024. There was 1 interview round.
(3 Questions)
- Q1. Spring Security Implementation
- Q2. Api design Implementation
- Ans.
API design implementation involves creating a well-structured and user-friendly interface for interacting with software applications.
Understand the requirements and use cases for the API
Design clear and consistent endpoints with proper documentation
Implement secure authentication and authorization mechanisms
Follow RESTful principles for creating APIs
Consider scalability and performance optimizations
- Q3. Stream API coding question
Seban Thomas
(2 Questions)
- Q1. Explain Sonarqube, different type of code smells, and how its implemented in CI CD
- Ans.
Sonarqube is a static code analysis tool used to detect code smells and bugs in code. It is integrated into CI/CD pipelines for continuous code quality checks.
Sonarqube is a static code analysis tool that identifies code smells, bugs, and security vulnerabilities in code.
Code smells are common programming issues that may indicate a deeper problem in the code. Examples include duplicated code, long methods, and complex ...
- Q2. Write a program to find the numbers divisble by 3 in a string - and reverse its indexes eg : - input : String s = "123456789" output String s = "129456783"
- Ans.
Program to find numbers divisible by 3 in a string and reverse their indexes.
Iterate through the string and check if each character is a number divisible by 3.
Store the divisible numbers in an array and reverse their indexes.
Join the array back into a string and return the result.
(2 Questions)
- Q1. Springboot related
- Q2. MySql questions
(2 Questions)
- Q1. Coding questions on java 8
- Q2. Previous Project
(2 Questions)
- Q1. Java8 coding to filter the vowels
- Ans.
Using Java8 to filter vowels from an array of strings
Use Java8 stream and filter to iterate through each string in the array
Use a lambda expression to check if each character is a vowel
Collect the filtered strings into a new array
- Q2. Java8, Multi Threading, Hibernate, JPA
Skills evaluated in this interview
I applied via Company Website and was interviewed in Mar 2024. There were 5 interview rounds.
30 multiple choice questions
Two coding questions
(1 Question)
- Q1. Oops questions like main principles of oops
(1 Question)
- Q1. Deep in project
(1 Question)
- Q1. Self intro, family background,some hr questions
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Senior Software Engineer
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salaries
|  ₹4.8 L/yr - ₹18 L/yr |
|
Module Lead
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| ₹9 L/yr - ₹30 L/yr |
|
Technical Lead
817
salaries
| ₹8.9 L/yr - ₹38.7 L/yr |
|
Software Engineer
618
salaries
| ₹2.8 L/yr - ₹9.2 L/yr |
|
Senior Engineer
346
salaries
| ₹3.9 L/yr - ₹13.5 L/yr |
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