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Quinnox Java Developer Interview Questions and Answers

Updated 25 Jul 2024

Quinnox Java Developer Interview Experiences

1 interview found

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed before Jul 2023. There were 5 interview rounds.

Round 1 - Aptitude Test 

Some technical and aptitude MCQ questions

Round 2 - Coding Test 

3 coding questions asked

Round 3 - Technical 

(2 Questions)

  • Q1. Questions asked on java and SQL
  • Q2. Some questions based on resume
Round 4 - Behavioral 

(1 Question)

  • Q1. Technical and behaviour questions
Round 5 - HR 

(2 Questions)

  • Q1. Tell me about your self
  • Ans. 

    I am a passionate Java Developer with 5 years of experience in developing web applications and implementing software solutions.

    • 5 years of experience in Java development

    • Strong knowledge of web application development

    • Experience in implementing software solutions

    • Passionate about coding and problem-solving

  • Answered by AI
  • Q2. Project and behaviour questions

Interview Preparation Tips

Interview preparation tips for other job seekers - Now onwards only 3 round for freshers aptitude plus coding then technical then hr

Interview questions from similar companies

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Referral and was interviewed in Oct 2024. There was 1 interview round.

Round 1 - Technical 

(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

  • Answered by AI
  • 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())

  • Answered by AI
  • 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 ...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare DSA and design patterns and knowledge of springboot,java & streams API advance methods etc.

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Recruitment Consulltant and was interviewed in Dec 2024. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. Explain Spring Boot
  • Q2. What is Redux in React
  • Q3. What is Context API in React
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(10 Questions)

  • Q1. Tell me about yourself and the project you have done
  • Q2. Have you work on the spring boot freamwork
  • Q3. Collection framework
  • Q4. Write a program to make a Linkedlist, you have to develop the logic for the linkedlist suppose your are the first who is going to invent the linkedlist what would be the apporach how you create the add/del...
  • Q5. Have you worked on the Data Structures
  • Ans. 

    Yes, I have worked on various data structures like arrays, linked lists, stacks, queues, trees, and graphs.

    • I have implemented algorithms using data structures like sorting, searching, and traversal.

    • I have optimized code by choosing the appropriate data structure for the problem.

    • I have used data structures in projects to efficiently store and manipulate data.

  • Answered by AI
  • Q6. Have you worked on the Multithreading
  • Ans. 

    Yes, I have experience working on Multithreading in Java.

    • Implemented multithreading using Java's Thread class

    • Used synchronized keyword to handle thread synchronization

    • Utilized Executor framework for managing thread pools

  • Answered by AI
  • Q7. Write a program to find the min and max no from the array
  • Ans. 

    Program to find min and max no from array of strings

    • Iterate through the array and compare each element to find min and max

    • Use Integer.parseInt() to convert strings to integers for comparison

    • Initialize min and max variables with first element of array

  • Answered by AI
  • Q8. Difference between the @controller vs @restcontroller
  • Ans. 

    The @Controller annotation is used to create a controller class in Spring MVC, while @RestController is used to create RESTful web services.

    • The @Controller annotation is used to create a controller class in Spring MVC, which is used to handle traditional web requests.

    • The @RestController annotation is used to create RESTful web services, which return data in JSON or XML format.

    • The @RestController annotation is a special...

  • Answered by AI
  • Q9. Difference between the @service vs @Repository
  • Ans. 

    The @Service annotation is used to mark a class as a service, while the @Repository annotation is used to mark a class as a repository.

    • The @Service annotation is typically used on service layer classes, which contain business logic.

    • The @Repository annotation is typically used on repository classes, which interact with a database or other data source.

    • Both annotations are used for component scanning and dependency inject...

  • Answered by AI
  • Q10. Difference between the Arrylist vs Linkedlist
  • Ans. 

    ArrayList is implemented using a dynamic array while LinkedList is implemented using a doubly linked list.

    • ArrayList provides fast access to elements using index, but slow insertion and deletion.

    • LinkedList provides fast insertion and deletion, but slow access to elements.

    • Example: ArrayList is suitable for scenarios where random access is required, while LinkedList is suitable for scenarios where frequent insertion and d

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Go through above all question the interview was taken by pran sukh for the pune location

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
Not Selected
Round 1 - Aptitude Test 

20 aptitude,20 comunication,4 program questions

Round 2 - Group Discussion 

General topics . topics about online class vs office line class

Round 3 - HR 

(1 Question)

  • Q1. In this round also they mainly check communication.after that basic questions about the what you put on your resume
Round 4 - HR 

(1 Question)

  • Q1. General round. In this round they told about the company and bond
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(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 ...

  • Answered by AI
  • 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.

  • Answered by AI

Java Developer Interview Questions & Answers

Incedo user image Nithin Krishna

posted on 31 Aug 2024

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Difference between ArrayList and LinkedList?
  • Ans. 

    ArrayList is implemented as a resizable array, while LinkedList is implemented as a doubly linked list.

    • ArrayList provides fast random access, LinkedList provides fast insertion and deletion.

    • ArrayList uses more memory as it needs to allocate a fixed size array, LinkedList uses more memory for storing references to the next and previous elements.

    • Example: ArrayList is better for scenarios where random access is required, ...

  • Answered by AI
  • Q2. Difference between HashMap and HashTable?
  • Ans. 

    HashMap is non-synchronized and allows null values, while HashTable is synchronized and does not allow null values.

    • HashMap is non-synchronized, meaning it is not thread-safe, while HashTable is synchronized and thread-safe.

    • HashMap allows null values for both keys and values, while HashTable does not allow null keys or values.

    • HashMap is faster than HashTable as it is non-synchronized, but HashTable is preferred in multi...

  • Answered by AI

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-

I was interviewed in Jul 2024.

Round 1 - Technical 

(2 Questions)

  • Q1. Micro service disadvantage
  • Ans. 

    Microservices can introduce complexity, communication overhead, and potential performance issues.

    • Increased complexity due to managing multiple services

    • Communication overhead between services

    • Potential performance issues due to network latency

    • Difficulty in maintaining consistency across services

  • Answered by AI
  • Q2. @functionalinterface can we extend or not, map & flatmap
  • Ans. 

    No, @FunctionalInterface cannot be extended. Map and flatMap are default methods in the interface and cannot be overridden.

    • No, @FunctionalInterface cannot be extended as it is a single abstract method interface.

    • Map and flatMap are default methods in the interface and cannot be overridden.

    • Example: public interface MyInterface { void myMethod(); default void myDefaultMethod() { // implementation } }

  • Answered by AI

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Handler methods
  • Q2. Default methods in java8
  • Ans. 

    Default methods in Java 8 allow interfaces to have method implementations.

    • Introduced in Java 8 to provide backward compatibility for interfaces

    • Can have method implementations in interfaces using the 'default' keyword

    • Used to add new methods to interfaces without breaking existing implementations

  • Answered by AI

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(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

  • Answered by AI
  • Q2. Java8, Multi Threading, Hibernate, JPA

Skills evaluated in this interview

Quinnox Interview FAQs

How many rounds are there in Quinnox Java Developer interview?
Quinnox interview process usually has 5 rounds. The most common rounds in the Quinnox interview process are Aptitude Test, Coding Test and Technical.
How to prepare for Quinnox Java Developer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Quinnox. The most common topics and skills that interviewers at Quinnox expect are Spring Boot, Core Java, Java, Hibernate and J2Ee.
What are the top questions asked in Quinnox Java Developer interview?

Some of the top questions asked at the Quinnox Java Developer interview -

  1. Questions asked on java and ...read more
  2. Technical and behaviour questi...read more
  3. Project and behaviour questi...read more

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