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CognitivZen Technologies Senior Java Developer Interview Questions and Answers

Updated 20 Aug 2024

CognitivZen Technologies Senior Java Developer Interview Experiences

1 interview found

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

I applied via Naukri.com and was interviewed in Jul 2024. There was 1 interview round.

Round 1 - Technical 

(5 Questions)

  • Q1. Few coding questions
  • Q2. Previous project detailed explanation
  • Q3. Oops conceptsexplanation
  • Q4. What is Polymorphism
  • Ans. 

    Polymorphism is the ability of a single function or method to operate on different types of data.

    • Polymorphism allows objects of different classes to be treated as objects of a common superclass.

    • There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

    • Example: Animal superclass with subclasses Dog and Cat. Both Dog and Cat can be treated as Animals.

  • Answered by AI
  • Q5. Differences between heap and stack memory
  • Ans. 

    Heap memory is used for dynamic memory allocation, while stack memory is used for static memory allocation.

    • Heap memory is used for storing objects and is managed by the JVM, while stack memory is used for storing method calls and local variables.

    • Heap memory is larger in size compared to stack memory.

    • Objects stored in heap memory can be accessed globally, while variables in stack memory are only accessible within the sc...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare well with all old and new concepts
panel here are well exposed to technology and have years of experience in relevant fiels.

Interview questions from similar companies

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Recruitment Consulltant and was interviewed in May 2024. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Lookup vs graphlookup in mongodb
  • Ans. 

    Lookup is used to perform a left outer join in MongoDB, while graphlookup is used to perform recursive graph traversal.

    • Lookup is used to perform a left outer join between two collections in MongoDB.

    • Graphlookup is used to perform recursive graph traversal in a collection that contains graph data.

    • Lookup can only perform a single level join, while graphlookup can perform multiple levels of traversal.

    • Lookup is faster than

  • Answered by AI
  • Q2. Count frequency of each character in string
  • Ans. 

    Use a hashmap to count the frequency of each character in a string.

    • Create a hashmap to store characters as keys and their frequencies as values.

    • Iterate through the string and update the hashmap accordingly.

    • Return the hashmap with character frequencies.

  • Answered by AI
Round 2 - Technical 

(2 Questions)

  • Q1. Create a rest api all the way from controller to repository using NOTEPAD
  • Ans. 

    Creating a REST API from controller to repository using NOTEPAD

    • Create a controller class with mapping annotations for REST endpoints

    • Implement service layer to handle business logic and interact with repository

    • Define repository interface with methods for data access operations

    • Use Spring Boot for easy setup and configuration

    • Test API endpoints using tools like Postman

  • Answered by AI
  • Q2. Couldnt write custom mongodb query at repository layer in notepad which rejected my candidature.

Skills evaluated in this interview

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 Apr 2023. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Java fundamentals
  • Q2. Spring fundamentals
Round 2 - Technical 

(2 Questions)

  • Q1. Managerial round
  • Q2. Scenario based questions
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Walk-in and was interviewed in Oct 2024. There were 2 interview rounds.

Round 1 - Aptitude Test 

Simple question...….. ।।

Round 2 - Technical 

(2 Questions)

  • Q1. Java questions Opps, coding ques
  • Q2. Opps Coding । । ।
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-

I applied via Walk-in

Round 1 - Technical 

(2 Questions)

  • Q1. How make a queue using a stack
  • Ans. 

    To implement a queue using a stack, use two stacks and simulate the queue operations.

    • Use two stacks, one for enqueue operation and one for dequeue operation.

    • For enqueue operation, simply push elements onto the stack used for enqueueing.

    • For dequeue operation, if the dequeue stack is empty, pop all elements from enqueue stack and push onto dequeue stack.

    • Then pop from the dequeue stack to simulate dequeue operation.

  • Answered by AI
  • Q2. Create a linked list
  • Ans. 

    A linked list is a data structure consisting of nodes where each node points to the next node in the sequence.

    • Create a Node class with data and next pointer

    • Initialize a head pointer to null

    • Add nodes by updating next pointers

    • Traverse the list by following next pointers

  • Answered by AI

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Jun 2024. There were 2 interview rounds.

Round 1 - Coding Test 

It was ok. I was not able to solve all the questions.

Round 2 - Technical 

(2 Questions)

  • Q1. Remove the last element from a linkedlist
  • Ans. 

    To remove the last element from a linked list, iterate to the second last node and update its next pointer to null.

    • Iterate through the linked list to find the second last node

    • Update the next pointer of the second last node to null

  • Answered by AI
  • Q2. Some basic questions on oops dbms and os

Skills evaluated in this interview

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

I applied via Naukri.com and was interviewed in Mar 2024. There were 2 interview rounds.

Round 1 - Aptitude Test 

Simple question on maths

Round 2 - Technical 

(2 Questions)

  • Q1. Explain OOPS concept
  • Ans. 

    OOPS (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.

    • OOPS focuses on creating objects that interact with each other to solve complex problems

    • Key principles include encapsulation, inheritance, polymorphism, and abstraction

    • Encapsulation ensures that the internal state of an object is hidden from the outside world

    • Inheritance allows a class to inherit...

  • Answered by AI
  • Q2. Coding array questions
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-

I applied via Job Portal

Round 1 - Coding Test 

60mintues DSA level coding exam

I applied via Walk-in and was interviewed in Feb 2022. There were 3 interview rounds.

Round 1 - Aptitude Test 

5 coding questions in 45 mins ...very easy questions, you can easily do..pen paper based exam. Programs were on strings, arrays and patterns

Round 2 - Coding Test 

Round 2 is also coding test here questions were moderate. 3 questions given for 1.5 hours..
Again string and pattern programs were given.
Candidate should be clear with loops , strings arrays..thats it.. no need of studying linked lists ,stacks, queues or other data structures..your knowledge of algorithms doesnt matter here..its all about patterns, strings, arrays and loops

Round 3 - Coding Test 

It is last coding round..here there is too much politics those who are working there call there friends and make them sit directly in final round..3 questions given no limit on time you have to do any 2 . They will roam around in roam and will discuss your code..they will help there friends as i was there without any referral there was noone for me..but it doesn't matter if u have strong basics u can crack it ..because problems are again on strings, arrays,patterns . I got bored doing same problems.

Interview Preparation Tips

Topics to prepare for Cyntexa Software Developer interview:
  • Strings
  • Arrays
  • Pattern Making
  • Loops
Interview preparation tips for other job seekers - Watch some YouTube video on patterns, strings and array programs..make your logic correct in these 3 areas ..you can easily crack.
Company is small but Salesforce is on demand in 2022 and I have heard cyntexa pays less but learning experience is far better than meta or other companies in similar domain.
If u have a friend there ask them for there referral. After gaining one year experience you can easily switch, my friends got packages upto 10 lpa in just one year.
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Company Website and was interviewed before Mar 2023. There were 3 interview rounds.

Round 1 - Aptitude Test 

Normal aptitude questions

Round 2 - Coding Test 

Python basic and some basic coding questions

Round 3 - Coding Test 

Advance level coding question

CognitivZen Technologies Interview FAQs

How many rounds are there in CognitivZen Technologies Senior Java Developer interview?
CognitivZen Technologies interview process usually has 1 rounds. The most common rounds in the CognitivZen Technologies interview process are Technical.
How to prepare for CognitivZen Technologies Senior 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 CognitivZen Technologies. The most common topics and skills that interviewers at CognitivZen Technologies expect are Spring Boot, Java, Kafka, Algorithms and Data Structures.
What are the top questions asked in CognitivZen Technologies Senior Java Developer interview?

Some of the top questions asked at the CognitivZen Technologies Senior Java Developer interview -

  1. Differences between heap and stack mem...read more
  2. What is Polymorph...read more
  3. Oops conceptsexplanat...read more

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