80+ Cognizant Java Developer Interview Questions & Answers | Complete Prep Guide 2025

Cognizant Java Developer Interview Experiences

24 interviews found

Java Developer Interview Questions & Answers

Anonymous

posted on 20 Dec 2020

Interview Questionnaire

1 Question

Q1. What array list and linkedlist difference,how hashmap internally working,what is synchronised and it's type,what is difference between abstract and interface,class loading mechanism in Java, you hat is single ton class means and how to create, what is ioc in spring,what is dependency injection and it's type, what is autowired and it's type,what dispatcher servlet and its work, what is spring boot advantages, what is actuator,how database configuration in spring boot,what is type of joins and its work,java 8 features

Ans.

Java Developer interview questions covering array list, linkedlist, hashmap, synchronization, abstract vs interface, singleton class, Spring framework, database configuration, and Java 8 features.

ArrayList and LinkedList differ in terms of implementation, performance, and usage
HashMap uses hashing to store and retrieve key-value pairs
Synchronized is used to ensure thread safety and prevent race conditions
Abstract class...

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Interview Preparation Tips

Interview preparation tips for other job seekers - If you are going for java developer then collection is must you need to know,multithreading, oops concepts, strong hands on spring modules like security,aop, transaction with orm framework knowledge with rest api, and database knowledge means writing queries, I f you have all above things then no body will stop you to select in a interview. Best of luck

Skills evaluated in this interview

Java Developer Interview Questions & Answers

Anonymous

posted on 20 Dec 2024

Interview experience

Good

Difficulty level

Easy

Process Duration

Less than 2 weeks

Result

Not Selected

I was interviewed in Nov 2024.

Round 1 - One-on-one

(2 Questions)

Q1. Prime number program

Ans.

A program to check if a given number is prime or not.

Create a function to check if a number is prime by iterating from 2 to the square root of the number.
If the number is divisible by any number other than 1 and itself, it is not prime.
Handle edge cases like 0, 1, and negative numbers separately.

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Q2. 3rd highest salary employee

Ans.

To find the 3rd highest salary employee, we can use a SQL query with the 'LIMIT' and 'OFFSET' keywords.

Use a SQL query to select distinct salaries in descending order
Use 'LIMIT 1 OFFSET 2' to get the 3rd highest salary
Join this result with the employee table to get the employee details

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Java Developer Interview Questions & Answers

Anonymous

posted on 9 Jun 2024

Interview experience

Excellent

Difficulty level

Easy

Process Duration

Less than 2 weeks

Result

Selected

I applied via Naukri.com and was interviewed in Dec 2023. There were 3 interview rounds.

Round 1 - Coding Test

1 round in fresher Java coding test

Round 2 - Aptitude Test

Second Java aptitude test

Round 3 - Technical

(2 Questions)

Q1. What JDK,JRE,JVM

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Q2. What is inheritance

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an associate

Salary Expectation

Hi Everyone, I am currently working as a QA Engineer (Automation + Manual), having a total of 3.6 yoe primarily in Oracle EBS. Initially used to work with the UFT tool for the first 2 year... read more

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Java Developer Interview Questions & Answers

Anonymous

posted on 4 May 2024

Interview experience

Good

Difficulty level

Process Duration

Result

Round 1 - Technical

(2 Questions)

Q1. What is Static Method?

Ans.

Static method is a method that belongs to the class itself, not to any specific instance of the class.

Static methods can be called without creating an instance of the class.
They are commonly used for utility methods that do not require access to instance variables.
Static methods are declared using the 'static' keyword.
Example: Math.max() is a static method in the Math class that returns the maximum of two numbers.

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Q2. LAMDA EXPRESSION?

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Interview Preparation Tips

Interview preparation tips for other job seekers - Good

Java Developer Interview Questions & Answers

Anonymous

posted on 17 Oct 2023

Interview experience

Good

Difficulty level

Moderate

Process Duration

Less than 2 weeks

Result

I applied via Naukri.com and was interviewed in Sep 2023. There were 2 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.

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Round 2 - Technical

(2 Questions)

Q1. How to make class immutable?

Ans.

To make a class immutable in Java, you can follow certain guidelines to ensure that its state cannot be changed once it is created.

Make the class final so that it cannot be extended.
Make all fields private and final to prevent modification.
Do not provide setter methods for the fields.
If the fields are mutable objects, return copies of them instead of the original objects in getter methods.

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Q2. What is idempotency? Solid ? Design patterns used in projects

Ans.

Idempotency is the property of an operation where multiple identical requests have the same effect as a single request.

Idempotency ensures that even if the same request is made multiple times, the result will be the same.
In RESTful APIs, using HTTP methods like GET and PUT can help achieve idempotency.
Design patterns like Command Pattern and State Pattern can be used to ensure idempotency in projects.

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Get interview-ready with Top Cognizant Interview Questions

Java Developer Interview Questions & Answers

Anonymous

posted on 25 Oct 2023

Interview experience

Average

Difficulty level

Process Duration

Result

I applied via campus placement at St Thomas College, Thrissur

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.

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Round 2 - Aptitude Test

Plain apti test, easy, LRDI, Quant, VARC

Round 3 - Technical

(2 Questions)

Q1. Questions on software, resume based, easy

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Q2. Tell me about yourself

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Java Developer Jobs at Cognizant

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Java Developer

Hyderabad / Secunderabad, Chennai +1

6-11 Yrs

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Face To face Interview with Cognizant - Java Developers!

Hyderabad / Secunderabad, Chennai +1

5-10 Yrs

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Hyderabad / Secunderabad, Chennai

5-10 Yrs

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Face To Face Interview For Java Developers with AWS!!!

Hyderabad / Secunderabad, Chennai +1

5-10 Yrs

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Cognizant Hiring Java Developers

Chennai, Coimbatore +1

5-10 Yrs

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Java Developer

Hyderabad / Secunderabad, Chennai +1

5-10 Yrs

Not Disclosed

Java Developer Interview Questions & Answers

Anonymous

posted on 6 Dec 2023

Interview experience

Good

Difficulty level

Process Duration

Result

Round 1 - Resume Shortlist

Pro Tip by AmbitionBox:

Properly align and format text in your resume. A recruiter will have to spend more time reading poorly aligned text, leading to high chances of rejection.

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Round 2 - Technical

(1 Question)

Q1. About java, spring and spring boot

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Round 3 - HR

(1 Question)

Q1. Why your switching the organisation

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Java Developer Interview Questions & Answers

Anonymous

posted on 30 Jul 2023

Interview experience

Average

Difficulty level

Easy

Process Duration

Less than 2 weeks

Result

Selected

I applied via Naukri.com and was interviewed in Jun 2023. There were 3 interview rounds.

Round 1 - Resume Shortlist

Pro Tip by AmbitionBox:

Double-check your resume for any spelling mistakes. The recruiter may consider spelling mistakes as careless behavior or poor communication skills.

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Round 2 - Aptitude Test

Aptitude test questions java questions

Round 3 - HR

(5 Questions)

Q1. Self introduction project questions

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Q2. Salary deteils quotations

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Q3. Family details and other details

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Q4. Self introductions quations

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Q5. Salari details quations

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Interview Preparation Tips

Interview preparation tips for other job seekers - yes

Java Developer Interview Questions & Answers

Anonymous

posted on 31 May 2023

Interview experience

Good

Difficulty level

Moderate

Process Duration

Result

I applied via Campus Placement

Round 1 - Resume Shortlist

Pro Tip by AmbitionBox:

Do not use an unprofessional email address such as cool_boy@email.com. It shows a lack of professionalism by the candidate.

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Round 2 - Technical

(2 Questions)

Q1. What is java and python

Ans.

Java and Python are programming languages used for developing software applications.

Java is an object-oriented language used for developing desktop, web, and mobile applications.
Python is a high-level language used for web development, data analysis, artificial intelligence, and scientific computing.
Java is compiled and runs on a virtual machine, while Python is interpreted.
Java is statically typed, while Python is dyn...

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Q2. Explain oops concepts

Ans.

OOPs concepts are the fundamental principles of object-oriented programming.

Encapsulation: Hiding the implementation details of an object and exposing only the necessary information.
Inheritance: Creating new classes from existing ones, inheriting their properties and methods.
Polymorphism: The ability of objects to take on many forms, allowing them to behave differently in different situations.
Abstraction: Focusing on t...

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Round 3 - HR

(3 Questions)

Q1. Self introduction

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Q2. Short term goal

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Q3. Long term goal explain

Ans.

To become a technical lead and contribute to the development of innovative solutions.

I aim to continuously improve my technical skills and knowledge.
I want to gain experience in leading a team and managing projects.
I aspire to work on challenging projects that require creative problem-solving.
I hope to make a positive impact on the company and its customers through my work.
Example: I want to lead a team in developing a...

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Java Developer Interview Questions & Answers

Anonymous

posted on 26 Jun 2023

Interview experience

Excellent

Difficulty level

Easy

Process Duration

Less than 2 weeks

Result

Selected

I applied via Company Website and was interviewed in May 2023. There were 4 interview rounds.

Round 1 - Resume Shortlist

Pro Tip by AmbitionBox:

Be truthful in your resume. It is very easy to catch false or lies during the interview by asking basic questions.

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Round 2 - Aptitude Test

Aptitude test for fresher arithmetic,reasoning, English

Round 3 - Coding Test

Java and core java coding basics for fresher

Round 4 - HR

(3 Questions)

Q1. Asking fir self introduced

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Q2. Why should we hire you

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Q3. I have coding skills theory knowledge

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Java Developer Interview Questions & Answers

Anonymous

posted on 12 Oct 2023

Interview experience

Good

Difficulty level

Moderate

Process Duration

2-4 weeks

Result

No response

I applied via Naukri.com and was interviewed in Apr 2023. There were 3 interview rounds.

Round 1 - Resume Shortlist

Pro Tip by AmbitionBox:

Be honest with your years of experience. All information you share will be verified at the time of joining.

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Round 2 - Coding Test

There will be 2 java coding questions related to your job description

Round 3 - Technical

(1 Question)

Q1. Find second largest number using java 8 features Write a java program to reverse a string few questions about springboot and core java

Ans.

Use Java 8 features to find the second largest number and reverse a string.

Use streams and collectors to find the second largest number in an array.
Use StringBuilder to reverse a string in Java 8.
For Spring Boot questions, focus on dependency injection, auto-configuration, and RESTful services.
For core Java questions, focus on OOP concepts, collections, and exception handling.

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Cognizant Interview FAQs

How many rounds are there in Cognizant Java Developer interview?

Cognizant interview process usually has 2-3 rounds. The most common rounds in the Cognizant interview process are Technical, Resume Shortlist and HR.

How to prepare for Cognizant 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 Cognizant. The most common topics and skills that interviewers at Cognizant expect are Java, Microservices, Spring Boot, Hibernate and AWS.

What are the top questions asked in Cognizant Java Developer interview?

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

What array list and linkedlist difference,how hashmap internally working,what i...read more
write program fibonacci series, write program using boolean, write class cast e...read more
Difference between List and Set? which one to prefer in which requirements and ...read more

How long is the Cognizant Java Developer interview process?

The duration of Cognizant Java Developer interview process can vary, but typically it takes about less than 2 weeks to complete.

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Cognizant Java Developer Interview Process

based on 24 interviews

3 Interview rounds

Resume Shortlist Round
Aptitude Test Round
HR Round

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Cognizant Java Developer Salary

based on 1.6k salaries

₹2.4 L/yr - ₹14.6 L/yr

41% more than the average Java Developer Salary in India

View more details

Java Developer Jobs at Cognizant

Java Developer

Hyderabad / Secunderabad,

Chennai

6-11 Yrs

Not Disclosed

Face To face Interview with Cognizant - Java Developers!

Hyderabad / Secunderabad,

Chennai

5-10 Yrs

Not Disclosed

Java Developer

Hyderabad / Secunderabad,

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5-10 Yrs

Not Disclosed

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