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Celusion Technologies Java Developer Interview Questions and Answers
Celusion Technologies Java Developer Interview Experiences
1 interview found
Anonymous
I applied via Approached by Company
(2 Questions)
- Q1. Spring OOPS Hibernate
- Q2. Project More into Jquery
(1 Question)
- Q1. Core Java Advance Java Spring MVC
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Interview questions from similar companies
(2 Questions)
- Q1. What is the difference between == and .equals() in Java?
- Ans.
In Java, == compares memory addresses while .equals() compares the actual content of objects.
== compares memory addresses of objects, while .equals() compares the actual content.
== is used to compare primitive data types, while .equals() is used to compare objects.
Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will be false, but str1.equals(str2) will be true.
- Q2. ==compares object references (memory location) .equals() compares the actual content or values of the objects.
- Ans.
The question explains the difference between == and .equals() in Java for comparing object references and content.
Use == to compare object references (memory location)
Use .equals() to compare the actual content or values of the objects
Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will be false, but str1.equals(str2) will be true
Interview Preparation Tips
I applied via Walk-in and was interviewed in Nov 2024. There were 2 interview rounds.
Questions on string and arrays both are moderate level questions on hacherrank type for 20 marks
(2 Questions)
- Q1. Constructor chaining
- Q2. Hasmap and treemap
I applied via Naukri.com and was interviewed in Feb 2024. There was 1 interview round.
There were 5 questions and we need to solve 4 questions in java. Mostly Array and string based.
I applied via Approached by Company and was interviewed in Mar 2023. There were 3 interview rounds.
(3 Questions)
- Q1. What is java ?
- Ans.
Java is a high-level programming language known for its portability, security, and object-oriented features.
Java is platform-independent, meaning it can run on any device with a Java Virtual Machine (JVM).
It is object-oriented, allowing for modular and reusable code.
Java is known for its security features, such as sandboxing and encryption.
Popular frameworks and libraries like Spring and Hibernate are commonly used in
- Q2. Opps concepts collections
- Q3. Data structures
(2 Questions)
- Q1. Opps and collections
- Q2. Must know about collections
Interview Preparation Tips
Skills evaluated in this interview
Selected
I applied via campus placement at National Institute of Technology (NIT), Warangal and was interviewed in Jul 2022. There were 3 interview rounds.
Their are 30 questions which one has to done in 30 mins
(2 Questions)
- Q1. Q1) About the project you have done
- Q2. Q2) some technical questions related to core Java
Interview Preparation Tips
(2 Questions)
- Q1. How can you create immutable class in Java?
- Ans.
Immutable class in Java cannot be modified after creation, ensuring data integrity.
Make the class final so it cannot be extended
Make all fields private and final so they cannot be modified
Do not provide setter methods, only getter methods to access the fields
If the class contains mutable objects, make sure to return a deep copy of them in getter methods
- Q2. 1 : Declare the class as final. 2 : Make all fields private and final. 3 : Provide no setter methods.
- Ans.
The question is asking to create a class with certain restrictions like being final, having private and final fields, and no setter methods.
Declare the class as final to prevent it from being subclassed.
Make all fields private and final to ensure encapsulation and immutability.
Provide no setter methods to enforce read-only access to the fields.
Java Developer Interview Questions & Answers
Thinkitive Technologies
Rupali Gaikar
posted on 8 Aug 2024
I applied via Naukri.com and was interviewed in Jul 2024. There was 1 interview round.
(1 Question)
- Q1. Oops Concepts ,Absrtraction,Polymorphism
(2 Questions)
- Q1. What is the purpose of static keyword in Java?
- Ans.
The static keyword in Java is used to create class-level variables and methods that can be accessed without creating an instance of the class.
Static variables are shared among all instances of a class.
Static methods can be called without creating an instance of the class.
Static blocks are used to initialize static variables.
Static keyword can also be used to create static nested classes.
- Q2. The static keyword is used to create class-level variable and methods ............etc.
I applied via LinkedIn and was interviewed in Apr 2024. There were 2 interview rounds.
Q.1 Pattern
1
*2*
**3**
Q. 2
write code to get sub array with max sum from given array.
(1 Question)
- Q1. Introduction Project Deatails Oops Concept Collection Exception Handling Abstract Class Functional Interface Spring Framework
Interview Preparation Tips
- Java
- Advanced Java
- SQL
- Data Structures
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