Celusion Technologies Java Developer Interview Questions and Answers

Questions on string and arrays both are moderate level questions on hacherrank type for 20 marks

Q1. Constructor chaining
Add your answer
Q2. Hasmap and treemap
Add your answer

There were 5 questions and we need to solve 4 questions in java. Mostly Array and string based.

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
Answered by AI
Add your answer
Q2. Opps concepts collections
Add your answer
Q3. Data structures
Add your answer

Q1. Opps and collections
Add your answer
Q2. Must know about collections
Add your answer

Their are 30 questions which one has to done in 30 mins

Q1. Q1) About the project you have done
Add your answer
Q2. Q2) some technical questions related to core Java
Add your answer

Q1. Oops Concepts ,Absrtraction,Polymorphism
Add your answer

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.
Answered by AI
Add your answer
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
Answered by AI
Add your answer

Q.1 Pattern
1
*2*
**3**
Q. 2
write code to get sub array with max sum from given array.

Q1. Introduction Project Deatails Oops Concept Collection Exception Handling Abstract Class Functional Interface Spring Framework
Add your answer