HCL Infosystems Java Software Developer Interview Questions and Answers

Q1. What is difference between abstract class and interface
Ans. 
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructor, fields, and methods, while interface cannot have any of these.

• A class can implement multiple interfaces but can only extend one abstract class.

• Abstract classes are used to provide a common base for subclasses, while interfaces are used to define a contract for classes to im...read more
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Q2. What is difference between arraist and linked list
Ans. 
Arrays store elements in contiguous memory locations, while linked lists store elements in nodes with pointers to the next node.
• Arrays have fixed size, while linked lists can dynamically grow or shrink.

• Accessing elements in arrays is faster (O(1)), while accessing elements in linked lists is slower (O(n)).

• Inserting or deleting elements in arrays can be inefficient as it may require shifting elements, while in linked li
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Q1. Jira/Agile related questions, and how you handle it in your current project?
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Q2. How you handle Exception in Spring Boot?
Ans. 
Exception handling in Spring Boot involves using try-catch blocks, global exception handlers, and custom exception classes.
• Use try-catch blocks to handle exceptions within specific methods.

• Implement global exception handlers to handle exceptions across the entire application.

• Create custom exception classes to handle specific types of exceptions.

• Use the @ExceptionHandler annotation to define methods that handle specific...read more
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Q3. What are JPA entity graphs?
Ans. 
JPA entity graphs define the relationships between entities and specify which attributes to fetch.
• JPA entity graphs are used to optimize database queries by specifying the relationships between entities.

• They allow developers to define which attributes of an entity should be fetched from the database.

• Entity graphs can be defined using annotations or programmatically using the JPA API.

• By using entity graphs, developers c...read more
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Q4. What's JVM memory model?
Ans. 
JVM memory model defines how Java programs allocate and manage memory.
• JVM memory model is divided into several areas like heap, stack, method area, etc.

• Heap is used for dynamic memory allocation, while stack is used for method calls and local variables.

• Method area stores class-level data like bytecode, constant pool, etc.

• JVM memory model ensures memory safety through garbage collection.

• Examples of JVM memory management...read more
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Q1. Tell me about your self? My name is sireesha. I am from allure. I am pursuing Bsc statistics final year in Basireddy memorial degree college from Rayalasima university,Nandikotkur.
Ans. My name is sireesha. I am from allure. I am pursuing Bsc statistics final year in Basireddy memorial degree college from Rayalasima university,Nandikotkur
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Q2. What are your strengths? My strengths are i am self motivated,hardworking and I am discipline person.
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Q3. What are your skills? C language and java
Ans. 
Proficient in C language and Java programming with experience in developing software applications.
• Strong understanding of data structures and algorithms in C language

• Experience in developing web applications using Java

• Knowledge of object-oriented programming principles in Java

• Familiarity with Java frameworks like Spring and Hibernate
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Q4. What are your hobbies? My hobbies are watching tv,listening to music,cooking.
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Q5. What is the difference between confidence and overconfidence? According to me confidence is the thought I can do and overconfidence is the thought of only i can do.
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Q6. What are the differences between hardwork and smartwork? Hardwork and smart work both are the same key to success. Hard work gives experience and smart work comes from experience.
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Q7. Why should I hire you? As a fresher,I need a platform to prove my skill.If i am in your company I will put my skills. If you hire me I will get professional knowledge and experience also
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Q1. Core Java intermediate
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Q2. Spring boot annotations
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Q1. Explain about your project
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Q2. What is daily task/role
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Be an freshers aptitude and reasoning skills are important

To prove my coding levels in the exam is very important for freshers

Q1. The interview was test my skills if i was perfect in infosys company
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Q1. Salary discussion, relocate and flexible for any locations
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Q1. Reverse a string
Ans. 
Reverse a string using built-in functions or manually iterating through the characters.
• Use StringBuilder's reverse() method to reverse the string.

• Iterate through the characters of the string and append them in reverse order to a new string.

• Use recursion to reverse the string.
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Q1. All questions was related to my project . Technical and management round in same interview call of totally 1 hour .
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