HCLTech Senior Software Engineer Interview Questions and Answers for Experienced

Q1. Singleton class implementation Basic Java 8 Hash map working
Add your answer
Q2. Hash collision how to avoid Vector vs arraylist
Add your answer

Q1. Asked regarding frameworks in automatically worked in project
Add your answer

Q1. Multiple questions from Microservice
Add your answer
Q2. Multiple questions on Spring boot
Add your answer
Q3. Design pattern JAVA
Add your answer

Q1. Concepts of javascript
Add your answer
Q2. Concepts of React
Add your answer

Q1. Difference between interface and abstraction
Ans. 
Interface defines a contract for a class to implement, while abstraction is a concept that hides implementation details.
• Interface is a blueprint of a class that defines methods without implementation

• Abstraction is a concept that hides implementation details and only shows necessary features

• Interfaces can have multiple inheritance, while abstraction is achieved through abstract classes or interfaces

• Example: Interface 'S...read more
Answered by AI
Add your answer
Q2. Difference between var and dynamic
Ans. 
var is statically typed while dynamic is dynamically typed in C#.
• var is resolved at compile time while dynamic is resolved at runtime.

• var is used for implicitly typed local variables while dynamic is used for dynamic types.

• var cannot change its type once declared while dynamic can change its type at runtime.
Answered by AI
Add your answer
Q3. Why we go for abstraction and interface
Ans. 
Abstraction and interfaces help in achieving code reusability, flexibility, and maintainability in software development.
• Abstraction allows us to hide complex implementation details and focus on the essential features of an object.

• Interfaces define a contract for classes to implement, promoting loose coupling and enabling polymorphism.

• Abstraction and interfaces facilitate code reusability by allowing different classes t...read more
Answered by AI
Add your answer
Q4. Whysingeltone is importrant
Ans. 
Singleton pattern ensures only one instance of a class is created and provides a global point of access to it.
• Prevents multiple instances of a class, saving memory and resources

• Provides a global point of access to the instance

• Useful for managing shared resources such as database connections or configuration settings
Answered by AI
Add your answer

First Given a Some problem solving question, Once solved the question and moved next round at same day.

Q1. Technical related question like oops concept and how to implement on application like that
Add your answer
Q2. What is OOPs concept?
Ans. 
OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOPs focuses on creating objects that interact with each other to solve a problem.

• It involves concepts like classes, objects, inheritance, polymorphism, and encapsulation.

• Classes are blueprints for creating objects, while objects are instances of c...read more
Answered by AI
Add your answer
Q3. What is Temp table
Ans. 
Temp table is a temporary table that is created in memory or on disk to store data temporarily during a session.
• Temp tables are used to store intermediate results within a session.

• They are typically used in complex queries or procedures to improve performance.

• Temp tables are automatically dropped when the session ends or when explicitly dropped by the user.
Answered by AI
Add your answer