Tekskills Software Engineer Interview Questions, Process, and Tips

OOPs in Java stands for Object-Oriented Programming which is a programming paradigm based on the concept of objects.

• OOPs is a way of programming that focuses on objects and their interactions

• It involves concepts like inheritance, polymorphism, encapsulation, and abstraction

• Java is an object-oriented programming language that supports OOPs concepts

• Example: Creating a class for a car with properties like make, model, and

Collections are data structures that store and organize objects in Java.

• Collections provide a way to group related objects together.

• They can be used to perform operations on groups of objects, such as sorting or searching.

• Examples of collections include lists, sets, and maps.

Exception handling is a mechanism to handle runtime errors and prevent program crashes.

• It allows the program to gracefully handle errors and continue execution.

• It involves catching and handling exceptions using try-catch blocks.

• Common exceptions include null pointer, arithmetic, and array index out of bounds.

• Proper exception handling improves code reliability and maintainability.

Multi threading is the ability of a program to perform multiple tasks concurrently.

• It allows for better utilization of CPU resources

• It can improve program performance and responsiveness

• Examples include web servers handling multiple requests simultaneously

• It requires careful synchronization to avoid race conditions and deadlocks

JDBC connection pooling is a technique of reusing database connections to improve performance.

• Connection pooling reduces the overhead of creating and destroying database connections.

• It maintains a pool of pre-initialized connections that can be reused by multiple clients.

• It improves application scalability and performance by reducing the time spent in establishing a new connection.

• Popular connection pooling frameworks