Philips Innovation Campus Software Technologist 1 Interview Questions, Process, and Tips

I worked on the Observer design pattern

• Observer pattern is used for one-to-many object dependency

• It defines a one-to-many relationship between objects

• When one object changes state, all its dependents are notified and updated automatically

• Example: A weather station that notifies its observers (display devices) when the temperature changes

Multi-threaded program to print even and odd numbers up to 100

• Create two threads, one for even numbers and one for odd numbers

• Use a loop to iterate through numbers 1 to 100

• In each iteration, check if the number is even or odd

• Print the number in the corresponding thread

• Join the threads to ensure all numbers are printed in order

IOC container is a software design pattern that manages the instantiation and configuration of objects.

• IOC stands for Inversion of Control

• IOC container is used to decouple the execution of a task from its implementation

• It allows for easier testing and maintenance of code by promoting loose coupling

• Examples of IOC containers include Spring Framework's ApplicationContext and Unity Container in .NET

To find the second highest number from a list of numbers.

• Sort the list in descending order

• Return the second element in the sorted list

The n+1 problem in Hibernate refers to the issue of making n+1 database queries instead of a single query when fetching related entities.

• Occurs when fetching a collection of entities and then accessing a lazy-loaded association for each entity individually

• Can be resolved by using fetch joins or batch fetching to reduce the number of queries

• Example: Fetching a list of orders and then accessing the customer for each orde