Fidelis Technology Services Interview Questions and Answers

We are using Spring Boot 2.5.3 and Java 11 in our project.

• Spring Boot version: 2.5.3

• Java version: 11

Factory design pattern is a creational pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.

• Factory design pattern is used to create objects without specifying the exact class of object that will be created.

• It provides a way to delegate the instantiation logic to child classes.

• One example is the Factory Method pattern, where a superclass provides an interface for creating objects, but ...read more

Transactional annotation is used in Spring framework to manage transactions in a declarative way.

• Transactional annotation is used to define the scope of a single database transaction.

• It ensures that if any operation within the transaction fails, the entire transaction is rolled back.

• It simplifies the code by handling transaction management automatically.

• It can be applied at class level or method level in Spring applications.

Use a loop to iterate through the string and count the occurrences of the given character.

• Iterate through the string using a loop

• Check each character if it matches the given character

• Increment a counter if a match is found

• Return the counter as the frequency of the given character

Iterate through the array to find the second largest number.

• Iterate through the array and keep track of the largest and second largest numbers.

• Compare each element with the largest and second largest numbers to update them accordingly.

• Return the second largest number once the iteration is complete.

Design a database schema for an employee database

• Create a table for employees with fields like employee_id, name, department, position, etc.

• Consider adding tables for departments, positions, and any other related entities

• Include relationships between tables using foreign keys

• Ensure data integrity with constraints like unique keys and not null constraints