IFS Intern - Software Engineer - Unified Support interview questions

Explain the usage of object-oriented programming.

Define inheritance in the context of object-oriented programming.

Discuss the types of inheritance in OOP.

Compare and contrast multiple inheritance and multilevel inheritance.

Confirm whether Java supports multiple inheritance or not.

Share your approach to implementing abstraction in your projects.

Please provide the final output of the given Java code: class A { public static void main(String[] args) { // non-final variable int a = 5; // final variable final int b = 6; a++; b++; } }

How would you implement a pattern like the one below using your familiar programming language? * ** *** **** *****

Determine the output of the following Java code: class B { public static void main(String[] args) { int k = 55; try { System.out.println("In try block"); int t = k/55; } catch (ArithmeticException e) { System.out.println("In catch block"); System.out.println("Dividing by zero but caught"); } finally { System.out.println("Execution, whether an exception occurs or not"); } } }

Describe the objects you typically find in the projects you have developed.

In a scenario where one user can go on many trips and a trip can be visited by many users, what kind of relationship exists between a user and trips?

In a many-to-many (m:m) relationship, how many tables are needed in a relational database management system (RDMS)?

Assuming the trip table has trip ID as the primary key and user ID in the user table as the primary key, in a one-to-many (1:m) relationship, which key would be the foreign key in the other table?

In a many-to-many (m:m) relationship, such as students and subjects, how many tables are needed to map this relationship in a database?

Explain the difference between a database and a database management system (DBMS).

Discuss the purpose of using indexes in a database.

Highlight the differences between an array and an ArrayList.

Explain the differences between a stack and a queue.

Given an array with 10 digits, describe the data structure you would use to find the summation of these values.

In a dark room, there are 10 red gloves and 10 blue gloves. The goal is to pick gloves one by one, aiming to have a matching pair in color. How many gloves do you need to pick to achieve this?