Oracle Senior Software Engineer 4 Interview Questions, Process, and Tips

Questions on react , majorly focus on basics

Q1. Question on coding react
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Q1. Machine coding round
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Q1. Cultural fit questions
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Discussion about in details technical aspects of project

Q1. After five years how we looks our self in this company.
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Q2. How we associated our work experiences to company job profile.
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Very hard question and 4 qs in total

Q1. Tell me about yourself
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Q1. Tell me about 5 years after now
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Q1. Oops relate questions
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Q2. Coding questions like output
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Q1. Implement hashmap in java
Ans. 
Implementing hashmap in Java
• Create an array of linked lists to store key-value pairs

• Hash the key to get the index of the array

• Insert the key-value pair at the index in the linked list

• Handle collisions by chaining

• Implement methods like put(), get(), remove()

• Use generics to allow any type of key-value pairs
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Q1. Design round related to chat application
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Q1. Design round, system design general questions
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Q1. General discussions about team and tech stack
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Coding round where questions based on arrays and strings were asked

Q1. OOPS in Java Programming Language
Ans. 
OOPS in Java is a programming paradigm that emphasizes on objects and their interactions.
• OOPS stands for Object-Oriented Programming System

• Java is an OOPS language that supports encapsulation, inheritance, and polymorphism

• Encapsulation is the process of hiding data and methods within a class

• Inheritance allows a subclass to inherit properties and methods from a superclass

• Polymorphism allows objects to take on multiple f...read more
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Q2. Multithreading Concept in Java Programming Language
Ans. 
Multithreading in Java allows multiple threads to execute concurrently within a single program.
• Multithreading improves performance by allowing multiple tasks to run simultaneously.

• Java provides built-in support for multithreading through the Thread class and Runnable interface.

• Synchronization is important to prevent race conditions and ensure thread safety.

• Examples of multithreading in Java include GUI applications, se...read more
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Q3. Collections Framework In Java Programming Language
Ans. 
Collections Framework is a set of classes and interfaces that provide reusable data structures in Java.
• It provides interfaces like List, Set, Queue, etc. for storing collections of objects.

• It also provides classes like HashMap, TreeMap, etc. for storing key-value pairs.

• It simplifies the process of storing and manipulating data in Java programs.

• It improves the performance of Java programs by providing efficient data str...read more
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Q4. Exception Handling in Java Programming Language
Ans. 
Exception handling is a mechanism to handle runtime errors in Java programs.
• Exceptions are objects that are thrown at runtime when an error occurs

• try-catch block is used to handle exceptions

• finally block is used to execute code regardless of whether an exception is thrown or not

• Java provides built-in exceptions like ArithmeticException, NullPointerException, etc.

• Custom exceptions can also be created by extending the Ex
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Q1. Discussed about my java projects
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Q2. Discussion about the role I am going to join
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Q1. Basics of OOPS, .NET Core, Angular
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Q1. Scenario based questions on .Net Core, AWS Services
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Round duration - 60 Minutes
Round difficulty - Easy

The first round was conducted on HackerRank platform and comprised of 10 MCQs and 2 coding questions.
Both the coding questions expected optimised solution (brute force wouldn’t work).

Q1. 
Subarray Sums I Problem Statement
You are provided with an array of positive integers ARR that represents the strengths of different “jutsus” (ninja techniques). You are also given the strength of the ene...read more
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Q2. 
Minimum Number of Platforms Problem
Your task is to determine the minimum number of platforms required at a railway station so that no train has to wait.
Explanation:
Given two arrays:
• AT - represent...read more
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Round duration - 60 Minutes
Round difficulty - Medium

The interview began with my introduction. The interviewer was very friendly and asked me a few questions about myself, my hobbies, etc.

Q1. 
Merge Sort Problem Statement
You are given a sequence of numbers, ARR. Your task is to return a sorted sequence of ARR in non-descending order using the Merge Sort algorithm.
Explanation:
The Merge Sort...read more
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Q2. 
Remove Duplicates Problem Statement
You are given an array of integers. The task is to remove all duplicate elements and return the array while maintaining the order in which the elements were provided.
...read more
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Round duration - 60 Minutes
Round difficulty - Easy

This was conducted on the Codepair platform on HackerRank and the interviewer was in face-time with me. There were 3 questions to be coded.

Q1. 
Move Zeroes to End Problem Statement
Given an unsorted array of integers, modify the array such that all the zeroes are moved to the end, while maintaining the order of non-zero elements as they appear or...read more
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Q2. 
Shape and Method Overriding Problem Statement
Create a base class called Shape that contains a field named shapeType and a method printMyType.
Implement two derived classes:
• Square: This class inheri...read more
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Q3. 
DFS Traversal Problem Statement
Given an undirected and disconnected graph G(V, E), where V is the number of vertices and E is the number of edges, the connections between vertices are provided in the 'GR...read more
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