Oracle Application Developer Interview Questions, Process, and Tips

Q1. The first round is the test which usually involves 4 sections that include Aptitude, Dbms, Java Core and Os.
Ans. 
The first round of the Application Developer interview involves a test with sections on Aptitude, Dbms, Java Core, and Os.
• The test will likely assess your general problem-solving skills and knowledge of specific programming languages and systems.

• Be prepared to answer questions about database management, Java programming, and operating systems.

• Examples of questions might include writing code to solve a problem, identify...read more
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Q1. After you clear the test then you get a call from the Hr or the hiring manager sharing the details of your first interview. In this interview a total of two team members will interview you on various subje...read more
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Q1. After you clear the first interview round the second interview round is scheduled and this usually a mixture of Technical and Managerial round. You will still be asked Ds Algo, puzzles so prepare accordin...read more
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Round duration - 60 Minutes
Round difficulty - Medium

This was a proctured online coding test where we had 2 questions to solve under 60 minutes.

Q1. 
Minimum Cost to Connect All Points Problem Statement
Given an array COORDINATES representing the integer coordinates of some points on a 2D plane, determine the minimum cost required to connect all points...read more
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Q2. 
Count Inversions Problem Statement
Given an integer array ARR of size N, your task is to find the total number of inversions that exist in the array.
An inversion is defined for a pair of integers in the...read more
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Round duration - 60 Minutes
Round difficulty - Medium

This round had 1 question of DSA followed by some questions from DBMS and Java. I was also made to execute a SQL query at the end.

Q1. 
Remove the Kth Node from the End of a Linked List
You are given a singly Linked List with 'N' nodes containing integer data and an integer 'K'. Your task is to delete the Kth node from the end of this Lin...read more
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Q2. Can you explain the different types of normalization forms in a DBMS?
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Q3. Can you write a SQL query that joins two tables A and B on the common attribute ID and selects records (ID_NAME) that have matching ID values in both tables?
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Q4. Why is Java considered platform independent, while the Java Virtual Machine (JVM) is platform dependent?
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Round duration - 60 Minutes
Round difficulty - Medium

This round had two preety straight forward questions related to DSA and then there were 2 puzzles.

Q1. 
Find All Occurrences in Matrix
You are provided with a matrix of characters, CHARACTER_MATRIX of size M x N, and a string WORD. Your goal is to locate and display all occurrences of the string within the ...read more
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Q2. 
Greatest Common Divisor Problem Statement
You are tasked with finding the greatest common divisor (GCD) of two given numbers 'X' and 'Y'. The GCD is defined as the largest integer that divides both of the...read more
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Round duration - 30 Minutes
Round difficulty - Easy

This was a typical HR round with some standard Behavioral questions.

Q1. Why do you want to be a part of Oracle?
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The test had 15 aptitude and 2 coding questions

Q1. 1. technical questions based on OOPS
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Q2. 2. Coding question on trees
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Round duration - 60 Minutes
Round difficulty - Medium

This was an online proctured coding test where we had 2 questions to solve under 60 minutes. The questions were of Easy to Medium level.

Q1. 
Infix to Postfix Conversion
You are provided with a string EXP which represents a valid infix expression. Your task is to convert this given infix expression into a postfix expression.
Explanation:
An i...read more
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Q2. 
Subarray Challenge: Largest Equal 0s and 1s
Determine the length of the largest subarray within a given array of 0s and 1s, such that the subarray contains an equal number of 0s and 1s.
Input:
Input beg...read more
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Round duration - 60 Minutes
Round difficulty - Medium

In this round, the interviewer asked me 2 questions related to DSA and then some questions from OS were asked to check basic understanding of the subject.

Q1. 
Palindromic Substrings Problem Statement
Given a string S, your task is to return all distinct palindromic substrings of the given string in alphabetical order.
Explanation:
A string is considered a pal...read more
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Q2. 
LCA of Binary Tree Problem Statement
You are given a binary tree consisting of distinct integers and two nodes, X and Y. Your task is to find and return the Lowest Common Ancestor (LCA) of these two nodes...read more
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Q3. What are the differences between a mutex and a semaphore?
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Q4. Can you explain the concepts of multitasking and multiprogramming?
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Round duration - 60 Minutes
Round difficulty - Medium

This round had 2 questions from DSA which were followed by some core concepts from OOPS and Java.

Q1. 
Merge Two Sorted Linked Lists Problem Statement
You are provided with two sorted linked lists. Your task is to merge them into a single sorted linked list and return the head of the combined linked list.
...read more
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Q2. 
Heap Sort Problem Statement
Your task is to sort an array of integers in non-decreasing order using the Heap Sort algorithm.
Input:
The first line contains an integer 'T' denoting the number of test cas...read more
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Q3. What is the difference between an Abstract Class and an Interface in Java?
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Q4. Can you explain the concepts of method overloading and method overriding in object-oriented programming?
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Round duration - 30 Minutes
Round difficulty - Easy

This was a typical HR round with some standard Behavioral questions.

Q1. Can you tell me something about yourself?
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Q2. Why do you want to be a part of Oracle?
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