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Oracle Research Scientist Interview Questions and Answers
Oracle Research Scientist Interview Experiences
1 interview found
I applied via LinkedIn and was interviewed in Jun 2024. There was 1 interview round.
(2 Questions)
- Q1. How do you preprocess large/small dataset
- Ans.
Preprocessing large/small datasets involves cleaning, transforming, and organizing data to prepare it for analysis.
Remove duplicates and missing values
Normalize or standardize numerical features
Encode categorical variables
Feature scaling
Handling outliers
Dimensionality reduction techniques like PCA
Splitting data into training and testing sets
- Q2. Data augmentation
Interview Preparation Tips
Interview questions from similar companies
Coding round 2 questions
I applied via Approached by Company and was interviewed before Jun 2021. There were 2 interview rounds.
(1 Question)
- Q1. Advantage and disadvantage of framework.
- Ans.
Frameworks provide structure and pre-built components for software development, but can also limit flexibility and require learning curve.
Advantage: Provides structure and pre-built components for faster development
Advantage: Can improve code quality and maintainability
Disadvantage: Can limit flexibility and customization
Disadvantage: Requires learning curve and potential dependency issues
Example: ReactJS provides a fr...
(1 Question)
- Q1. What is Oops? Advantage and disadvantage
- Ans.
Oops stands for Object-Oriented Programming. It is a programming paradigm that uses objects to represent real-world entities.
Advantages: code reusability, modularity, encapsulation, inheritance, polymorphism
Disadvantages: complexity, steep learning curve, performance overhead
Example: creating a class 'Car' with properties like 'make', 'model', and 'year', and methods like 'start_engine' and 'stop_engine'
Interview Preparation Tips
Skills evaluated in this interview
Senior Software Engineer Interview Questions & Answers
Carelon Global Solutions
Anonymous
posted on 8 Jan 2021
Interview Questionnaire
1 Question
- Q1. Technical questions from data warehousing and ETL Concept , SQL Queries and Unix
What people are saying about Oracle
I applied via Company Website and was interviewed before Oct 2019. There were 4 interview rounds.
Interview Questionnaire
1 Question
- Q1. 1. Core Java - OOPS features, Abstract classes and Interface, Inner Classes, String and Object Class, Equals and HashCode methods, Runtime and Compile time exception, Method overloading and overriding, Cus...
Interview Preparation Tips
2. Basic DB queries
3. Basic Unix commands
I applied via Campus Placement and was interviewed before Nov 2021. There were 3 interview rounds.
Numerical and logical aptitude test
There are 5 rounds on datastructure and algorithm
Interview Preparation Tips
Good and smoth interview experiance
Software Engineer Interview Questions & Answers
Microsoft Corporation
Anonymous
posted on 16 Sep 2021
I appeared for an interview before Sep 2020.
(1 Question)
Round duration - 50 minutes
Round difficulty - Easy
This was a Data Structural round.
- Q1.
Distinct Islands Problem Statement
Given a two-dimensional array/list consisting of integers 0s and 1s, where 1 represents land and 0 represents water, determine the number of distinct islands. A group of...
- Ans.
Count the number of distinct islands in a 2D array of 0s and 1s.
Identify islands by performing depth-first search (DFS) on the grid
Use a set to store the shape of each island and check for duplicates
Consider translations to determine distinct islands
(1 Question)
Round duration - 50 minutes
Round difficulty - Easy
This was a Data Structural round.
- Q1.
Word Wrap Problem Statement
You are tasked with arranging 'N' words of varying lengths such that each line contains at most 'M' characters, with each word separated by a space. The challenge is to minimiz...
- Ans.
The goal is to minimize the total cost of arranging 'N' words on each line with a maximum character limit 'M'.
Calculate the cost of each line as the cube of extra space characters needed to reach 'M'.
Minimize the total cost by arranging words to fit within the character limit on each line.
Ensure each word appears fully on one line without breaking across lines.
(1 Question)
Round duration - 60 minutes
Round difficulty - Easy
This was a System Design round.
- Q1. Can you design a system similar to Red Bus that can handle bookings and onboard both vendors and customers to the platform?
- Ans.
Design a system similar to Red Bus for handling bookings and onboarding vendors and customers.
Implement a user-friendly interface for customers to search and book tickets
Create a vendor portal for vendors to manage their offerings and availability
Include payment gateway integration for secure transactions
Develop a robust backend system for managing bookings, cancellations, and refunds
Utilize a database to store user in...
Round duration - 50 minutes
Round difficulty - Easy
This was a System Design round
Round duration - 50 minutes
Round difficulty - Easy
This was an HR round.
Interview Preparation Tips
Tip 1 : Practice as much as you can.
Tip 2 : Prepare for company, not in general.
Tip 3 : Your past work should be objective and your contribution should be very clear
Tip 1 : Keep only relevant things for the job you are applying.
Tip 2 : Minimal data with measurable contribution and effect.
Skills evaluated in this interview
Interview Questionnaire
8 Questions
- Q1. WRITE A GENERIC SWAP FUNCTION
- Ans.
A generic swap function swaps two values of any data type.
The function should take two parameters of any data type.
Use a temporary variable to store the value of one parameter.
Assign the value of the second parameter to the first parameter.
Assign the value of the temporary variable to the second parameter.
- Q2. SEARCH AN ELEMENT IN ROTATED SORTED LINKLIST .
- Ans.
Search for an element in a rotated sorted linked list.
Find the pivot point where the list is rotated.
Divide the list into two sublists based on the pivot point.
Perform binary search on the appropriate sublist.
Handle edge cases such as empty list and list with only one element.
- Q3. SEARCH AN ELEMENT IN ROTATED SORTED ARRAY. WRITED A CODE FOR IT
- Ans.
Search an element in a rotated sorted array
Find the pivot point where the array is rotated
Divide the array into two sub-arrays based on pivot point
Perform binary search on the appropriate sub-array
Repeat until element is found or sub-array size is 1
- Q4. In an Array of size 95 contain numbers in range 1 to 100. each number is at max once in the array. find the 5 missing numbers in array between 1-100
- Q5. Given sudoku as id array of size . in a given empty cell find the possible numbers that could be possible. Asked me to write code for it
- Ans.
Given a Sudoku board, find possible numbers for an empty cell.
Iterate through empty cells and check possible numbers using row, column, and box constraints.
Use a set to keep track of possible numbers for each empty cell.
Return the set of possible numbers for the given empty cell.
- Q6. Given 4 unsigned integers find their integer average (eg. (2,2,2,3) => (2+2+2+3)/4 = 2) consider integer division ) without typecasting
- Ans.
Find integer average of 4 unsigned integers without typecasting
Add all the integers and divide by 4
Use bit shifting to divide by 4
Handle overflow by using long long data type
Use unsigned int data type for input
- Q7. Write a code to identify wheter given processor is of 32 bit architecture or 64 bit architecture
- Ans.
Code to identify 32 bit or 64 bit architecture of a processor
Check if the operating system is 32 bit or 64 bit
If OS is 32 bit, processor is 32 bit
If OS is 64 bit, check if processor supports 64 bit architecture
Use CPUID instruction to check if processor supports 64 bit architecture
- Q8. Convert a binary number into base 64 integer
- Ans.
Convert binary number to base 64 integer
Divide the binary number into groups of 6 bits
Convert each group of 6 bits to decimal
Map the decimal value to the corresponding base 64 character
Concatenate the base 64 characters to form the final integer
Interview Preparation Tips
Experience: SIMPLE CODING QUESTIONS SPEED MATTERS.
Duration: 60 minutes
Total Questions: 3
Skills: Analytics And Coding
College Name: IIT Guwahati
Skills evaluated in this interview
Interview Questionnaire
6 Questions
- Q1. Solving puzzles(25 horses,ant and sweets,height of a building..) try as many as possible before appearing for interview
- Q2. If experienced , then project details of previous companies a must prepare question
- Q3. Writing test cases for random scenarios
- Ans.
Creating test cases for random scenarios ensures software reliability and robustness through diverse input validation.
Identify edge cases: Test with minimum and maximum input values, e.g., an empty array vs. a large array.
Use random data: Generate random inputs to simulate real-world usage, e.g., random user names or passwords.
Test invalid inputs: Ensure the system handles unexpected inputs gracefully, e.g., negative n...
- Q4. Programming in whatsoever language you r comfortable with, basic coding problems of DS,Algos. eg. Zigzag tree traversal algo,random linked list copy
- Q5. Some people asked me questions related to the work i will do if hired in the project
- Q6. Be genuine in ur CV, and be prepared with everything you write there.
Interview Preparation Tips
Interview Preparation Tips
College Name: NIT SURATHKAL
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