DataMetica Big Data Developer Interview Questions and Answers

Competitive coding, multiple choice questions

Q1. CS fundamentals, Object oriented programming, Networking, SQL
Add your answer
Q2. Explain 4 concept of OOPS
Ans. 
OOPS concepts include Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.
Answered by AI
Add your answer
Q3. Explain subnet in networking
Ans. 
A subnet is a smaller network within a larger network, created by dividing the IP address range of the larger network.
• Subnets help in organizing and managing network resources efficiently.

• They allow for better security by isolating different parts of the network.

• Subnets can be created by dividing an IP address range into smaller ranges.

• For example, a company may have different subnets for different departments like HR,
Answered by AI
Add your answer
Q4. Concepts of Operating system
Add your answer

Q1. Behavioral questions, questions related to project, questions related to internship
Add your answer

The basic question is related to profit percentage, time and distance

Q1. Is the database schema of any type?
Ans. 
Yes, the database schema can be of various types such as relational, hierarchical, network, object-oriented, etc.
• Relational database schema is the most common type, using tables to store data with relationships between them.

• Hierarchical database schema organizes data in a tree-like structure.

• Network database schema allows multiple relationships between records.

• Object-oriented database schema stores data as objects with...read more
Answered by AI
Add your answer

BASIC DSA LIKE ARRAY AND STRING

Q1. System Design for Electric Charger app ?
Ans. 
System design for an electric charger app involves creating a user-friendly interface, integrating with payment systems, and ensuring efficient charging station management.
• Design a user-friendly interface for users to locate and reserve charging stations

• Integrate with payment systems for seamless transactions

• Implement efficient charging station management to monitor availability and maintenance

• Consider scalability for ...read more
Answered by AI
Add your answer
Q2. Design digram for that ?
Ans. 
Design diagram for a software developer role.
• Use UML diagrams to show class relationships and interactions

• Include components like classes, interfaces, relationships, and methods

• Consider using tools like Lucidchart or draw.io for creating the diagram
Answered by AI
Add your answer

Very basic aptitude questions along with few coding questions

Q1. A problem statement was given and we had to provide an optimal approach to design and handle that problem
Add your answer
Q2. Oops concepts, SQL queries
Add your answer

Arrays, basics. easy, some important topics in python and sql

Q1. SQL basics question learned in online or self
Add your answer
Q2. Joins, groupby, clause, projection, having
Add your answer

It was basic test. online.

2 questions on arrays. online.

The general topic. Be point to point

Q1. SQL and Python questions. online. screen sharing
Add your answer

Was taken on firefox Brower and was easy

Very basic questions like swap numbers etc

Q1. Basic questions on cpp
Add your answer
Q2. Opps concept like encapsulation etc
Add your answer
Q3. Write a code to reverse a string
Ans. 
Code to reverse a string
• Create an empty string to store the reversed string

• Loop through the original string from end to start

• Append each character to the empty string

• Return the reversed string
Answered by AI
Add your answer