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100 Data Modelling Interview Questions To Prepare For In 2025

ProjectPro

A primary key is a column or set of columns in a relational database management system table that uniquely identifies each record. For instance, a social security number, a bank account number, and a bank routing number are all examples of a primary key. List a few benefits of using surrogate keys in relational databases.

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Sqoop vs. Flume Battle of the Hadoop ETL tools

ProjectPro

The major difference between Sqoop and Flume is that Sqoop is used for loading data from relational databases into HDFS while Flume is used to capture a stream of moving data. The data sources can refer to databases, machine data, web APIs, relational databases, flat files, log files, and RSS (RDF Site Summary) feeds, to name a few.

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How To Choose Right AWS Databases for Your Needs

ProjectPro

They include relational databases like Amazon RDS for MySQL, PostgreSQL, and Oracle and NoSQL databases like Amazon DynamoDB. Types of AWS Databases AWS provides various database services, such as Relational Databases Non-Relational or NoSQL Databases Other Cloud Databases ( In-memory and Graph Databases).

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A Beginner’s Guide to Graph Databases

ProjectPro

FAQs on Graph Databases What is a Graph Database? A graph database is a specialized database designed to efficiently store and query interconnected data. The Key Components of a Graph Database include - Nodes represent entities or objects within the data, such as a person, a place, or a product.

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Top Hadoop Projects and Spark Projects for Beginners 2025

ProjectPro

As we step into the latter half of the present decade, we can’t help but notice the way Big Data has entered all crucial technology-powered domains such as banking and financial services, telecom, manufacturing, information technology, operations, and logistics.

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Every Company is Becoming a Software Company

Confluent

To make clear what I mean, let’s look at an example: the loan approval process from a consumer bank. Traditionally this was a multi-week process where individuals such as a bank agent, mortgage officer, and credit officer each collaborated in a manual process. Here, the bank loan business division has essentially become software.

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100+ Big Data Interview Questions and Answers 2025

ProjectPro

Big data operations require specialized tools and techniques since a relational database cannot manage such a large amount of data. This database provides more flexible data storage and retrieval than typical relational databases. SQL MySQL SQL is a relational database. SQL databases scale vertically.