Interview Question 1 - Explain about data and how do you store data?

Q1- Explain about data and how do you store data?

What is Data?

Data is a collection of raw facts, figures, or observations that can be processed to produce meaningful information. By itself, data may not have much meaning, but when organized or analyzed, it becomes useful.

Examples of Data

Numbers: 25, 1000, 3.14

Text: "Anurag", "Noida"

Images: Photos, scanned documents

Audio/Video: Voice recordings, videos

Dates: 07-01-2026

For example:

Data: 98, 85, 76

Information: “The student’s average score is 86.”

Types of Data

1. Structured Data

Data organized in a fixed format (rows and columns).

Examples: Tables in databases, Excel sheets

Easy to search and analyze

Example:

| EmployeeID | Name | Salary |

2. Semi‑Structured Data

Data that has some structure, but not in tabular form.

Examples: JSON, XML, CSV files

Common in web applications and APIs

Example (JSON):

JSON{  "name": "Anurag",  "role": "Global Senior Database Architect"}

3. Unstructured Data

Data with no predefined format.

Examples: Emails, videos, images, PDFs, social media posts

Harder to analyze without special tools