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 

Wish you Happy New Year 2026

 

Git & GitHub Interview Questions & Answers

 

Git & GitHub Interview Questions & Answers 🧑‍💻🌐  

1️⃣ What is Git?  

A: Git is a distributed version control system to track changes in source code during development.

2️⃣ What is GitHub?  

A: GitHub is a cloud-based platform that hosts Git repositories and supports collaboration, issue tracking, and CI/CD.

3️⃣ Git vs GitHub  

•  Git: Version control tool (local)  

•  GitHub: Hosting service for Git repositories (cloud-based)  

4️⃣ What is a Repository (Repo)?  

A: A storage space where your project’s files and history are saved.

5️⃣ Common Git Commands:  

•   git init  → Initialize a repo  

•   git clone  → Copy a repo  

•   git add  → Stage changes  

•   git commit  → Save changes  

•   git push  → Upload to remote  

•   git pull  → Fetch and merge from remote  

•   git status  → Check current state  

•   git log  → View commit history  

6️⃣ What is a Commit?  

A: A snapshot of your changes. Each commit has a unique ID (hash) and message.

7️⃣ What is a Branch?  

A: A separate line of development. The default branch is usually  main  or  master .

8️⃣ What is Merging?  

A: Combining changes from one branch into another.

9️⃣ What is a Pull Request (PR)?

A: A GitHub feature to propose changes, request reviews, and merge code into the main branch.

🔟 What is Forking?  

A: Creating a personal copy of someone else’s repo to make changes independently.

1️⃣1️⃣ What is .gitignore?  

A: A file that tells Git which files/folders to ignore (e.g., logs, temp files, env variables).

1️⃣2️⃣ What is Staging Area?  

A: A space where changes are held before committing.

1️⃣3️⃣ Difference between Merge and Rebase  

•  Merge: Keeps all history, creates a merge commit  

•  Rebase: Rewrites history, makes it linear  

1️⃣4️⃣ What is Git Workflow?  

A: A set of rules like Git Flow, GitHub Flow, etc., for how teams manage branches and releases.

1️⃣5️⃣ How to Resolve Merge Conflicts?  

A: Manually edit the conflicted files, mark resolved, then commit the changes.

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Happy Diwali 2025