Cardinality in Database Design — 1:1, 1:N, M:N

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Junction Table (Bridge Table) in Database Design

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Translating ER Diagram to SQL Tables

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Total vs Partial Participation

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Self-Referencing Relationships

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Attribute Types in ER Diagrams

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Primary Key in Databases

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Data & Persistence·Interview Q&A

Database Design Basics interview questions

50+ curated questions with the same answer shape every time: quick recap, deep dive, pitfalls, and follow-ups. Coverage includes er diagram basics, primary and foreign keys, normalization 1nf 2nf 3nf, transactions basics, and more.

50questions

7topics

32180difficulty

Open question 1 How to read this module

Suggested path

Read Database Design Basics from question 1 to 50

Topics follow a teaching order. Each answer ends with a clear Next question control so you can move forward without hunting the list.

1Start with question 1 — it sets up the rest of the module.
2Use Continue · Next question at the bottom of every page (and the arrows in the sticky bar when you scroll).
3Jump to any topic in the full catalog — every row is numbered in reading order (Q1–Q50).

Open question 1 Jump to Q1 in list Scroll to full catalog

About this page

Database design is the fresher-junior data foundation. This module is an elevation arc: it opens with ER diagrams (the modeling starting point), then keys (primary, foreign — the relational glue), then normalization (1NF-2NF-3NF — why we split tables). Transactions and ACID follow as the correctness tier, then the comparison tier — relational vs NoSQL and database comparisons — where a fresher learns when to choose what.

Reviewed by senior engineers·Updated for 2026·Free · No sign-up required

High-signal Database Design Basics questions

Top 5

Full catalog

Every question, in reading order

Topics are ordered for learning. Within each topic, rows are numbered 1–50 globally so you always know where you are. Collapse topics if you want a lighter view — use Expand all when you need the full list again.

Full catalog · reading order

Database Design Basics

Numbers 1–50 follow the order we recommend — click any row to open the full answer, or use the sticky Next link at the bottom of each page to go Q1 → Q50.

50 questions·7 topics

All topics expanded

FAQs about Database Design Basics interview prep

QHow many Database Design Basics interview questions are on this page?

This module bundles 50+ Database Design Basics interview questions, grouped by 7 topics. Every answer follows the same structure — one-liner summary, structured deep-dive, common pitfalls, and realistic follow-ups an interviewer might ask.

QIs this Database Design Basics content up to date for 2026?

Yes. Every answer is reviewed by senior engineers and updated for current best practices, version-specific APIs, and the scenario questions hiring managers are asking today.

QWhich difficulty level are these Database Design Basics questions?

The set spans all three levels — 32 easy, 18 medium, and 0 hard questions. Junior candidates should focus on the conceptual questions; senior candidates should drill the scenario and trade-off questions in every topic group.

QWhich question should I read first?

Start with question 1 in the ordered list below ("ER Diagram — Entity Relationship Diagram Basics") — it is the recommended entry point. Then use the Next question link at the bottom of each answer page to read straight through to Q50.

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