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Database Interview Preparation

Ace every database interview question - your dream job awaits!

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Database Interview Preparation

4 Modules

Course Curriculum

4 Modules · 14 Chapters · 15 Topics · 161 Sub-topics

Introduction to Data and Information

1 Topics

Data and Information Concepts

6 Sub-topics

Understanding Data vs Information

Types of Data - Structured, Semi-Structured, Unstructured

Data Characteristics - Volume, Velocity, Variety, Veracity

Real-World Data Examples and Applications

Information Systems Overview

Data Lifecycle Management

Database Fundamentals

1 Topics

Database and DBMS Concepts

10 Sub-topics

What is a Database

Database vs File System - Key Differences

Database Management System (DBMS) Explained

DBMS Architecture Overview

Components of a DBMS

Database System Environment

Database Users and Roles

Database Administrator Responsibilities

DBMS Advantages Over File Systems

Types of Database Systems Overview

Data Models and Abstraction

1 Topics

Data Models and Architecture

10 Sub-topics

What is a Data Model

Three-Level Database Architecture - External, Conceptual, Internal

Data Independence - Physical and Logical

Schema vs Instance Concepts

Hierarchical Data Model

Network Data Model

Relational Data Model Introduction

Object-Oriented Data Model

Entity-Relationship Model Basics

Comparing Different Data Models

Relational Database (RDBMS) Concepts

1 Topics

Relational Model Fundamentals

15 Sub-topics

Introduction to Relational Model

Understanding Tables (Relations)

Rows (Tuples) and Records

Columns (Attributes) and Fields

Domain and Data Types Concept

Keys in Relational Databases - Overview

Primary Key Concept and Purpose

Foreign Key Concept and Relationships

Candidate Keys and Alternate Keys

Composite Keys

Super Key Concept

Relational Constraints Overview

Entity Integrity Constraint

Referential Integrity Constraint

Domain Constraint

Relationships and Cardinality

1 Topics

Database Relationships

10 Sub-topics

Understanding Database Relationships

One-to-One Relationship

One-to-Many Relationship

Many-to-Many Relationship

Cardinality in Relationships

Participation - Total and Partial

Recursive Relationships

Ternary Relationships

Weak Entities and Strong Entities

Relationship Constraints

Entity-Relationship (ER) Modeling

1 Topics

ER Modeling and Design

11 Sub-topics

Purpose of ER Modeling

ER Diagram Components

Entities and Entity Sets

Attributes - Simple, Composite, Derived, Multi-valued

Relationship Representation

ER Diagram Symbols and Notation

Creating ER Diagrams - Step by Step

Translating Requirements to ER Model

Advanced ER Concepts - Generalization

Specialization and Aggregation

ER Model Best Practices

Normalization Fundamentals

2 Topics

Database Normalization - Part 1

6 Sub-topics

What is Normalization

Purpose and Benefits of Normalization

Anomalies in Databases - Insert, Update, Delete

Normal Forms Overview

First Normal Form (1NF) - Rules and Requirements

Converting to 1NF - Examples

Database Normalization - Part 2

6 Sub-topics

Second Normal Form (2NF) - Rules and Requirements

Converting to 2NF - Examples

Third Normal Form (3NF) - Rules and Requirements

Converting to 3NF - Examples

Boyce-Codd Normal Form (BCNF)

Difference Between 3NF and BCNF

Transaction Management Concepts

1 Topics

Transactions and ACID Properties

10 Sub-topics

What is a Transaction

Transaction Properties (ACID) - Overview

Atomicity Explained

Consistency Explained

Isolation Explained

Durability Explained

Transaction States

Transaction Operations - Begin, Commit, Rollback

Why Transactions Are Critical

Transaction Boundaries

Concurrency Control Concepts

1 Topics

Concurrency Control Mechanisms

15 Sub-topics

Need for Concurrency Control

Problems Without Concurrency Control

Lost Update Problem

Uncommitted Dependency Problem

Inconsistent Analysis Problem

Phantom Read Problem

Concurrency Control Techniques Overview

Lock-Based Protocols

Two-Phase Locking Protocol

Deadlock in Databases

Deadlock Prevention Strategies

Deadlock Detection and Recovery

Timestamp-Based Protocols

Optimistic Concurrency Control

Multi-Version Concurrency Control (MVCC)

Indexing Fundamentals

1 Topics

Database Indexing Basics

11 Sub-topics

What is an Index

Why Indexing Matters

Index Structure Basics

Clustered vs Non-Clustered Index

Dense vs Sparse Index

Primary Index

Secondary Index

Multi-Level Indexing

Index Trade-offs - Space and Update Cost

When to Create Indexes

When Not to Index

Query Optimization Concepts

1 Topics

Query Optimization Techniques

14 Sub-topics

Query Optimization Importance

Optimization Strategies Overview

Query Execution Plans

Join Order Optimization

Selection and Projection Optimization

Access Path Selection

Index Selection in Queries

Join Algorithms Overview

Nested Loop Join

Sort-Merge Join

Hash Join

Query Optimization Statistics

Cardinality Estimation

Selectivity Concept

NoSQL Database Fundamentals

1 Topics

NoSQL Concepts and BASE Properties

11 Sub-topics

What is NoSQL

SQL vs NoSQL Comparison

Why NoSQL Emerged

NoSQL Characteristics

Schema Flexibility in NoSQL

NoSQL Scalability Approach

BASE Properties (Basically Available, Soft State, Eventually Consistent)

ACID vs BASE

When to Use NoSQL

When to Use SQL

NoSQL Database Types Overview

Distributed Database Concepts

1 Topics

Distributed Database Systems

14 Sub-topics

What is a Distributed Database

Distributed vs Centralized Database

Distributed Database Advantages

Distributed Database Challenges

Data Fragmentation - Horizontal and Vertical

Data Replication Concepts

Replication Strategies

Distributed Transaction Management

Two-Phase Commit Protocol

CAP Theorem Introduction

Consistency in Distributed Systems

Availability in Distributed Systems

Partition Tolerance

CAP Trade-offs

Database Selection and Design Decisions

1 Topics

Database Technology Selection

12 Sub-topics

Database Selection Criteria

Analyzing Application Requirements

Data Model Considerations

Scalability Requirements Analysis

Consistency Requirements

Availability Requirements

Performance Requirements

Cost Considerations

Polyglot Persistence Concept

Hybrid Database Architectures

Migration Considerations

Future-Proofing Database Decisions

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Database Interview Preparation

Certificate of Completion

Course Curriculum

Student Reviews

Frequently Asked Questions

Start Your Journey Today

Database Interview Preparation

Certificate of Completion

Course Curriculum

Student Reviews

Frequently Asked Questions

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