Database Concepts & Roles

What is the purpose of database design?

• To design graphics for the database

• To write code for database queries

• To create a physical model of the database

• To create a blueprint for organizing data in a database system.

What are the main responsibilities of a database administrator?

• Designing user interfaces

• Managing and maintaining databases, ensuring data security, optimizing database performance, troubleshooting issues, implementing backup and recovery plans

• Writing code for applications

• Managing social media accounts

Explain the importance of data security in databases.

• Data security in databases only matters for non-sensitive information.

• Data security in databases is important to protect sensitive information from unauthorized access, modification, or deletion, ensuring data integrity, confidentiality, availability, compliance, and user trust.

• Data security in databases can be easily managed by anyone without expertise.

• Data security in databases is irrelevant and unnecessary.

What is normalization in the context of database design?

• Normalization in database design is the process of organizing data in a database efficiently. This involves creating tables and establishing relationships between them to eliminate redundancy and dependency.

• Normalization is not necessary in database design.

• Normalization involves combining all data into a single table.

• Normalization is the process of adding redundancy to a database for better performance.

How does a database administrator ensure data integrity?

• By ignoring software updates and patches

• By implementing constraints, performing backups, validating input data, and enforcing security measures.

• By sharing the database password with unauthorized users

• By deleting random data entries

What are some common security measures to protect databases?

• Using weak access controls

• Implementing strong access controls, encrypting sensitive data, regularly updating software and patches, conducting security audits, monitoring database activity, and implementing firewalls.

• Ignoring software updates and patches

• Storing sensitive data in plain text

What is the role of indexing in database performance?

• Indexing in databases has no impact on performance

• Indexing in databases slows down performance by increasing the time it takes to retrieve data

• Indexing in databases causes data corruption

• Indexing in databases improves performance by allowing the system to quickly locate and retrieve specific rows of data without scanning the entire table.

Describe the difference between logical and physical database design.

• Logical database design is concerned with user interfaces, while physical database design is concerned with data modeling.

• Logical database design focuses on hardware aspects, while physical database design focuses on software aspects.

• Logical database design involves data manipulation, while physical database design involves data storage.

• Logical database design deals with the structure and organization of data, while physical database design deals with the implementation details and performance optimization.

What skills are important for a career in database administration?

• Proficiency in knitting

• Knowledge of database management systems, SQL, data modeling, data security, troubleshooting, and communication skills.

• Expertise in skydiving

• Knowledge of cooking techniques

Why is backup and recovery crucial for database management?

• Backup and recovery are unnecessary for database management

• Backup and recovery slow down database performance

• Backup and recovery increase the risk of data corruption

• Backup and recovery help maintain data integrity, minimize data loss, and enable restoration to a previous state.