Database Administration: Master Database Management for IT Professionals

Question 1

Which task is not a core responsibility of a database administrator?

Accepted Answer

Developing new database applications

Answer

Managing user accounts and access privileges

Answer

Backing up and restoring data

Answer

Monitoring database performance

Question 2

Which of the following is a disadvantage of database normalization?

Accepted Answer

Increased database complexity

Answer

Reduced data redundancy

Answer

Improved data integrity

Question 3

Which of the following is NOT a primary responsibility of a Database Administrator (DBA)?

Accepted Answer

Developing application code

Answer

Performing regular backups

Answer

Monitoring database performance

Answer

Designing the database schema

Question 4

Which database model organizes data in a hierarchical structure, resembling an inverted tree?

Accepted Answer

Hierarchical model

Answer

Network model

Answer

Object-oriented model

Answer

Relational model

Question 5

What is the primary purpose of defining a primary key in a database table?

Accepted Answer

To uniquely identify and differentiate each record

Answer

To store additional information about records

Answer

To sort records in a specific order

Answer

To establish relationships between tables

Question 6

Which of the following benefits is commonly associated with the use of indexes in a database?

Accepted Answer

Enhanced query speed and performance

Answer

Reduced data redundancy

Answer

Increased database security

Answer

Larger database size

Question 7

What is the term used to describe the process of dividing a large database into smaller, more manageable components?

Accepted Answer

Database partitioning

Answer

Database replication

Answer

Database normalization

Question 8

Which backup method involves creating a copy of the database while it is offline?

Accepted Answer

Cold backup

Answer

Incremental backup

Answer

Hot backup

Question 9

What is the primary function of a transaction log in a database management system?

Accepted Answer

To record all database modifications and ensure data integrity

Answer

To back up the database in case of a system failure

Answer

To improve database performance

Answer

To store temporary data during database operations

Question 10

Which of the following is a popular open-source database management system known for its high performance capabilities?

Accepted Answer

PostgreSQL

Answer

Oracle Database

Answer

Microsoft SQL Server

Question 11

What is the fundamental objective of database normalization?

Accepted Answer

To eliminate data duplication and maintain data consistency

Answer

To simplify database design

Answer

To improve data security

Answer

To enhance database performance

Question 12

When designing a database schema, which factor should be given the highest priority?

Accepted Answer

Data integrity and adherence to data quality standards

Answer

Cost of implementation

Answer

User interface design considerations

Answer

Database size and storage capacity

Question 13

What is the primary function of a database management system (DBMS)?

Accepted Answer

To manage and control access to data stored in a database.

Answer

To analyze and interpret data stored in a database.

Answer

To write code for database applications.

Answer

To design user interfaces for database interactions.

Question 14

Which of the following is NOT a typical responsibility of a database administrator (DBA)?

Accepted Answer

Developing marketing strategies for database-driven products.

Answer

Ensuring data security and integrity.

Answer

Optimizing database performance.

Answer

Managing database backups and recovery.

Question 15

To maintain data consistency and prevent data loss during database updates, which mechanism is commonly used?

Accepted Answer

Transactions and locking.

Answer

Data compression.

Answer

Data encryption.

Answer

Data mirroring.

Question 16

What is the main purpose of creating a database backup?

Accepted Answer

To restore data in case of data loss or corruption.

Answer

To optimize database performance.

Answer

To compress data for efficient storage.

Answer

To create a copy of the database for analysis.

Question 17

Which type of database backup creates a complete copy of the database at a specific point in time?

Accepted Answer

Full backup

Answer

Log backup

Answer

Incremental backup

Answer

Differential backup

Question 18

To establish a secure connection to a remote database server, which protocol is commonly used?

Accepted Answer

Secure Shell (SSH)

Answer

Hypertext Transfer Protocol (HTTP)

Answer

File Transfer Protocol (FTP)

Answer

Simple Mail Transfer Protocol (SMTP)

Question 19

Which database performance optimization technique involves adjusting database configurations and settings to improve query execution speed?

Accepted Answer

Tuning

Answer

Replication

Answer

Backup and recovery

Answer

Normalization

Question 20

What is the primary function of a database index?

Accepted Answer

To speed up data retrieval by providing a quick lookup mechanism.

Answer

To ensure data integrity and consistency.

Answer

To organize data in a specific order.

Answer

To compress data for efficient storage.

Question 21

Which of the following is NOT a common type of database used in modern applications?

Accepted Answer

Hierarchical database

Answer

NoSQL database

Answer

Cloud database

Answer

Relational database

Question 22

Which of the following is NOT a primary responsibility of a database administrator?

Accepted Answer

Developing software applications

Answer

Managing database security

Answer

Optimizing database performance

Question 23

Which database management system (DBMS) feature allows for the creation of multiple logical databases on a single physical database?

Accepted Answer

Schema

Answer

Table

Answer

Instance

Answer

View

Question 24

Which of the following is a benefit of database normalization?

Accepted Answer

Reduced data redundancy

Answer

Complex query structures

Answer

Increased database size

Answer

Data inconsistencies

Question 25

Which type of database backup involves copying the entire database, including data and structure?

Accepted Answer

Full backup

Answer

Log backup

Answer

Differential backup

Answer

Incremental backup

Question 26

Which of the following commands is used to create a new table in SQL?

Accepted Answer

CREATE TABLE

Answer

INSERT INTO

Answer

SELECT * FROM

Answer

UPDATE

Question 27

Which database performance tuning technique involves optimizing the physical layout of data on disk?

Accepted Answer

Indexing

Answer

Query optimization

Answer

Database normalization

Answer

Hardware upgrades

Question 28

Which of the following is a common cause of database deadlocks?

Accepted Answer

Concurrent access to the same data

Answer

Hardware failures

Answer

Network latency

Answer

Insufficient memory

Question 29

Which type of database transaction isolation level ensures that no uncommitted changes are visible to other transactions?

Accepted Answer

Serializable

Answer

Repeatable read

Answer

Read uncommitted

Answer

Read committed

Question 30

Which of the following database security measures involves encrypting data at rest?

Accepted Answer

Encryption

Answer

Authentication

Answer

Authorization

Answer

Auditing

Question 31

Which of the following tools is commonly used for database monitoring and performance analysis?

Accepted Answer

Database performance monitor

Answer

Spreadsheet application

Answer

Web browser

Answer

Text editor

Question 32

What is the primary function of a database management system (DBMS)?

Accepted Answer

To manage and control access to a database.

Answer

To visualize and present data from a database.

Answer

To analyze and interpret data stored in a database.

Answer

To develop and design database applications.

Question 33

You need to ensure that data changes made by one user are immediately visible to others. Which database isolation level would you choose?

Accepted Answer

Serializable

Answer

Repeatable Read

Answer

Read Committed

Question 34

What is the purpose of a database backup?

Accepted Answer

To restore data in case of data loss or corruption.

Answer

To increase database security.

Answer

To improve database performance.

Question 35

Which database recovery technique involves using a log file to roll back transactions that were incomplete at the time of failure?

Accepted Answer

Rollback Recovery

Answer

Incremental Recovery

Answer

Forward Recovery

Answer

Cold Recovery

Question 36

What is a data warehouse?

Accepted Answer

A central repository of data from multiple sources, designed for analytical reporting.

Answer

A system for managing user authentication and access control.

Answer

A temporary storage area for data being processed.

Question 37

Which of the following is NOT a common database security measure?

Accepted Answer

Data encryption is not a security measure.

Answer

Data encryption

Answer

Access control lists (ACLs)

Answer

Auditing and logging

Question 38

What is the main purpose of a database index?

Accepted Answer

To speed up data retrieval by creating a searchable structure.

Answer

To compress data and save storage space.

Answer

To prevent data corruption.

Question 39

Which database concept refers to the ability of multiple users to access and modify data simultaneously without interfering with each other's operations?

Accepted Answer

Concurrency Control

Answer

Data Integrity

Answer

Database Security

Answer

Data Recovery

Question 40

Which of the following is NOT a primary responsibility of a database administrator?

Accepted Answer

Developing new database applications.

Answer

Ensuring data integrity and security.

Answer

Managing user access and permissions.

Answer

Optimizing database performance.

Question 41

A database administrator uses a normalization process to:

Accepted Answer

Reduce data redundancy and improve data integrity.

Answer

Increase the size of the database.

Answer

Create new database tables.

Answer

Improve the speed of data retrieval.

Question 42

Which type of database backup involves creating a complete copy of the database at a specific point in time?

Accepted Answer

Full backup

Answer

Differential backup

Answer

Transaction log backup

Answer

Incremental backup

Question 43

What is the primary purpose of a database index?

Accepted Answer

Speed up data retrieval by creating a sorted list of data values.

Answer

Ensure data security by encrypting database tables.

Answer

Reduce the size of the database by removing redundant data.

Question 44

Which of the following is NOT a common database security measure?

Accepted Answer

Using a single, strong password for all database accounts.

Answer

Implementing access control lists (ACLs).

Answer

Regularly auditing database activities.

Question 45

A database administrator uses a database tuning tool to:

Accepted Answer

Optimize database performance by adjusting settings and configurations.

Answer

Create new database tables and relationships.

Answer

Back up and restore the database.

Question 46

What is a common method for ensuring data consistency across multiple databases?

Accepted Answer

Replication

Answer

Normalization

Answer

Transaction logging

Answer

Indexing

Question 47

Which type of database management system (DBMS) is typically used for managing large amounts of structured data?

Accepted Answer

Relational DBMS

Answer

Hierarchical DBMS

Answer

NoSQL DBMS

Answer

Object-oriented DBMS

Question 48

What is a data warehouse?

Accepted Answer

A central repository for storing and analyzing large amounts of historical data from multiple sources.

Answer

A database used for real-time transactional processing.

Question 49

A database administrator uses a disaster recovery plan to:

Accepted Answer

Restore database operations in the event of a system failure or disaster.

Answer

Design and implement database security measures.

Answer

Optimize database performance by tuning settings.