Computer Knowledge

Database Management Systems

5,543 Questions

Database Management Systems (DBMS) form the core framework for data storage, retrieval, and security in modern software applications. Concepts such as the E-R model, backup planning, SQL integration, and big data architecture are essential for computer knowledge sections. This hub offers a comprehensive set of practice questions to master DBMS fundamentals and advanced database operations.

E-R Model ConceptsBackup and RecoverySQL Server UpgradesJDBC and ODBCBig Data CharacteristicsData VirtualizationOracle Database

Database Management Systems Questions

Multiple choice

Which of the following does not describe a data warehouse?

  1. Subject-oriented

  2. Integrated

  3. Time-variant

  4. Updateable

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Data warehouses are subject-oriented, integrated, time-variant, and NON-VOLATILE (not updateable). They are designed for read-only analytical processing, not transactional updates. 'Updateable' is the characteristic that does NOT describe a data warehouse, making option D the correct answer to this negative-question.

Multiple choice

A computer-based information system

  1. is a developing data

  2. is a system in which a computer is used to process data to get information

  3. performs complex mathematical calculations

  4. is one in which data is put into the computer for processing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A computer-based information system is fundamentally defined as a system where computers process data to generate meaningful information. This distinguishes it from mere data entry or calculation systems. The emphasis is on the transformation of raw data into organized, useful information through computer processing.

Multiple choice

Which of the following processes is responsible for signaling database writer at the checkpoints and updating all the datafiles and control files of the database to indicate the most recent checkpoints?

  1. Registration

  2. Lock manager server

  3. Database writer

  4. Checkpoint process

  5. Log writer
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This process is responsible for signaling database writer at the checkpoints and updating all the datafiles and control files of the database to indicate the most recent checkpoints.

Multiple choice

In which of the following components of the recovery manager environment is the client application spawn server sessions on the target database to do work of backup or recovery?

  1. Client

  2. Media management catalog

  3. Logical standby database

  4. RMAN client

  5. Duplicate database
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In this component of the recovery manager environment, the client application spawn server sessions on the target database to do work of backup or recovery.