Relational Database Management System (RDBMS) Quiz

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Questions and Answers

What is the primary purpose of DQL commands?

To control access to data stored in a database

To get the schema relation based on the query passed (correct)

To manipulate/modify data presented in the database

To create and modify database objects

What is the relational model of database management system based on?

tuple calculus

set theory

relation algebra (correct)

predicate logic

What is an example of a DDL command?

INSERT

GRANT

SELECT

CREATE (correct)

What does NoSQL stand for?

Not only SQL Signup and view all the answers

Who invented the Relational Model in 1970?

Edgar F.Codd Signup and view all the answers

What is the main characteristic of NoSQL databases?

No strict following of ACID Signup and view all the answers

What is the primary purpose of SQL?

Data querying and management Signup and view all the answers

What is the primary advantage of In-Memory Database Management Systems (IMDBMS)?

Optimized work with disks (I/O) Signup and view all the answers

What is the standard for SQL described in?

ISO/IEC 9075-1:2016 Signup and view all the answers

What is DQL used for in SQL?

Data querying and retrieval Signup and view all the answers

What is the main difference between NoSQL databases and Relational Databases?

Data structures used Signup and view all the answers

What is the purpose of Data Control Language (DCL) commands?

To control access to data stored in a database Signup and view all the answers

What is the term for a Relational Database Management System?

RDBMS Signup and view all the answers

What is the purpose of Data Manipulation Language (DML) commands?

To manipulate/modify data presented in the database Signup and view all the answers

What is the primary function of a Relational Database Management System?

Data manipulation and querying Signup and view all the answers

What is SQL used for in programming?

Managing data in a Relational Database Management System Signup and view all the answers

What is the primary function of a Database Management System (DBMS)?

To handle, change, and retrieve data in a database Signup and view all the answers

What is a key component of a Database Management System (DBMS)?

Metadata Signup and view all the answers

What is the primary purpose of SQL in a DBMS?

To manipulate and retrieve data Signup and view all the answers

What type of database is designed to handle large amounts of unstructured or semi-structured data?

NoSQL Signup and view all the answers

What is the main difference between SMP and MPP architectures?

SMP is designed for small-scale databases, while MPP is designed for large-scale databases Signup and view all the answers

What is the primary purpose of a RAID system?

To enhance data redundancy and availability Signup and view all the answers

What is the definition of a database?

An organized collection of data Signup and view all the answers

What is the relationship between a DBMS and its components?

A DBMS is a software system that manipulates database components Signup and view all the answers

Study Notes

Relational Database Management System (RDBMS)

A database engine/system/product based on the Relational Model.
Invented by Edgar F. Codd in 1970.
Presents data to the user as relations (tables with rows and columns).
Provides relational operators to manipulate data in tabular form.

SQL

A standard computer language for Relational Database Management System.
Used for data manipulation.
ISO/IEC 9075-1:2016 describes the conceptual framework used in other parts of ISO/IEC 9075.
Consists of:
- DQL (Data Query Language) - used to perform queries on data within schema objects.
- DDL (Data Definition Language) - used to create and modify database objects.
- DCL (Data Control Language) - used to control access to data stored in a database.
- DML (Data Manipulation Language) - used to manipulate/modify data presented in the database.

NoSQL

A class of Database Management Systems that does not use SQL and does not follow the Relational Model.
Does not follow ACID rules.
Used for big data and real-time web applications.
Data structures used are different from those used in Relational Databases.

In-Memory Database Management System (IMDBMS)

A Database Management System that stores data on main memory.
Optimizes work with disks (I/O) by direct data manipulation and specialized architecture (CPU + memory).
Enables real-time data movement.

Database Management System (DBMS)

A software product/package/system created to handle/change/retrieve/etc data in a database.
Manipulates with data, data formats, metadata, and structures.
Defines rules how to work with data.
SQL is used in DBMS.