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INSY 3304 Midterm Exam With Questions And 100% Correct Answers
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INSY 3304 Midterm Exam With Questions And 100%Correct Answers
Components of DB System - ANSWER 1)Hardware (comp, storage, printers)
2)Software (OS, DBMS software, apps)
3)People (all users, admin, end users, programmers)
4)Procedures (rules, enforce standards)
5)Data (collection of facts stored)
Functions of DBMS - ANSWER 1) Data Dictionary management (stores definition of data
elements and their relationships)
2) Data storage management (creates/ manages complex structures required for data
storage)
3)Data transformation and presentation (conforms entered data for user)
4) Security management (access, items)
5)Multi user access control (ensure people can access concurrently)
6)Backup and recovery management (backup and data recovery to ensure safety/
integrity)
7)Data integrity management (DBMS promotes and enforces integrity rules, minimizing
redundancy)
8)database access languages and app programming interfaces (data access through
query language)
9)Database communication interfaces (accepts user requests via multiple, different
network environments)
Different types of database systems - ANSWER -single user
-desktop database
-multi user database
, -workgroup database
-enterprise database
-Centralized database
-distributed database
-cloud database
-general purpose database
-discipline specific database
single user D - ANSWER one user at a time
desktop database - ANSWER single user on personal comp
multi user D - ANSWER multiple users at a time
work group - ANSWER when multiuser supports small number of users (<50)
enterprise D - ANSWER when database used by entire org and supports >50 users
centralized D - ANSWER supports data located at single site
distributed D - ANSWER database that supports data across several sites
cloud D - ANSWER created and maintained useing cloud services
general purpose D - ANSWER contains a wide variety of data used in multiple disciplines
discipline specific D - ANSWER contain data focused on subject specific area
Database model types - ANSWER Hierarchical
Network
Relational
Entity relationship
object oriented
ERDM
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