Chapter 2 : Storage and retrieval Flashcards
1
Q
What is DBMS?
A
Database management system
2
Q
What is sequential access?
A
Data access in order and sequence
3
Q
What is Direct access?
A
Access data without go through orders and swquences
4
Q
4 Example of storage media medium?
A
- Hard disk
- Optical disk
- Removable catridge
- Magnetic tape
5
Q
What is encryption?
A
Process of encoding data and decoding data
6
Q
What is Asymmetric encryption?
A
Require a key to encode or decode
7
Q
What is Symmetric encryption?
A
Require same key to encryption and decryption.
8
Q
What is query?
A
Search of a database for records that meet a certain condition
9
Q
What is ‘ ? ‘ and ‘ * ‘ in search database search?
A
’ ? ‘ is one character or letter
‘ * ‘ is for many characters or letters
10
Q
What is SQL and what it contain?
A
Specialise language designed to search a database
