OS IS PART 3

Question 1

FILE MANAGMENT

Answer 1

• Ensures files are available and protected from unauthorized access

Question 2

Database Management Systems (DBMS)

Answer 2

Group of programs used as an interface between a database and its users and other application
programs

Question 3

PROVIDING A USER VIEW

Answer 3

• Schema - Describes the entire database, can be in the database or a separate file
• DBMS can reference a schema to locate data in relation to other data

Question 4

CREATING AND MODYFING THE DATABASE

Answer 4

• Data definition language (DDL) - Defines and describes data and relationships in a database
  schema
• Data dictionary - Detailed description of all the data used in the database

Question 5

STORING AND RETREVING DATA

Answer 5

• Application programs request data through the DBMS
• Concurrency control - Prevents potential data conflicts