Lesson Notes By Weeks and Term - Senior Secondary School 1

CLASS: SSS 1

SUBJECT: DATA PROCESSING

TERM: 2^ND TERM

WEEK TEN                                                                                        DATE: ………………

TOPIC: FUNCTIONS OF OPERATING SYSTEM

Operating system performs the following functions:

1. Storage Management: Operating system also controls all the storage operations. This means how the data or files will be stored intro the computers and how the file will be accessed by the users etc. Creation of files, Directories. Basically, operating system performs the following :
2. It allows creation of files and directories.
3. It allows the reading of data from and writing of data to files and directories.

• It copies the contents of the files and directories from one place to another.

2. Process Management: The operating system also treats the process management. That is, it is the duty of operating system to handle processes given it by the users; the system own process as well.
3. Memory Management: It manages the sharing of internal memory among multiple applications. E.g Primary Memory : RAM , ROM ; Secondary Memory : Hard disc, CD, DVD etc.
4. Resources Management: Operating system manages all the resources of the computer system. Both the hardware ( Input, Output and Peripheral) and the software resources.
5. Security Management: these include: Virus management, Alert messages, passwords, Access protection etc.
6. Load and run application software: the operating system determines which application should run in what order and how much time should be allowed for each application before giving another application a turn.

EVALUATION

1. Define operating system.
2. State six functions of operating system.

GENERAL EVALUATION:

1. What is operating system?
2. List functions of operating system.
3. What do you understand by memory management?
4. Without operating system, what would happen to a computer?

READING ASSIGNMENT

Hiit @ Schools, Data Processing for Senior Secondary Education, pgs 31 – 32.

WEEKEND ASSIGNMENT

1. Which function of operating system deals with the creation of files and directories.       A. Memory management B.       Resources management       C. Storage management   D.       All of the above
2. Control of the right and access to file is ……… function of O.S.       A. Memory management   B.       Resources management         C. Storage management   D.       Process management
3. ……… handles processes in computer. A. DBMS         B. O.S   C.       Software   D.   Hardware
4. The …….. part of a computer is synchronized to perform tasks.   A.   Monitor   B.       Keyboard   C.   CPU         D.   System unit
5. The hardware part of computer has ………   A.       2   B.   3       C.   5   D.       7

THEORY

1. Explain the security management functions of operating system.
2. Mention four examples of secondary memory.