Operating System

Question 1

The Order of the Layers of Software

Answer 1

• User
• Application
• OS
• Hardware

Question 2

The OS manages resources, which includes

Answer 2

• Processor Scheduling (order processes will be executed)
• Handling Interrupts (dealing with requests which interrupt processor)
• Memory management (records how memory is divided so that memory can be allocated)
• Secondary Storage Management (tracks where files and programs are stored)
• IO Devices (efficient communication)
• Hides complexities of the hardware

Question 3

Define User Interface

Answer 3

how the user interacts with the computer and receives processed information

Question 4

The OS handles Security by

Answer 4

Ensuring resources are protected from unauthorised access (passwords)

Question 5

What is in Von Neumann Architecture

Answer 5

• Processor
• Memory
• I/O
• Secondary Storage

Question 6

Define the VN buses

Answer 6

• Address Bus: Identify location
• Data Bus: transfer contents

-Control Bus: Synchronise/control operations

Question 7

What is in Harvard Architecture:

Answer 7

• Separate Memories (instructions/data)

- Separate Buses

Question 8

VN vs Harvard

Answer 8

Harvard:

• Simultaneous access
• Reduces waiting time, increases performance
• Each memory is adaptable
• Embedded systems

VN:

• Same memory, exploitable
• More flexible use of main memory
• General Purpose