BCS 1333 OS TEST 1 Preparation

1. What is Operating Systems? (3 marks)
   

   
   

2. Why do computer need Operating Systems? (3 marks)
   

   
   

3. Give 4 examples of OS available on the market. (4 marks)
   

   
   

4. Draw the layers of a computer system (complete a given figure) ( 4 marks)
   

   
   

   <<will be update later>>
   

5. Briefly explain the process of booting. (5 marks)
   

   
   

   
   

6. What is the purpose of system calls? (2marks)
   

   
   

7. Give five (5) types of system calls.
   

(5 marks)

1. Explain three (3) types of process states.
   

   (6 marks)
   

2. Give five (5) services provided be OS for process management.
   

   (5 marks)
   

   
   

3. Why we cannot store the programs and data in main memory permanently?
   

   (4 marks)