1
a. Explain the following terms: (10 Marks)
i. Computer operating system
ii. Device driver
iii. Process control block
iv. Critical resource
v. Context switch
b. There are two techniques by which a program executing in user mode can request the kernel’s services.
List these techniques. (2 Marks)
c. In your own words, list any four goals of operating systems. (4 Marks)
d. There are several conditions that might necessitate for the termination of a certain process. List any five
reasons why a process might terminate. (5 Marks)
e. Explain the following types of operating systems. (9 Marks)
i. Real-time operating system
ii. Multi-user operating system
iii. Distributed operating system

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