What information is not typically stored in a Process Control Block (PCB)?

The graphical user interface layout

Which of the following would cause disk thrashing?

frequent accessing of pages not in main memory

Which of the following is a description of a page fault?

it occurs when a program/process accesses a page not yet in memory

What is the main role of the bootstrap program when a computer is first switched on?

It loads part of the operating system into RAM

What is a key characteristic of a preemptive multitasking operating system?

A process can be interrupted and rescheduled after a time quantum

What is the main role of the kernel in an operating system?

It handles communication between hardware, software, and memory

What is one of the key responsibilities of low-level scheduling in an operating system?

Deciding which process in the ready state gets CPU time next

Which of the following page replacement algorithms suffer from Belady’s anomaly?

First In First Out (FIFO) page replacement

Why do tablets and mobile phones have a faster start-up compared to desktop computers?

They use flash memory which provides faster access

Which of the following is a description of virtual memory?

it gives the illusion of a larger main memory

Which of the following pages will the optimal page replacement algorithm

the page that will not be used for the longest time in the future

What is the primary advantage of using Direct Memory Access (DMA) in a computer system?

It lets the CPU perform other tasks while I/O data transfer takes place

Increasing the RAM on a computer will usually increase its performance. Which of the following is the reason for this?

there will be fewer page faults occurring

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A2-16.1

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Questions 15

Answers

1
What information is not typically stored in a Process Control Block (PCB)?
The graphical user interface layout
Process privileges
Process state (running, ready, blocked)
Register values (PC, MAR, MDR, ACC)
2
Which of the following would cause disk thrashing?
when a page fault occurs
frequent accessing of pages not in main memory
when the processes on a system are in the running state
when a number of interrupts occur
3
Which of the following is a description of a page fault?
it occurs when a program/process accesses a page available in memory
it occurs when a program/process accesses a page not yet in memory
it is an error condition when reading a page
it is a reference to a page belonging to a different running program
4
What is the main role of the bootstrap program when a computer is first switched on?
It loads the BIOS from the flash memory
It loads part of the operating system into RAM
It installs applications from the internet
It updates the flash memory
5
What is a key characteristic of a preemptive multitasking operating system?
A process can be interrupted and rescheduled after a time quantum
A process must complete its execution before another starts
A process can only run if all other processes are completed
A process runs until it voluntarily gives up control
6
What is the main role of the kernel in an operating system?
It updates applications automatically
It handles communication between hardware, software, and memory
It connects the computer to the internet
It manages user passwords and profiles
7
What is one of the key responsibilities of low-level scheduling in an operating system?
Deciding which process in the ready state gets CPU time next
Allocating IP addresses to networked devices
Managing the installation of new applications
Monitoring power usage of hardware components
8
Which of the following page replacement algorithms suffer from Belady’s anomaly?
First In First Out (FIFO) page replacement
Least Recently used (LRU) Page Replacement
Clock Page Replacement
Optimal Page Replacement which is correct answer
9
Why do tablets and mobile phones have a faster start-up compared to desktop computers?
They use flash memory which provides faster access
They do not have an operating system
They store everything in RAM
They skip the BIOS process
10
Which of the following is a description of virtual memory?
a larger secondary memory
it gives the illusion of a larger main memory
a larger main memory (RAM)
system that uses host and guest operating systems
11
Which of the following pages will the optimal page replacement algorithm
the page that has been used the least number of times
the page that has been used the most number of times
the page that will not be used for the longest time in the future
the page that has not been used for the longest time in the past
12
Which of the following is the main entry in a page table?
the size of the page
the access rights to the page
the virtual page number (VN)
the page frame number
13
What is the primary advantage of using Direct Memory Access (DMA) in a computer system?
It stores data permanently during I/O operations
It speeds up the CPU clock speed
It lets the CPU perform other tasks while I/O data transfer takes place
It allows hardware to transfer data to memory without using any resources
14
Increasing the RAM on a computer will usually increase its performance. Which of the following is the reason for this?
it will increase the size of virtual memory
larger RAM results in fewer interrupts occurring
there will be fewer segmentation faults
there will be fewer page faults occurring
15
In this algorithm a fixed time slice is given to each process; this is known as a quantum.
First Come First Served (FCFS)
Round Robin
Shortest Job First (SJF)
Shortest Remaining Time First (SRTF)

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