What is the role of the host OS in virtualization?

It allows guest OSes to run while managing hardware resources

Which of the following best describes a LAN?

A network confined to a small location like a home or office.

The core program of the OS running at all times.

Which feature is shared in a Network Operating System (NOS)?

It manages and facilitates resource sharing across a network.

What is a key difference between emulation and virtualization?

Emulation allows different CPU architectures to run software

How can timers be used to compute the current time?

By setting a timer and updating time when awakened by interrupts.

Which statement best describes a system call?

A request from a user program to the OS for privileged operations.

What is the main challenge in writing an operating system for a real-time environment?

Keeping the OS within strict time constraints to avoid system failures.

Why are caches useful?

They help devices transfer data at different speeds.

How does virtualization enable cloud computing?

It allows multiple virtual machines to share physical hardware efficiently.

Which statement about mobile computers in networks is true?

They connect via wireless networks.

What best describes a distributed computing system?

A group of connected but independent systems working together.

What is the purpose of the bootstrap program?

To boot up the system and load the OS kernel.

Which of the following statements about multiprogramming is true?

It improves efficiency by job scheduling when the CPU is idle.

Which scenario would most likely require a WAN?

A university campus spread across different cities.

How does the peer-to-peer (P2P) model differ from the client-server model?

Client-server has fixed roles; P2P nodes can be both client and server.

Which of the following statements about protection vs. security is incorrect?

Protection and security are interchangeable concepts in an OS.

What is a fundamental component of cloud computing environments?

Traditional OSes, VMMs, and cloud management tools.

What is the primary role of Operating Systems?

To manage hardware and software resources

What is one major security risk of protecting the OS when placed in a separate memory partition that cannot be modified?

Passwords and access controls could be exposed.

What is the role of TCP/IP in distributed computing?

It allows systems to communicate over networks.

Should the operating system include applications like web browsers and mail programs?

NO | Applications are separate from the OS and may cause security issues., YES | Embedding them in the OS improves performance.

Which of the following is true about real-time processing?

Processing must be completed within a defined time constraint

What role does the load balancer play in this cloud architecture?

It distributes incoming requests across multiple resources

What role do firewalls play in cloud computing?

They secure network access by filtering traffic.

Why can't a cache always be as large as the device it caches (i.e., disk)?

Cache is volatile and loses data when power is off.

Why are firewalls essential in networks?

They protect networks from internet-based attacks

Why are real-time embedded systems considered the most prevalent form of computers?

They are special-purpose systems found in everyday devices

What is the primary function of portals in a computing environment?

To provide secure external access to internal systems.

Which of the following is true about memory storage hierarchy?

Main memory is volatile, but caching helps improve access speed.

Which of the following best describes virtualization?

Running an OS natively compiled for the CPU with guest OS support

What is the key characteristic of a real-time operating system (RTOS)?

It ensures processing must be done within strict time limits

What best describes network computers in a regular setup?

Web terminals that rely on network resources

Why do operating systems use User IDs (UIDs) and Group IDs (GIDs)?

To differentiate access rights between individual users and groups.

Which of the following instructions are privileged?

Access I/O device., Set value of timer., Modify entries in the device-status table., Clear memory., Turn off interrupts.

Why is emulation generally slower than virtualization?

It translates instructions between different architectures

How does a distributed system create the illusion of a single system?

By using network protocols and operating systems to integrate resources.

Which scenario best illustrates multiprogramming, not time-sharing?

A batch system executing jobs consecutively with no user interaction.

When is it acceptable for an operating system to "waste" resources?

When optimizing user interaction, like using a GUI.

What are the four main components of a computer system?

Hardware, Applications, Operating System, Users.

Some CPUs provide more than just user mode and kernel mode. What is one advantage of having multiple modes?

It improves security by adding access levels.

How could multiple CPU modes help manage device drivers like USB devices?

USB drivers can run in a special mode without using kernel mode.

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Operating Systems | Chapter 1 Review

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Answers

1
What is the role of the host OS in virtualization?
It allows guest OSes to run while managing hardware resources
It translates CPU instructions between different architectures
It restricts access to system resources for security
It eliminates the need for a Virtual Machine Manager
2
Which cloud type includes both private and public cloud components?
Mega Gay Cloud
Public cloud
Private cloud
Hybrid cloud
3
Which of the following best describes a LAN?
A network that covers a city-wide area.
A personal device network using Bluetooth.
A network confined to a small location like a home or office.
A network that connects different continents.
4
What is the kernel?
A program that runs only during boot-up.
A type of system software used for graphics processing.
The core program of the OS running at all times.
A secondary storage management tool.
5
Which feature is shared in a Network Operating System (NOS)?
It replaces local operating systems on all computers.
It limits communication between different systems.
It manages and facilitates resource sharing across a network.
It controls only standalone computers.
6
What is a key difference between emulation and virtualization?
Emulation runs only native OS applications
Virtualization does not support guest operating systems
Virtualization is slower than emulation
Emulation allows different CPU architectures to run software
7
How can timers be used to compute the current time?
By measuring the time between keypresses.
By using the CPU clock to directly track time.
By setting a timer and updating time when awakened by interrupts.
By running a loop to check the time continuously.
8
Which statement best describes a system call?
A request from a user program to the OS for privileged operations.
A mechanism used only for handling device drivers.
A software-generated interrupt caused by an error or request.
A direct way for user programs to execute kernel functions.
9
What is the main challenge in writing an operating system for a real-time environment?
Reducing memory usage in applications.
Keeping the OS within strict time constraints to avoid system failures.
Ensuring the OS supports multiple users.
Optimizing battery life for mobile devices.
10
Why are caches useful?
They eliminate the need for primary memory.
They help devices transfer data at different speeds.
They slow down memory to match CPU speed.
They replace secondary storage completely.
11
How does virtualization enable cloud computing?
It eliminates the requirement for networking in cloud environments.
It allows multiple virtual machines to share physical hardware efficiently.
It only works with software applications, not operating systems.
It removes the need for physical data centers.
12
Which statement about mobile computers in networks is true?
They connect via wireless networks.
They do not rely on network access.
They connect via wired connections only
They require direct portal access for internet use.
13
What best describes a distributed computing system?
A single powerful computer handling all tasks centrally.
A cloud service replacing all physical machines.
A local network where all systems run the same software.
A group of connected but independent systems working together.
14
What is the purpose of the bootstrap program?
To allocate CPU resources.
To boot up the system and load the OS kernel.
To enable device communication.
To manage application software.
15
Which of the following statements about multiprogramming is true?
It allows multiple programs to run simultaneously without scheduling.
It ensures that each process gets an equal amount of CPU time.
It improves efficiency by job scheduling when the CPU is idle.
It only works on single-processor systems.
16
Which scenario would most likely require a WAN?
A corporate office with multiple floors in one building
A small business with Wi-Fi in a single location.
A university campus spread across different cities.
A smart home with interconnected IoT devices.
17
How does the peer-to-peer (P2P) model differ from the client-server model?
Client-server does not store any data.
Client-server has fixed roles; P2P nodes can be both client and server.
P2P is faster than client-server.
P2P always requires internet access.
18
Which of the following statements about protection vs. security is incorrect?
Protection and security are interchangeable concepts in an OS.
Protection ensures controlled access to system resources.
Access control policies are part of protection mechanisms.
Security focuses on preventing unauthorized access and attacks.
19
What is a fundamental component of cloud computing environments?
Traditional OSes, VMMs, and cloud management tools.
Only physical servers without virtualization.
Standalone applications without online integration.
LAN-based networking without internet access.
20
What is the primary role of Operating Systems?
To directly execute user programs.
To prevent all user errors.
To replace computer hardware.
To manage hardware and software resources
21
What is one major security risk of protecting the OS when placed in a separate memory partition that cannot be modified?
The OS cannot interact with applications.
It prevents users from accessing any data.
Passwords and access controls could be exposed.
It makes the OS faster but uses more memory.
22
What is the role of TCP/IP in distributed computing?
It merges multiple computers into a single machine.
It allows systems to communicate over networks.
It eliminates the need for network operating systems.
It restricts communication to local devices only.
23
How does the difference between kernel mode and user mode provide security?
It limits user mode capabilities, protecting critical system resources.
It prevents applications from modifying hardware directly.
All of the above.
It ensures only privileged instructions can execute in kernel mode.
24
Should the operating system include applications like web browsers and mail programs?
NO | Applications are separate from the OS and may cause security issues.
YES | Embedding them in the OS improves performance.
YES | It reduces user workload.
NO | It slows down hardware performance.
25
Which of the following is true about real-time processing?
Processing must be completed within a defined time constraint
A system can delay execution as long as the task eventually complete
It allows flexible task completion times depending on load
The system prioritizes background tasks over real-time operations
26
Which cloud computing component helps distribute traffic across applications?
Load balancer.
Virtual Machine Monitor (VMM)
Storage server
Firewall
27
What role does the load balancer play in this cloud architecture?
It provides internet access to cloud services
It distributes incoming requests across multiple resources
It directly manages virtual machines and storage
It filters incoming traffic for security purposes
28
What role do firewalls play in cloud computing?
They store virtual machine backups
They improve internet speed in cloud environments
They secure network access by filtering traffic.
They eliminate the need for encryption
29
Why can't a cache always be as large as the device it caches (i.e., disk)?
The OS cannot manage a cache larger than main memory
Large caches cause significant slowdowns in data retrieval.
Cache is volatile and loses data when power is off.
Cache cannot store data as efficiently as secondary storage.
30
How do device controllers notify the CPU that an operation is complete?
By using a device-status table.
By sending a signal through system calls.
By modifying the OS kernel.
By causing an interrupt.
31
Why are firewalls essential in networks?
They function as web portals for secure login
They allow unrestricted access to internal data
hey enhance wireless speed and reduce lag
They protect networks from internet-based attacks
32
Why are real-time embedded systems considered the most prevalent form of computers?
They handle real-time tasks but do not require an operating system
They are used in general-purpose computing like desktops and laptops
They only exist in high-performance computing environments
They are special-purpose systems found in everyday devices
33
What is the primary function of portals in a computing environment?
To restrict access to mobile computers.
To act as a replacement for network computers.
To isolate web terminals from network access.
To provide secure external access to internal systems.
34
Which of the following is true about memory storage hierarchy?
Secondary storage is always slower but more expensive than main memory.
Cache memory is part of secondary storage and speeds up disk access.
Main memory is volatile, but caching helps improve access speed.
Disk storage and main memory serve the same purpose in modern OS.
35
Which of the following best describes virtualization?
Running a single OS with no guest instances
Simulating hardware to run non-native applications
Running an OS natively compiled for the CPU with guest OS support
Interpreting high-level programming languages
36
What is the key characteristic of a real-time operating system (RTOS)?
It ensures processing must be done within strict time limits
It executes tasks only when enough resources are available
It operates only in embedded systems with no OS dependencies
It prioritizes maximum processing power over timing constraints
37
What best describes network computers in a regular setup?
Physical firewalls that protect network systems.
Web terminals that rely on network resources
Cloud-based servers replacing local machines.
Standalone devices with full processing power
38
Why do operating systems use User IDs (UIDs) and Group IDs (GIDs)?
To encrypt user data and protect against malware.
To track CPU usage and memory allocation per process.
To assign unique identifiers for each running process.
To differentiate access rights between individual users and groups.
39
Which of the following instructions are privileged?
Read the clock.
Access I/O device.
Set value of timer.
Modify entries in the device-status table.
Clear memory.
Turn off interrupts.
40
Which cloud service model offers a full software development environment?
Network as a Service (NaaS)
Software as a Service (SaaS)
Platform as a Service (PaaS)
Infrastructure as a Service (IaaS)
41
SUDDEN DEATH! Which cloud model provides raw computing resources like storage and servers?
IaaS
PaaS
SaaS
FaaS
42
Why is emulation generally slower than virtualization?
It translates instructions between different architectures
It directly executes guest OS instructions on the CPU
It only runs applications in isolated environments
It optimizes hardware for virtual machines
43
Which cloud service model provides ready-to-use applications over the internet?
Virtual Machine as a Service (VMaaS)
Software as a Service (SaaS)
Infrastructure as a Service (IaaS)
Platform as a Service (PaaS)
44
How does a distributed system create the illusion of a single system?
By using network protocols and operating systems to integrate resources.
By eliminating the need for a network connection.
By requiring a single control unit for all systems.
By running identical software on all computers in a network.
45
Which scenario best illustrates multiprogramming, not time-sharing?
A processor executing multiple threads for a single user’s program.
A batch system executing jobs consecutively with no user interaction.
A single-user system switching between browser and video editing software.
A server handling multiple users running their processes.
46
When is it acceptable for an operating system to "waste" resources?
When the system is in low-power mode.
When allocating excess memory to all processes.
When optimizing user interaction, like using a GUI.
When running multiple background processes unnecessarily.
47
What are the four main components of a computer system?
CPU, RAM, Hard Drive, Motherboard.
Hardware, Applications, Operating System, Users.
Input Devices, Output Devices, Software, Network.
Kernel, BIOS, Drivers, File System.
48
Which network type would best suit hospitals with multiple buildings around the city?
MAN
WAN
PAN
LAN
49
Some CPUs provide more than just user mode and kernel mode. What is one advantage of having multiple modes?
It allows multiple users to share the same OS without security risks.
It prevents all malware attacks.
It makes CPUs run twice as fast.
It improves security by adding access levels.
50
How could multiple CPU modes help manage device drivers like USB devices?
It completely eliminates the need for kernel mode.
USB drivers can run in a special mode without using kernel mode.
It speeds up USB transfer speeds by 50%.
It prevents USB devices from ever failing.

Operating Systems | Chapter 1 Review Flashcards | StudBud