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.

Which of the following best describes virtualization?

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

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

It allows systems to communicate over networks.

What is the purpose of the bootstrap program?

To boot up the system and load the OS kernel.

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

To provide secure external access to internal systems.

What is the role of the host OS in virtualization?

It allows guest OSes to run while managing hardware resources

Which scenario best illustrates multiprogramming, not time-sharing?

A batch system executing jobs consecutively with no user interaction.

Which of the following is true about memory storage hierarchy?

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

How does virtualization enable cloud computing?

It allows multiple virtual machines to share physical hardware efficiently.

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

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

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

When optimizing user interaction, like using a GUI.

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

Protection and security are interchangeable concepts in an OS.

Why are firewalls essential in networks?

They protect networks from internet-based attacks

Which of the following instructions are privileged?

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

Which scenario would most likely require a WAN?

A university campus spread across different cities.

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

They are special-purpose systems found in everyday devices

What is a fundamental component of cloud computing environments?

Traditional OSes, VMMs, and cloud management tools.

Why are caches useful?

They help devices transfer data at different speeds.

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.

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.

The core program of the OS running at all times.

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 can timers be used to compute the current time?

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

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.

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

It manages and facilitates resource sharing across a network.

Which of the following best describes a LAN?

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

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

It ensures processing must be done within strict time limits

Which of the following statements about multiprogramming is true?

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

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.

What is a key difference between emulation and virtualization?

Emulation allows different CPU architectures to run software

Why is emulation generally slower than virtualization?

It translates instructions between different architectures

Which statement best describes a system call?

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

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

It distributes incoming requests across multiple resources

What best describes a distributed computing system?

A group of connected but independent systems working together.

Which statement about mobile computers in networks is true?

They connect via wireless networks.

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

Processing must be completed within a defined time constraint

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

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

What is the primary role of Operating Systems?

To manage hardware and software resources

What role do firewalls play in cloud computing?

They secure network access by filtering traffic.

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

By using network protocols and operating systems to integrate resources.

What are the four main components of a computer system?

Hardware, Applications, Operating System, Users.

studbud

Operating Systems | Chapter 1 Review

50 termsStudBud Administration43 plays

Imported from external platform

Flashcards50 cardsFPractice quizPHost liveL

Questions 50

Answers

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

Operating Systems | Chapter 1 Review Flashcards | StudBud