CS 446 Practice

A digital illustration depicting a complex operating system architecture, with visual elements such as processes, threads, memory management, and a user interface on a computer screen. The style should be modern and engaging, suitable for educational content.

CS 446 Operating Systems Practice Quiz

Test your knowledge on operating systems concepts with our comprehensive CS 446 practice quiz! Designed for students and enthusiasts alike, this quiz offers a wide range of questions that cover fundamental topics in operating systems.

Key Features:

51 challenging questions
Multiple-choice, checkboxes, and drop list formats
Immediate scoring and feedback on your answers

51 Questions13 MinutesCreated by CodingEagle432

The smallest OS that uses the fewest resources is a sensor node OS.

True

False

Main is the entry point for C programs and this is where the OS will begin execution.

True

False

Preemption is the process of switching one process off of the CPU and another onto the CPU in its place.

True

False

Using a base register to translate virtual memory to physical memory prevents one process from accidentally overwriting another process’ address space.

True

False

Threads share address space, global variable and lists of open files.

True

False

Condition variables solve the CPU cycle waste that occurs a mutex that uses a busy-wait.

True

False

Which of the following are contained within a process [select all that apply].

Related/dependent processes

Alarms

Associated files

Registers

Which of the following are reasons to perform a context switch?

A process is too large to fit in memory

A process of higher priority than the one on the CPU needs the CPU

A running process has finished executing

A running process needs to wait for IO

When a process is created, the operating system automatically adds which of the following to the address space? [select all that apply]

Heap

Code

Empty Space

Threads

Which of the following conditions imply that creating threads in users space is a better choice than creating them in kernel space? [select all that apply]

The programmer wants to avoid trapping

The system needs to be scaled up

System calls need to be blocked

The OS needs scheduling flexibility

When is a semaphore preferred over a mutex? [select all that apply]

When inter-process threads need to coordinate access to the critical region

Semaphores are always preferred over simple mutexes

When intra-process threads need to coordinate access to the critical region

Semaphores are never preferred over a mutex

Which of the following would cause a process to be created? Select all that apply.

A running process initiates a system call

The user requests that a process is created

The process is blocked

The operating system is initialized

By design, which of the following operating systems are designed to handle many requests from many different users at one time? [select all that apply]

Server

Sensor node systems

Mainframe

The process with PID 1 in most unix backed operating systems is init

True

False

Processes usually share all of their information with other processes.

True

False

Time sharing implies that a single process is given the entire CPU.

True

False

Virtual address spaces encompass all possible addresses assigned to RAM.

True

False

The size of the physical address space and a process’ virtual address space must be the same.

True

False

When sharing physical memory across processes, each process’ physical memory should start at 0.

True

False

What is the purpose of the translation lookaside buffer?

To store the address of all the pages that have been created for a process

To cache frequently used pages so that they can be found better

To modify the memory space and its partitions

To map all address from virtual to physical memory

When a process is created, the operating system automatically adds which of the following to the address space [select all that apply]

Empty memory space

Heap

Code

Threads

A page fault occurs. Order the series of events that take place.

Segmentation causes internal fragmentation more often than external fragmentation

True

False

The modified bit is also known as the dirty bit.

True

False

Which of the following are benefits of using global page allocation over local page allocation? [select all that apply]

Less memory wasted

Less thrashing

Differentiates number of pages per process based on criteria

Page frame consistency

Which of the following algorithms are dependent on tracking the system time that a page was last referenced? [select all that apply]

Working set

LRU

NRU

WSClock

Which of the following requires the operating system to involve itself with paging? [select all that apply]

Process blocking

Process creation

Process termination

Process execution

Parallelism is preferred over multi threading when there is a shared data dependency among threads.

True

False

If process A is using a critical region, process B should be able to read from the critical region at the same time.

True

False

Threads share address space, global variables and lists of open files.

True

False

Which of the following conditions imply that creating threads in user space is a better choice than creating them in kernel space? Select all that apply.

The system will need to be scaled up

System calls need to be blocked

The programmer wants to avoid trapping

The OS needs scheduling flexibility

Which of the following are methods of mapping user space threads to kernel space threads? [select all that apply]

One to many

Many to many

One to one

Many to one

Character devices store IO device input as fixed-size, consecutive blocks.

True

False

DMA requires specialized hardware in the MMU.

True

False

Which of the following is the OS responsible for handling when IO occurs? [select all that apply]

Device management and access

Constructing a device driver

Creates a uniform interface between apps and hardware

Waiting for a device signal and acting appropriately

Which of the following allows data to be transferred between IO devices?

HDD

IO ports

Memory mapped IO

Bus

In Linux, directories are just specialized files.

True

False

Every file, including directories, has an associated, unique inode.

True

False

Which of the following entires would be present in a newly created directory?

Which of the following describes an untyped file system? [select all that apply]

Used in most modern OS

Does not care about file extension

Files are treated like a persistent array of bytes

Overwrites all data on the backend for that extension

A container is a VM.

True

False

A benefit of a VM is that it is portable.

True

False

Which of the following are common cloud service types?

Platform as a service

Infrastructure as a service

Software as a service

Hardware as a service

Which of the following is true of a type 1 hyper visor? [select all that apply]

Runs on bare metal

Adds a software layer between hardware and OS

Uses a host OS

Acts like an OS on the hardware

What is the role of the operating system in networking?

It provides the software necessary for networking communications

It manages access permissions

It allows the hardware to directly interact with the user space when a request is sent

It allows the user to directly manipulate the communication channel

If I introduce a new file system to an operating system, it must be mounted either manually or by the OS itself

True

False

Which of the following aspects of NFS does AFS improve?

Block writing

Redundancy

Client timeouts

Cache checking

The chmod command will allow a file’s protections to be changed

True

False

Ubuntu prioritizes ease of use over security.

True

False

Which of the following can be randomized to improve OS security?

Code entry points

Program counters

Heap

Stack

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CS 446 Practice

CS 446 Operating Systems Practice Quiz

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