CS452 Quizzes

____ operating systems are designed primarily to maximize resource utilization.

- PC

- Handheld computer

- Mainframe

- Network

Mainframe

Which of the following programs runs all the time on the computer?

- compiler

- assembler

- text editor

- kernel

kernel

True or False:

There is no universally accepted definition of an operating system.

True

Which of the following is NOT secondary storage device?

- random access memory

- solid state disks

- optical disk

- magnetic tape

random access memory

Which of the following is nonvolatile?

- register

- cache

- main memory

- hard-disk drive

hard-disk drive

Which of the following is tertiary storage medium?

- register

- magnetic tapes

- main memory

- hard-disk drive

magnetic tapes

The CPU catches the interrupt and ____ it to the interrupt handler

- raises

- catches

- dispatches

- clears

dispatches

The device controller _____ an interrupt by asserting a signal on the interrupt request line.

- raises

- catches

- dispatches

- clears

raises

Which of the following storage medium is the slowest regarding access speed?

- cache

- solid state drive

- register

- main memory

solid state drive

True or False:

Solid state disks are considered volatile storage.

false

Which of the following is the definition of processor?

- the hardware that executes instructions

- a physical chip that contains one or more CPUs

- the basic computation unit of the CPU

- including multiple computing cores on the same CPU

a physical chip that contains one or more CPUs

Where is the location of L1 cache?

- inside CPU core

- inside processor but outside CPU core

- inside main memory

- inside registers

inside CPU core

True or False:

Virtually all modern operating systems provide support for SMP

true

True or False:

A system call runs in kernel mode only.

true

The two separate modes of operating in a system are

- supervisor mode and system mode

- kernel mode and privileged mode

- physical mode and logical mode

- user mode and kernel mode

user mode and kernel mode

True or False:

Solid state disks are generally faster than magnetic disks.

true

True or False:

A system call is triggered by hardware.

false

Which of the following are used by Linux kernel as data structures?

- Lists, Stacks, and Queues

- Trees

- Hash Functions and Maps

- Bitmaps

- All of the above

All of the above

Which of the following principles is used for adding and removing items from a queue?

- first in first out (FIFO)

- last in first out (LIFO)

- random order

- round robin

first in first out (FIFO)

Which of the following principles is used for adding and removing items from a stack?

- first in first out (FIFO)

- last in first out (LIFO)

- random order

- round robin

last in first out (LIFO)

True or False:

VMware is a virtual machine manager when it manages guest operating systems.

true

Which of the following technology reduces the overhead for bulk data movement?

- Direct Memory Access (DMA)

- Non-uniform Memory Access (NUMA)

- Symmetric Multiprocessing (SMP)

- Storage Area Network (SAN)

Direct Memory Access (DMA)

Which of the following will trigger an interrupt?

- kernel function

- software execution

- CPU execution

- I/O completion

I/O completion

Which of the following components of a computer system defines the ways to use system resources to solve computing problems?

- application programs

- operating system

- computer hardware

- computer logo

application programs

Which of the following contains the addresses of all the service routines?

- page table

- interrupt vector

- system call table

- file descriptor table

interrupt vector

Which of the following is an inter-process communication that requires two processes share memory?

- message passing

- shared memory

- socket communication

- all of the above

shared memory

Which of the following is not a type of command interpreter?

- Bourne shell

- C shell

- Korn shell

- KDE or GNOME

KDR or GNOME

Which of the following is a user interface where human fingers slide across the screen or press buttons to select choices?

- touch screen

- graphical user interface

- command line

- voice control

touch screen

Which of the following is not an operating system service?

- program execution

- I/O operation

- protection and security

- graphical user interface

graphical user interface

Which of the following is the only gateway between user space and kernel space?

- user interface

- system call

- operating system

- hardware drivers

system call

What is the relationship between library call open() and open() system call?

- open() system call is part of open()

- open() system call in an alternate version of open()

- open() is a predecessor version of open() system call

- open() invokes open() system call to get service from operating system

open() invokes open() system call to get service from operating system

What category of system call includes the ones for process creation of and termination?

- process control

- file management

- device management

- protection

process control

The ________ provides a portion of the system call interface for UNIX and Linux.

- POSIX

- Java

- Standard C library

- Standard API

Standard C library

A message-passing model is ____.

- easier to implement than a shared memory model for intercomputer communication

- faster than the shared memory model

- a network protocol, and does not - apply to operating systems

- only useful for small simple operating systems

easier to implement than a shared memory model for intercomputer communication

True or False:

Application programmers typically use an API rather than directory invoking system calls.

true

Which of the following defines the view of the operating system seen by most users?

- application and system programs

- system calls

- device drivers

- library calls

application and system programs

True or False:

In general, Windows system calls have longer, more descriptive names and UNIX system calls use shorter, less descriptive names.

true

True or False:

Applications compiled on one operating system can be directly executable on other operating systems due to common structure.

false

True or False:

One important principle is the separation of policy from mechanism.

true

Which of the following operating system structure is the one for Mach OS?

- monolithic structure

- layered structure

- microkernel

- modular approach

microkernel

Which of the following operating system structure involves using loadable kernel module in design?

- monolithic structure

- layered structure

- microkernel

- modular approach

modular approach

True or False:

Mac OS X is a hybrid system consisting of both the Mach microkernel and BSD UNIX.

true

Which of the following is the correct program type for GRUB in Linux and Unix systems?

- bootstrap program

- compiler program

- binder program

- system utility

bootstrap program

When a process fails, the operating system takes a ________ which can then be probed by a debugger for failure analysis?

- core dump

- crash dump

- capture of network statistic information

- capture of CPU usage information

core dump

True or False:

iOS is open source, Android is closed source.

false

Which of the following inter-process communication is used in microkernel?

- message passing

- shared memory

- socket communication

- all of the above

message passing

True or False:

Many operating system merge I/O devices and files into a combined file because of the similarity of system calls for each.

true

What is the Linux equivalent of the Windows CreateProcess() system call?

- NTCreateProcess()

- process()

- fork()

- getpid()

fork()

_____ provide(s) an interface to the services provided by an operating system.

- Shared memory

- System calls

- Simulators

- Communication

System calls

Which of the following statements is incorrect?

- An operating system provides an environment for the execution of programs.

- An operating system manages system resources.

- Operating systems provide both command line as well as graphical user interfaces.

- Operating systems must provide both protection and security.

Operating systems provide both command line as well as graphical user interfaces

Which of the following contains dynamically allocated data during program run time?

- text section

- data section

- heap section

- stack section

heap section

Which of the following contains the executable code?

- text section

- data section

- heap section

- stack section

text section

Which of the following contains global data?

- text section

- data section

- heap section

- stack section

data section

Which of the following contains memory allocated by malloc()?

- text section

- data section

- heap section

- stack section

heap section

Which of the following process state will be switched from "running" state when an interrupt occurs?

- ready

- terminated

- waiting

- new

ready

Which of the following process state will be switched from "running" state when an I/O event occurs?

- ready

- terminated

- waiting

- new

waiting

Which of the following process state will be switched from "ready" state?

- ready

- terminated

- waiting

- running

running

True or False:

The difference between a program and a process is that a program is an active entity while a process is a passive entity.

false

True or False:

For a single-processor system, there will never be more than one process in the Running state.

true

Which of the following memory space dynamically grows from high memory to low memory?

- text section

- data section

- heap section

- stack section

stack section

Which of the following data structure is used to manage the processes in Linux?

- tree

- linked list

- hash map

- stack

linked list

Which of the following structures defines the process control block for Linux system?

- task_struct

- files_struct

- mm_struct

- schedu_entity

task_struct

What is the degree of multiprogramming for a single-processor system?

- 0

- 1

- 2

- 3

1

Which of the following is true?

- An I/O-bound process is one that spends more of its time doing I/O than it spends doing computations

- An I/O-bound process is one that spends more of its time doing computations than it spends doing I/O

- Both A and B

- None of the above

An I/O-bound process is one that spends more of its time doing I/O than it spends doing computations

Which of the following cases could force a process removed from the CPU?

- I/O request

- fork a child

- interrupt or time slice expired

- all of the above

all of the above

The list of processes waiting to execute on a CPU is called a(n) ____.

- standby queue

- device queue

- ready queue

- interrupt queue

ready queue

Which of the following selects from among the processes that are in the ready queue to execute and allocate the CPU to one of them?

- CPU scheduler

- context switch

- swapping

- job scheduler

CPU scheduler

Which of the following system calls is used to let the parent process create a child process?

- abort();

- wait();

- fork();

- exec();

fork();

Which of the following system calls is used to have a new program loaded into the new process's memory space?

- fork()

- exec()

- wait()

- exit()

exec()

True or False:

The exec() system call creates a new process.

false

True or False:

All processes in UNIX first translate to a zombie process upon termination.

true

Child processes inherit UNIX ordinary pipes from their parent process because:

- The pipe is part of the code and children inherit code from their parents.

- A pipe is treated as a file descriptor and child processes inherit open file descriptors from their parents.

- The STARTUPINFO structure establishes this sharing.

- All IPC facilities are shared between the parent and child processes.

A pipe is treated as a file descriptor and child processes inherit open file descriptors from their parents.

True or False:

The communication with named pipes requires parent-child relationship.

false

True or False:

Ordinary pipes are unidirectional, allowing only one-way communication.

true

True or False:

The Mach operating system treats system calls with message passing.

true

Which of the following items are shared across multiple threads belonging to the same process?

- code, data, files

- registers

- stack

- all of the above

code, data, files

In a multithreaded server architecture, which of the following is used to service a new user request?

- a new created thread

- a new created process

- the same process for prior users

- none of the above

a new created thread

Which of the following benefits go to multithreaded programming?

- responsiveness

- resource sharing

- economy

- scalability

- all of the above

all of the above

True or False:

Virtually all contemporary operating systems support kernel threads.

true

Which of the following refers to the capability to allow multiple tasks make progress on a single processor system?

- concurrency

- parallelism

- data parallelism

- task parallelism

concurrency

True or False:

Parallelism can be achieved on single-processor systems.

false

True or False:

Concurrency is inherently equivalent to parallelism.

false

Which of the following models are possible for the relationship between the user threads and kernel threads?

- many-to-one model

- one-to-one model

- many-to-many model

- two-level model

- all of the above

all of the above

The _____ model maps each user-level thread to one kernel thread.

- many-to-many

- two-level

- one-to-one

- many-to-one

one-to-one

True or False:

One-to-one model provides more concurrency than the many-to-one model by allowing another thread to run when a thread makes a blocking system call.

true

Which of the following is a function that can be provided by Pthreads API for constructing a multithreaded program?

- pthread attr init

- pthread_create

- pthread_join

- all of the above

all of the above

Which of the following is an asynchronous signal?

- illegal memory access

- division by zero

- terminating a process with specific keystrokes

- none of the above

terminating a process with specific keystrokes

Which of the following is a synchronous signal?

- illegal memory access

- terminating a process with specific keystrokes

- having a timer expire

- none of the above

illegal memory access

Which of the following options exist to deliver signals in multithreaded program?

- deliver the signal to the thread to which the signal applies

- deliver the signal to every thread in the process

- deliver the signal to certain threads in the process

- assign a specific thread to receive all signals for the process

- all of the above

all of the above

To associate each thread created using an implicit technique such as a thread pool, with its unique transaction identifier, we could use ____?

- global variable

- local variable

- static data

- thread-local storage

thread-local storage

True or False:

The default signal handler can be overridden by a user-defined signal handler.

true

True or False:

Thread-local storage is inherently equivalent to local variables.

false

Which are included in the context of a thread?

- register set

- stacks

- private storage area

- all of the above

all of the above

True or False:

When fork() is invoked, it is passed a set of flags that determine how much sharing is to take place between the parent and child tasks.

false

True or False:

Deferred cancellation is preferred over asynchronous cancellation.

true

The ready queue can be implemented as a _______________.

- unordered linked list

- tree

- all of the above

- priority queue

- FIFO queue

all of the above

Which of the following circumstances can cooperative scheduling take place?

- when a process switches from the running state to the waiting state

- when a process switches from the waiting state to the ready state

- when a process switches from the running state to the ready state

- none of the above

when a process switches from the running state to the waiting state

Which of the following circumstances can preemptive scheduling take place?

- when a process terminates

- when a process switches from the waiting state to the ready state

- none of the above

- when a process switches from the running state to the waiting state

when a process switches from the waiting state to the ready state

Which of the following items does not belong to the function of a dispatcher?

- switching context from one process to another

- selecting a process among the available ones in the ready queue

- switching to user mode

- jumping to the proper location in the user program to resume that program

selecting a process among the available ones in the ready queue

Which of the following criteria is more important for an interactive system?

- Throughput

- Turnaround time

- Response time

- CPU utilization

response time