The hardware to measure elapsed time and to trigger operations is called$\_\_\_\_\_\_$

Question $16$ options:

PCI bus device driver

Virtual crontab

Programmable interval timer

Programmable interval interface

Question $17(1\mathrm{.}25$ points$)$

Saved

Access $($o$,$ d$,$ read$)$ means

Question $17$ options:

Domain o has read access to object d

Object o has read access to domain d

Domain d has read access to object o

Object d has read access on domain o

Question $18(1\mathrm{.}25$ points$)$

Saved

$\_\_\_\_\_\_\_\_$ is a directory structure that allows directories to share subdirectories and$/$or files

Question $18$ options:

Acyclic Graph Directory

Tree$-$Structure Directory

General Graph Directory

Linear Directory

Question $19(1\mathrm{.}25$ points$)$

Saved

Which statement is correct out of the following

Question $19$ options:

Fine$-$grained protection is more complex yet less protective

Rough$-$grain protection is less complex yet more protective

Rough grain is more protective that fine grain

Fine grain is more protective that rough grain

Question $20(1\mathrm{.}25$ points$)$

Saved

Computer peripherals don't use standards OS command; therefore, they rely on $\_\_\_\_\_\_\_$

Question $20$ options:

Directory structure

Device controller

Device driver

Memory management unit, MMU

Question $21(1\mathrm{.}25$ points$)$

Saved

Which of the following statement is correct regarding distributed computing

Question $21$ options:

Using distributed computing enables computation speedup

A company can balance seasonal traffic spike with system load sharing

Codebase has to exist and persist on every node within a distributed system

Operation managers are able to detect and recover from site failures gracefully without impacting users experience

Question $22(1\mathrm{.}25$ points$)$

Saved

Alice would like to have a very simple directory structure, what would be your recommendation to her?

Question $22$ options:

use raw disk structure

use simple$-$tree directory structure

use Unix directory structure

use single$-$level directory structure

Question $23(1\mathrm{.}25$ points$)$

Saved

OS determines the type of operations performed on a file by using

Question $23$ options:

file extension

file path

file lock

file format

Question $24(1\mathrm{.}25$ points$)$

Saved

$\_\_\_\_\_\_\_$ is achieved by allowing processes to access data only when they need to for a specific duration of time.

Question $24$ options:

Role$-$base access control

Least privilege principle

Rule$-$base access control

Need to know principle

Question $25(1\mathrm{.}25$ points$)$

Saved

An automated attempt to connect to a range of ports in a network is known as $\_\_\_\_\_$

Question $25$ options:

nmap scan

nessus scan

brute force

port scanning

Question $26(1\mathrm{.}25$ points$)$

Saved

Which Access Matrix implementation is more suitable for user's protection

Question $26$ options:

Global table

Access lists

Lock$-$key

Capability list

Question $27(1\mathrm{.}25$ points$)$

Saved

$\_\_\_\_\_\_\_$ allows several processes to acquire the file concurrently

Question $27$ options:

Exclusive lock

Shared lock

Advisory lock

Mandatory lock

Question $28(1\mathrm{.}25$ points$)$

Saved

A rights$-$set in a protection policy is $\_\_\_\_\_\_\_$

Question $28$ options:

A subset of all objects that can be performed by an operation

A set of all domains that can be secured by an object

A subset of all operations that can be performed on the object

A set of all processes that a domain has access$/$rights to

Question $29(1\mathrm{.}25$ points$)$

Saved

Packet switching incurs more overhead per message, but require less setup time

Question $29$ options:

True

False

Question $30(1\mathrm{.}25$ points$)$

Saved

VMM cycle stealing means $\_\_\_\_$

Question $30$ options:

native OS and guest OS are running on two different cycles

guest OS doesn't receive the CPU cycles they expect

additional binary translation is needed by the VMM

native OS don't receive the CPU cycles they expect

Question $31(1\mathrm{.}25$ points$)$

Saved

A potential security violation is called $\_\_\_\_\_\_\_$

Question $31$ options:

an attack

a threat

a breach

a reconnaissance

Question $32(1\mathrm{.}25$ points$)$

Saved

$\_\_\_\_\_\_\_\_$is a program that lets the operating system communicate with specific computer hardware.

Question $32$ options:

Device driver

Device controller

Directory structure

Memory management unit, MMU

Question $33(1\mathrm{.}25$ points$)$

Saved

Which of the following statements are false about Tree$-$structure directory $($select all that applies$)$

Question $33$ options:

Tree$-$structure directory allows any given directory within the structure to have only files

Tree$-$structure directory is rarely used in the enterprise.

Tree$-$structure directory has a root directory

Both Windows and Linux allow tree$-$structure directory

answer me all correct options from questions $16$ to $33,$ and send me only correct options