IT0035 - Applied OS

Question 1

Process Control Block is also known as task control block. (True or False)

Answer 1

True

Question 2

What is a program or system software that acts as an interface between the user and the computer hardware and controls the execution of all kinds of programs.

Answer 2

Operating System (OS)

Question 3

Which is not an example of system software?
Group of answer choices
NotePad
MS word
Windows 10
Linux

Answer 3

MS word

Question 4

Which is not an example of storage device? Group of answer choices
Keyboard
RAM
ROM
Hard Disk

Answer 4

Keyboard

Question 5

CPU, memory and I/O devices, provides the basic computing resources.

Answer 5

Computer hardware

Question 6

Are used to solve the computing problems of the users such as word processors, games and business programs.

Answer 6

Application programs

Question 7

Who utilize a computer or network service trying to solve different problems.

Answer 7

Users

Question 8

These controls and coordinates the use of the hardware among the various application programs for the various users.

Answer 8

Operating Systems

Question 9

This refers to a non-interactive user interface, where the user specifies all the details of the batch job in advance. To speed up processing, jobs with similar needs are batched together and run as a group.
Graphical User Interface
Batch Operating System (BOS)
Command Line Interface
Menu-based Interface

Answer 9

Batch Operating System (BOS)

Question 10

• This is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing.
• This creates an interactive environment.
• is also known as multitasking.
• Examples: Unix, Linux, Multics and Windows.

Answer 10

Time-sharing Operating System

Question 11

Windows 10 is an example of hand-held operating system. (True or False)

Answer 11

False (Time-Sharing)

Question 12

This runs on a server and provides the server the capability to manage data, users, groups, security, applications, and other networking functions.

It’s primary purpose is to allow shared file and printer access among multiple computers in a network.

Answer 12

Network Operating System (NOS)

Question 13

This uses MULTIPLE central processors to serve multiple real-time applications and multiple users.

Also known as LOOSELY coupled systems or distributed systems.

Answer 13

Distributed Operating System

Question 14

UNIX is an example of Network OS. (True or False)

Answer 14

True

Question 15

Cloud computing is an example of distributed system. (True or False)

Answer 15

True

Question 16

It is an OS intended to serve real-time systems/applications that process data as it comes in, mostly without buffer delay.

These are used when there are time requirements or constraints like missile systems

Answer 16

Real-time Operating System (RTOS)

Question 17

In computer system organization, one or more CPUs, device controllers connect through common ____ providing access to shared memory.

Group of answer choices
node
bus
data
link

Answer 17

bus

Question 18

It is a signal created and sent to the CPU that is caused by some action taken by a hardware device.

Answer 18

Hardware interrupt

Question 19

It is a signal emitted by hardware or software when a process or an event needs immediate attention.

Group of answer choices
Disturb
Interrupt
Buffer
Link

Answer 19

Interrupt

Question 20

It is a signal created and sent to the CPU that is caused by some action taken by a software.

It arises due to illegal and erroneous use of an instruction or data

Answer 20

Software Interrupt

Question 21

The operating system preserves the state of the CPU by storing registers and the program counter.

Answer 21

Interrupt Handling

Question 22

Dual-mode operation allows OS to protect itself and other system components. (True or False)

Answer 22

True

Question 23

A type of interrupt handling in which the OS sends signal to each devices asking if they have a request.

Answer 23

Polling

Question 24

A type of interrupt handling in which the requesting device sends interrupt to the operating system

Answer 24

Vectored interrupt system

Question 25

Kernel acts like bridge between application and computer hardware. (True or False)

Answer 25

True

Question 26

Also known as parallel-system or multicore.

Answer 26

Multiprocessor System

Question 27

A recent trend in CPU design is to include multiple computing cores on a single chip. They can be more efficient than multiple chips with single core.

Answer 27

Multicore Systems

Question 28

There is one main CPU capable of executing a general-purpose instruction set.

Answer 28

Single-Processor System

Question 29

Multiprocessor Systems or Parallel systems are also known as __________-coupled systems. Group of answer choices Sweet Simply Loosely Tightly

Answer 29

Tightly

Question 30

It is a way for programs to interact with the OS. A computer program makes this when it makes a request to the OS's kernel. It changes mode to kernel, return from call resets it to user.

Answer 30

System call

Question 31

A type of multiprocessing in which a boss processor controls the system and the other processors either look to the boss for instructions or have predefined tasks This applies a boss-worker relationship among processors.

Answer 31

Asymmetric Multiprocessing

Question 32

The most commonly used type where each processor performs all tasks within the operating system. Here, All processors are considered peers

Answer 32

Symmetric Multiprocessing

Question 33

Like multiprocessor systems, but multiple systems working together. Usually sharing storage via a storage-area network (SAN).

Answer 33

CLUSTERED SYSTEMS

Question 34

This type of clustering has multiple nodes running applications, monitoring each other.

Answer 34

Symmetric clustering

Question 35

Office environment with PCs connected to a network. Now includes home networks which are firewalled and networked.

Answer 35

Traditional computer

Question 36

Asymmetric clustering has one machine in hot-standby mode. (True or False)

Answer 36

True

Question 37

Many systems now servers, responding to requests generated by clients.

Answer 37

Client-Server Computing

Question 38

Refers to computing on handheld smartphones and tablet computers

Answer 38

Mobile computing

Question 39

A collection of physically separate, possibly heterogeneous computer systems that are networked to provide users with access to the various resources that the system maintains.

Answer 39

Distributed system

Question 40

File-server is an example of client-server computing. (True or False)

Answer 40

True

Question 41

Types of Cloud Computing

Answer 41

Public cloud – cloud available via the Internet. Private cloud – cloud run by a company for that company’s own use. Hybrid cloud – cloud that includes both public and private.

Question 42

A software-generated interrupt caused either by an error or a user request is called _______________________ Group of answer choices Trap Lost interrupt System call Interrupt

Answer 42

Trap

Question 43

It is a technology that allows OS to run as applications within other operating system.

Answer 43

Virtualization

Question 44

It is a type of computing that delivers computing, storage and even applications as a service across a network.

Answer 44

Cloud Computing

Question 45

Cloud Computing Service Models

Answer 45

Software as a service(SaaS) - provides one or more applications available via the Internet. Platform as a service (PaaS) — software stack ready for application use via the Internet. Infrastructure as a service (IaaS) — servers or storage available over the Internet.

Question 46

This refers to a text-based type of user interface. Group of answer choices Graphical User Interface Menu-based Interface Command Line Interface Batch-based Interface

Answer 46

Command Line Interface

Question 47

Using the computer hardware in an efficient manner is one of the goals of OS. (True or False)

Answer 47

True

Question 48

The operating system should be able to detect _____ within the computer system and take the appropriate action. Group of answer choices files programs Virus errors

Answer 48

errors

Question 49

In program execution, the OS must have the capability to load a program into ________ and execute that program. Group of answer choices Hard Disk Directories Data Memory

Answer 49

Memory

Question 50

These are used to solve user computing problems such as word processors and business programs. Group of answer choices Application Programs Anti-Virus programs Utility Programs Operating Systems

Answer 50

Application Programs

Question 51

It is a program in execution.

Answer 51

Process

Question 52

A computer system consists of a collection of processes: 1.) Operating system processes execute system code. 2.) User processes execute user code.

Answer 52

True

Question 53

A program is a ________ entity, such as the contents of a file stored on disk while a process is an ________ entity.

Answer 53

PASSIVE (program) and ACTIVE (process)

Question 54

A process is actually a cycle of CPU execution (CPU burst) and I/O wait (I/O burst) (True or False)

Answer 54

True

Question 55

Process execution begins with a CPU burst that is followed by an I/O burst. (True or False)

Answer 55

True

Question 56

The process contains the temporary data such as method/function parameters, return address and local variables.

Answer 56

Stack

Question 57

This is dynamically allocated memory to a process during its run time.

Answer 57

Heap

Question 58

This includes the current activity represented by the value of Program Counter and the contents of the processor's registers.

Answer 58

Text

Question 59

This section contains the global and static variables.

Answer 59

Data

Question 60

A process may create several new processes, via a create-process system call, during the course of execution. The creating process is called ________

Answer 60

Parent Process

Question 61

In process state, WAITING STATE is when the process is waiting for the OS to assign a processor to it. (True or False)

Answer 61

False (Ready)

Question 62

In process state, READY STATE is when the process is waiting for some event to occur (such as an I/O completion) (True or False)

Answer 62

False (Waiting)

Question 63

In process state, READY STATE is when the process is waiting for the OS to assign a processor to it. (True or False)

Answer 63

True

Question 64

In process state, RUNNING state is when the CPU is executing its instructions. (True or False)

Answer 64

True

Question 65

In process state, WAITING STATE has finished execution. (True or False)

Answer 65

False (Terminated)

Question 66

Process control block is also known as task control block. (True or False)

Answer 66

True

Question 67

Each process is represented in the operating system by a ___________. It is a data block or record containing many pieces of the information associated with a specific process.

Answer 67

PROCESS CONTROL BLOCK (PCB)

Question 68

It indicates the address of the next instruction to be executed for this process.

Answer 68

Program Counter

Question 69

These include accumulators, index registers, stack pointers, and general-purpose registers, plus any condition-code information.

Answer 69

CPU Registers

Question 70

This information includes a process priority, pointers to scheduling queues, and any other scheduling parameters.

Answer 70

CPU Scheduling Information

Question 71

The goal of CPU scheduling is to optimize system performance is to MINIMIZE the throughput. (True or False)

Answer 71

False (Maximize)

Question 72

CPU being switched from one process to another is known as

Answer 72

Context Switch Diagram.

Question 73

A process terminates when it finishes its last statement and asks the operating system to delete it using the exit system call. (True or False)

Answer 73

True

Question 74

A process terminates when it finishes its first statement and asks the operating system to delete it using the exit system call. (True or False)

Answer 74

False

Question 75

As processes enter the system, they are put into a _______

Answer 75

job queue

Question 76

Selects processes from the secondary storage and loads them into memory for execution.

Answer 76

Long-term scheduler (or Job scheduler)

Question 77

Selects process from among the processes that are ready to execute, and allocates the CPU to one of them.

Answer 77

Short-term scheduler (or CPU scheduler)

Question 78

Removes (swaps out) certain processes from memory to lessen the degree of multiprogramming (particularly when thrashing occurs).

Answer 78

Medium-term scheduler

Question 79

The disk surface is logically divided into _____, which are subdivided into sectors. Group of answer choices bits patterns waves tracks

Answer 79

tracks

Question 80

It is the time it takes to actually transfer data between disk and main memory. Group of answer choices Seek time Transfer time Rotation time Latency Time

Answer 80

Transfer time

Question 81

These disks are coated with a hard surface, so the read-write head scans it directly on the disk surface without destroying the data. Group of answer choices Blu-ray discs floppy disks flappy disks compact discs

Answer 81

floppy disks

Question 82

Each disk platter has a flat _______ shape, like a phonograoh record. Group of answer choices circular square oval triangular

Answer 82

circular

Question 83

Modern disks are addressed as large one-dimensional arrays of logical blocks, where the ______ is the smallest unit of transfer. Group of answer choices local block logical block physical block sector block

Answer 83

logical block

Question 84

The main requirement of secondary storage is to be able to store very large amount of data _______ Group of answer choices sometime temporarily permanently everyday

Answer 84

permanently

Question 85

In a disk the information is recorded on the __ Group of answer choices inside edge outside surface

Answer 85

surface

Question 86

Which of the given is considered aspects of disk management for which an operating system is responsible. Group of answer choices Booting from disk all of these Bad-block recovery disk formatting

Answer 86

all of these

Question 87

A ________ movable-head system has only one read-write head per surface and the system moves the head to access a particular track Group of answer choices Fixed-Head System Movable-Head system Movable-Joint System Rotational-head system

Answer 87

Movable-Head system

Question 88

An incident where the head contacts the disk surface, the head will scrape the recording medium off the disk. Group of answer choices Head bang Head accident Head crashes Head crushes

Answer 88

Head crashes

Question 89

C-SCAN scheduling essentially treats the disk as though it were circular where the last track is adjacent to the first one. (True or False)

Answer 89

True

Question 90

The OS can improve on the average disk service time by scheduling the requests for disk access.(True or False)

Answer 90

True

Question 91

The Shortest Seek Time First disk scheduling selects the request with the maximum seek time from the current head position. Group of answer choices True False

Answer 91

False

Question 92

The First Come First Served disk scheduling selects the request according to the order in the disk queue Group of answer choices True False

Answer 92

True

Question 93

Since most jobs depend heavily on the disk for loading and input and output files, it is important that disk service be as fast as possible. Group of answer choices True False

Answer 93

True

Question 94

Given the following track requests in the disk queue compute for the total head movement (THM) of the R/W Head 98, 53, 22, 16, 24. Consider that the read write head is positioned at location 32. Compute for the total head movement for a 100 (0 - 99) track disk for each disk scheduling algorithm. Using C-SCAN (going lower tracks direction), what is the shortest distance between 2 tracks? Group of answer choices 4 tracks 1 track 2 tracks 3 tracks

Answer 94

1 Track

Question 95

Given the following track requests in the disk queue compute for the total head movement (THM) of the R/W Head 39, 14, 38, 17. Consider that the read write head is positioned at location 10. Compute for the total head movement for a 100 (0 - 99) track disk for each disk scheduling algorithm. Using LOOK (going higher tracks direction), what is the last served track request? Group of answer choices track 38 track 98 track 39 track 99

Answer 95

track 39

Question 96

Given the following track requests in the disk queue compute for the total head movement (THM) of the R/W Head 98, 53, 22, 16, 24. Consider that the read write head is positioned at location 32. Compute for the total head movement for a 100 (0 - 99) track disk for each disk scheduling algorithm. Using LOOK (going higher tracks direction), what is the last served track request? Group of answer choices track 16 track 53 track 24 track 98

Answer 96

track 16

Question 97

Which of the following example strategies belong to the key property “Adaptation and evolution to reduce effectiveness of future attacks”? Group of answer choices integrity checking intrusion recognition patterns authentication system diversification

Answer 97

Intrusion recognition patterns

Question 98

Computer “Virus” is a vulnerability of Single Computer (without E-mail or internet) Group of answer choices True False

Answer 98

True

Question 99

Which of the configurations is vulnerable to “Spoofing”? Group of answer choices Laptop without Internet Desktop Computer without internet LAN connected with or without Internet Desktop Computer without E-mail

Answer 99

LAN connected with or without Internet

Question 100

“Web Server” is a vulnerability of which configuration? Group of answer choices LAN connected (with internet) Desktop Computer without E-mail Laptop without Internet Desktop Computer without internet

Answer 100

LAN connected (with internet)

Question 101

Which of the following is an example strategy of the key property “Adaptation and evolution to reduce effectiveness of future attacks”? Group of answer choices intrusion recognition patterns attack recognition patterns intrusion recognition patterns contingency planning

Answer 101

Intrusion recognition patterns

Question 102

Which among the given is not a vulnerability of a LAN connected with internet? Group of answer choices LAN connected (with internet) LAN connected (without internet) Single Computer (without E-mail or internet) none of the these

Answer 102

Single Computer (without E-mail or internet)

Question 103

LAN connected (without internet) is vulnerable to “spoofing”. Group of answer choices True False

Answer 103

True

Question 104

Written policies and procedures and _______ user training are essential elements of system management Group of answer choices random regular occasional accidental

Answer 104

regular

Question 105

Which of the configurations is vulnerable to “Sniffers”? Group of answer choices LAN connected with or without Internet Desktop Computer without internet Desktop Computer without E-mail Laptop without Internet

Answer 105

LAN connected with or without Internet

Question 106

“E-mail” is a vulnerability of LAN connected (with internet). Group of answer choices True False

Answer 106

True

Question 107

Snoopers are programs that reside on computers attached to the network. Group of answer choices True False

Answer 107

False

Question 108

Infects data files (such as word processing documents, spreadsheets, etc.) Group of answer choices Boot sector virus Macro Virus Micro Virus Multipartite virus

Answer 108

Macro Virus

Question 109

These refer to entering systems by guessing authentic passwords. Group of answer choices Trap Doors Browsing Repeated trials Phishing

Answer 109

Repeated trials

Question 110

It is when an unauthorized users gain access to search through secondary storage directories or files for information they should not have the privilege to read. Group of answer choices Trap doors Browsing Denial of Service (DoS) attack Wire Tapping

Answer 110

Browsing

Question 111

Repeated trials is also known as Brute Force Attack Group of answer choices True False

Answer 111

True

Question 112

This infects the boot record of a disk, saving a legitimate copy of the master boot record in a different location on the volume. Group of answer choices File infector virus Boot sector virus Master record virus Master boot record virus

Answer 112

Master boot record virus

Question 113

Logic Bomb is a destructive program that can be triggered by a keystroke or connection with the Internet Group of answer choices True False

Answer 113

True

Question 114

Spoofing can be applied to emails, phone calls, and websites Group of answer choices True False

Answer 114

True

Question 115

A type of virus which is triggered by a certain event like keystroke Group of answer choices Logic Bomb Key bomb Trojan virus Time bomb

Answer 115

Logic Bomb

Question 116

________ is one in which a malicious hacker takes over computers via the internet and causes them to flood a target site with demands for data and other small tasks causing a computer to perform repeated unproductive task. Group of answer choices Browsing Denial of Service (DoS) attack Wire Tapping Trap doors

Answer 116

Denial of Service (DoS) attack

Question 117

another approach in space management where all the free disk blocks are linked together called?

Answer 117

Linked List

Question 118

how many bits represent each block in a Bit vector?

Answer 118

a single bit

Question 119

Before a computer can make use of a new disk....

Answer 119

The disk must undergo physical formatting (low-level formatting)

Question 120

A disk management where in order to make a computer start running....

Answer 120

bootstrap

Question 121

contingency planning is an example strategy of the key property....

Answer 121

Recovery of essential and full services after attack

Question 122

technique whereby system intruders gain access to....

Answer 122

Social Engineering.

Question 123

Intrusion detection is an example of...

Answer 123

Recognition of attacks and resulting damage

Question 124

The Ease of detection of a....

Answer 124

High - Single computer (without e-mail or Internet) Medium - LAN connected (without Internet) Low - LAN connected (with Internet)

Question 125

A hardware malfunction is an example of....

Answer 125

Unintentional intrusion

Question 126

A virus must be.....

Answer 126

Self-executing Self-replicating

Question 127

Three methods for system protection

Answer 127

Antivirus software Firewalls Encryption