P.L1

Question 1

A system software that provides a computer resource interface to users or application programs by efficiently managing the limited resources of computer hardware

Answer 1

Operating System

Question 2

is also a computer system that runs on the OS.

Answer 2

smartphone

Question 3

T/F: Merely ten years ago, nobody could have imagined web surfing, shopping, or watching movies in bed. The introduction of the smartphone made these things possible, as it was a computer for your hand.

Answer 3

TRUE

Question 4

whats the two dominant operating systems on the market when Most mobile operating systems have disappeared?

Answer 4

iOS & Android

Question 5

two operating systems that are in a heated battle for the diversity of functions and user-friendliness.

Answer 5

iOS & Android

Question 6

the base platform of a computer system for providing information services

Answer 6

OS

Question 7

the essential knowledge for understanding the system architecture is the?

Answer 7

operating system

Question 8

hese are two global enterprises among the top ten global companies in market value that provides the iOS and Android?

Answer 8

Apple & Google

Question 9

In the past, when smartphones were unknown, it is the one who provided operating systems for personal computers

Answer 9

Microsoft

Question 10

who provided operating systems for servers, such as mainframes and UNIX

Answer 10

IBM

Question 11

t/f: the first computers were set to operate single-purpose programs, as they did not have an OS?

Answer 11

true

Question 12

it controls the computer’s resources and implements usage policies to allocate resources to users through scheduling

Answer 12

Operating System (OS)

Question 13

It exchanges dat through input/output devices or outputs expectations or errors

Answer 13

Operating System (OS)

Question 14

Purpose of using OS? Enumerate

Answer 14

1. Abstraction
2. Virtualization
3. Management

Question 15

provides standardized API to application programs by abstracting the complexity of the computers hardware

Answer 15

Abstraction

Question 16

provides a function to enable application programs and users to share computer resources and to use a single virtual computer hardware

Answer 16

Virtualization

Question 17

maximizes computer resource performances and provides them to application programs while meeting computer resource constraits

Answer 17

Management

Question 18

What are the main functions of OS? Enumerate

Answer 18

1. Process Management
2. Main Memory Unit Management
3. File Management
4. Input/Output System management
5. Auxiliary memory management
6. Networking
7. Command-interpreter system

Question 19

it abstracts and virualize computer hardware to provide resources to application programs or to manage them efficiently

Answer 19

OS

Question 20

T/F: OS can be understood by the functions of managing main hardware components

Answer 20

True

Question 21

in simple terms, a process is a running program
However, it is actually more than just a program, as a process is a system work unit that allocates, uses, and recovers various resources, such as the CPU, storage unit, files, and input/ output units to perform its tasks.

Answer 21

process management

Question 22

An OS manages processes and performs the following tasks:

Answer 22

-Creating and disposing of user and system processes
- Terminating and re-running processes
-Providing a technique for process communication and synchronization
-Providing techniques to prevent deadlock

Question 23

The main memory is a depository that allows the CPU to fetch commands and data to use from the instructions.

Answer 23

Main memory unit management

Question 24

T/F: hard disk (HDD)the hardware that most people think of when they consider a storage unit. However, the main memory is a different type of storage.

Answer 24

TRUE

Question 25

The main memory must handle the following management functions to provide data to the CPU:

Answer 25

- Tracking and managing the space and the users that use the storage device - Deciding which process will occupy the memory space - Allocating and recovering memory space

Question 26

provides the function of abstracting these physical characteristics into files, the logical storage units

Answer 26

File management

Question 27

T/F: OS can store data through various physical devices. it is necessary to abstract media with different physical characteristics, such as magnetic tape, magnetic disks, optical disks, and flash memory, for the OS to use them.

Answer 27

TRUE

Question 28

What are the key functions of an operating system in file management?

Answer 28

- Creating and disposing of files - Creating and disposing of the directory - Providing primitive files and directory management - Mapping for the OS to use the file in the auxiliary memory unit - Storing the file in a nonvolatile storage medium

Question 29

The OS helps users use a device, even if they do not know its characteristics. Here, a device refers to an input/output device and includes a mouse, keyboard, printer, and speaker. Users can easily use these devices with the functions provided by the OS.

Answer 29

Input/output system management

Question 30

The volume of data used by a computer system is growing larger, from gigabytes and even to terabytes. However, the data used by a computer’s CPU is that which is in the main memory unit. The main memory does not provide the capacity at the terabyte level.

Answer 30

Auxiliary memory unit management

Question 31

The OS hands the following auxiliary memory unit management function to store the managed data:

Answer 31

Empty space management Storage allocation Disk scheduling

Question 32

A distributed system is a set of memory units or separate processors. Each processor communicates at a high speed through the network. The network integrates scattered computer resources into a system to improve the calculation speed, share data, and to enhance reliability.

Answer 32

Networking

Question 33

is one of the system programs that enables users to access the main OS functions. In MS-DOS of UNIX shell, a user can enter a command with a keyboard in order to run an OS function.

Answer 33

command-interpreter system

Question 34

what are types of main OS

Answer 34

1. PC OS a. Windows b. MAC OS 2. Mobile OS a. Android b. iOS 3. Server OS a. UNIX b. Linux c. Windows Server

Question 35

type of PC OS that - Developed by Microsoft - Stable and standardized GUI - Supported by many third-party programs

Answer 35

Windows

Question 36

type of PC OS that - Developed by Apple - Optimized for Apple’s hardware

Answer 36

MAC OS

Question 37

Type of Mobile OS that - Developed by Google (Acquired Android in 2005) - High openness - Installation using APK files

Answer 37

Android

Question 38

Type of Mobile OS that - Developed by Apple - Very secure - Installation of apps only available from the App Store

Answer 38

iOS

Question 39

t/f: Early computer systems could only execute one application program at a time. In other words, one program occupied all the system’s resources.

Answer 39

true

Question 40

t/f modern computer systems run multiple programs concurrently. The OS must manage computer resources so that multiple programs share resources and operate in stable condition at the same time

Answer 40

true

Question 41

refers to a running program, and in today’s concurrent multi-process environment, it is a work unit of a time-sharing system.

Answer 41

process

Question 42

T/F: a process has a distinct process status during its lifecycle

Answer 42

TRUE

Question 43

flow of process status:

Answer 43

created preparing running finished standby

Question 44

it means A process is created but is not running by the OS.

Answer 44

created

Question 45

it means The process is waiting for the CPU allocation to run.

Answer 45

preparing

Question 46

it means The process has the CPU allocation.

Answer 46

running

Question 47

The process has completed its running, and the CPU allocation is released.

Answer 47

finished

Question 48

The process ran after getting the CPU allocation and is waiting for an event, such as the completion of input or output.

Answer 48

standby

Question 49

stores information necessary for process management.

Answer 49

Process Control Block (PCB)

Question 50

t/f: A unique PCB is generated when a process is created, and the PCB is removed from the process completion.

Answer 50

true

Question 51

a pcb includes: enumerate

Answer 51

- A process identification number (PIC) - A process status - A program counter (the value that indicates the instruction to run next) - A scheduling priority - Registered information - Main memory unit information

Question 52

Processes must be able to run in parallel, and also be created and removed dynamically. A process can create other new processes through the "fork()" system call while it runs.

Answer 52

Process Creation

Question 53

The process that creates other processes called

Answer 53

parent process

Question 54

newly created process is called

Answer 54

child process

Question 55

t/f: child process can create another child process, and this relationship is formed in a tree structure

Answer 55

true

Question 56

After completing the last code of the program, the process requests the OS to delete the process with the "exit()" system call. At that point, the child process returns data to the parent process with the "wait()" system call, and the OS recollects all the resources allocated to the deleted process.

Answer 56

Process Termination

Question 57

a basic unit for using a CPU and is also called

Answer 57

lightweight process

Question 58

t/f: a process generally has one or more threads.

Answer 58

true

Question 59

t/f: A thread shares the memory unit, such as codes, data, and files, and creates its own register and stack. While processes use more CPU time than threads for context exchange, threads can exchange context more economically because threads share the memory unit.

Answer 59

true

Question 60

a single-thread process is a case in which a thread exists for a process, and a process having multiple threads is called

Answer 60

multi-thread process

Question 61

status where thread operates are:

Answer 61

ready blocked running terminated

Question 62

t/f: A CPU can occupy only one thread at a time. In other words, only one thread runs at a time, and the status of the other threads is "blocked". When a thread is blocked, other threads can run.

Answer 62

true

Question 63

t/f: The memory occupied by a process can be shared, and another thread can access the same memory address in a multi-thread system.

Answer 63

true

Question 64

t/f: The cost of thread creation and context exchange is more economical than the process.

Answer 64

true

Question 65

t/f: Threads increase the parallel attributes of the process and enable the utilization of multiprocessors.

Answer 65

true

Question 66

one thread managing code, data, file, register, and stack

Answer 66

single-thread process

Question 67

multiple threads sharing code, data, and file but having separate registers and stacks

Answer 67

multi-thread process

Question 68

Electronic devices, such as desktops, laptops, and smartphones, are collectively referred to as

Answer 68

computers

Question 69

is software, is responsible for the device operation from start to finish.

Answer 69

OS