What is Operating System ? Functions of Operating System
What is Operating System ?
- An operating system is a software program that provides an interface between user & the computer and manages thousands of applications.
- It’s a collection of system software that co-ordinates between the hardware, provides a platform for software to run on.
- An operating system is an integrated set of programs that the resources (the CPU, memory, I/O devices etc) of computer system & provides an interface to the user to run the machine.
- The main two primary objective of operating system are:
Making a computer system convenient to use
Managing the resources of a computer system
Functions of Operating System :-
1) PROCESS MANAGEMENT
- The process management of OS taking care about the creation & deletionof user & system process, providing mechanism for process synchronization & process communication.
2) MEMORY MANAGEMENT
- The memory management of OS taking care about the allocation & deallocation of memory space to the various programs in need of this resource.
3) FILE MANAGEMENT
- The file management of OS is taking care about the file related activities such as creation, storing, retrieving, naming, sharing & organization of files.
4) SECURITY
- The security model of OS protects the resources & information of a computer system against destruction & unauthorized access.
5) COMMAND INTERPRETATION
- This model taking care of interpreting user commands & directing the system resources to handle the requests.
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Basic Computer Questions
Q : The main system board of the computer is called ____.
(A) Motherboard
(B) Processor
(C) Microchip
(D) None of these
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Q : Which of the following system components is the brain of a computer?
(A) Circuit board
(B) CPU
(C) Memory
(D) Network card
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Q : What is the built-in permanent memory in a computer called?
(A) RAM
(B) ROM
(C) CPU
(D) CD-ROM
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Q : Which of the following is the full form of NTFS?
(A) New Tree File system
(B) New Technology file system
(C) New Table file system
(D) Both B and C
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Q : Which of the following is not a hardware processing chip ?
(A) Processing chip
(B) printer
(C) mouse
(D) Java
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Q : The monitor of a computer is-
(A) storage device
(B) processing device
(C) input device
(D) output device
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Q : Which protocol does Ping use?
(A) TCP
(B) ARP
(C) ICMP
(D) BootP
(E) None of these
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Q : If you wish to extend the length of the network without having the signal degrade, you would use a ___.
(A) Gateway
(B) Router
(C) Modem
(D) Repeater
(E) Resonator
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Q : A series of instructions that tells a computer what to do and how to do it is called a ______.
(A) program
(B) command
(C) user response
(D) processor
(E) None of these
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Q : Verification of a login name and password is known as_____.
(A) Configuration
(B) Accessibility
(C) Authentication
(D) logging in
(E) None of these
Answer ⇒ ??