Disk Management In Operating System

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 Disk Management  Disk is a secondary storage device that is used to store data.  The external devices such as hard disk, magnetic disks and floppy disks stores data in the sectors.  These devices provide the data to user programs by means of I/O requests.  Disk Management is an important function of operating system and includes disk buffering and management of swap area and disk cache.  Disk Structure  Disks provide a means to store a large amount of information for modern computer.  A disk is usually divided into tracks, cylinder and sectors.  Below fig shows the various components of a disk system.  Data is stored on a series of magnetic disks called platters. These disks are connected by a common spindle that spins at very high speed (some spindle rotate at speeds of 3600 revolutions per minute).  The two surfaces of a platter are covered with a magnetic material similar to that on a magnetic tape. Information is recorded mag...
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Frequently asked questions of computer network

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 Frequently asked questions 

1. What is Amplitude? 

Ans :- The Amplitude of the signal is the value of the signal at any point on the wave. 

2. What is Attenuation? 

Ans :- it is the loss of the signals energy due to the resistance of the medium. 

3. What is modem? 

Ans :- Modem is a device used to convert the digital signal into analog vice - versa. 

4. What is switching? 

Ans :- It is the point to point live configuration which creates a dedicated link between two devices. 

5. Define computer network? 

Ans :- When Two or more computers are connected logically with the help of data communication devices and transmission media. This type of situation is referred as a computer network. 

6. How you can measure the efficiency of Network? 

Ans :- To measure the efficiency of Network the major components are 

(1) Performance 

(2) Reliability 

(3) Security 

7. What are various factors taken into the account to establish the computer Network? 

Ans :- To establish computer network the various factors are 

* Reliability 

* Cost 

* Response Time 

8. In the network architecture, in how many categories the computer network can be categorised? 

Ans :- In general we can devide the components of computer network in two categories. 

(i) physical component :- physical components includes computer hardware, terminal, front and processor, transmission media, multiple or data switching equipment ectopic. 

(ii) Logical Component :- logical components includes network Operating system, network software, file Management system, communication software, application software etc. 

9. Define Protocol? 

Ans :- Set of rules to communicate between the two system. 

10. What are the different types of computer network?

Ans :- There are three types of computer network 

1. LAN (Local Area Network) 

2. WAN (Wide Area Network) 

3. MAN (Metropoliton Area Network) 

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