Q. What do you understand by storage device? Name various storage devices. Definition of Computer? Types of computer based on capacity and performance. Describe the classification of computers on the basis of construction and working principles. Describe the recording method in compact disk
Q. What do you understand by storage device? Name various storage devices.
A data storage device is a device for recording (storing) information. Recording can be done using virtually any form of energy, spanning from manual muscle power in handwriting, to acoustic vibrations in phonographic recording, to electromagnetic energy modulating magnetic tape and optical discs. There are two storage devices used in computers; a primary storage device such as computer RAM and a secondary storage device such as a computer hard drive. The secondary storage could be a removable, internal, or external storage.
There are some additional examples of storage devices that are used with computers. 1) Floppy diskette 2) CD-ROM disc 3) CD-R and CD-RW disc 4) Cloud storage 5) DVD-R, DVD+R, DVD-RW, and DVD+RW disc 6) Jump drive and USB flash drive 7) Hard drive 8) LS-120 9) Tape cassette 10) Zip diskette
Q. Definition of Computer? Types of computer based on capacity and performance.
Computers are machines that are manually programmed to perform calculations and tasks that range in complexity, scale and range. Not all computers are similar; they differ in capabilities, size, price and usability, and are designed to meet the diverse needs of a variety of end users-nuclear scientists, waste water engineers, financial consultants, students and homeowners.
* Super Computers
* Mainframe Computers
* Mini Computers and
* Micro Computers
Super Computers: These computers can process billions of instructions per second. Normally, they will be used for applications which require intensive numerical computations such as stock analysis, weather forecasting etc.
Mainframe Computers: Mainframe computers can also process data at very high speeds i.e., hundreds of million instructions per second and they are also quite expensive. Normally, they are used in banking, airlines and railways etc for their applications.
Mini: Mini computers are lower to mainframe computers in terms of speed and storage capacity. They are also less expensive than mainframe computers. Some of the features of mainframes will not be available in mini computers.
Micro Computers: The invention of microprocessor (single chip CPU) gave birth to the much cheaper micro computers. They are further classified into
* Desktop Computers
* Laptop Computers
* Handheld Computers(PDAs).
Q. Describe the classification of computers on the basis of construction and working principles.
Analog Computer: An analog computer (spelt analogue in British English) is a form of computer that uses continuous physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved
Digital Computer: A computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system
Hybrid (Analog + Digital): A combination of computers those are capable of inputting and outputting in both digital and analog signals. A hybrid computer system setup offers a cost effective method of performing complex simulations.
Q. Describe the recording method in compact disk.
A molded plastic disc containing digital data that is scanned by a laser beam for the reproduction of recorded sound and other information. Since its commercial introduction in 1982, the audio CD has almost completely replaced the phonograph disc for high-fidelity recorded music. Co invented by Philips Electronics N.V. and Sony Corporation in 1980, the compact disc has expanded beyond audio recordings into other storage-and-distribution uses, notably for computers (CD-ROM) and entertainment systems (videodisc).
A data storage device is a device for recording (storing) information. Recording can be done using virtually any form of energy, spanning from manual muscle power in handwriting, to acoustic vibrations in phonographic recording, to electromagnetic energy modulating magnetic tape and optical discs. There are two storage devices used in computers; a primary storage device such as computer RAM and a secondary storage device such as a computer hard drive. The secondary storage could be a removable, internal, or external storage.
There are some additional examples of storage devices that are used with computers. 1) Floppy diskette 2) CD-ROM disc 3) CD-R and CD-RW disc 4) Cloud storage 5) DVD-R, DVD+R, DVD-RW, and DVD+RW disc 6) Jump drive and USB flash drive 7) Hard drive 8) LS-120 9) Tape cassette 10) Zip diskette
Q. Definition of Computer? Types of computer based on capacity and performance.
Computers are machines that are manually programmed to perform calculations and tasks that range in complexity, scale and range. Not all computers are similar; they differ in capabilities, size, price and usability, and are designed to meet the diverse needs of a variety of end users-nuclear scientists, waste water engineers, financial consultants, students and homeowners.
* Super Computers
* Mainframe Computers
* Mini Computers and
* Micro Computers
Super Computers: These computers can process billions of instructions per second. Normally, they will be used for applications which require intensive numerical computations such as stock analysis, weather forecasting etc.
Mainframe Computers: Mainframe computers can also process data at very high speeds i.e., hundreds of million instructions per second and they are also quite expensive. Normally, they are used in banking, airlines and railways etc for their applications.
Mini: Mini computers are lower to mainframe computers in terms of speed and storage capacity. They are also less expensive than mainframe computers. Some of the features of mainframes will not be available in mini computers.
Micro Computers: The invention of microprocessor (single chip CPU) gave birth to the much cheaper micro computers. They are further classified into
* Desktop Computers
* Laptop Computers
* Handheld Computers(PDAs).
Q. Describe the classification of computers on the basis of construction and working principles.
Analog Computer: An analog computer (spelt analogue in British English) is a form of computer that uses continuous physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved
Digital Computer: A computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system
Hybrid (Analog + Digital): A combination of computers those are capable of inputting and outputting in both digital and analog signals. A hybrid computer system setup offers a cost effective method of performing complex simulations.
Q. Describe the recording method in compact disk.
A molded plastic disc containing digital data that is scanned by a laser beam for the reproduction of recorded sound and other information. Since its commercial introduction in 1982, the audio CD has almost completely replaced the phonograph disc for high-fidelity recorded music. Co invented by Philips Electronics N.V. and Sony Corporation in 1980, the compact disc has expanded beyond audio recordings into other storage-and-distribution uses, notably for computers (CD-ROM) and entertainment systems (videodisc).
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