Computer fundamental MCQ Questions and answers- Technical Aptitude

It is an input device. Keyboard, as they mentioned is not an output device basically means an input device. Keyboard in not an output device, it is rather an input device.

The terms could be used to describe the concurrent processing of computer programs, via CRTs, on one computer system, Time-sharing, Online processing, Interactive processing.

Cache memory, also called cache, supplementary memory system that temporarily stores frequently used instructions and data for quicker processing by the central processing unit (CPU) of a computer. The cache augments and is an extension of a computer's main memory.

A communications satellite is an artificial satellite that relays and amplifies radio telecommunications signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth.

The most reliable data a systems analyst may obtain are gathered through observation. They are free of most of the biases that may color data acquired through other sources. Information received through interviews requires verification. People may not lie deliberately, but very often they misrepresent facts.

Data transfer is greater than magnetic tape. In this, the data can be updated when required. Its storage capacity is very high. It is a non-volatile storage device in which the stored data remains intact even after the power supply is turned off.

An advantage of blocking a tape is that less tape is used to store the same amount of data . Tape storage is a system in which magnetic tape is used as a recording media to store data. With data volumes growing rapidly worldwide, tape storage is the most suitable system for data storage requiring large capacity.

Punched paper tape is a form of perforated paper that was historically used as an input or output medium in early computing and telecommunication systems.

It stores data using patterns of holes punched in specific positions across the width of the tape, each row representing a character or instruction.

Paper tape (Option A) is a general term and may not explicitly refer to the punched version.

Magnetic tape is a different storage medium that uses magnetic signals, not perforations.

Card punch refers to punched cards, not tapes.

Therefore, the correct and most specific term for perforated paper used as input or output media is punched paper tape.

The byte capacity of a drum which is 5 inch high, 10 inch diameter, and which has 60 tracks per inch and bit density of 800 bits per inch,
Total capacity = (areal density) x (total surface area)
Areal density = 60 x 800 = 48000 bits per inch
Total surface area = 2πrh = 2 × π × 5 × 5 = 50π
Total capacity = $$\frac{{\left( {50 \times 3.14 \times 48000} \right)}}{8}$$     = 942000 bytes.

Ethernet generally uses Bus Topology. Ethernet operates in two layers of the OSI model, Physical Layer, and Data Link Layer. For Ethernet, the protocol data unit is Frame since we mainly deal with DLL. In order to handle collision, the Access control mechanism used in Ethernet is CSMA/CD.