Explanation

Good voice reproduction via PCM can be achieved with 128 quantization levels, or 7-bit coding (27 = 128). A voice signal, conservatively, occupies a bandwidth of 4 kHz. 

Explanation

A baseband signal can be transmitted over a pair of wires (like in a telephone), coaxial cables, or optical fibers

Explanation

Coaxial cable supports both analog and digital signals. Consists of two conductors with construction that allows it to operate over a wider range of frequencies compared to twisted pair

Explanation

 The basic building block of any communications facility is the transmission line. Frame relay networks are commonly used for terminal-to-computer and computer-to-computer communications.

Explanation

A paintbrush is a brush used to apply paint or ink.

Java, COBOL, C++ etc. are computer languages. 

Explanation

A supercomputer is a computer that performs at or near the currently highest operational rate for computers.

Explanation

The point and draw device is an input system that helps to point and select an icon to be shown on the screen quickly.

A mouse is a point-and-draw device.

Explanation

MS-Excel comments are used to add a note or explain an action in a cell.

Explanation

• software in computer can:
• enhance the quality of hardware,
• increase spending on CPU,
• increase computer security
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• Alan Turing is credited with being the first person to come up with a theory for software in 1935,
• The history of software and its development can be traced to the early nineteenth century. 
  
The history of software development began in England in 1948

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• Software is a set of instructions, data, or programs used to operate computers and execute specific tasks.
  
• It is the opposite of hardware
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• Graphical representation is Software in Computer technology
  

Explanation

Non – numeric data is any form of data that is measured in non-number  form.

It makes use of symbols and letters.

Such data can only be identified in a word format.

For example, employee address, date of birth, name, etc.