FUNDAMENTALS OF COMPUTER

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Braille keyboards and printers use a system where
A
characters are represented by patterns of raised dots that are felt with the persons fingertips
B
information is enlarged on a screen
C
information is read out via a speaker
D
a pointer is moved about on a screen
Explanation: 

Detailed explanation-1: -Braille, universally accepted system of writing used by and for blind persons and consisting of a code of 63 characters, each made up of one to six raised dots arranged in a six-position matrix or cell. These Braille characters are embossed in lines on paper and read by passing the fingers lightly over the manuscript.

Detailed explanation-2: -Braille characters are formed using a combination of six raised dots arranged in a 3 × 2 matrix, called the braille cell. The number and arrangement of these dots distinguishes one character from another.

Detailed explanation-3: -Braille is a system of raised dots that can be read with the fingers by people who are blind or who have low vision. Teachers, parents, and others who are not visually impaired ordinarily read braille with their eyes. Braille is not a language.

Detailed explanation-4: -Braille consists of patterns of raised dots arranged in cells of up to six dots in a 3×2 configuration. Each cell represents a braille letter, numeral or punctuation mark. Some frequently used words and letter combinations also have their own single cell patterns.

Detailed explanation-5: -Braille is a reading and writing system for blind and vision impaired people. It is made up of raised dots that can be ‘read’ by touch. The basic component is a rectangular ‘cell’ of six dots, arranged in two vertical columns of three dots. Each dot arrangement represents a different letter or number.

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