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Optical Scanners: OMR (Optical Mark Reader)

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Optical Scanners: OMR (Optical Mark Reader)

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Questions and Answers

What is the key idea behind the BCD code?

Representing characters using 4-bit binary codes

Representing 64 characters using a 6-bit code

Representing the entire decimal number in binary form

Representing each decimal digit independently in binary form (correct)

What does BCD stand for?

Binary Coded Descriptor

Binary Coded Decimal (correct)

Binary Coded Digit

Binary Coded Data

How many bits are used to represent a single decimal digit in the BCD code?

4 bits (correct)

2 bits

3 bits

5 bits

What is the main limitation of the 4-bit BCD code?

It can only represent 16 possible characters Signup and view all the answers

How was the BCD code extended to represent more characters?

By using a 6-bit code to represent 64 characters Signup and view all the answers

What does ASCII stand for?

American Standard Code for Information Interchange Signup and view all the answers

How does the ASCII code represent characters compared to the BCD code?

ASCII assigns a unique pattern of bits to each character, while BCD represents each decimal digit independently Signup and view all the answers

What is the main advantage of the ASCII code over the BCD code?

ASCII can represent a wider range of characters, including alphabets, digits, and symbols Signup and view all the answers

Which of the following is another character encoding standard mentioned in the text?

EBCDIC Signup and view all the answers

What is the main purpose of character encoding standards like BCD and ASCII?

To enable transfer of data between different computers Signup and view all the answers