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?

<p>It can only represent 16 possible characters (A)</p> Signup and view all the answers

How was the BCD code extended to represent more characters?

<p>By using a 6-bit code to represent 64 characters (C)</p> Signup and view all the answers

What does ASCII stand for?

<p>American Standard Code for Information Interchange (C)</p> Signup and view all the answers

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

<p>ASCII assigns a unique pattern of bits to each character, while BCD represents each decimal digit independently (D)</p> Signup and view all the answers

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

<p>ASCII can represent a wider range of characters, including alphabets, digits, and symbols (C)</p> Signup and view all the answers

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

<p>EBCDIC (C)</p> Signup and view all the answers

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

<p>To enable transfer of data between different computers (B)</p> Signup and view all the answers

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