Number Systems - introduction, conversion between number systems, digital codes, weighted binary code, non-weighted binary code, alphanumeric code, error detection and error correction codes - One Line Questions

1. In an even parity system, a data word with three '1's would require a parity bit of: — 1
2. In an odd parity system, a data word with two '1's would require a parity bit of: — 1
3. What is the BCD representation of the decimal number 5? — 0101
4. What is the Excess-3 code for the decimal digit 5? — 1000
5. What is the 2421 BCD representation of the decimal number 7? — 1001
6. What is the binary representation of the hexadecimal digit 'B'? — 1011
7. Convert the decimal number 25 to its binary representation. — 11001
8. What is the Gray Code representation of the binary number 1011? — 1101
9. What is the decimal equivalent of the hexadecimal number A5? — 166
10. What is the base of the decimal number system? — 10
11. What is the base of the binary number system? — 2
12. Convert the decimal number 150 to its octal representation. — 226
13. What is the decimal equivalent of the octal number 345? — 230
14. What is the decimal equivalent of the 2421 BCD code 0110? — 6
15. How many bits are typically used in the standard ASCII code? — 7
16. What is the decimal equivalent of the Excess-3 code 1011? — 5
17. What is the ASCII code for the uppercase letter 'A'? — 65
18. What is the decimal equivalent of the BCD code 0110 1001? — 69
19. Which of the following is an example of a non-weighted binary code? — Gray Code
20. Which of the following is a weighted binary code where each bit has a specific place value? — 8421 BCD
21. What is the decimal equivalent of the binary number 1011? — 11
22. What is a 'non-weighted' binary code? — A code where bit positions do not have a fixed positional value
23. What is a 'weighted' binary code? — A code where each bit position has a specific weight or significance
24. What is EBCDIC? — An 8-bit alphanumeric character encoding
25. What is a key characteristic of the Gray Code? — Adjacent codes differ by only one bit
26. What does ASCII stand for? — American Standard Code for Information Interchange
27. What is a 'parity bit'? — An extra bit added to a data word to make the total number of 1s either even or odd
28. Which of the following is a widely used alphanumeric code standard? — ASCII
29. What does 'BCD' stand for in the context of binary codes? — Binary Coded Decimal
30. Convert the decimal number 200 to its hexadecimal representation. — C8
31. Which number system is most commonly used directly by computer hardware? — Binary
32. What is the fundamental difference between error detection and error correction codes? — Detection identifies errors; correction fixes them
33. What is the hexadecimal representation of the binary number 1111? — F
34. Which of the following is an example of a weighted binary code? — 8421 BCD Code
35. Which type of binary code is often used in rotary encoders? — Gray Code
36. Which of the following is a type of error correction code? — Hamming Code
37. What is a limitation of simple parity checking? — It cannot detect if two bits are flipped
38. What is the purpose of the '2421' in the 2421 BCD code? — It indicates the weights of the bit positions (2, 4, 2, 1)
39. What is the primary advantage of using hexadecimal representation in computing? — It provides a more compact representation of binary data
40. The hexadecimal number system is often preferred for representing memory addresses because: — It offers a more compact representation of binary numbers
41. How does a Hamming code typically differ from a simple parity check? — It uses multiple parity bits to pinpoint error locations
42. In the binary number system, what do the digits '0' and '1' represent? — All of the above
43. What is the main advantage of using a non-weighted code like Gray Code in certain applications? — Minimizes errors during transitions between states
44. Which number system uses digits 0-9 and letters A-F? — Hexadecimal
45. Which of the following is a common method for error detection? — Parity Check
46. What is the primary goal of error correction codes (ECC)? — To detect and correct errors in data automatically
47. What is the primary goal of error detection codes? — To identify if errors have occurred during data transmission or storage
48. What is the purpose of alphanumeric codes? — To represent both letters and numbers in a digital system
49. What is the primary function of a number system in computing? — To represent data and instructions in a format the computer can process
50. What is the primary role of alphanumeric codes in computing? — To represent textual information
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