HSC ICT Chapter 3 : Comprehension Based Questions & Answers

Number System:

  1. “All digits are numbers but all numbers are not digits”- Explain.
  2. “Tally is a non-positional number system”- Explain.
  3. Why is the number (11)10 called a positional number? [Jessore Board-2017]
  4. What kind of number is 10101 in the number system? Explain
  5. What type of number is 988 in the number system? Explain.
  6. What kind of number is 5D? Explain [Cumilla Board-2017]
  7. Is the number (298)8 correct?- Explain. [Sylhet Board-2016]
  8. Explain the base of the number system.
  9. Explain the 3-based number system. [A-Set: Dhaka, Jessore, Sylhet and Dinajpur Board-2018]
  10. “Binary number system is compatible with the working of internal components of computer”- Explain.
  11. Explain the number system used in digital devices. [Dinajpur Board-2019]
  12. Explain the importance of binary number system in digital devices. [Cumilla Board-2016]
  13. The number (267)10 is not directly accepted by the computer – explain. [Chittagong Board-2016]
  14. Why are digital signals useful in computers? Explain
  15. Write the difference between bit and byte.
  16. How do you differentiate between hexadecimal and decimal number systems?
  17. “Octal 3-bit Code”- Explain. [Dinajpur Board-2016]
  18. “Hexadecimal  4-bit code”- Explain.
  19. “The next number of 1 can be 10” – Explain.
  20. “The next number of 77 can be 100” – Explain.
  21. “The next number of FF can be 100” -Explain. [Barisal Board-2019]
  22. “It can be F+1=10” – Explain.
  23. Is 9+7=10 possible? Explain [Comilla Board-2019]
  24. Why 3+5=10? – Explain. [Chittagong Board-2017]
  25. “It can be A+7=11 ” – Explain.
  26. “It can be 6+5+3=1110” – Explain. [Dhaka Board-2019]
  27. What do you mean by signed number? Explain [Madrasa Board-2016]
  28. Discuss the importance of 2’s complement form. [B-Set: Rajshahi, Cumilla, Chittagong & Barisal Board-2018, Dinajpur Board-2017]
  29. “2’s complement simplifies digital circuits” – Explain. [Rajshahi Board-2019]
  30. Explain the operation of subtraction possible by addition. [Rajshahi Board-2016]
  31. “2’s complement changes only the sign of the number”-Explain. [Sylhet Board-2019]
  32. Which of the BCD and binary number equivalent to (14)10 requires more bits? Explain. [Barisal Board-2017]
  33. “BCD is not a number system”- Explain.
  34. Why is BCD written in 4-bit? Explain
  35. Explain the most commonly used alphanumeric code before Unicode. [Dhaka Board-2017]
  36. “Unicode is a blessing for all the speaking people of the world”-Explain. [Chittagong Board-2017]
  37. “Unicode Universal Code” – Explain.
  38. Unicode can understand ‘Bangla’ language – explain. [Dhaka Board-2019]
  39. Describe the code used to encode all the world’s languages ​​by computer.
  40. “It has been possible to coded all the languages ​​of the world”- Explain. [Jessore Board-2019]
  41. “Unicode is compatible with ASCII Code” – Explain.
  42. Write the difference between BCD and EBCDIC.
  43. Write the difference between ASCII and Unicode.

Digital Device:

  1. “1+1+1=1” –Explain.
  2. “T+T=T” – Explain.
  3. “A+1=1”- Explain.
  4. In which argument 1+1=1 and 1+1=10 can be written? –Explain.
  5. Binary 1+1 and Boolean 1+1 are not same. –Explain.
  6. “Binary addition and Boolean addition are not same”-Explain.
  7. Why truth table is used?
  8. Describe De-Morgan’s theorem for n number of variables.
  9. “If any one of the inputs is false in AND gate, Output becomes false”- Explain.
  10. AND gate indicates logical multiplication. Explain.
  11. OR gate indicates logical addition. Explain.
  12. Output of a logic gate is inverse to the given input. Explain.
  13. “X-OR gate is a combinational logic gate of all basic gates”-Explain.
  14. Which basic gates are used in implementing X-OR gate? Explain.
  15. Explain the advantages of XOR over OR gate.
  16. What will be the output of XOR gate if an input is 1 and another is A?
  17. Implement X-OR gate using only NAND gates.
  18. Which gates are called universal gate?
  19. “NAND gate is called universal gate”-Explain.
  20. “NOR gate is called universal gate”-Explain.
  21. Bulb is not lightened if two switches are ON- Explain in case of logic gate.
  22. What do you understand by combinational circuit?
  23. Computer performs all the calculations using only one method. Explain.
  24. Explain the circuit that converts human comprehensible language into machine comprehensible language.
  25. Explain the circuit that converts machine comprehensible language into human comprehensible language.
  26. Encoder is the inverse of the decoder. Explain.
  27. “There are four flip-flops in a 4-bit register”-Explain.


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