2024 - BCA [3rd Semester] - Digital Computer Organization - Purnea University

Note: Candidates are required to give the answers in their own words as far as practicable. The questions are of equal value. Answer any five questions.

1. What are the different types of number systems used in digital computing?Explain the conversion between binary, octal and hexadecimal number systems with examples
   
   
2. Discuss the difference between Binary Fixed-Point and Floating-Point representation. How are over-Flow and under-Flow handled in binary arithmetic?
   
   
3. Explain the function of the following logic gates: AND, OR, NOT, XOR and NAND. Draw their truth tables.
   
   
4. What is Demorgan's theorem? How does it simplify Boolean expressions? Provide an example of Boolean algebra simplification using the K-map.
   
   
5. What is the difference between a Half Adder and a Full Adder? Provide the circuit diagram and truth table for both.
   
   
6. Explain the working of different types of Flip-Flops: RS, D, JK and T. How are they used in sequential circuits?
   
   
7. What are the main differences between isolated I/O and memory-mapped I/O? Describe their advantages and disadvantages.
   
   
8. Explain the concept of synchronous and asynchronous data transfer. How does handshaking ensure proper communication during data transfer?
   
   
9. Describe the memory hierarchy in computer architecture. How do cache memory and virtual memory improve system performance?
   
   
10. What is the purpose of address mapping in memory? Explain the concept of page tables and cache mapping techniques like direct mapping and associative mapping.