Part I (10 marks)

(Attempting all the answers in this part is compulsory)

1. Convert the following Hexadecimal to binary & decimal [4]
1. F8     b.   1A        c.  3B                   d.   ACE
2. Perform binary multiplication on the following                     [2]
1. 1010*101           b.1101*0101
3. Convert the following into decimal                                              [4]
1. 1101010    b. 01.111   c. 1001.00101    d. 1010111

Part II (20 marks)

(Attempt any two questions)

Question1.

1. Explain with logic gate diagram why NAND & NOR gates are called universal gates?                                                [5]
2. Explain Full adder circuit with help of logic gate diagram, truth table, Boolean expression?                                      [5]

1. Draw logic gate diagram of (x+y+z).(xâ€™+y+zâ€™) using basic gates.       [4]
2. Explain what is truth table?                                                 [2]
3. Draw logic gate diagram for the following using NOR gate
1. Pâ€™Qâ€™+PQ+QR                           [4]

Q3

1. Prove that for the following using truth table?                  [4]
1. A.(A+B)=A
2. (A.B).Aâ€™=0
2. Expand the following                                   [3]
• ASCII
• EBCDIC
• ISCII 3. Explain the rule for binary subtraction?                    [3]
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