GSM Interfacing with 8051 Microcontroller

Scrolling message on a 16x8 LED dot matrix display

Question bank for DTE 2015

1. Convert the following
2. Covert the following
(569)10 = (?)2
      = (?)8
     
(45F)16   = (?)2
       = (?)8
(567)8  = (?)2
      = (?)16
     
(1010101)2 = (?)16
             = (?)8
3. Find the 2’s complement of the following
a. (1110010101)2
b. (98)10
4. Draw the symbol, write equation, and truth table for all basic gates
5. Draw the symbol, write equation, and truth table for XOR and XNOR gates
6. Draw the symbol, write equation, and truth table for Universal gates
7. NAND and NOR are called as universal gates, prove by using NAND gates by deriving all the basic
gates.
8. Perform BCD operation for the following
a. (56)10 – (39)10
b. (29)10 + (97)10
9. State, write equation, draw logic diagram and prove, first De Morgan’s theorem using truth
table.
10. State, write equation, draw logic diagram and prove, second De Morgan’s theorem using truth
table.
11. Subtract the following using 1’s complement subtraction method
a. (69)10 – (87)10
b. (86)10 – (34)10
12. Convert the following
a. (4765)8 = (?)10
b. (CF9)16 = (?)10
13. Subtract the following using 2’s complement subtraction method
c. (59)10 – (67)10
d. (69)10 – (48)10
14. Draw the logic diagram for the equation given below
Y = ABC + ABC + ABC + (A+B+C) + (A+B+C)
15. Perform Binary operation for the following
a. (1011)2 + (1101)2
b. (11010)2 – (10101)2
c. (101)2 x (110)2
d. (1110101)2 / (110)2
16. Perform Binary operation for the following
e. (13)10 + (49)10
f. (27)10 – (23)10
g. (14)10 x (06)10
h. (59)10 / (6)10
17. Draw the logic diagram for the equation given below
Y = ABC + ABC + ABC + (A+B+C) + (A+B+C)