| Que. 1 |
an R-S latch is a |
| A |
|
combinatorial ckt |
| B |
|
synchronous sequential ckt |
| C |
|
1-bit memory arrangement |
| D |
|
one clock delay element |
|
| Que. 2 |
Ques 25. in an 8085 microprocessor system the RST instruction will cause
an interrupt |
| A |
|
only if an interrupt service routine is not being executed |
| B |
|
only if a bit in the intreeupt mask is made 0 |
| C |
|
only if interrupts have been enabled by an EI INSTRUCTION |
| D |
|
NONE OF THE ABOVE |
|
| Que. 3 |
the minimum number of two input NAND gate required to iomplement the boolean
function _ Z=ABC,ASSUME that A,Band C are available is |
| A |
|
2 |
| B |
|
3 |
| C |
|
5 |
| D |
|
6 |
|
| Que. 4 |
The threshold level for logic 1 in the TTL family is |
| A |
|
only voltage above 2.5V |
| B |
|
any voltage between 0.8V and 5.0V |
| C |
|
any voltage below 5.0V |
| D |
|
any voltage below V(cc) but above 2.8V |
|
| Que. 5 |
the binary fraction 0.0111 in decimal form is equal to |
| A |
|
0.4375 |
| B |
|
0.6225 |
| C |
|
0.8325 |
| D |
|
0.1105 |
|
| Que. 6 |
in order to add 1111+1101, we required |
| A |
|
one FA,one HA |
| B |
|
three FA |
| C |
|
three FA,one HA |
| D |
|
none of these |
|
| Que. 7 |
A system has a word length of 4-bits.If in this system -ve numbers are
represented by their Two's compliment,then the range of numbers that can
be represented by the word length is |
| A |
|
-8 to +8 |
| B |
|
-7 to +7 |
| C |
|
-16 to +16 |
| D |
|
none of these |
|
| Que. 8 |
The decimal value 0.25 |
| A |
|
is equivalent to binary value 0.1 |
| B |
|
is equivalent to the binary value 0.01 |
| C |
|
is equivalent to the binary value 0.00111 |
| D |
|
cannot be represented precisely in binary |
|
| Que. 9 |
How many boolean functions of 3 variables are there? |
| A |
|
16 |
| B |
|
64 |
| C |
|
256 |
| D |
|
512 |
|
| Que. 10 |
The number of 1s in the binary representation of (3*4096+15*256+5*16+3)
are |
| A |
|
8 |
| B |
|
9 |
| C |
|
10 |