The two numbers represented in signed 2’s complement form are P=11101101 and Q=11100110. If Q is subtracted from P, the value obtained in signed 2’s complement form is

1.  100000111

2.  00000111

3.  11111001

4.  111111001.

View Answer  
4
Correct Answer :

00000111


Explanation :
No Explanation available for this question

Which of the following Boolean expression correctly represents the relation between P,Q,R and M1

1.  M=(P OR Q)X OR R

2.  M1=(P AND Q)X OR R

3.  M=(P NOR Q)X OR R

4.  M1=(PX OR Q)X OR R

View Answer  
4
Correct Answer :

M1=(PX OR Q)X OR R


Explanation :
No Explanation available for this question

For the circuit shown in the figure, D has transition from 0 to 1 after CLK changes from 1 to 0. Assume gate delays to be negligible. Which of the following statements is true

1.  Q goes to 1 at the CLK transition and stays at 1.

2.  Q goes to 0 at the CLK transition and stays at 0

3.  Q goes to 1 at the CLK transition and goes to 0 when D goes to 1

4.  Q goes to 0 at the CLK transition and goes to 1 when D goes to 1.

View Answer  
4
Correct Answer :

Q goes to 1 at the CLK transition and goes to 0 when D goes to 1


Explanation :
No Explanation available for this question

In the following circuit, the comparator output is logic “1”if V1>V2 and is logic “0” otherwise. The D/A conversion is done as per the relation Where b3(MSB), b2,b1 and b0(LSB) are the counter outputs. The counter starts from the clear state. The stable reading of the LED display is

1.  06

2.  07

3.  12

4.  13.

View Answer  
4
Correct Answer :

13.


Explanation :
No Explanation available for this question

In the following circuit, the comparator output is logic “1”if V1>V2 and is logic “0” otherwise. The D/A conversion is done as per the relation Where b3(MSB), b2,b1 and b0(LSB) are the counter outputs. The counter starts from the clear state. The magnitude of the error between VDAC and Vin at steady state in volts is

1.  0.2

2.  0.3

3.  0.5

4.  1.0

View Answer  
4
Correct Answer :

0.5


Explanation :
No Explanation available for this question

What are the minimum number of 2-to-1 multiplexers required to generate a 2-input AND gate and a 2-input EX-OR gate

1.  1 and 2

2.  1 and 3

3.  1 and 1

4.  2 and 2.

View Answer  
4
Correct Answer :

1 and 2


Explanation :
No Explanation available for this question

Refer to the NAND and NOR latches shown in the figure. The inputs(P1,P2) for both the latches are first made (0,1) and then, after a few seconds, made (1,1). The corresponding stable outputs(Q1,Q2) are

1.  NAND : first(0,1) then (0,1) NOR : first (1,0) then (0,0)

2.  NAND : first (1,0) then (1,0) NOR : first (1,0) then (1,0)

3.  NAND : first (1,0) then (1,0) NOR : first (1,0) then (0,0)

4.  NAND : first (1,0) then (1,1) NOR : first (0,1) then (0,)

View Answer  
4
Correct Answer :

NAND : first (1,0) then (1,0) NOR : first (1,0) then (0,0)


Explanation :
No Explanation available for this question

What are the counting states (Q1,Q2) for the counter shown in the figure below

1.  11, 10, 00, 11, 10,….

2.  01, 10, 11, 00, 01,…

3.  00, 11, 01, 10, 00,…

4.  01, 10, 00, 01, 10,…

View Answer  
4
Correct Answer :

11, 10, 00, 11, 10,….


Explanation :
No Explanation available for this question

Two products are sold from a vending machine, which has two push buttons P1 and P2. When a button is pressed, the price of the corresponding product is displayed in a 7-segment display. If no buttons are pressed, ‘0’ is displayed, signifying ‘RS. 0’. If only P1 is pressed, ‘2’ is displayed, signifying’ RS. ‘2’. If only P1 is pressed, ‘5’ is displayed, signifying’ RS. ‘5’. If both P1 and P2 is pressed, ‘E’ is displayed, signifying ’Error’ The names of the segments in the 7-segment display and the glow of the display for ‘0’, ‘2’ ‘5’ and ‘E’, are shown below. Consider i) Push button pressed/not pressed is equivalent to logic 1/0 respectively. ii) A segment glowing/not glowing in the display is equivalent to logic 1/0 respectively. If segment a tog are considered as functions of P1 and P2, then which of the following is correct

1.  

2.  g=P1+P2, d=c+e

3.  

4.  .g=P1+P2, e=b+c.

View Answer  
4
Correct Answer :

g=P1+P2, d=c+e


Explanation :
No Explanation available for this question

Two products are sold from a vending machine, which has two push buttons P1 and P2. When a button is pressed, the price of the corresponding product is displayed in a 7-segment display. If no buttons are pressed, ‘0’ is displayed, signifying ‘RS. 0’. If only P1 is pressed, ‘2’ is displayed, signifying’ RS. ‘2’. If only P1 is pressed, ‘5’ is displayed, signifying’ RS. ‘5’. If both P1 and P2 is pressed, ‘E’ is displayed, signifying ’Error’. The names of the segments in the 7-segment display and the glow of the display for ‘0’, ‘2’ ‘5’ and ‘E’, are shown below. Consider i) Push button pressed/not pressed is equivalent to logic 1/0 respectively. ii)A segment glowing/not glowing in the display is equivalent to logic 1/0 respectively. What are the minimum numbers of NOT gates and 2-input OR gates required to design the logic of the driver for this 7-segment display

1.  3NOT and 4OR

2.  2NOT and 4OR

3.  1NOT and 3OR

4.  2NOT and 3OR

View Answer  
4
Correct Answer :

2NOT and 3OR


Explanation :
No Explanation available for this question
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