Question: Choose the correct answer. Which one of the following expressions represents the DeMorgan theorem? Select one: a. none of the given options b. (A+B)'=A'B' c. (X')'=X d. X+X=X 2. The parity...



Question: Choose the correct answer.









  1. Which one of the following expressions represents the DeMorgan theorem?




    Select one:


    a. none of the given options

    b. (A+B)'=A'B'

    c. (X')'=X

    d. X+X=X







2. The parity bit that is added to a binary number is equal to
1 if the number of ones is more than the number of zeros.


Select one:





True

False










3.(754)10is equal to(111101100)BCD.








Select one:


True

False


4. In a
4 by 2 standard encoder, if the input is1001, then the output should be

Select one:


a. Invalid input

b. 10

c. 01

d. none of the given choices


5. The 2’s complement of the binary number
(1100100)2
 is:

Select one:




a. (0011100)2

b. (0010011)2

c. (1101100)2

d. None of the given options


6. What will be the output of the 4-to-1 Multip
lexer if the input is 0110 and the Selector is 10?

Select one:


a. none of the given options

b. 0

c. 1

d. 10


7.  The Term C'B'D in the simplified boolean expression for F(D, C, B, A) = ∑ (0, 2, 5, 7, 8, 9, 10, 13, 15) is an essential  prime implicant

Select one:


True

False


8.  When constructing the state table, the output always depends on

Select one:


a. The Present state

b. The inputs

c. The next state

d. none of these


9.  The complement of the maxterm j is equivalent to the minterm j.

Select one:


True

False


10. To correct BCD addition in binary, we must add.

Select one:


a. none of the given options

b. 0110 if the sum <>

c. 0110 if the sum >1000

d. Add carry

e. 0110 if the sum > 1001


11.  If the Boolean function
F(A,B,C)=∑(0,1,2,5) is implemented using a 4 to 1 line multiplexer, and the input was010 what is the output will be?

Select one:


a. none of the given options

b. 1

c. 0

d. 0135


12.  When constructing the state table to design a sequential circuit, the Flip-Flop inputs are found from the present and next state and using :

Select one:


a. the truth tables

b. none of the given options

c. the state tables

d. the excitation tables


13.  The minimum number of decoders required to implement three Boolean functions F1, F2, and F3 is:

Select one:


a. 1

b. 0

c. 2

d. none of the given options


14.  There is only one simplified boolean expression for each k-map

Select one:


True

False


15. To design a sequential circuit with 5 states, the minimum number of Flip-Flops required is :

Select one:


a. 2

b. 3

c. 1

d. none of the given options


16.  What is the maximum positive signed number that can be represented in8 bits?

Select one:




a. 127

b. 255

c. 128

d. none of the given options


17.  The combinational circuit that converts binary information from
n coded inputs to a maximum2ndecoded outputs, (unique output lines) is called:

Select one:


a. Multiplexer

b. Priority Encoders.

c. none of the given options

d. Binary Decoder


18. From the types studied, the Flip-Flop type that is expected to require the least gates to implement any design generally is

Select one:


a. None of the given options

b. SR

c. D

d. JK

e. T


19.  What will be the output of the
4-to-2 standard Encode
r if the input is0010?

Select one:


a. 00

b. 10

c. 01

d. none of the given options


20.  In a JK Flip-Flop, if the present state is 1, and the next state is 1 , then the inputs must be:

Select one:


a. J=1

b. J=0

c. J=1 and K=0

d. none of the given options

e. K=1


21. The number of columns in the state table required to be simplified when designing  a  4 bit counter using JK Flip Flops is:

Select one:


a. 4

b. 2

c. 8

d. None of the given options



22.  ASCII code is used to represent alphabetical characters as a weighted binary number.

Select one:




True

False


23. The simplified POS of the Boolean expression F(A,B,C,D) = A’B’C’ + B’CD’ + A’BCD’ + AB’C’+ A’BC’ is:

Select one:


a. A’C’+B’C'+A’D’+B’D'

b. none of these

c. (A’+C’)(B’+C')(A’+D’)(B’+D')

d. (A'+B')(C'+D')


24.  Which of the following can be used to implement an 8-bit full adder with no input carry?

Select one:


a. Seven full adders and one half adder

b. All of the given options

c. Four 2 bit adders

d. Eight full adders


25.  In any Flip-Flop, if the clock is not triggered, the output is expected to become;

Select one:


a. none of the given options

b. 0

c. equal to the previous value

d. 1


26. Which one of the following combinational circuits functions as ‘Selector’?

Select one:


a. Multiplexer

b. Binary Encoder

c. None of the given choices.

d. Binary Decoder

e. Demultiplexer




































































Jun 05, 2022
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