Question 1

What is the indication of a short to ground in the output of a driving gate?

Accepted Answer

A) only the output of the defective gate is affected 
B) there is a signal loss to all load gates 
C) the node may be stuck in either the high or the low state 
D) the affected node will be stuck in the high state 
A) only the output of the defective gate is affected 
B) there is a signal loss to all load gates 
C) the node may be stuck in either the high or the low state 
D) the affected node will be stuck in the high state B

Question 2

The full subtractor can be implemented using

Accepted Answer

A) two xor and an or gates 
B) two half subtractors and an or gate 
C) two multiplexers and an and gate 
D) two comparators and an and gate 
A) two xor and an or gates 
B) two half subtractors and an or gate 
C) two multiplexers and an and gate 
D) two comparators and an and gate B

Question 3

Half-adders have a major limitation in that they cannot______________

Accepted Answer

A) accept a carry bit from a present stage 
B) accept a carry bit from a next stage 
C) accept a carry bit from a previous stage 
D) accept a carry bit from the following stages 
A) accept a carry bit from a present stage 
B) accept a carry bit from a next stage 
C) accept a carry bit from a previous stage 
D) accept a carry bit from the following stages C

Question 4

A digital system consists of____________types of circuits.

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
A) 2 
B) 3 
C) 4 
D) 5

Question 5

In a sequential circuit, the output at any time depends only on the input values at that time.

Accepted Answer

A) past output values 
B) intermediate values 
C) both past output and present input 
D) present input values 
A) past output values 
B) intermediate values 
C) both past output and present input 
D) present input values

Question 6

How many AND, OR and EXOR gates are required for the configuration of full adder?

Accepted Answer

A) 1, 2, 2 
B) 2, 1, 2 
C) 3, 1, 2 
D) 4, 0, 1 
A) 1, 2, 2 
B) 2, 1, 2 
C) 3, 1, 2 
D) 4, 0, 1

Question 7

If the two numbers are unsigned, the bit conditions of interest are the____________carry and a possible____________ result.

Accepted Answer

A) input, zero 
B) output, one 
C) input, one 
D) output, zero 
A) input, zero 
B) output, one 
C) input, one 
D) output, zero

Question 8

If A, B and C are the inputs of a full adder then the carry is given by______________

Accepted Answer

A) a and b or (a or b) and c 
B) a or b or (a and b) c 
C) (a and b) or (a and b)c 
D) a xor b xor (a xor b) and c 
A) a and b or (a or b) and c 
B) a or b or (a and b) c 
C) (a and b) or (a and b)c 
D) a xor b xor (a xor b) and c

Question 9

The design of an ALU is based on______________

Accepted Answer

A) sequential logic 
B) combinational logic 
C) multiplexing 
D) de-multiplexing 
A) sequential logic 
B) combinational logic 
C) multiplexing 
D) de-multiplexing

Question 10

Let the input of a subtractor is A and B then what the output will be if A = B?

Accepted Answer

A) 0 
B) 1 
C) a 
D) b 
A) 0 
B) 1 
C) a 
D) b

Question 11

For the device shown here, assume the D input is LOW, both S inputs are LOW and the input is LOW. What is the status of the Y' outputs?

Accepted Answer

A) d 
B) a 
C) c 
D) b 
A) d 
B) a 
C) c 
D) b

Question 12

Let A and B is the input of a subtractor then the output will be______________

Accepted Answer

A) a xor b 
B) a and b 
C) a or b 
D) a exnor b 
A) a xor b 
B) a and b 
C) a or b 
D) a exnor b

Question 13

How many outputs are required for the implementation of a subtractor?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 14

What type of logic circuit is represented by the figure shown below?

Accepted Answer

A) xor 
B) xnor 
C) and 
D) xand 
A) xor 
B) xnor 
C) and 
D) xand

Question 15

Total number of inputs in a half adder is

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 1 
A) 2 
B) 3 
C) 4 
D) 1

Question 16

The carry propagation can be expressed as

Accepted Answer

A) cp = ab 
B) cp = a + b 
C) all but y0 are low 
D) all but y0 are high 
A) cp = ab 
B) cp = a + b 
C) all but y0 are low 
D) all but y0 are high

Question 17

Let A and B is the input of a subtractor then the borrow will be______________

Accepted Answer

A) a and b' 
B) a' and b 
C) a or b 
D) a and b 
A) a and b' 
B) a' and b 
C) a or b 
D) a and b

Question 18

The output of a subtractor is given by (if A, B and X are the inputs).

Accepted Answer

A) a and b xor x 
B) a xor b xor x 
C) a or b nor x 
D) a nor b xor x 
A) a and b xor x 
B) a xor b xor x 
C) a or b nor x 
D) a nor b xor x

Question 19

3 bits full adder contains______________

Accepted Answer

A) 3 combinational inputs 
B) 4 combinational inputs 
C) 6 combinational inputs 
D) 8 combinational inputs 
A) 3 combinational inputs 
B) 4 combinational inputs 
C) 6 combinational inputs 
D) 8 combinational inputs

Question 20

In which operation carry is obtained?

Accepted Answer

A) subtraction 
B) addition 
C) multiplication 
D) both addition and subtraction 
A) subtraction 
B) addition 
C) multiplication 
D) both addition and subtraction

What is the indication of a short to ground in the output of a driving gate?

The full subtractor can be implemented using

Half-adders have a major limitation in that they cannot______________

A digital system consists of____________types of circuits.

In a sequential circuit, the output at any time depends only on the input values at that time.

How many AND, OR and EXOR gates are required for the configuration of full adder?

If the two numbers are unsigned, the bit conditions of interest are thecarry and a possible result.

If A, B and C are the inputs of a full adder then the carry is given by______________

The design of an ALU is based on______________

Let the input of a subtractor is A and B then what the output will be if A = B?

For the device shown here, assume the D input is LOW, both S inputs are LOW and the input is LOW. What is the status of the Y' outputs?

Let A and B is the input of a subtractor then the output will be______________

How many outputs are required for the implementation of a subtractor?

What type of logic circuit is represented by the figure shown below?

Total number of inputs in a half adder is

The carry propagation can be expressed as

Let A and B is the input of a subtractor then the borrow will be______________

The output of a subtractor is given by (if A, B and X are the inputs).

3 bits full adder contains______________

In which operation carry is obtained?

Number Systems and Binary Codes

Boolean Algebra

Boolean Algebra and Logic Circuits

Digital Number Systems and Comparators

Digital Comparators, Encoders, and Multiplexers

Digital Circuits and HDL Applications

Understanding Flip-Flop and Sequential Circuits

Registers and Counters in Digital Logic

Sequential Circuits and Fault Detection Techniques

Ram, Memory, and Storage Technology

Transmission, Memory and PLDS

Programmable Logic Devices PLDS and Field-Programmable Gate Arrays FPGAS

Filters

Exam 4: Logic Circuit and Arithmetic Unit

What is the indication of a short to ground in the output of a driving gate?

The full subtractor can be implemented using

Half-adders have a major limitation in that they cannot______________

A digital system consists of____________types of circuits.

In a sequential circuit, the output at any time depends only on the input values at that time.

How many AND, OR and EXOR gates are required for the configuration of full adder?

If the two numbers are unsigned, the bit conditions of interest are the____________carry and a possible____________ result.

If A, B and C are the inputs of a full adder then the carry is given by______________

The design of an ALU is based on______________

Let the input of a subtractor is A and B then what the output will be if A = B?

For the device shown here, assume the D input is LOW, both S inputs are LOW and the input is LOW. What is the status of the Y' outputs?

Let A and B is the input of a subtractor then the output will be______________

How many outputs are required for the implementation of a subtractor?

What type of logic circuit is represented by the figure shown below?

Total number of inputs in a half adder is

The carry propagation can be expressed as

Let A and B is the input of a subtractor then the borrow will be______________

The output of a subtractor is given by (if A, B and X are the inputs).

3 bits full adder contains______________

In which operation carry is obtained?

Number Systems and Binary Codes

Boolean Algebra

Boolean Algebra and Logic Circuits

Digital Number Systems and Comparators

Digital Comparators, Encoders, and Multiplexers

Digital Circuits and HDL Applications

Understanding Flip-Flop and Sequential Circuits

Registers and Counters in Digital Logic

Sequential Circuits and Fault Detection Techniques

Ram, Memory, and Storage Technology

Transmission, Memory and PLDS

Programmable Logic Devices PLDS and Field-Programmable Gate Arrays FPGAS

Filters

If the two numbers are unsigned, the bit conditions of interest are thecarry and a possible result.