CS302 Midterm Online Quiz

CS302-Midterm

1 / 50

All the ABEL equations must end with ________

“ endl “ (keyword “endl”)

“ $ “ (a dollar symbol)

“ ; “ (a semicolon)

“ . “ (a dot)

2 / 50

The ecimal “8” is represented as using Gray-Code.

1000

1010

1100

3 / 50

The Quad Multiplexer has _____ outputs

4 / 50

2's complement of any binary number can be calculated by

adding 1 to 1's complement

calculating 1's complement and inverting Most significant bit

subtracting 1 from 1's complement.

adding 1's complement twice

5 / 50

The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?

A>B=0,A<B=1,A=B=1

A>B=1,A<B=0,A<B=1

A>B=0,A<B=1,A=B=0

A > B = 1, A < B = 0, A = B = 0

6 / 50

The ecimal “8” is represented as using Gray-Code.

1100

1010

1000

7 / 50

If an active-HIGH S-R latch has a 0 on the S input and a 1 on the R input and then the R input goes to 0, the latch will be________.

Clear

SET

RESET

Invalid

8 / 50

The Quad Multiplexer has _____ outputs

9 / 50

The Unsigned Binary representation can only represent positive binary numbers

FALSE

TRUE

10 / 50

"Sum-of-Weights" method is used __________

to convert from one number system to other

to convert from serial to parralel data

to encode data

to decode data

11 / 50

The GAL22V10 has ____ inputs

12 / 50

Generally, the Power dissipation of _______ devices remains constant throughout their operation.

Power dissipation of all circuits increases with time.

TTL

CMOS 3.5 series

CMOS 5 Series

13 / 50

A particular Full Adder has

3 inputs and 3 output

3 inputs and 2 output

2 inputs and 3 output

2 inputs and 2 output

14 / 50

The binary value of 1010 is converted to the product term

TRUE

FALSE

15 / 50

An S-R latch can be implemented by using _________ gates

NOT, XOR

NAND, NOR

NAND, XOR

AND, OR

16 / 50

A SOP expression is equal to 1 ______________

When one or more product terms in the expression are equal to 0.

At least one variable in domain of expression is present.

When one or more product terms in the expression are equal to 1.

All the variables in domain of expression are present

17 / 50

The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?

>B=1,A<B=0,A=B=0

>B=0,A<B=1,A=B=1

A>B=0,A<B=1,A=B=0

A>B=1,A<B=0,A<B=1

18 / 50

In the binary number “10011” the weight of the most significant digit is ____

20 (2 raise to power 0)

24 (2 raise to power 4)

21 (2 raise to power 1)

23 (2 raise to power 3)

19 / 50

The binary value “1010110” is equivalent to decimal __________

20 / 50

In ABEL the variable „A‟ is treated separately from variable „a‟

TRUE

FALSE

21 / 50

3-to-8 decoder can be used to implement Standard SOP and POS Boolean expressions

FALSE

TRUE

22 / 50

The binary value “1010110” is equivalent to decimal __________

23 / 50

Which one is true:

Both TTL and CMOS have same power consumption

Power consumption of TTL is higher than of CMOS

Power consumption of both CMOS and TTL depends on no. of gates in the circuit

Power consumption of CMOS is higher than of TTL

24 / 50

How many data select lines are required for selecting eight inputs?

25 / 50

The binary value of 1010 is converted to the product term

TRUE

FALSE

26 / 50

The 4-bit 2‟s complement representation of “-7” is _____________

1001

1111

110

111

27 / 50

The ABEL notation equivalent to Boolean expression A+B is:

A & B

A $ BL-21

A # B

A ! B

28 / 50

Sequential circuits have storage elements

TRUE

FALSE

29 / 50

The output of the expression F=A+B+C will be Logic ________ when A=0, B=1, C=1. the symbol‟+‟ hererepresents OR Gate.

10 (binary)

One

Zero

Undefined

30 / 50

Half-Adder Logic circuit contains 2 XOR Gates

FALSE

TRUE

31 / 50

Two 2-bit comparator circuits can be connected to form single 4-bit comparator

FALSE

TRUE

32 / 50

High level Noise Margins (VNH) of CMOS 5 volt series circuits is _____________

0.9 V

0.5 V

0.3 V

3.3 V

33 / 50

The OLMC of the GAL16V8 is _______ to the OLMC of the GAL22V10

Similar with some enhancements

Similar

Depends on the type of PALs input size

Different

34 / 50

The AND Gate performs a logical __________function

Multiplication

Addition

Division

Subtraction

35 / 50

Circuits having a bubble at their outputs are considered to have an active-low output.

FALSE

TRUE

36 / 50

Demultiplexer has

Multiple inputs and single output.

Single input and single outputs.

Multiple inputs and multiple outputs.

Single input and multiple outputs.

37 / 50

The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?

A>B=1,A<B=0,A<B=1

A > B = 1, A < B = 0, A = B = 0

A>B=0,A<B=1,A=B=1

A>B=0,A<B=1,A=B=0

38 / 50

Two 2-input, 4-bit multiplexers 74X157 can be connected to implement a ____ multiplexer.

4-input, 16-bit

2-input, 4-bit

2-input, 8-bit

4-input, 8-bit

39 / 50

GALcan be reprogrammed because instead of fuses __________logic is used in it

None of the given options

E2CMOS

TTL

CMOS+

40 / 50

The 4-variable Karnaugh Map (K-Map) has ______cells for min or max terms

41 / 50

The ABEL symbol for “OR” operation is

42 / 50

The output of the expression F=A+B+C will be Logic ________ when A=0, B=1, C=1. the symbol‟+‟ hererepresents OR Gate.

Zero

Undefined

One

43 / 50

A Demultiplexer is not available commercially.

FALSE

TRUE

44 / 50

A Karnaugh map is similar to a truth table because it presents all the possible values of inputvariables and the resulting output of each value.

TRUE

FALSE

45 / 50

For a 3-to-8 decoder how many 2-to-4 decoders will be required?

46 / 50

A.(B+ C) = A.B + A.C is the expression of

Distributive Law

Associative Law

Demorgan‟s Law

Commutative Law

47 / 50

GAL is an acronym for ________.

General Array Logic

Generic Analysis Logic

Generic Array Logic

Giant Array Logic

48 / 50

A BCD to 7-Segment decoder has

3 inputs and 7 outputs

inputs and 4 outputs

7 inputs and 3 outputs

4 inputs and 7 outputs

49 / 50

Which one is true:

Both TTL and CMOS have same power consumption

Power consumption of CMOS is higher than of TTL

Power consumption of TTL is higher than of CMOS

Power consumption of both CMOS and TTL depends on no. of gates in the circuit.

50 / 50

The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?

>B=1,A<B=0,A=B=0

A>B=0,A<B=1,A=B=0

A>B=1,A<B=0,A<B=1

>B=0,A<B=1,A=B=1

Your score is

The average score is 44%