CS302 Midterm Online Quiz

CS302-Midterm

1 / 50

A BCD to 7-Segment decoder has

7 inputs and 3 outputs

4 inputs and 7 outputs

3 inputs and 7 outputs

inputs and 4 outputs

2 / 50

Tri-State Buffer is basically a/an _________ gate.

NOT

AND

XOR

3 / 50

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

111

1111

1001

110

4 / 50

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

1000

1010

1100

5 / 50

Demultiplexer has

Multiple inputs and single output.

Single input and multiple outputs.

Single input and single outputs.

Multiple inputs and multiple outputs.

6 / 50

Which one is true:

Power consumption of TTL is higher than of CMOS

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

Both TTL and CMOS have same power consumption

Power consumption of CMOS is higher than of TTL

7 / 50

TTL based devices work with a dc supply of ____ Volts

3.35.

8 / 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 ________.

Invalid

Clear

SET

RESET

9 / 50

If we multiply “723” and “34” by representing them in floating point notation i.e. by first, converting them in floating point representation and then multiplying them, the value of mantissa of result will be ________

2.4582

24.582

24582

0.24582

10 / 50

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

TRUE

FALSE

11 / 50

A BCD to 7-Segment decoder has

3 inputs and 7 outputs

4 inputs and 7 outputs

7 inputs and 3 outputs

7 inputs and 4 outputs

12 / 50

"Sum-of-Weights" method is used __________

to convert from one number system to other

to decode data

to convert from serial to parralel data

to encode data

13 / 50

A.(B.C) = (A.B).C is an expression of __________

Associative Law

Commutative Law

Demorgan‟s Law

Distributive Law

14 / 50

The ABEL symbol for “XOR” operation is

15 / 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.

One

Zero

Undefined

10 (binary)

16 / 50

A latch has _____ stable states

One

Two

Four

Three

17 / 50

Which one is true:

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

Power consumption of CMOS is higher than of TTL

Both TTL and CMOS have same power consumption

Power consumption of TTL is higher than of CMOS

18 / 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.

One

Undefined

Zero

19 / 50

The binary value “1010110” is equivalent to decimal __________

20 / 50

The binary value “11011” is equivalent to __________

E2.

21 / 50

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

0.9 V

3.3 V

0.5 V

0.3 V

22 / 50

The _______ Encoder is used as a keypad encoder.

2-to-8 encoder

BCD-to-Decimal

Decimal-to-BCD Priority

4-to-16 encoder

23 / 50

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

A & B

A $ BL-21

A ! B

A # B

24 / 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

>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

25 / 50

Sequential circuits have storage elements

FALSE

TRUE

26 / 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

RESET

SET

Invalid

27 / 50

The Quad Multiplexer has _____ outputs

28 / 50

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

29 / 50

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

30 / 50

A particular Full Adder has

2 inputs and 3 output

2 inputs and 2 output

3 inputs and 2 output

3 inputs and 3 output

31 / 50

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

1100

1000

1010

32 / 50

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

FALSE

TRUE

33 / 50

NOR gate is formed by connecting _________

NOT Gate and then OR Gate

OR Gate and then NOT Gate

AND Gate and then OR Gate

OR Gate and then AND Gate

34 / 50

In the Karnaugh map shown above, which of the loops shown represents a legal grouping?

35 / 50

The PROMconsists of a fixed non-programmable ____________ Gate array configured as a decoder.

NOT

XOR

AND

36 / 50

The binary value of 1010 is converted to the product term

TRUE

FALSE

37 / 50

The ABEL symbol for “OR” operation is

38 / 50

The binary value “1010110” is equivalent to decimal __________

39 / 50

The diagram given below represents __________

Sum of product form

Associative law

Product of sum form

Demorgans law

40 / 50

"Sum-of-Weights" method is used __________

to convert from one number system to other

to decode data

to convert from serial to parralel data

to encode data

41 / 50

A latch retains the state unless

Output is changed

Power is turned off

Clock pulse is changed

Input is changed

42 / 50

The 3-variable Karnaugh Map (K-Map) has _______ cells for min or max terms

43 / 50

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

2-input, 4-bit

4-input, 8-bit

4-input, 16-bit

2-input, 8-bit

44 / 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=0,A<B=1,A=B=0

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

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

45 / 50

Following is standard POS expression

TRUE

FALSE

46 / 50

The 3-variable Karnaugh Map (K-Map) has _______ cells for min or max terms

47 / 50

Demultiplexer has

Single input and multiple outputs.

Multiple inputs and multiple outputs.

Multiple inputs and single output.

Single input and single outputs.

48 / 50

The output of an AND gate is one when _______

Any of the input is one

Any of the input is zero

All the inputs are zero

All of the inputs are one

49 / 50

The maximum number that can be represented using unsigned octal system is _______

50 / 50

The Quad Multiplexer has _____ outputs

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