CS302 Midterm Online Quiz

CS302-Midterm

1 / 50

The Quad Multiplexer has _____ outputs

2 / 50

The diagram given below represents __________

Demorgans law

Sum of product form

Associative law

Product of sum form

3 / 50

A logic circuit with an output consists of ________.

two AND gates, one OR gate

three AND gates, two OR gates, one inverter

two AND gates, two OR gates, two inverters

two AND gates, one OR gate, two inverters

4 / 50

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

5 / 50

The Quad Multiplexer has _____ outputs

6 / 50

The AND Gate performs a logical __________function

Addition

Division

Multiplication

Subtraction

7 / 50

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

1000

1010

1100

8 / 50

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

9 / 50

The Unsigned Binary representation can only represent positive binary numbers

FALSE

TRUE

10 / 50

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

Associative Law

Commutative Law

Distributive Law

Demorgan‟s Law

11 / 50

Half-Adder Logic circuit contains 2 XOR Gates

TRUE

FALSE

12 / 50

The binary value “1010110” is equivalent to decimal __________

13 / 50

Which one is true:

Both TTL and CMOS have same power consumption

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

Power consumption of CMOS is higher than of TTL

Power consumption of TTL is higher than of CMOS

14 / 50

3.3 v CMOS series is characterized by __________ and _________as compared to the 5 v CMOS series.

Low switching speeds, high power dissipation

Fast switching speeds, very low power dissipation

Low switching speeds, very low power dissipation

Fast switching speeds, high power dissipation

15 / 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

16 / 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 = 0

A>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

17 / 50

The _______ Encoder is used as a keypad encoder.

BCD-to-Decimal

2-to-8 encoder

4-to-16 encoder

Decimal-to-BCD Priority

18 / 50

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

19 / 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________.

SET

Invalid

RESET

Clear

20 / 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

21 / 50

A SOP expression is equal to 1 ______________

All the variables in domain of expression are present

At least one variable in domain of expression is present.

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

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

22 / 50

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

NOT

AND

XOR

23 / 50

Demultiplexer has

Multiple inputs and single output.

Single input and single outputs.

Multiple inputs and multiple outputs.

Single input and multiple outputs.

24 / 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 ________

24.582

24582

2.4582

0.24582

25 / 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

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

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

26 / 50

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

0.5 V

0.9 V

0.3 V

3.3 V

27 / 50

The GAL22V10 has ____ inputs

28 / 50

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

24 (2 raise to power 4)

20 (2 raise to power 0)

23 (2 raise to power 3)

21 (2 raise to power 1)

29 / 50

Using multiplexer as parallel to serial converter requires ___________ connected to the multiplexer

A BCD to Decimal decoder

A parallel to serial converter circuit

A counter circuit

A 2-to-8 bit decoder

30 / 50

A standard POS form has __________ terms that have all the variables in the domain of the expression.

Composite

Min

Product

Sum

31 / 50

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

XOR

NOT

AND

32 / 50

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

A & B

A # B

A $ BL-21

A ! B

33 / 50

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

1100

1000

1010

34 / 50

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

35 / 50

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

FALSE

TRUE

36 / 50

A latch retains the state unless

Power is turned off

Input is changed

Output is changed

Clock pulse is changed

37 / 50

In ANSI/IEEE Standard 754 “Mantissa” is represented by 32-bits bits

8-bits

32-bits

16-bits

64-bits

38 / 50

Sequential circuits have storage elements

TRUE

FALSE

39 / 50

The binary value “1010110” is equivalent to decimal __________

40 / 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

10 (binary)

Zero

41 / 50

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

Associative Law

Demorgan‟s Law

Commutative Law

Distributive Law

42 / 50

A latch has _____ stable states

One

Four

Two

Three

43 / 50

(A+B).(A+C) =

AB+C

AC+B

B+C

A+BC

44 / 50

"Sum-of-Weights" method is used __________

to decode data

to convert from one number system to other

to encode data

to convert from serial to parralel data

45 / 50

The binary value “1010110” is equivalent to decimal __________

46 / 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=0,A<B=1,A=B=0

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

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

47 / 50

A BCD to 7-Segment decoder has

7 inputs and 4 outputs

3 inputs and 7 outputs

7 inputs and 3 outputs

4 inputs and 7 outputs

48 / 50

TTL based devices work with a dc supply of ____ Volts

3.35.

49 / 50

The range of Excess-8 code is from ______ to ______

+8 to -7

+9 to -8

-9 to +8

+7 to -8

50 / 50

The diagram given below represents __________

Product of sum form

Sum of product form

Demorgans law

Associative law

Your score is

The average score is 44%