# Multiple choice question for engineering

## Set 1

1. BiCMOS is an evolved semiconductor technology that integrates two formerly separate semiconductor technologies those of the

a) CMOS and FET

b) MOSFET and CMOS

c) BJT and CMOS

d) BJT and MOSFET

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2. We use BJT in BiCMOS because of its

a) High speed

b) High gain

c) Low output resistance

d) All of the Mentioned

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3. We use CMOS transistor in BiCMOS because of its

a) High input resistance

b) Simple construction

c) Low power logic gates

d) All of the Mentioned

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4. When was BiCMOS technology introduced?

a) 1990

b) 1991

c) 1992

d) 1989

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5. On which technology the Pentium is based?

a) MOSFET

b) CMOS

c) BiCMOS

d) None of the Mentioned

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6. The advantage of BiCMOS circuit is that it gives

a) Large fan-out

b) Large fan-in

c) Small fan-in

d) Small fan-out

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7. How many members a BiCMOS family have?

a) 5

b) 6

c) 7

d) 8

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8. What is LVT logic?

a) Lower threshold voltage

b) Lower supply threshold voltage

c) Lower supply voltage while retaining TTL logic levels

d) All of the Mentioned

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9. What does ALVT mean?

a) All lower supply voltage while retaining TTL logic levels

b) ABT lower supply voltage while retaining TTL logic levels

c) Advanced version of LVT logic

d) None of the Mentioned

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10. The full form of PTL is

a) Pull transistor logic

b) Push transistor logic

c) Pass transistor logic

d) None of the Mentioned

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11. CVSL means

a) Cascode Voltage Switch Logic

b) Cascade Voltage Switch Logic

c) Complementary Voltage Switch Logic

d) None of the Mentioned

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## Set 2

1. Binary coded decimal is a combination of

a) Two binary digits

b) Three binary digits

c) Four binary digits

d) None of the Mentioned

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2. The decimal number 10 is represented in its BCD form as

a) 1010

b) 01010

c) 00010000

d) 001010

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3. Add the two BCD numbers: 1001 + 0100 = ?

a) 1101

b) 00001101

c) 00110011

d) None of the mentioned

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4. Carry out BCD subtraction for (68) – (61) using 10’s complement method.

a) 00000111

b) 01110000

c) 100000111

d) 011111000

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5. Code is a symbolic representation of __________ information.

a) Continuous

b) Discrete

c) binary

d) None of the Mentioned

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6. When numbers, letters or words are represented by a special group of symbols, this process is called

a) Decoding

b) Encoding

c) Coding

d) None of the Mentioned

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7. A three digit decimal number requires ________ for representation in the conventional BCD format.

a) 3 bits

b) 6 bits

c) 12 bits

d) 24 bits

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8. How many bits would be required to encode decimal numbers 0 to 9999 in straight binary codes.

a) 12

b) 14

c) 16

d) 18

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9. The excess-3 code for 597 is given by

a) 100011001010

b) 100010100111

c) 010110010111

d) 010110101101

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10. The decimal equivalent of the excess-3 number 110010100011.01110101 is

a) 970.42

b) 1253.75

c) 861.75

d) None of the Mentioned

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## Set 3

1. In boolean algebra, the OR operation is performed by which properties?

a) Associative properties

b) Commutative properties

c) Distributive properties

d) All of the Mentioned

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2. The expression for Absorption law is given by

a) A+AB = A

b) A+AB = B

c) AB+AA’ = A

d) None of the Mentioned

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3. According to boolean law: A + 1 = ?

a) 1

b) A

c) 0

d) A’

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4. The involution of A is equal to

a) A

b) A’

c) 1

d) 0

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5. A(A + B) = ?

a) AB

b) 1

c) (1 + AB)

d) A

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6. DeMorgan’s theorem states that

a) (AB)’ = A’ + B’

b) (A + B)’ = A’ * B

c) A’ + B’ = A’B’

d) None of the Mentioned

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7. (A + B)(A’ * B’) = ?

a) 1

b) 0

c) AB

d) AB’

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8. Complement of the expression A’B + CD’ is

a) (A’ + B)(C’ + D)

b) (A + B’)(C’ + D)

c) (A’ + B)(C’ + D)

d) (A + B’)(C + D’)

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9. Simplify Y = AB’ + (A’ + B)C

a) AB’ + C

b) AB + AC

c) A’B + AC’

d) AB + A

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10. The boolean function A + BC is a reduced form of

a) AB + BC

b) (A + B)(A + C)

c) A’B + AB’C

d) (A + C)B

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## Set 4

1. The full form of CMOS is

a) Capacitive metal oxide semiconductor

b) Capacitive metallic oxide semiconductor

c) Complementary metal oxide semiconductor

d) None of the Mentioned

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2. The full form of COS-MOS is

a) Complementary symmetry metal oxide semiconductor

b) Complementary systematic metal oxide semiconductor

c) Capacitive symmetry metal oxide semiconductor

d) None of the Mentioned

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3. CMOS is also sometimes referred to as

a) Capacitive metal oxide semiconductor

b) Capacitive symmetry metal oxide semiconductor

c) Complementary symmetry metal oxide semiconductor

d) None of the Mentioned

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4. CMOS technology is used in

a) Inverter

b) Microprocessor

c) Digital logic

d) Both microprocessor and digital logic

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5. Two important characteristics of CMOS devices are

a) High noise immunity

b) Low static power consumption

c) High resistivity

d) Both high noise immunity and low static power consumption

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6. CMOS behaves as a/an

a) Adder

b) Subtracter

c) Inverter

d) Comparator

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7. An important characteristic of a CMOS circuit is the

a) Noise immunity

b) Duality

c) Symmetricity

d) None of the Mentioned

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8. CMOS logic dissipates _______ power than NMOS logic circuits

a) More

b) Less

c) Equal

d) None of the Mentioned

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9. Semiconductors are made of

a) Ge and Si

b) Si and Pb

c) Ge and Pb

d) None of the Mentioned

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10. Which chip was the first RTC and CMOS RAM chip to be used in early IBM computers, capable of storing a total of 64 bytes?

a) The Samsung 146818

b) The Samsung 146819

c) The Motorola 146818

d) The Motorola 146819

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## Set 5

1. A code converter is a logic circuit that

a) Inverts the given input

b) Converts into decimal number

c) Converts data of one type into another type

d) None of the Mentioned

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2. Use the weighting factors to convert the following BCD numbers to binary:

0101 0011 & 0010 0110 1000

a) 01010011 001001101000

b) 11010100 100001100000

c) 110101 100001100

d) 101011 001100001

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3. The primary use for Gray code is

a) Coded representation of a shaft’s mechanical position

b) Turning on/off software switches

c) To represent the correct ASCII code to indicate the angular position of a shaft on rotating machinery

d) To convert the angular position of a shaft on rotating machinery into hexadecimal code

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4. Code is a symbolic representation of

a) Continuous information

b) Discrete information

c) Decimal information into binary

d) Binary information into decimal

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5. One way to convert BCD to binary using the hardware approach is

a) With MSI IC circuits

b) With a keyboard encoder

c) With an ALU

d) UART

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6. Why is the Gray code more practical to use when coding the position of a rotating shaft?

a) All digits change between counts

b) Two digits change between counts

c) Only one digit changes between counts

d) None of the Mentioned

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7. Reflected binary code is also known as

a) BCD code

b) Binary code

c) ASCII code

d) Gray Code

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8. Why do we use gray codes?

a) To count the no of bits changes

b) To rotate a shaft

c) Error correction

d) None of the Mentioned

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9. Earlier, reflected binary codes were applied to

a) Binary addition

b) 2’s complement

c) Mathematical puzzles

d) binary multiplication

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10. The binary representation of BCD number 00101001 (decimal 29) is

a) 0011101

b) 0110101

c) 1101001

d) 0101011

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11. Convert binary number into gray code: 100101

a) 101101

b) 001110

c) 110111

d) 111001