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CMS COLLEGE OF SCIENCE AND COMMERCE(AUTONOMOUS)

DEPARTMENT OF ELECTRONICS

I M.Sc APPLIED ELECTRONICS

LINEAR IC’S AND ITS APPLICATION

Unit - I

S.No Questions Ans

1.An operational amplifier is a ____________ high gain amplifier

(a) Direct coupled (b) Indirect coupled (c) Index coupled (d) registera

DIGITAL ELECTRONICS

UNIT – I NUMBER SYSTEMS

1. Any number with an exponent of zero is equal to:A.zeroB.oneC.that numberD.ten

Answer: Option B

2. Which of the following statements does NOT describe an advantage of digital technology?

A.The values may vary over a continuous range.B.The circuits are less affected by noise.C.The operation can be programmed.D.Information storage is easy.

Answer: Option A

Convert the fractional binary number 0000.1010 to decimal.A.0.625 B.0.50

C.0.55 D.0.10

Answer: Option A

Convert the fractional decimal number 6.75 to binary.A.0111.1100 B.0110.1010C.0110.1100 D.0110.0110

Answer: Option C

Give the decimal value of binary 10000110.A.13410 B.14410

C.11010 D.12610

Answer: Option A

7. What are the symbols used to represent digits in the binary number system?A.0,1B.0,1,2C.0 through 8D.1,2

Answer: Option A

Give the decimal value of binary 10010.A.610 B.910

C.1810 D.2010

Answer: Option C

Convert the fractional decimal number 6.75 to binary.A.0111.1100 B.0110.1010C.0110.1100 D.0110.0110

Answer: Option C

Give the decimal value of binary 10000110.A 13410 B.14410

.C.11010 D.12610

Answer: Option A

What is the decimal value of 23 ?A.2 B.4C.6 D.8Answer & Explanation

Answer: Option D

Convert the fractional binary number 0001.0010 to decimal.A.1.40 B.1.125C.1.20 D.1.80Answer & Explanation

Answer: Option B

Convert the fractional binary number 10010.0100 to decimal.A.24.50 B.18.25C.18.40 D.16.25Answer & Explanation

Answer: Option B

Any number with an exponent of one is equal to:A.zero.B.one.C.two.D.that number.Answer & Explanation

Answer: Option D

What is the decimal value of 2–1 ?

A.0.5 B.0.25C.0.05 D.0.1Answer & Explanation

Answer: Option A

How many unique symbols are used in the decimal number system?A.One B.NineC.Ten D.UnlimitedAnswer & Explanation

Answer: Option C

Add the following hexadecimal numbers.

3C   14   3B+25   +28   +DC

A.60    3C    116 B.62    3C    118C.61    3C    117 D.61    3D    117Answer & Explanation

Answer: Option C

Solve this BCD problem: 0100 + 0110 =A.00010000BCD B.00010111BCD

C.00001011BCD D.00010011BCD

Answer & Explanation

Answer: Option A

The most commonly used system for representing signed binary numbers is the:A.

2's-complement system.

B.1's-complement system.C.10's-complement system.D.

sign-magnitude system.

Answer & Explanation

Answer: Option A

 The decimal value for E16 is:A.1210 B.1310

C.1410 D.1510

Answer & Explanation

Answer: Option C

 The binary subtraction 0 – 0 =

A.difference = 0borrow = 0

B.difference = 1borrow = 0

C.difference = 1borrow = 1

D.difference = 0borrow = 1

Answer & Explanation

Answer: Option A

How many basic binary subtraction operations are possible?A.4 B.3C.2 D.1Answer & Explanation

Answer: Option A

When performing subtraction by addition in the 2's-complement system:A.the minuend and the subtrahend are both changed to the 2's-complement.

B.the minuend is changed to 2's-complement and the subtrahend is left in its original form.

C.the minuend is left in its original form and the subtrahend is changed to its 2's-complement.

D.the minuend and subtrahend are both left in their original form.Answer & Explanation

Answer: Option C

When 1100010 is divided by 0101, what is the decimal remainder?

A.2 B.3C.4 D.6Answer & Explanation

Answer: Option B

Perform subtraction on each of the following binary numbers by taking the two's-complement of the number being subtracted and then adding it to the first number.01001        0110000011        00111A.01100    10011 B.00110    00101C.10110    10101 D.00111    00100Answer & Explanation

Answer: Option B

Determine the two's-complement of each binary number.00110        00011        11101A.11001    11100    00010B.00111    00010    00010C.00110    00011    11101D.11010    11101    00011Answer & Explanation

Answer: Option D

Solve this binary problem: 01110010 – 01001000 =A.00011010 B.00101010C.01110010 D.00111100Answer & Explanation

Answer: Option B

Solve this binary problem:

A.1001 B.0110C.0111 D.0101Answer & Explanation

Answer: Option C

Solve this binary problem: 01000110 ÷ 00001010 =A.0111 B.10011C.1001 D.0011Answer & Explanation

Answer: Option A

How many BCD adders would be required to add the numbers 97310 + 3910?A.3 B.4C.5 D.6Answer & Explanation

Answer: Option A

Which of the following is the primary advantage of using binary-coded decimal (BCD) instead of straight binary coding?A.Fewer bits are required to represent a decimal number with the BCD code.B.BCD codes are easily converted from decimal.C.the relative ease of converting to and from decimalD.BCD codes are easily converted to straight binary codes.Answer & Explanation

Answer: Option C

Add the following binary numbers.

0010 0110   0011 1011   0011 1100+0101 0101   +0001 1110   +0001 1111

A.0111 1011    0100  0001    0101  1011B.0111 1011    0101  1001    0101  1011C.0111 0111    0101  1001    0101  1011D.0111 0111    0100  0001    0101  1011Answer & Explanation

Answer: Option B

Subtract the following binary numbers.

0101 1000   1010 0011   1101 1110–0010 0011   –0011 1000   –0101 0111

A.0011  0100    0110  1010    1000  0110B.0011  0101    0110  1011    1000  0111C.0011  0101    0110  1010    1000  0111D.0011  0101    0110  1010    1000  0110Answer & Explanation

Answer: Option B

Find the 2's complement of –1101102.A.1101002 B.1010102

C.0010012 D.0010102

Answer & Explanation

Answer: Option D

When decimal numbers with several digits are to be added together using BCD adders ________.A.a separated BCD adder is required for each digit positionB.the BCD adders must have the carry-outs groundedC.the BCD's must be grouped in twosD.full adders are also usedAnswer & Explanation

Answer: Option A

Subtraction of the 2's-complement system actually involves the operation of ________.A.multiplication B.subtractionC.addition D.divisionAnswer & Explanation

Answer: Option C

The binary addition of 1 + 1 = ________.A.sum = 1

carry = 1

B.sum = 0carry = 0

C.sum = 1carry = 0

D.sum = 0carry = 1

Answer & Explanation

Answer: Option D

The two's complement of 00001111 is ________.A.11111111 B.11110000C.11110001 D.11110111Answer & Explanation

Answer: Option C

–910 represented in eight-bit two's-complement notation is ________.A.11110111 B.11111001C.11110110 D.01111101Answer & Explanation

Answer: Option A

34FC + AD31 = ________.A.E22D B.E31DC.E21D D.E42DAnswer & Explanation

Answer: Option A

Explanation:

Solve this binary problem: 1001 × 1100 = ________.A.

01110001 B.01111000

C.01101100 D.01101110Answer & Explanation

Answer: Option C

The binary subtraction 1 – 1 = ________.

A.difference = 0borrow = 0

B.difference = 1borrow = 0

C.difference = 1borrow = 1

D.difference = 0borrow = 1

Answer & Explanation

Answer: Option A

When subtracting 6 from 9 using 2's-complement methods, the ________ is 2's complemented before the addition.A.six B.multiplierC.nine D.twoAnswer & Explanation

Answer: Option A

Negation is performed by simply performing the ________ operation.A.1's-complement B.signC.surrogate D.2's-complementAnswer & Explanation

Answer: Option D

Hexadecimal is a base 4 numbering system.A.True B.FalseAnswer & Explanation

Answer: Option B

A binary sum is made up of only 1s and 0s.A.True B.FalseAnswer & Explanation

Answer: Option A

111010002 is the 2's-complement representation of –24.A.True B.FalseAnswer & Explanation

Answer: Option B

The solution to the BCD problem 0101 + 0100 is 00001001BCD.A.

True B.False

Answer & Explanation

Answer: Option A

The binary subtraction 0 – 1 = isdifference = 1borrow = 0A.True B.FalseAnswer & Explanation

Answer: Option B

10011100 in two's-complement notation has a decimal value of –100.A.True B.FalseAnswer & Explanation

Answer: Option B

There are four possible combinations for subtracting two binary numbers.A.True B.False

Answer & Explanation

Answer: Option A

The representation of –110 in eight-bit two's-complement notation is 11110111.A.True B.FalseAnswer & Explanation

Answer: Option B

Binary division and decimal division use the same procedure.A.

True B.False

Answer & Explanation

Answer: Option A

When the 2's-complement system is used, the number to be subtracted is changed to its 2's complement and then added to the minuend.A.True B.FalseAnswer & Explanation

Answer: Option A

The two's-complement method is used in computer systems that perform arithmetic.A.True B.FalseAnswer & Explanation

Answer: Option A

Binary multiplication is like decimal multiplication except you deal only with 1s and 0s.A.True B.FalseAnswer & Explanation

Answer: Option A

The solution to the binary problem 1011 – 0111 is 1000.A True B.False

.Answer & Explanation

Answer: Option B

The solution to the binary problem 0101 + 1111 is 10100.A.True B.FalseAnswer & Explanation

Answer: Option A

UNIT – II

BOOLEAN ALGEBRA

The output of an exclusive-NOR gate is 1. Which input combination is correct?A.A = 1, B = 0B.A = 0, B = 1C.A = 0, B = 0D.none of the aboveAnswer & Explanation

Answer: Option C

The Boolean SOP expression obtained from the truth table below is ________.

A.B.C.D.None of theseAnswer & Explanation

Answer: Option C

To implement the expression , it takes one OR gate and ________.A.three AND gates and three invertersB.three AND gates and four invertersC.three AND gatesD.one AND gateAnswer & Explanation

Answer: Option A

How many AND gates are required to implement the Boolean expression,

?A.

1 B.2

C.3 D.4Answer & Explanation

Answer: Option C

How many NOT gates are required to implement the Boolean expression,

?A.1 B.2C.4 D.5Answer & Explanation

Answer: Option B

The inverter can be produced with how many NAND gates?A.1 B.2C.3 D.4Answer & Explanation

Answer: Option A

Implementation of the Boolean expression results in ________.A.three AND gates, one OR gateB.three AND gates, one NOT gate, one OR gateC.three AND gates, one NOT gate, three OR gatesD.three AND gates, three OR gatesAnswer & Explanation

Answer: Option B

How many 2-input NOR gates does it take to produce a 2-input NAND gate?A.1 B.2C.3 D.4Answer & Explanation

Answer: Option D

A logic circuit with an output consists of ________.A.two AND gates, two OR gates, two invertersB.three AND gates, two OR gates, one inverterC.two AND gates, one OR gate, two invertersD.two AND gates, one OR gateAnswer & Explanation

Answer: Option C

A decoder converts ________.A.noncoded information into coded formB.coded information into noncoded formC.HIGHs to LOWsD.LOWs to HIGHs

Answer: Option B

A DAC changes ________.A.an analog signal into digital dataB.digital data into an analog signalC.digital data into an amplified signalD.none of the above

Answer: Option B

A demultiplexer has ________.A.one data input and a number of selection inputs, and they have several outputsB.one input and one outputC.several inputs and several outputsD.several inputs and one output

Answer: Option A

A flip-flop has ________.A.one stable stateB.no stable statesC.two stable statesD.none of the above

Answer: Option C

Digital representations of numerical values of quantities may BEST be described as having characteristics:A.that are difficult to interpret because they are continuously changing.B.that vary constantly over a continuous range of values.C.that vary in constant and direct proportion to the values they represent.D.that vary in discrete steps in proportion to the values they represent.

Answer: Option D

6. What is a digital-to-analog converter?A.It takes the digital information from an audio CD and converts it to a usable form.B.It allows the use of cheaper analog techniques, which are always simpler.C.It stores digital data on a hard drive.D.It converts direct current to alternating current.

Answer: Option A

A full subtracter circuit requires ________.A.two inputs and two outputsB.two inputs and three outputsC.three inputs and one outputD.three inputs and two outputs

Answer: Option D

What is an analog-to-digital converter?A.It makes digital signals.B.It takes analog signals and puts them in digital format.C.It allows the use of digital signals in everyday life.D.It stores information on a CD.Answer & Explanation

Answer: Option B

A multiplexer has ________.A.one input and several outputsB.one input and one outputC.several inputs and several outputsD.several inputs and one outputAnswer & Explanation

Answer: Option D

An encoder converts ________.A.

noncoded information into coded form

B.coded information into noncoded formC.HIGHs to LOWsD.

LOWs to HIGHs

Answer & Explanation

Answer: Option A

What kind of logic device or circuit is used to store information?A.Counter B.RegisterC.Inverter D.BufferAnswer & Explanation

Answer: Option B

Which of the following is a semiconductor memory?A.RAM B.MARC.CD-ROM D.CDAnswer & Explanation

Answer: Option A

For a 4-bit parallel adder, if the carry-in is connected to a logical HIGH, the result is:A.the same as if the carry-in is tied LOW since the least significant carry-in is ignored.B.that carry-out will always be HIGH.C.a one will be added to the final result.D.the carry-out is ignored.Answer & Explanation

Answer: Option C

What is the major difference between half-adders and full-adders?A.Nothing basically; full-adders are made up of two half-adders.B.Full adders can handle double-digit numbers.C.Full adders have a carry input capability.D.Half adders can handle only single-digit numbers.Answer & Explanation

Answer: Option C

One way to make a four-bit adder perform subtraction is by:A.inverting the output.B.inverting the carry-in.C.inverting the B inputs.D.grounding the B inputs.Answer & Explanation

Answer: Option C

What are the two types of basic adder circuits?A.sum and carryB.half-adder and full-adderC.asynchronous and synchronousD.one- and two's-complementAnswer & Explanation

Answer: Option B

A half-adder circuit would normally be used each time a carry input is required in an added circuit.A.True B.FalseAnswer & Explanation

Answer: Option B

Explanation:

How many inputs must a full-adder have?A.4 B.2C.5 D.3Answer & Explanation

Answer: Option D

Half-adders can be combined to form a full-adder with no additional gates.A.True B.False

Answer & Explanation

Answer: Option B

Which of the statements below best describes the given figure?

A.Half adder; Sum = 0, Carry = 1B.Half adder; Sum = 1, Carry = 0C.Full adder; Sum = 1, Carry = 0D.Full adder; Sum = 1, Carry = 1Answer & Explanation

Answer: Option A

A full-adder adds ________.A.

two single bits and one carry bit

B.two 2-bit binary numbersC.two 4-bit binary numbersD.

two 2-bit numbers and one carry bit

Answer & Explanation

Answer: Option A

How many inputs must a full-adder have?A.2 B.3C.4 D.5Answer & Explanation

Answer: Option B

The summing outputs of a half- or full-adder are designated by which Greek symbol?

A.omega B.thetaC.lambda D.sigmaAnswer & Explanation

Answer: Option D

What logic function is the sum output of a half-adder?A.AND B.exclusive-ORC.exclusive-NOR D.NANDAnswer & Explanation

Answer: Option B

The binary adder circuit is designed to add ________ binary numbers at the same time.A.2 B.4C.6 D.8Answer & Explanation

Answer: Option A

The circuit shown is a(n) ________.

A.multiplexer B.adderC.comparator D.converterAnswer & Explanation

Answer: Option B

Binary numbers can be added together in a basic parallel-adder circuit when ________.A.negative numbers are in 2's-complement formB.negative numbers are in 1's-complement formC.all carry pins are grounded

D.all negative numbers are notedAnswer & Explanation

Answer: Option A

To make an eight-bit adder from two four-bit adders you must connect ________.A.the high-order carry-in to groundB.the low-order carry-out to the high-order carry-inC.the high-order carry-out to groundD.the low-order sum to the high-order data inputAnswer & Explanation

Answer: Option B

A four-bit adder can perform ________.A.additionB.subtractionC.logical ANDD.All of the aboveAnswer & Explanation

Answer: Option A

A full adder has a carry-in.A.True B.FalseAnswer & Explanation

Answer: Option A

The inputs of a full adder are labeled A1, B1, and Cin.A.True B.FalseAnswer & Explanation

Answer: Option A

Larger number capacities may be obtained from 2-bit adders by paralleling them.A.True B.FalseAnswer & Explanation

Answer: Option A

A half-adder circuit would normally be used each time a carry input is required in an adder circuit.A.True B.FalseAnswer & Explanation

Answer: Option B

Full adders can add two numbers and need not have a carry input or a carry output.A.True B.FalseAnswer & Explanation

Answer: Option B

This logic gate is used to produce an arithmetic sum XOR.A.True B.FalseAnswer & Explanation

Answer: Option A