Which are uniquely decodable codes?

1.Fixed length codes

2.Variable length codes

3.Fixed & Variable length codes

4. None of the mentioned

A code is a mapping from

1.Binary sequence to dicrete set of symbols

2.Discrete set of symbols to binary sequence

3.All of the mentioned

4.None of the mentioned

A rate distortion function is a

1.Concave function

2.Convex function

3.Increasing function

4.None of the mentioned

ASCII code is a

1.Fixed length code

2.Variable length code

3.Fixed & Variable length code

4.None of the mentioned

Binary Huffman coding is a

1.Prefix condition code

2.Suffix condition code

3.Prefix & Suffix condition code

4.None of the mentioned

Coded system are inherently capable of better transmission efficiency than the uncoded system.

1.True

2.False

CRC uses

1.Multiplication

2.Binary division

3.Multiplication & Binary division

4.None of the mentioned

Digital signals are easy for

1.Storage

2.Handling

3.Time dilation

4.All of the mentioned

Entropy of a random variable is

1.0

2.1

3.Infinite

4.Cannot be determined

Error is equal to

1.Distance between the data points

2.Square of the distance between the data points

3.Half the distance between the data points

4.None of the mentioned

Gaussian process is a _____ interpolation process.

1.Linear

2.Non linear

3.Not an interpolation process

4.None of the mentioned

How error detection and correction is done?

1.By passing it through equalizer

2.By passing it through filter

3.By amplifying it

4.By adding redundancy bits

In digital image coding which image must be smaller in size?

1.Input image

2.Output image

3.Input & Output image

4.None of the mentioned

In symmetric key cryptosystem, who knows the key?

1.Sender

2.Receiver

3.Sender & Receiver

4.None of the mentioned

In synchronous transmission, receiver must stay synchronous for

1.4 bits

2.8 bits

3.9 bits

4.16 bits

Interpolation is a method of

1.Interrelating

2.Estimating

3.Integrating

4.Combining

Interpolation is done by

1.Curve fitting

2.Regression analysis

3.Curve fitting & Regression analysis

4.None of the mentioned

Interpolation means

1.Adding new data points

2.Only aligning old data points

3.Only removing old data points

4.None of the mentioned

Interpolation methods are

1.Linear interpolation

2.Piecewise constant interpolation

3.Polynomial interpolation

4.All of the mentioned

Interpolation provides a mean for estimating functions

1.At the beginning points

2.At the ending points

3.At the intermediate points

4.None of the mentioned

Lempel-Ziv algorithm is

1.Variable to fixed length algorithm

2.Fixed to variable length algorithm

3.Fixed to fixed length algorithm

4.Variable to variable length algorithm

Linear interpolation is

1.Easy

2. Precise

3.Easy & Precise

4.None of the mentioned

Mutual information should be

1.Positive

2.Negative

3.Positive & Negative

4.None of the mentioned

Self information should be

1.Positive

2.Negative

3.Positive & Negative

4.None of the mentioned

The event with minimum probability has least number of bits.

1.True

2.False

The method of converting a word to stream of bits is called as

1.Binary coding

2.Source coding

3.Bit coding

4.Cipher coding

The self information of random variable is

1.0

2.1

3.Infinite

4.Cannot be determined

The unit of average mutual information is

1.Bits

2.Bytes

3.Bits per symbol

4.Bytes per symbol

When probability of error during transmission is 0.5, it indicates that

1.Channel is very noisy

2.No information is received

3.Channel is very noisy & No information is received

4.None of the mentioned

When the base of the logarithm is 2, then the unit of measure of information is

1.Bits

2.Bytes

3.Nats

4.None of the mentioned

When X and Y are statistically independent, then I (x,y) is

1.1

2.0

3.Ln 2

4.Cannot be determined

Which achieves greater compression?

1.Lossless coding

2.Lossy coding

3.Lossless & Lossy coding

4.None of the mentioned

Which are forward error correcting codes?

1.Block codes

2.Convolutional codes

3.Block & Convolutional codes

4.None of the mentioned

Which can detect two bit errors?

1.Parity check

2.Cyclic redundancy check

3.Parity & Cyclic redundancy check

4.None of the mentioned

Which coding method uses entropy coding?

1.Lossless coding

2.Lossy coding

3. Lossless & Lossy coding

4.None of the mentioned

Which gets less affected by noise?

1.Error correction

2.Error detection

3.Error correction & detection

4.None of the mentioned

Which has better minimum distance?

1.Check sum

2.Cyclic redundancy check

3.Check sum & Cyclic redundancy check

4.None of the mentioned

Which has comparatively high frequency component?

1.Sine wave

2.Cosine wave

3. Square wave

4.None of the mentioned

Which has continuous transmission?

1.Asynchronous

2.Synchronous

3. Asynchronous & Synchronous

4.None of the mentioned

Which is more complex?

1.Encoding

2.Decoding

3.Encoding & Decoding

4.None of the mentioned

Which is more efficient method?

1.Encoding each symbol of a block

2.Encoding block of symbols

3.Encoding each symbol of a block & Encoding block of symbols

4.None of the mentioned

Which is more expensive?

1.Polynomial interpolation

2.Linear interpolation

3.Polynomial & Linear interpolation

4.None of the mentioned

Which is used to protect privacy of the information?

1.Compression coding

2.Source coding

3.Cipher coding

4.None of the mentioned

Which needs more check bits?

1.Error correction

2.Error detection

3.Error correction & detection

4. None of the mentioned

Which needs re-sending of signal?

1.Error correction

2.Error detection

3.Error correction & detection

4.None of the mentioned

Which operates on continuous stream of data?

1.Block codes

2. Convolutional codes

3.Block & Convolutional codes

4.None of the mentioned

Which produces smoother interpolants?

1.Polynomial interpolation

2.Spline interpolation

3.Polynomial & Spline interpolation

4.None of the mentioned

Which reduces the size of the data?

1.Source coding

2.Channel coding

3.Source & Channel coding

4.None of the mentioned

Which requires bit transitions?

1.Asynchronous

2.Synchronous

3.Asynchronous & Synchronous

4.None of the mentioned

While recovering signal, which gets attenuated more?

1.Low frequency component

2.High frequency component

3.Low & High frequency component

4.None of the mentioned

- Electrical Measurement MCQ Question Set 1
- Electrical Measurement MCQ Question Set 2
- Electrical Measurement MCQ Question Set 3
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- Electrical Measurement MCQ Question Set 14
- Electrical Measurement MCQ Question Set 15
- Electrical Measurement MCQ Question Set 16
- Electrical Measurement MCQ Question Set 17
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- Digital Communications MCQs set-17

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