ADC UNIT 4

Self information should be

• Positive

• Negative

• Positive & Negative

• zero

Binary Huffman coding is a

• Prefix condition code

• Suffix conditioncode

• Prefix & Suffix conditioncode

• Neither prefix nor suffix code

Entropy of a random variable is

• 0

• 1

• infinite

• cannot be determined

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

• Bits

• Bytes

• Nats

• watts

Which reduces the size of the data?

• Source coding

• channel coding

• Source & Channel coding

• CRC codes

Which coding method uses entropy coding?

• Lossless coding

• Lossy coding

• Lossless &Lossy coding

• Huffman codes

Which are uniquely decodable codes?

• Fixed length codes

• variable length codes

• both fixed and variable length codes

• either fixed or variable length codes

The type of encoding where no character code is the prefix of another character code is called?

• optimal encoding

• prefix encoding

• frequency encoding

• trie encoding

What is the role of channel in communication system?

• acts as a medium to send message signals from transmitter to receiver

• converts one form of signal to other

• allows mixing of signals

• helps to extract original signal from incoming signal

For a error free channel, conditional probability should be

• zero

• one

• Equal to joint probability

• Equal to individual probability