Chapter 9 · MCQ Read Mode

Information Theory System and Coding

Information theory was founded by:

The information content of an event with probability p is:

Entropy of a source is maximum when the symbols are:

The Shannon-Hartley channel capacity formula is:

Entropy is measured in:

A Fourier transform converts a signal from:

Increasing the signal-to-noise ratio of a channel:

Power Spectral Density describes how a signal's power is distributed over:

A continuous signal is classified as:

Bandwidth of a signal refers to its range of:

The Nyquist sampling theorem states that the sampling rate must be at least:

PCM stands for:

The three steps to convert analog to digital are:

Delta modulation uses how many bits per sample?

Error introduced by rounding sampled values is called:

Multiple signals sharing a channel using time slots is:

Overlapping of adjacent pulses causing detection errors is:

DPCM encodes the ____ between successive samples.

A Phase-Locked Loop (PLL) is used to:

If a signal's highest frequency is 4 kHz, the minimum sampling rate is:

Which source coding technique produces an optimal prefix code?

Huffman coding builds its tree in a ____ manner.

In source coding, more frequent symbols are assigned:

The average code length of a source can never be less than its:

A signal with finite average power and infinite energy is a:

Shannon-Fano coding splits symbols in a ____ manner.

A fully predictable signal is classified as:

Coding efficiency is defined as:

Reliable transmission is possible (Shannon) when the data rate is:

A signal with finite total energy is called a/an:

Loss of signal strength as it travels along a medium is called:

Which code can both DETECT and CORRECT a single-bit error?

CRC error detection is based on:

The Hamming distance between two codewords is the number of:

To correct 'd' errors, the minimum Hamming distance must be at least:

Interference of a signal from one channel onto another is called:

A single parity bit can:

Forward Error Correction (FEC) corrects errors:

To DETECT 'd' errors, the minimum Hamming distance must be at least:

Which is a lossless compression technique?

ARQ stands for:

In Go-Back-N ARQ, when an error occurs the sender retransmits:

Which flow control method sends only one frame and waits for an ACK?

Selective Repeat ARQ retransmits:

The sliding window protocol improves performance by:

Asynchronous transmission frames each character with:

Which ARQ protocol is the most efficient but most complex?

Flow control is used to prevent:

Synchronous transmission sends data as:

ARQ protocols rely on ____ to signal successful receipt.

In ASK (Amplitude Shift Keying), the carrier's ____ varies with data.

In FSK, the carrier's ____ is changed to represent data.

In PSK, the carrier's ____ is varied.

QPSK transmits how many bits per symbol?

A modem performs:

Manchester encoding is notable for being:

In Frequency Modulation (FM), the carrier's ____ changes with the message.

Encoding converts digital data into:

Which modulation carries multiple bits per symbol using both amplitude and phase?

Differential PSK (DPSK) encodes data based on:

The Fourier Transform is used to:

When a square wave is applied to an integrator op-amp circuit, the output is:

The Z-transform is primarily used for:

Interleaving in digital communications provides what type of diversity?

In FDM, increasing the modulation index results in:

Adding zeros to the end of a discrete signal before taking its DFT is called:

In TDM (Time Division Multiplexing), the component essential for recovering individual channels at the receiver is:

In a common-collector (emitter follower) BJT amplifier, the phase relationship between input and output is: