# Models for Information Channel [NTA-NET (Based on NTA-UGC) Computer Science (Paper-II)]: Questions 1 - 3 of 26

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## Question number: 1

» Models for Information Channel » Probability, Entropy and Shannon's Measure of Information

Appeared in Year: 2015

### Question

Suppose that from given statistics, it is known that meningitis causes stiff neck 50 % of the time, that the proportion of persons having meningitis is 1/50000, and that the proportion of people having stiff neck is 1/20. Then the percentage of people who had meningitis and complain about stiff neck is: (December)

### Choices

Choice (4) | Response | |
---|---|---|

a. | 0.02% | |

b. | 0.05% | |

c. | 0.04% | |

d. | 0.01% |

## Question number: 2

» Models for Information Channel » Bit-Error Rates

Appeared in Year: 2010

### Question

The baud rate is (December Paper II)

### Choices

Choice (4) | Response | |
---|---|---|

a. | not equal to the signalling rate | |

b. | equal to half of the bandwidth of an ideal channel | |

c. | equal to twice the bandwidth of an ideal channel | |

d. | always equal to the bit transfer rate |

## Question number: 3

» Models for Information Channel » Bit-Error Rates

Appeared in Year: 2010

### Question

The threshold effect in demodulator is (December Paper II)

### Choices

Choice (4) | Response | |
---|---|---|

a. | the rapid fall on output signal to noise ratio when the input signal to noise ratio fall below a particular value. | |

b. | the property exhibited by all A. M. suppressed carrier coherent demodulator. | |

c. | the property exhibited by correlation receiver. | |

d. | exhibited by all demodulator, when the input signal to noise ratio is low. |