## UGC NET Computer Science : June 2012 – Paper 3 (Solved Papers)

Question 1 |

Given the following statements :

- The power of deterministic finite state machine and nondeterministic finite state machine are same.
- The power of deterministic pushdown automaton and nondeterministic pushdown automaton are same.

Neither (i) nor (ii) | |

Only (ii) | |

Only (i) | |

Both (i) and (ii) |

Question 2 |

Let Q(x, y) denote “x + y = 0” and let there be two quantifications given as -

(i) ∃y∀xQ(x,y)

(ii) ∀x∃yQ(x, y)where x & y are real numbers. Then which of the following is valid ?

(i) is true & (ii) is false. | |

(i) is false & (ii) is also false. | |

(i) is false & (ii) is true. | |

both (i) & (ii) are true. |

Question 3 |

Consider a schema R(A, B, C, D) and functional dependencies A→B and C→D. Then the decomposition R1(A, B) and R2(C, D) is

Dependency preserving and lossless join | |

Lossless Join | |

Dependency preserving but not lossless join | |

Lossless Join but not dependency preserving |

Question 4 |

The quantiser in an image-compression system is a

lossy element which exploits the statistical redundancy | |

lossless element which exploits the statistical redundancy | |

lossy element which exploits the psychovisual redundancy | |

lossless element which exploits the psychovisual redundancy |

Question 5 |

Data Warehouse provides

Storage, Functionality Responsiveness to queries | |

None of the above | |

Demand and Supply Responsiveness | |

Transaction Responsiveness |