COP 4600 Midterm Review Exam Questions With Correct Answers

COP 4600 Midterm Review Exam
Questions With Correct Answers

______ |is |a |part |of |a |process |that |has |______ |- |CORRECT |ANSWER✔✔-Thread; |

It's |own |execution |history( |can't |have |without |a |stack) |

Program |Counter |

Stack



Every |process |has |______ |threads |and |every |thread |____ |- |CORRECT |ANSWER✔✔-one |or |
more |threads;

belongs |to |exactly |one |process



Elements |that |are |unique |to |a |process |but |not |a |thread |- |CORRECT |ANSWER✔✔-
text(instructions)

data |(constants/statics)

heap( |dynamic |allocations)



Reason |to |use |multiple |threads |instead |of |process |- |CORRECT |ANSWER✔✔-Can |reduce |
overhead |and |facilitate |sharing



**Threading: |Classical |Model; |Explain |Uniprogrammed, |Multiprocess |Model, |and |Threaded |
Model |- |CORRECT |ANSWER✔✔-Uni: |One |process |at |at |time, |wait |for |a |process |to |finish; |



Multiprocess:Process |switch |in |and |out. |

, Threaded |switch |between |threads |within |a |process. |( |this |reduces |context |switch |times)



Why |do |we |use |threads |- |CORRECT |ANSWER✔✔--break |up |complicated |tasks |into |simple |ones
|



-improve |efficiency



compared |to |new |processes, |threads |have |- |CORRECT |ANSWER✔✔--lower |memory |
cost(shared |segments) |

-information |sharing |( |through |shared |data) |

-reduced |creation, |

destruction |time |(allocation, |copying) |

-reduce |context |time |( |to |another |thread |in |the |same |process |only)



What's |in |a |thread? |(Give |Process |Specific |versus |Thread |Specific |Components) |- |CORRECT |
ANSWER✔✔-Specific |to |A |Thread: |

Program |Counter |

Registers |

Stack |

State |



Specific |to |A |Process:

Address |Space

Global |Variables |

Open |file |

Child |processes |

Pending |alarms |

signals |and |handlers |