I don’t mind ___by bus, but I hate ___ in queues

9. What sometimes happen? A: A) Some shops have long queues all day. B: B) There are queues waiting for shops to open. C: C) Some shops have to close because they sell out of everything. D: D) The shops get so crowded people can’t move.

I don’t mind___by bus, but I hate___in queues A: to travel…to stand B: travel …stand C: traveling…standing D: to travel…standing

What is Waiting time? A: the total time in the blocked and waiting queues B: the total time spent in the ready queue C: the total time spent in the running queue D: the total time from the completion till the submission of a process

When analyzing disk I/O performance， which of the following metrics and/or statistics should be included in the study？（） A:  Disk size， stock availability， VHDCI B:  Disk size， distance， temperature， and compatibility C:  Disk fragmentation， MTBF， and maintenance D:  Disk configuration， throughput， transactions， queues， and latencies

Which two statements are true about traffic shaping and traffic policing？（） A: both traffic shaping and traffic policing cause retransmissions of connection-oriented protocols such as TCP B: both traffic shaping and traffic policing support the marking and re-marking of traffic C: the effects of traffic shaping and traffic policing when configured on a router are applied to outgoing traffic D: traffic shaping queues excess traffic whereas traffic policing discards excess traffic E: traffic shaping allows the traffic to exceed the bit rate whereas traffic policing prevents the traffic from exceeding the bit rate

CHECKOUTOPERATORSSupermarket Checkout operators sit at electronic tills and feed in the prices of thecustomer’s goods This is now done by ’scanning’, passing each such item over34. a device that reads the bar-code on it and automatically registers it down in the35. till. They may weigh some products, such as fruit, on scales near the36. tilt. When all the goods will have been scanned, the till provides a total and the37. operators take payment in the cash, by cheque or by credit or debit card. and38. give a till receipt and any more change required. They provide bags, often39. help to pack purchases, and change paper till rolls as being necessary.40. They also make it sure they have enough change, credit card forms, and carrier41. bags. Operators ring a bell or buzzer to summon for a supervisor to help42. with problems, and put notes and cheques into bags for periodic collection.43. They enter their personal details in the till, so that their performance can be44. analysed later. The system offers supermarkets an efficient way of handling with a45. large number of customers purchasing many products and helps to keep checkout queues to a minimum. 41（）

CHECKOUTOPERATORSSupermarket Checkout operators sit at electronic tills and feed in the prices of thecustomer’s goods This is now done by ’scanning’, passing each such item over34. a device that reads the bar-code on it and automatically registers it down in the35. till. They may weigh some products, such as fruit, on scales near the36. tilt. When all the goods will have been scanned, the till provides a total and the37. operators take payment in the cash, by cheque or by credit or debit card. and38. give a till receipt and any more change required. They provide bags, often39. help to pack purchases, and change paper till rolls as being necessary.40. They also make it sure they have enough change, credit card forms, and carrier41. bags. Operators ring a bell or buzzer to summon for a supervisor to help42. with problems, and put notes and cheques into bags for periodic collection.43. They enter their personal details in the till, so that their performance can be44. analysed later. The system offers supermarkets an efficient way of handling with a45. large number of customers purchasing many products and helps to keep checkout queues to a minimum. 35（）

CHECKOUTOPERATORSSupermarket Checkout operators sit at electronic tills and feed in the prices of thecustomer’s goods This is now done by ’scanning’, passing each such item over34. a device that reads the bar-code on it and automatically registers it down in the35. till. They may weigh some products, such as fruit, on scales near the36. tilt. When all the goods will have been scanned, the till provides a total and the37. operators take payment in the cash, by cheque or by credit or debit card. and38. give a till receipt and any more change required. They provide bags, often39. help to pack purchases, and change paper till rolls as being necessary.40. They also make it sure they have enough change, credit card forms, and carrier41. bags. Operators ring a bell or buzzer to summon for a supervisor to help42. with problems, and put notes and cheques into bags for periodic collection.43. They enter their personal details in the till, so that their performance can be44. analysed later. The system offers supermarkets an efficient way of handling with a45. large number of customers purchasing many products and helps to keep checkout queues to a minimum. 36（）

CHECKOUTOPERATORSSupermarket Checkout operators sit at electronic tills and feed in the prices of thecustomer’s goods This is now done by ’scanning’, passing each such item over34. a device that reads the bar-code on it and automatically registers it down in the35. till. They may weigh some products, such as fruit, on scales near the36. tilt. When all the goods will have been scanned, the till provides a total and the37. operators take payment in the cash, by cheque or by credit or debit card. and38. give a till receipt and any more change required. They provide bags, often39. help to pack purchases, and change paper till rolls as being necessary.40. They also make it sure they have enough change, credit card forms, and carrier41. bags. Operators ring a bell or buzzer to summon for a supervisor to help42. with problems, and put notes and cheques into bags for periodic collection.43. They enter their personal details in the till, so that their performance can be44. analysed later. The system offers supermarkets an efficient way of handling with a45. large number of customers purchasing many products and helps to keep checkout queues to a minimum. 42（）