Why does performance degrade when many UPDATE， INSERT， or DELETE statements are issued on a tablethat has an associated Bitmap index（）A、The DML operations re-create the Bitmap index blocks.B、The Bitmap index is rebuilt automatically after a DML operation.C、The smallest amount of a bitmap that can be locked is a bitmap segment.D、Additional time is taken to remove NULL values from the Bitmap index after a DML operation.
Why does performance degrade when many UPDATE， INSERT， or DELETE statements are issued on a tablethat has an associated Bitmap index（）
- A、The DML operations re-create the Bitmap index blocks.
- B、The Bitmap index is rebuilt automatically after a DML operation.
- C、The smallest amount of a bitmap that can be locked is a bitmap segment.
- D、Additional time is taken to remove NULL values from the Bitmap index after a DML operation.
相关考题：
Which of the following is least likely to be used in explaining to a team member why you consider his/her performance substandard?A Project office memoB counseling sessionC project team meetingD formal letterE individual conversation
The fact () most people believe the earth is flat does not mean that it is true. A、thatB、theC、whatD、why
—Why does the stream smell terrible? —Because large quantities of water_____. A、have pollutedB、is being pollutedC、has been pollutedD、have been polluted
According to the last paragraph , development of education __________.[A] results directly from competitive environments[B] does not depend on economic performance[C] follows improved productivity[D] cannot afford political changes
7． —Why _________ your brother like baseball?—Because he thinks it is interesting．A．isB．areC．doD．does
－Why does he look so anxious －Because there are so many problems(). A、remaining to settleB、remained settlingC、remaining to be settledD、remained to be settled
In what courses did your worst grades? Why? How do you think that will affect your performance on the job?
Which of the following may illustrate the difference between "competence" and__________ "performance"?A．What a person "knows" and what he/she "does".B．What a person "can do" and what he/she "does".C．What a person "does" and what he/she "knows".D．What a person "does" and what he/she "can do".
“…nor does giving people breakfast improve performance”means______.A.anyone without breakfast does improve his performanceB.not giving people breakfast improve performanceC.having breakfast does not improve performance,eitherD.people having breakfast do improve their performance
I just wonder( )that makes him so excited. A.why it does B.what he does C.how it is D.what it is
Does it always matter if the “real world” is not being practiced in the classroom? Why or why not?
Why does RSTP have a better convergence time than 802.1D？（）A、it is newerB、it has smaller timersC、it has less overheadD、it is not timer-based
A customer has an x445 and uses the internal LSI adapter to manage two 146GB drives in the chassis. The customer is noticing performance issues when deploying a database with significant write activity on the internal drives. Should they consider using a ServeRAID-6M with 256MB of cache instead， and why or why not？（）A、Yes， the internal LSI SCSI adapter has no write cache.B、Yes， the internal LSI SCSI adapter is unreliable.C、No， the downtime to install the card and reformat the drives would be cost prohibitive.D、No， there will be no performance benefit， because drive performance is the bottleneck.
What does the "allow performance information collection" button do in the Hardware Management Console （HMC） GUI？ （）A、 It allows you to get inter partition reports， or cross partition performance activity.B、 It will allow IBM remote technical support to get performance information from the machine.C、 It is effective only on POWER6 and when Live Partition Mobility operations are planned.D、 It will start standard performance monitoring tools when an LPAR boots up， the output will be saved to the /etc/perf directory by default.
A commercial customer will soon send out a Request For Pricing （RFP） for a new large database server. Why would a pSeries technical specialist try to influence the customer to base the requirements on performance （TPC-C， Ideas International Relativity， Oracle Applications Standard Benchmark， etc.） rather than on numbers of processors？（）A、IBM processor performance does not scale well over 16 ways.B、Competitors do not pay for TPC-C certification so results are not available.C、IBM servers consistently outperform some other servers on a "per CPU" basis.D、IBM prices are lower than competition when like numbers of processors are proposed.
填空题Why does the Gmail Team write to the Gmail user?Because the user hasn’t used his/ her Gmail ____ for quite some time.
单选题Why does performance degrade when many UPDATE， INSERT， or DELETE statements are issued on a tablethat has an associated Bitmap index（）AThe DML operations re-create the Bitmap index blocks.BThe Bitmap index is rebuilt automatically after a DML operation.CThe smallest amount of a bitmap that can be locked is a bitmap segment.DAdditional time is taken to remove NULL values from the Bitmap index after a DML operation.
多选题A common approach to solve application performance issues is to add more hardware. Which two reasons describe why this alone does not always solve performance problems?（）AThere may be a bottleneck in the application that additional hardware would not solve.BAdding more hardware is costly and time consuming.CAdding hardware at the application layer may place additional load on an already overloaded database, network appliance, or storage system.DAdding more hardware may introduce new configuration requirements that need to be tested.
问答题Does it always matter if the “real world” is not being practiced in the classroom? Why or why not?
单选题A customer has an x445 and uses the internal LSI adapter to manage two 146GB drives in the chassis. The customer is noticing performance issues when deploying a database with significant write activity on the internal drives. Should they consider using a ServeRAID-6M with 256MB of cache instead， and why or why not？（）AYes， the internal LSI SCSI adapter has no write cache.BYes， the internal LSI SCSI adapter is unreliable.CNo， the downtime to install the card and reformat the drives would be cost prohibitive.DNo， there will be no performance benefit， because drive performance is the bottleneck.
问答题Q3: Do you think it’s better for staff to receive written or oral feedback on their performance? (Why?/Why not?)
单选题Why does Seattle have a better survival rate of cardiac arrest than other cities?APeople in Seattle are probably better off than people in many other states.BSeattle participates in a government-funded medical research network.CAll medical centers in Seattle are the most high-powered.DSeattle tracks outcomes of cardiac-arrest cases to judge their performance.
问答题Q2: What do you think are the most important criteria for measuring staff performance? (Why?/Why not?)
问答题Q5: Apart from appraisal schemes, what other measures do you think are effective improving staff performance? (Why?)