考题
Youperformdifferentialincrementallevel1backupsofyourdatabaseoneachworkingdayandlevel0backuponSundays,totape.Whichtwostatementsaretrueaboutdifferentialincrementalbackups()
A.ThebackupperformedonSundayscontainsalltheblocksthathaveeverbeenusedinthedatabase.B.ThebackupperformedonSundayscontainsalltheblocksthathavechangedsincethelastlevel1backup.C.Thebackupperformedoneachworkingdaycontainsalltheblocksthathavechangedsincethelastlevel0 backup.D.ThebackupperformedonMondaycontainsalltheblocksthathavechangedsincethelevel0backup,and everyotherworkingdaycontainsalltheblocksthathavechangedsincethelevel1backup
考题
To enable the Database Smart Flash Cache, you configure the following parameters:DB_FLASH_CACHE_FILE = ‘/dev/flash_device_1’ , ‘/dev/flash_device_2’DB_FLASH_CACHE_SIZE=64GWhat is the result when you start up the database instance?()A. It results in an error because these parameter settings are invalid.B. One 64G flash cache file will be used.C. Two 64G flash cache files will be used.D. Two 32G flash cache files will be used.
考题
Anti- virus software protects your computer from viruses by(75)your computer's memory and disk devices.A.deletingB.changingC.scanningD.replacing
考题
JAVA File类执行下面这段程序为什么会出现异常 File file=new File(args[0]); 这句是什么意思??
importjava.io.*;importjava.util.*;publicclassFileClass{/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstubtry{Filefile=newFile(args[0]);System.out.println(args[0]+"文件");if(file.isFile()){//是否为文件System.out.print(file.canRead()?"可读":"不可读");System.out.print(file.canWrite()?"可写":"不可写");System.out.print(file.length()+"字节");//注意不能调用数组类型File[]的length()例:File[]files=file.listFiles();不可以这么调用filess.length()}else{//列出所有文件及目录File[]files=file.listFiles();ArrayListFilefileList=newArrayListFile();for(inti=0;ifiles.length;i++){//先列出目录if(files[i].isDirectory()){//是否为目录//取得路径名System.out.println("路径"+"["+files[i].getPath()+"]");}else{//文件先存入fileList,待会再列出fileList.add(files[i]);}}//列出文件for(Filef:fileList){System.out.println(f.toString());}System.out.println();}}catch(ArrayIndexOutOfBoundsExceptione){System.out.println("using:javaFileDemopathname");}}}结果:using:javaFileDemopathname是不是创建的对象所代表的文件没有被创建成功
考题
WhichCiscoCatalystswitchesfitintheaccessarea?()
A.CiscoCatalyst2900Series,Catalyst7300Series,andCatalyst8000SeriesB.CiscoCatalyst2900Series,Catalyst3700Series,andCatalystSeriesC.CiscoCatalyst2700Series,Catalyst7300Series,andCatalyst8000SeriesD.CiscoCatalyst2700Series,Catalyst3700Series,andCatalyst4500Series
考题
According to the sales director, Ms. Elms is___________to one of our subsidiaries to collaborate with its sales team.A.delivering
B.visiting
C.transferring
D.replacing
考题
Be informed that this medication is for temporary relief of symptoms, and is not intended ( ) your annual immunization shot.
A. replaced
B. replace
C. to replace
D. replacing
考题
The management believes that __________all of the damaged goods will cost more than hiring a contractor to repair them.A. replacement
B. replaces
C. replaced
D. replacing
考题
老伍按以下方式生成数据: import pandas as pd dt={'one':pd.Series([3,2,1],index=['c','b','a']), 'two':pd.Series([9,8,7,6],index=['a','b','c','d'])} d=pd.DataFrame(dt) c=d.index c=d.values c=d.columns c 请问输出结果为:A.Index(['a', 'b', 'c', 'd'], dtype='object')B.array([[ 1., 9.], [ 2., 8.], [ 3., 7.], [nan, 6.]])C.Index(['one', 'two'], dtype='object')D.信你个鬼,老伍这个糟老头子坏得很,没有输出!
考题
老伍按以下方式生成数据: import pandas as pd dt={'one':pd.Series([3,2,1],index=['c','b','a']), 'two':pd.Series([9,8,7,6],index=['a','b','c','d'])} d=pd.DataFrame(dt) c=d.columns c=d.values c=d.index c 请问输出结果为:A.Index(['a', 'b', 'c', 'd'], dtype='object')B.array([[ 1., 9.], [ 2., 8.], [ 3., 7.], [nan, 6.]])C.Index(['one', 'two'], dtype='object')D.信你个鬼,老伍这个糟老头子坏得很,没有输出!