[单项选择] You have enabled backup optimization in RMAN. You issue the following RMAN command to configure a redundancy-based retention policy: CONFIGURE RETENTION POLICY TO REDUNDANCY 3; Which statement is true?（）
A. The command fails because you cannot configure a redundancy-based retention policy when backup optimization is enabled
B. Backup optimization is performed, but RMAN considers the redundancy-based retention policy when it determines which datafiles should be backed up
C. Backup optimization is permanently disabled
D. Backup optimization is temporarily disabled because a redundancy-based retention policy is specified

[多项选择]You have enabled backup optimization for the RMAN environment. Identify two criteria on which RMAN will skip the file, if it has already been backed up.（） (Choose two.)
A. The data file backup is done with multiple channels
B. The data files is in the read-write mode after being backed up in the read only mode
C. The backup was taken after the data files was taken offline-normal or is in the read only mode
D. The data file backup complies with the back retention policy and the backup duplexing feature

[单项选择] You have enabled backup optimization in RMAN. You issue the following RMAN command to configure a redundancy-based retention policy：   CONFIGURE RETENTION POLICY TO REDUNDANCY 3；   Which statement is true？（）  
A.  The command fails because you cannot configure a redundancy-based retention policy when backup  optimization is enabled
B.  Backup optimization is performed， but RMAN considers the redundancy-based retention policy when it determines which datafiles should be backed up
C.  Backup optimization is permanently disabled
D.  Backup optimization is temporarily disabled because a redundancy-based retention policy is specified

[多项选择]You have enabled resumable space allocation in your database by setting the RESUMABLE_TIMEOUT parameter set to a nonzero value.Which three statements about resumable space allocation are true? （）
A. Even with resumable space allocation enabled for your database, you can disable resumable space allocation for a single session.
B. A resumable statement is suspended only if an out of space error occurs. （Out of space condition Maximum extents reached condition，Space quota exceeded condition）
C. When a resumable statement is suspended, the transaction that contains the statement is also suspended.
D. A resumable statement can only be suspended and resumed once during the execution of the statement.
E. You can query the V$SESSION_WAIT dynamic performance view to identify the statements that are suspended for a session.

[多项选择]You have enabled backup optimization for the RMAN environment. Identify two criteria on which RMAN will skip the file， if it has already been backed up.（）
A.  The data file backup is done with multiple channels
B.  The data files is in the read-write mode after being backed up in the read only mode
C.  The backup was taken after the data files was taken offline-normal or is in the read only mode
D.  The data file backup complies with the back retention policy and the backup duplexing fe ture

[单项选择] You have enabled the Slow Query Log for a short period. When you process the Slow Query Log, you receive the following snip of output: Count: 100 Time=0 .22a (22s) Lock=0.00s (0s) Rows=0.0 (0), root[root] @localhost CREATE TABLE 't1' (id serial,id0 varchar(N) unique key,intcaoll INT (N) ,intco12 INT(N) ,intco13 INT(N) ,intco14 INT(N) ,intco15 INT(N) ,charcol1 VARVHAR(N) ,charcol2 VARCHAR(N) charcol3 VARCHAR (N) ,charcol4 VARVHAR(N) ,charcol5 VARCHAR(N) charcol6 VARCHAR (N) ,charcol7 VARVHAR(N) ,charcol8 VARCHAR(N) charcol9 VARCHAR (N) .charcol 10 VACHAR (N) ) Count: 64000 Time-0.02s (1213s) Lock=0.00s (6s) Rows=1.0 (64000), root [root]@ localhost SELECT intocl1, intco12, intco13, intco14, intco15, intco16,intco17, intco18 ,intcol9, intcol10, charcol1, charcol2, charcol3, charcol4, charcol5, charcol6 ,charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = 's' Count: 1 Time=0.02s (0s) Lock=0.00s (0s) Rows=1.0 (1) agent [agent] @localhost SELECT Select_priv, Repl_client_priv, Show_db_priv, Super_priv, Process_priv FROM mysql.user WHERE CONCAT (user, 's', host) = CURRENT_USER （　） Count: 48000 Time=0.02s (778s) Lock=0.00 (3s) Rows=1.0 (48000), root[root]@localhost SELECT intocl1,intcol2,intcol3, intcol4, intcol5, charcol1, charcol2, charcol3 ,charcol4, charcol5, charcol6, charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = 's' You want to tune the query such that it provides the greatest overall time savings. Which query will accomplish this?（）
A. CHEATE TABLE 't1' (id serial, id0 varchar (N) unique key, intcol1 INT (N) ,intcol2 INT (N), intcol3 INT(N) ,intcol4 INT(N), intcol5 INT(N), charool1 VARCHAR (N) ,charcol2 VARCHAR (N), charcol3 VARCHAR(N), charcol4 VARCHAR(N), charcol5 VARCHAR (N) ,charcol6 VARCHAR (N), charcol7 VARCHAR(N), charcol8 VARCHAR(N), charcol9 VARCHAR (N) ,charcol10 VARCHAR (N)
B. SELECT intcol1, intcol2, intcol3, intcol4, intcol5, intcol6, intcol7, intcol8, intcol9, Intcol10, intcol11, intcol12, intcol13, intcol14, intcol15, intcol16, intcol17, intcol18, intcol19, charcol10 FROM t1 WHERE id = 's'
C. SELECT Select_priv, Repl_client_priv, Show_db_priv, Super_priv, Process_priv FROM mysql.user WHERE CONCAT (user,'s', host) = CURRENT_USER()
D. SELECT intcol1, intcol2, intcol3, intcol4, intcol5, charcol1, charcol2, charcol3, charcol4, charcol5, charcol6, charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = 's'

[单项选择]Have you shut the windows

[单项选择] You perform a backup using the following BACKUP command: RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE; Which statement is true of this command?（）
A. A different procedure is required to restore a database from compressed backups
B. The AS COMPRESSED clause of the BACKUP command provided by RMAN is used to create compressed backup sets and image copies.
C. Using this command to create backups minimizes the bandwidth consumed
D. Using this command to create backups improves the performance of the backup process

[单项选择]Have you got（）lychees?
A. some
B. any
C. /

[单项选择]Have you ever received ______ of what have happened to her
A. the word
B. words
C. word
D. the words

[单项选择]（）have you been in this country
A. How long
B. How old
C. How many

[单项选择]How many Monkey King Stamps have you collected
A. No one
B. None
C. Nothing
D. Nobody

[单项选择]We ______ for you everywhere. Where have you been
A. have looked
B. looked
C. have been looking
D. are looking

[单项选择]Have you ever been in a situation _____ you know the other person is right yet you cannot agree with him
A. by which
B. that
C. in where
D. where

[单项选择]Have you any other reasons ______ the ones you just mentioned above
A. in addition to
B. beside
C. off
D. at addition with

[单项选择]Have you ever been in a situation, ______ you know the other person is right yet you cannot agree with him
A. by which
B. that
C. in where
D. where

[单项选择]Have you invited______