Given two files, GrizzlyBear.java and Salmon.java: <img src="https://img.ppkao.com/2018-08/longzhengxuan/201808020851434439.jpg" /> If both classes are in the correct directories for their packages, and the Mammal class correctly defines the findSalmon() method, which change allows this code to compile?（） Given two files, GrizzlyBear.java and Salmon.java: <img src="https://img.ppkao.com/2018-08/longzhengxuan/201808020851434439.jpg" /> If both classes are in the correct directories for their packages, and the Mammal class correctly defines the findSalmon() method, which change allows this code to compile?（）..

第1题

[单选题] You issued the following commands to configure setting in RMAN; Then you issued the following command to take the backup: RMAN> BACKUP DATABASE PLUS ARCHIVELOG; Which statement is true about the execution of the above command?（）

A、The backup will terminate because the FORMAT clause was not configured for the channel B、It backs up two copies of data files to tape and disk, and two copies of archived log file on tape C、It backs up the data files and archived log files to disk, making two copies of each data file and archived log file D、It backs up the data files and archived log files to tape, making two copies of each data file and archived log file

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第2题

[多选题] You are using the control file to maintain information about the database backups that are being performed by Recovery Manager (RMAN).Identify two scenarios is which you must have a recovery catalog. （）(Choose two.)

A、To store the backup information of multiple database B、To restrict the amount of space that is used by the backups C、To maintain a backup for a certain time is set by the CONTROL_FILE_RECORD_KEEP_TIME parameter. D、To list the data files that were in a target database at a given time by using the AT option of REPORT SCHEMA command.

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第3题

[单选题] You issued the following commands to configure setting in RMAN; RMAN> CONFIGURE DEVICE TYPE sbt PARALLELISM 1; RMAN> CONFIGURE DEFAULT DEVICE TYPE TO sbt; RMAN> CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE sbt TO 2; RMAN> CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE sbt TO 2; RMAN> CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2; Then you issued the following command to take the backup: RMAN> BACKUP DATABASE PLUS ARCHIVELOG; Which statement is true about the execution of the above command?（）

A、The backup will terminate because the FORMAT clause was not configured for the channel B、It backs up two copies of data files to tape and disk, and two copies of archived log file on tape C、It backs up the data files and archived log files to disk, making two copies of each data file and archived log file D、It backs up the data files and archived log files to tape, making two copies of each data file and archived log file

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第4题

[] The database is configured in ARCHIVELOG mode and regular complete database backups are taken. Theloss of which two types of files may require a recovery with the RESETLOGS option? （）(Choose two)

A、A. Control files B、B. Password files C、C. Inactive online redo log file D、D. Archived log files required to perform recovery E、E. Newly created tablespace which is not backed up

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第5题

[多选题] You performed the RMAN database backup with the KEEP option.Which two statements are true about this backup?（） (Choose two)

A、The KEEP option overrides the configured retention policy B、The KEEP option is an attribute of an individual backup piece C、The backup contains only data files and archived redo log files D、The backup contains data files, the server parameter file and the control file even if the control file auto backup is disabled

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第6题

[单选题] Given classes defined in two different files:What is required at line 5 in class SomeApp to use the process method of BitUtils?（）

A、process(bytes); B、BitUtils.process(bytes); C、util.BitUtils.process(bytes); D、SomeApp cannot use methods in BitUtils. E、import util.BitUtils.*; process(bytes);

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第7题

[] Given that the current directory is empty, and that the user has read and write privileges to the current, and the following: Which statement is true?（） Given that the current directory is empty, and that the user has read and write privileges to the current, and the following: Which statement is true?（）

A、A.Compilation fails. B、B.Nothing is added to the file system. C、C.Only a new file is created on the file system. D、D.Only a new directory is created on the file system. E、E.Both a new file and a new directory are created on the file system.

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第8题

[单选题] Given classes defined in two different files： What is the result of executing XMLMessage.main？（）

A、text B、Compilation fails. C、<msg>text</msg> D、An exception is thrown at runtime.

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第9题

[] Given: Which two methods, inserted independently at line 17, correctly complete the Sales class?（） Given: Which two methods, inserted independently at line 17, correctly complete the Sales class?（）

A、A.double getSalesAmount() { return 1230.45; } B、B.public double getSalesAmount() { return 1230.45; } C、C.private double getSalesAmount() { return 1230.45; } D、D.protected double getSalesAmount() { return 1230.45; }

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