单选题Given that the current directory is empty， and that the user has read and write privileges to the current directory， and the following： Which statement is true？（）ACompilation fails.BNothing is added to the file system.COnly a new file is created on th

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第2题：

Which statements are true， given the code new FileOutputStream（"data"， true） for creating an object of class FileOutputStream？（）  

• A、FileOutputStream has no constructors matching the given arguments.
• B、An IOExeception will be thrown if a file named "data" already exists.
• C、An IOExeception will be thrown if a file named "data" does not already exist.
• D、If a file named "data" exists， its contents will be reset and overwritten.
• E、If a file named "data" exists， output will be appended to its current contents.

第3题：

A file named "core" exists in the current directory.  Which of the following commands should be used to determine what created the "core" file?（）

• A、 dump -t core 
• B、 strings core 
• C、 trace -a core 
• D、 crash core /unix_up

第4题：

Given a portion of a valid Java EE web application’s directory structure：MyApp | |--Directory1 ||--File1.html| |--META-INF|  |--File2.html| |--WEB-INF |--File3.html You want to know whether File1.html， File2.html，and/or File3.html is protected from direct access by yourweb client’s browsers. What statement is true？（）

• A、All three files are directly accessible.
• B、Only File1.html is directly accessible.
• C、Only File2.html is directly accessible.
• D、Only File3.html is directly accessible.

第5题：

10. class MakeFile {  11. public static void main（String[] args） {  12. try {  13. File directory = new File（”d”）；  14. File file = new File（directory，”f”）；  15. if（!file.exists（）） {  16. file.createNewFile（）；  17. }  18. } catch （IOException e） {  19. e.printStackTrace  20. }  21. }  22. }  The current directory does NOT contain a directory named “d.” Which three are true？（）

• A、 Line 16 is never executed.
• B、 An exception is thrown at runtime.
• C、 Line 13 creates a File object named “d”.
• D、 Line 14 creates a File object named “f‟.
• E、 Line 13 creates a directory named “d” in the file system.
• F、 Line 16 creates a directory named “d” and a file  “f”  within it in the file system.
• G、 Line 14 creates a file named "f " inside of the directory named “d” in the file system.

第6题：

Examine the following command; ALTER SYSTEM SET enable_ddl_logging = TRUE; Which statement is true?（）

• A、Only the data definition language (DDL) commands that resulted in errors are logged in the alert log file.
• B、All DDL commands are logged in the alert log file.
• C、All DDL commands are logged in a different log file that contains DDL statements and their execution dates.
• D、Only DDL commands that resulted in the creation of new segments are logged.
• E、All DDL commands are logged in XML format in the alert directory under the Automatic Diagnostic Repository (ADR) home.

第7题：

In which of the following scenarios is a tablespace recovery required？（）

• A、 when recovering a lost read-only tablespace from a read-only tablespace backup
• B、 when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in  ARCHIVELOG mode
• C、 when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in  NOARCHIVELOG mode and the changes in the online redo log files have been overwritten
• D、 when recovering a lost read-only tablespace from a read-only tablespace backup using the backup of the control file， the control file was created using the ALTER DATABASE BACKUP CONTROLFILE TO TRACE statement， and this statement was issued when the tablespace was read-only

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第13题：

Given a portion of a valid Java EE web application’s directory structure： MyApp | |-- File1.html | |-- Directory1 ||-- File2.html| |-- META-INF |-- File3.html You want to know whether File1.html， File2.html， and/or File3.html will be directly accessible by your webclient’s browsers. Which statement is true？（）

• A、All three files are directly accessible.
• B、Only File1.html is directly accessible.
• C、Only File2.html is directly accessible.
• D、Only File3.html is directly accessible.
• E、Only File1.html and File2.html are directly accessible.

第14题：

A user is attempting to access files shared on a remote computer. The file share permissions allow the user to have full control; however, the NTFS permissions allow the user to have read access. Which of the following is the user’s resulting access level for the remotely shared directory?（）

• A、Modify
• B、Full control
• C、Write
• D、Read

第15题：

Which determines if “prefs” is a directory and exists on the file system？（）  

• A、 Boolean exists=Directory.exists （“prefs”）；
• B、 Boolean exists=（new File（“prefs”））.isDir（）；
• C、 Boolean exists=（new Directory（“prefs”））.exists（）；
• D、 Boolean exists=（new File（“prefs”））.isDirectory（）；
• E、 Boolean exists=true；  Try{  Directory d = new Directory（“prefs”）；  } catch （FileNotFoundException e） {  exists = false；  }

第16题：

Given that file is a reference to a File object that represents a directory， which code fragments will succeed in obtaining a list of the entries in the directory？（）  

• A、Vector filelist = （（Directory） file）.getList（）；
• B、String[] filelist = file.directory（）；
• C、Enumeration filelist = file.contents（）；
• D、String[] filelist = file.list（）；
• E、Vector filelist = （new Directory（file））.files（）；

第17题：

Examine the following command:ALTER SYSTEM SET enable_ddl_logging=FALSE;Which statement is true?（）

• A、None of the data definition language (DDL) statements are logged in the trace file.
• B、Only DDL commands that resulted in errors are logged in the alert log file.
• C、A new log.xml file that contains the DDL statements is created, and the DDL command details are removed from the alert log file.
• D、Only DDL commands that resulted in the creation of new database files are logged.

第18题：

Given the following directory structure： bigProject |--source ||--Utils.java| |--classes |-- And the following command line invocation： javac -d classes source/Utils.java Assume the current directory is bigProject，what is the result？（）

• A、If the compile is successful， Utils.class is added to the source directory.
• B、The compiler returns an invalid flag error.
• C、If the compile is successful， Utils.class is added to the classes directory.
• D、If the compile is successful， Utils.class is added to the bigProject directory.

第19题：

In which scenario will you issue the following command？（）      SQL> RECOVER DATABASE UNTIL TIME ’2005-10-04 ： 12：09：08’ USING        BACKUP CONTROLFILE；

• A、 when all the control files are missing and only a binary backup of the current control file exists
• B、 when a multiplexed copy of the current control file is missing
• C、when all the control files are missing and only a script containing the CREATE CONTROLFILE statement exists
• D、 when the SPFILE is missing

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