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QUESTION 1
Which options would you consider while configuring a flash recovery area (fast recovery area in 11g Release 2) for your production database that is running in ARCHIVELOG mode? (Choose all that apply.)

A. Setting the FAST_START_MTTR_TARGET to set the mean time to recover
B. Setting the RECOVERY_PARALLELISM parameter to twice the number of CPUs
C. Using the DB_RECOVERY_FILE_DEST parameter to set the location for flash recovery area
D. Using the DB_RECOVERY_FILE_DEST_SIZE parameter to define the disk space limit for the
recovery files created in the flash recovery area

Answer: CD

QUESTION 2
You want to take a complete database backup using RMAN. The backup should consist only the used blocks from your database.

Which two statements are true about this backup operation? (Choose two.)

A. Backup compression should be enabled
B. Parallelism for the channel should be set to 2
C. All the files must be backed up as backup sets
D. The backup may be stored either on disk or on media with media manager

Answer: CD

QUESTION 3
Which two statements are true about the Automatic Diagnostic Repository (ADR)? (Choose two.)

A. The ADR base keeps all diagnostic information in binary format
B. SQL*Plus provides the ADRI script, which can be used to work with ADR
C. The ADR can be used for problem diagnosis only when the database is open
D. The ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null
E. The ADR can be used for problem diagnosis even when the database instance is down
F. The ADR base is shared across multiple instances

Answer: EF

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QUESTION 1
Which of the following are correct? A REPLACE statement may be used…

A. … in place of a combination of DELETE and INSERT statements.
B. … when the replacement of rows must be done in one atomic operation.
C. … only on MyISAM tables.
D. … only by the root user.

Answer: AB

QUESTION 2
Is the following statement true or false? “Connector/ODBC can only connect to a MySQL server via TCP/IP; named pipes and sockets are not supported because they are operating system specific.”

A. true
B. false

Answer: B

QUESTION 3
Where should a MySQL Connector be installed?

A. On the client-side host.
B. On the MySQL server host.

Answer: A

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QUESTION NO: 1
A session bean calls the setRollbackOnly method on the EJBContext interface within a business method with an active transaction. Which two are correct? (Choose two.)

A. The transaction timeout is immediately disabled.
B. The container will ensure that the transaction will never commit.
C. The bean must have started the current transaction for this to be legal.
D. The bean must have bean-managed transaction demarcation for this to be legal.
E. Thebean must have container-managed transaction demarcation for this to be legal.

Answer: B,E

QUESTION NO: 2
A developer is working on a user registration application using EJB 3.0. A business method registerUser in stateless session bean RegistrationBean performs the user registration.
The registerUser method executes in a transaction context started by the client. If some invalid user data causes the registration to fail, the client invokes registerUser again with corrected data using the same transaction. Which design can meet this requirement?

A. Have registerUser method call EJBContext.setRollbackOnlyOmethodafter registration fails.
B. Have registerUser method throw javax.ejb.EJBTransactionRequiredExceptionafterregistration
fails.
C. HaveregisterUser method throw EJBException without marking the transaction for rollback, after registration fails.
D. Create an application exception withtherollbackattributeset to falseandhave registerUser method throwit afterregistration fails.

Answer: D

QUESTION NO: 3
Given:
11. @PersistenceContext EntityManager em;
12. public boolean test(Order o) {
13. boolean b = false;
14. o = em.merge(o);
15 em.remove(o);
16. o = em.merge(o);
17. b = em.contains(o);
18. return b;
19.}
Which statement is correct?

A. The method will return TRUE.
B. Themethod will return FALSE.
C. Themethodwill throw an exception.
D. TheOrder instance willberemoved from the database.

Answer: C

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QUESTION 1
A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion, they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself. What design issue has the team discovered?

A. Tight coupling
B. Low cohesion
C. High cohesion
D. Loose coupling
E. Weak encapsulation
F. Strong encapsulation

Answer: E

QUESTION 2
Given a method that must ensure that its parameter is not null:

11. public void someMethod(Object value) {
12. // check for null value
…
20. System.out.println(value.getClass());
21. }

What, inserted at line 12, is the appropriate way to handle a null value?

A. assert value == null;
B. assert value != null, “value is null”;
C. if (value == null) { throw new AssertionException(“value is null”); }
D. if (value == null) { throw new IllegalArgumentException(“value is null”); }

Answer: D

QUESTION 3
Given:

public class Target {
private int i = 0;
public int addOne() {
return ++i;
}
}

And:

public class Client {
public static void main(String[] args){
System.out.println(new Target().addOne());
}
}

Which change can you make to Target without affecting Client?

A. Line 4 of class Target can be changed to return i++;
B. Line 2 of class Target can be changed to private int i = 1;
C. Line 3 of class Target can be changed to private int addOne(){
D. Line 2 of class Target can be changed to private Integer i = 0;

Answer: D

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QUESTION NO: 1
Which technology is used to develop components that interact with server-side objects in a webbased
application?
A. XML
B. servlets
C. HTML
D. JavaScript
Answer: B

QUESTION NO: 2
Which is true?
A. JSP developers must learn Java programming to create JavaServer Pages.
B. JavaServer Pages are translated into servlets before they are executed.
C. JSP technology output is never displayed to clients.
D. JSP is defined as JavaScript Pages.
Answer: B

QUESTION NO: 3
Which three compile without error? (Choose three.)
A. String str = ‘Hello’;
B. String str = “Hello”;
C. String str = “Hello” – ” World!”;
D. String str = new String(“Hello”);
E. String str = “Hello” + ” World!”;
F. String str = new String(‘Hello’);
Answer: B,D,E

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Zertifizierungsprüfung 1Z0-821 Oracle

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QUESTION NO: 1
The advantage of core tiles is that they allow you an opportunity to examine the cause of
problems, so that they can be resolved.
However, core files must be managed because they_____.

A. take up large amounts of disk space
B. make numerous entries into the /var/adm/wtmpx file
C. steal resources from the processor, slowing down system performance
D. fill up swap space; this will begin to slow the system due to swaps
E. fill up swap space; this will begin to slow the system due to paging

Answer: A

Explanation: Part of the job of cleaning up heavily loaded file systems involves locating and removing files that have not been used recently. You can locate unused files by using the ls or find commands.
Other ways to conserve disk space include emptying temporary directories such as the directories located in /var/tmp or /var/spool, and deleting core and crash dump files.
Note: Core files are generated when a process or application terminates abnormally. Core files are managed with the coreadm command.
For example, you can use the coreadm command to configure a system so that all process core files are placed in a single system directory. This means it is easier to track problems byexamining the core files in a specific directory whenever a process or daemon terminates abnormally.
Reference: Oracle Solaris Administration: Common Tasks, Finding and Removing Old or Inactive Files

QUESTION NO: 2
The line
set noexec_user_stack= l
should be added to the /etc/system file to prevent an executable stack while executing user programs. What is the purpose of this?

A. help prevent core dumps on program errors
B. help programs to execute more quickly by keeping to their own memory space
C. log any messages into the stack log
D. help make buffer-overflow attacks more difficult

Answer: D

Explanation: How to Disable Programs From Using Executable Stacks
Purpose: Prevent executable stack from overflowing.
You must be in the root role.
Edit the /etc/system file, and add the following line:
set noexec_user_stack=1
Reboot the system.
# reboot
Reference: How to Disable Programs From Using Executable Stacks

QUESTION NO: 3
User jack makes use of the bash shell; his home directory is/export/home/jack.
What is the correct setting of umask, and where should it be set, to allow jack to create a shell script using the vi editor, that is executable by default?

A. It is not possible to make a script executable without using the chmod command.
B. umask value of 0002 set in /etc/profile
C. umask value of 0002 set in /export/home/jack/.bashrc
D. umask value of 0722 set in /etc/profile
E. umask value of 0722 set In /export/home/jack/.bashrc

Answer: B

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