Practicetest 1Z0-872 Oracle cert24

Practicetest 1Z0-872 Oracle cert24

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Practicetest 1Z0-872 Oracle cert24

QUESTION 1
Complete the following sentence. The infofmation_schema. schemata table contains information about

A. the table structure for all databases.
B. all of the tables, triggers and views for every database.
C. all of the databases on the server, such as name, character set and collation.
D. every database’s structure including tables, triggers, stored routines, views, etc.

Answer: C

QUESTION 2
Will the following select query list all of the tables in the information_schema database? If not, why?

SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA =
‘INFORMATION_SCHEMA’ ORDER BY TABLE_NAME

A. Yes.
B. No; the INFORMATION_SCHEMA database does not contain information on itself.
C. No; the WHERE clause is incorrect. The correct field name is TABLE_SCHEMATA.
D. No; there is no table in the INFORMATION SCHEMA database called TABLES.

Answer: A

QUESTION 3
Which of the following methods can be used to find out which character sets are in use across the server?

A. SHOW CHARACTER SETS
B. Use the INFORMATION_SCHEMA.COLUMNS table
C. This can not be done

Answer: B

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Practicetest 1Z0-871 Oracle cert24

Practicetest 1Z0-871 Oracle cert24

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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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Practicetest 1Z0-860 Oracle cert24

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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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Practicetest 1Z0-851 Oracle cert24

Practicetest 1Z0-851 Oracle cert24

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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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Practicetest 1Z0-821 Oracle cert24

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1Z0-821 Oracle Solaris 11 System Administrator our products come with a 100% guarantee of success. We hold this claim because of the highly dedicated and expert team that we have and because of our past performance.

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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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QUESTION NO: 1
Given:
import java.io.File;
import java.nio.file.Path;
public class Test12 {
static String displayDetails(String path, int location) {
Path p = new File(path).toPath();
String name = p.getName(location).toString();
return name;
}
public static void main(String[] args) {
String path = “project//doc//index.html”;
String result = displayDetails(path,2);
System.out.print(result);
}
}
What is the result?

A. doc
B. index.html
C. an IllegalArgumentException is thrown at runtime.
D. An InvalidPthException is thrown at runtime.
E. Compilation fails.

Answer: B

QUESTION NO: 2
Given the code fragment:
public void otherMethod() {
printFile(“”);
}
public void printFile(String file) {
try (FileInputStream fis = new FileInputStream(file)) {
System.out.println (fis.read());
} catch (IOException e) {
e.printStackTrace();
}
Why is there no output when otherMethod is called?

A. An exception other than IOException is thrown.
B. Standard error is not mapped to the console.
C. There is a compilation error.
D. The exception is suppressed.

Answer: D

Explanation: The code compiles fine
The line FileInputStream fis = new FileInputStream(file))
will fail at runtime since file is an empty string.
Note:
public void printStackTrace()
Prints this throwable and its backtrace to the standard error stream.

QUESTION NO: 3
Given the code fragment:
public void ReadFile (String source) {
char[] c = new char [128];
int cLen = c.length;
try (FileReader fr = new FileReader (source)) {
int count = 0;
int read = 0;
while ((read = fr.read(c)) != -1) {
count += read;
}
System.out.println(“Read: ” + count + ” characters.”);
} catch (IOException i) {
}
What change should you make to this code to read and write strings instead of character arrays?

A. ChangeFileReader to Readers.
B. ChangeFileReader to DataReader.
C. ChangeFileReader to File.
D. ChangeFileReader to BufferReader.

Answer: D

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QUESTION NO: 1
Given:
class Overloading {
int x(double d) {
System.out.println(“one”);
return 0;
}
String x(double d) {
System.out.println(“two”);
return null;
}
double x(double d) {
System.out.println(“three”);
return 0.0;
}
public static void main(String[] args) {
new Overloading().x(4.0)
}
}
What is the result?

A. One
B. Two
C. Three
D. Compilation fails

Answer: D

Explanation: overloading of the x method fails as the input argument in all three cases are
double.
To use overloading of methods the argument types must be different.
Note: The Java programming language supports overloading methods, and Java can distinguish between methods with different method signatures. This means that methods within a class can have the same name if they have different parameter lists

QUESTION NO: 2
The catch clause argument is always of type___________.

A. Exception
B. Exception but NOT including RuntimeException
C. Throwable
D. RuntimeException
E. CheckedException
F. Error

Answer: C

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Practicetest 1Z0-591 Oracle cert24

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QUESTION NO: 1
Object Security controls access to Subject Areas, Tables, and Columns in OBIEE and can be implemented by using which method?

A. Single Sign-On (SSO)
B. Database Authentication
C. Business Logic Object Security
D. External Table Authentication
E. LDAP Authentication

Answer: C

Explanation: Object-level security controls the visibility to business logical objects based on a user’s role. You can set up object-level security for metadata repository objects, such as subject areas and presentation folders, and for Web objects, such as dashboards and dashboard pages, which are defined in the Presentation Catalog.
1) Business logic object
This controls access to objects, such as:
* subject areas
* presentation tables
* presentation columns
For example, users in a particular department can view only the subject areas that belong to their department.
2) Web object security
This provides security for objects stored in the Web Catalog, such as dashboards, dashboard pages, folders, and reports. You can view only the objects for which you are authorized. For example, a mid-level manager may not be granted access to a dashboard containing summary information for an entire department.

QUESTION NO: 2
Which two steps are needed to set up Failover support for an OBIEE deployment?

A. Use Installer to affect Horizontal scale out of an existing instance
B. Employ WebLogic Enterprise Edition, licensed separately
C. Use Installer to set up separate single instances, then apply Horizontal scale out clustering
D. Apply OBIEE Clustering option
E. Leverage spare hardware capacity of single machine by using Verticalscale out option

Answer: A,D

Explanation: Horizonal Scaleout of System Components
* Used for adding additional managed servers (Java components) and
system components to an existing cluster
* Used for scalability and failover
* Set up via the Universal Installer > Scale Out BI System option

QUESTION NO: 3
When creating an initialization Block, which BI Administration function is used?
A. Variable Manager
B. Job Manager
C. Identity Manager
D. Projects Manager

Answer: A

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Practicetest 1Z0-536 Oracle cert24

Practicetest 1Z0-536 Oracle cert24

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1Z0-536 Oracle Exadata 11g Essentials our products come with a 100% guarantee of success. We hold this claim because of the highly dedicated and expert team that we have and because of our past performance.

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QUESTION NO: 1
When do you specify the type of interleaving for a grid disk?

A. When you create the cell disk
B. When you create the grid disk
C. Through ASM
D. When you create a tablespace

Answer: C

Explanation: Automatic Storage Management (ASM) is the storage management foundation of Exadata. ASM virtualizes the storage resources and provides the advanced volume management and file system capabilities of Exadata. Striping database files evenly across the available Exadata cells and disks results in uniform I/O load across all the storage hardware. The ability of ASM to perform non-intrusive resource allocation, and reallocation, is a key enabler of the shared grid storage capabilities of Exadata environments. And the ASM mirroring and failure group functionality provides much of the data protection and resiliency across the Exadata environment.
With ASM, data is mirrored across cells to ensure high availability in the event of cell failure.

http://www.pythian.com/news/17905/physical-disk-cell-disk-grid-disk-and-asm-disk-in-exadata/

QUESTION NO: 2
Why would you reduce the default disk_repair_time parameter?

A. To extend the availability of your ASM disk groups.
B. To reduce the need for high redundancy
C. To reduce the amount of data collected for a fast resynch
D. To increase performance of an Exadata Storage Server.

Answer: C

Practicetest 1Z0-536 Oracle cert24