OCJP 1Z0-851 Exam

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Oracle University training and preparation:
Oracle Database: Program with PL/SQL
These earlier courses are still valid exam preparation tools but are no longer being scheduled:
Oracle Database 11g: Program with PL/SQL

Oracle Database 11g: Program with PL/SQL 1Z0-144
Exam Number/Code : 1Z0-144
Exam Name : Oracle Database 11g: Program with PL/SQL
Questions and Answers : 252Q&As
Update Time : 2012-2-10
Price : $79.00

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22.All of the following statements are true about an explicit cursor except for which one?
A. An explicit cursor can be declared in any declaration section of a PL/SQL block.
B. A cursor name is not a PL/SQL variable.
C. The name of an explicit cursor can be up to 30 characters in length.
D. Values can be assigned to a cursor.
Answer: D

23.Which of the following errors is raised when placeholders are put inside the overriding signature of
an INSERT statement?
A. ORA-01006
B. ORA-06502
C. ORA-00928
D. PLS-00049
Answer: C

25.All of the following statements about the RAISE_APPLICATION_ERROR procedure are true except
for which one?
A. RAISE_APPLICATION_ERROR is used to create a unique id for a user-defined exception.
B. RAISE_APPLICATION_ERROR raises an exception and handles it.
C. RAISE_APPLICATION_ERROR is a built-in procedure in oracle which is used to display the
userdefined error messages along with the error number.
D. Whenever a message is displayed using RAISE_APPLICATION_ERROR, all previous
transactions which are not committed within the PL/SQL block are rolled back automatically.
Answer: B

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Oracle Java Standard Edition 6 Programmer Certified Professional Exam OCJP 1Z0-851
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
Questions and Answers : 290Q&As
Update Time : 2012-1-10
Price : $79.00

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1.Given a pre-generics implementation of a method:
11.public static int sum(Listlist) {
12.int sum=0;
13.for(Iterator iter =list.iterator(); iter.has Next(); ){
14.int i =((Integer)iter.next()).int Value();
15.sum+=i;
16.}
17.return sum;
18.}
What three changes allow the class to be used with generics and avoid an uncheckedw arning?(Choose three.)
A.Remove line 14.
B.Replace line 14 with"int i =iter.next();".
C.Replace line 13 with"for(int i :intList) {".
D.Replace line 13 with"for(Iterator iter :intList) {".
E.Replace the method declaration with "sum(ListintList)".
F.Replace the method declaration with "sum(ListintList)".
Answer:A,C,F

2.A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add(0,object),but does NOT need to support quick random access.What supports these requirements.?
A.java.util.Queue
B.java.util.ArrayList
C.java.util.LinearList
D.java.util.LinkedList
Answer:D

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Oracle Java Standard Edition 6 Programmer Certified Professional Exam 1Z0-851
Exam Number/Code : 1Z0-851
Exam Name : Java Standard Edition 6 Programmer Certified Professional Exam
Questions and Answers : 290Q&As
Update Time : 2012-1-10
Price : $79.00

Oracle OCJP 1Z0-851 Exam Topics
Section 5: OO Concepts
Develop code that implements tight encapsulation, loose coupling, and high cohesion in classes, and describe the benefits.
Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.
Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods.
Given a scenario, develop code that declares and/or invokes overridden or overloaded methods and code that declares and/or invokes superclass, or overloaded constructors.
Develop code that implements "is-a" and/or "has-a" relationships.

Section 6: Collections / Generics
Given a design scenario, determine which collection classes and/or interfaces should be used to properly implement that design, including the use of the Comparable interface.
Distinguish between correct and incorrect overrides of corresponding hashCode and equals methods, and explain the difference between == and the equals method.
Write code that uses the generic versions of the Collections API, in particular, the Set, List, and Map interfaces and implementation classes. Recognize the limitations of the non-generic Collections API and how to refactor code to use the generic versions. Write code that uses the NavigableSet and NavigableMap interfaces.
Develop code that makes proper use of type parameters in class/interface declarations, instance variables, method arguments, and return types; and write generic methods or methods that make use of wildcard types and understand the similarities and differences between these two approaches.
Use capabilities in the java.util package to write code to manipulate a list by sorting, performing a binary search, or converting the list to an array. Use capabilities in the java.util package to write code to manipulate an array by sorting, performing a binary search, or converting the array to a list. Use the java.util.Comparator and java.lang.Comparable interfaces to affect the sorting of lists and arrays. Furthermore, recognize the effect of the "natural ordering" of primitive wrapper classes and java.lang.String on sorting.

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11.Given:
11.classAlpha{
12.publicvoidfoo() {System.out.print("Afoo");}
13.}
14.publicclassBetaextendsAlpha{
15.publicvoidfoo() {System.out.print("Bfoo");}
16.publicstaticvoidmain(String[]args){
17.Alphaa=newBeta();
18.Betab=(Beta)a;
19.a.foo();
20.b.foo();
21.}
22.
}
Whatis the result?
A.AfooAfoo
B.AfooBfoo
C.BfooAfoo
D.BfooBfoo
E.Compilationfails.
F.Anexceptionis thrownatruntime.
Answer:D

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