Oracle OCJP 1Z0-851 exam

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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

Free 1Z0-851 Demo Download

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(List<int>intList)".
F.Replace the method declaration with "sum(List<Integer>intList)".
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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