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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

1. Given:
1 . public class test (
2 . public static void main (String args[]){
3 .int i = 0xFFFFFFF1;
4 .int j = ~i;
5 .
6 .}
7 . )
What is the decimal value of j at line 5?

A) An error at line 3 causes compilation to fail.
B) 1
C) -15
D) 14
E) An error at line 4 causes compilation to fail.
F) 0

2. CORRECT TEXT
Exhibit:
1 . public class X {
2 . public static void main (String[]args) {
3 . string s = new string ("Hello");
4 . modify(s);
5 . System.out.printIn(s);
6 .}
7 .
8 . public static void modify (String s){
9 . s += "world!";
1 0.}
1 1. }
What is the result?
E.The program runs and prints "Hello"
F.An error causes compilation to fail.
G.The program runs and prints "Hello world!"
H.The program runs but aborts with an exception.

3. You need to store elements in a collection that guarantees that no duplicates are stored and all elements can be accessed in natural order. Which interface provides that capability?

A) Java.util.Map.
B) Java.util.StoredSet.
C) Java.util.Collection.
D) Java.util.StoredMap.
E) Java.util.Set.
F) Java.util.List.

4. Given:
1 . public class SyncTest {
2 . private int x;
3 . private int y;
4 . public synchronized void setX (int i) (x=1;)
5 . public synchronized void setY (int i) (y=1;)
6 . public synchronized void setXY(int 1)(set X(i); setY(i);)
7 . public synchronized Boolean check() (return x !=y;)
8 . )
Under which conditions will check () return true when called from a different class?

A) Check() can only return true if SyncTest is changed to allow x and y to be set separately.
B) Check() can return true when multiple threads call setX and setY separately.
C) Check() can return true when setXY is called by multiple threads.
D) Check() can never return true.

5. Given:
1 . public class Test {
2 . public static void main (String []args){
3 . unsigned byte b = 0;
4 . b--;
5 .
6 .}
7 . }
What is the value of b at line 5?

A) Compilation will fail.
B) 127
C) -1
D) 255
E) Compilation will succeed but the program will throw an exception at line 4.

Solutions: