Oracle 1Z0-501

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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

Question #1
Given:
1 . switch (i){
2 . default:
3 . System.out.printIn("Hello");
4 . )
What are the two acceptable types for the variable i? (Choose Two)

A. Double
B. Float
C. Object
D. Char
E. Byte

Question #2
Which constructs a BufferedIputStream?

A. New BufferedInputStream(new Writer("in.txt"));
B. New BufferedInputStream(new File("in.txt"));
C. New BufferedInputStream(new Writer("in.txt"));
D. New BufferedInputStream(new FileInputStream("in.txt"));
E. New BufferedInputStream(new InputStream("in.txt"));
F. New BufferedInputStream("in.txt");

Question #3
Exhibit:
1 . public class X {
2 . public static void main (String[]args){
3 . int [] a = new int [1]
4 . modify(a);
5 . System.out.printIn(a[0]);
6 .}
7 .
8 . public static void modify (int[] a){
9 .a[0] ++;
1 0.}
1 1. }
What is the result?

A. An error "possible undefined variable" at line 9 causes compilation to fail.
B. An error "possible undefined variable" at line 4 causes compilation to fail.
C. The program runs and prints "0"
D. The program runs and prints "1"
E. The program runs but aborts with an exception.

Question #4
Exhibit:
1 . int I=1, j=0
2 .
3 . switch(i){
4 . case 2:
5 . j+=6;
6 .
7 . case 4:
8 . j+=1;
9 .
1 0. default:
1 1. j +=2;
1 2.
1 3. case 0:
1 4. j +=4;
1 5. }
1 6.
What is the value of j at line 16?

A. 1
B. 6
C. 2
D. 0
E. 4

Question #5
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 return true when multiple threads call setX and setY separately.
B. Check() can only return true if SyncTest is changed to allow x and y to be set separately.
C. Check() can never return true.
D. Check() can return true when setXY is called by multiple threads.

Solutions: