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Oracle Java Certified Programmer Sample Questions:
1. Given:
1. //point X
2 . public class foo (
3 . public static void main (String[]args) throws Exception {
4 . java.io.printWriter out = new java.io.PrintWriter (
5 . new java.io.outputStreamWriter (System.out), true;
6 . out.printIn("Hello");
7 . }
8 . }
Which statement at PointX on line 1 allows this code to compile and run?
A) Import java.io.PrintWriter;
B) Import java.io.*;
C) Include java.io.*;
D) Include java.io.PrintWriter;
E) No statement is needed.
2. What is the numerical range of a char?
A) Range is platform dependent.
B) 0 . . . 32767
C) -32768 . . . 32767
D) 0 . . . 65535
E) -256 . . . 255
3. Which method is an appropriate way to determine the cosine of 42 degrees?
A) Double d = Math.cosine(Math.toRadians(42));
B) Double d = Math.cos(Math.toRadians(42));
C) Double d = Math.cos(42);
D) Double d = Math.cos(Math.toDegrees(42));
E) Double d = Math.cosine(42);
4. Given:
8 . int index = 1;
9 . boolean[] test = new Boolean[3];
1 0. boolean foo= test [index];
What is the result?
A) Foo has the value of 0.
B) The code will not compile.
C) Foo has the value of null.
D) An exception is thrown.
E) Foo has the value of false.
F) Foo has the value of true.
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 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.
Solutions:
| Question # 1 Answer: E | Question # 2 Answer: D | Question # 3 Answer: B | Question # 4 Answer: E | Question # 5 Answer: D |







