Oracle Other Oracle Certification 1Z0-501

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Simulation test system

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Oracle Java Certified Programmer Sample Questions:

1. Given:
1 . public class returnIt (
2 . returnType methodA(byte x, double y) (
3 . return (short) x/y * 2;
4 .)
5 . )
What is the valid returnType for methodA in line 2?

A) Int
B) Byte
C) Double
D) Long
E) Short
F) Float

2. CORRECT TEXT
Exhibit:
1 . Public class test (
2 . Public static void stringReplace (String text)(
3 .Text = text.replace ('j' , 'i');
4 . )
5 .
6 . public static void bufferReplace (StringBuffer text)(
7 .text = text.append ("C")
8 . )
9 .
1 0. public static void main (String args[]} (
1 1.String textString = new String ("java");
1 2.StringBuffer text BufferString = new StringBuffer ("java");
1 3.
1 4.stringReplace (textString);
1 5.BufferReplace (textBuffer);
1 6.
1 7.System.out.printIn (textString + textBuffer);
1 8.}
1 9.)
What is the output?

3. Exhibit:
1 . class A implements runable (
2 . int i;
3 . public void run () (
4 . try (
5 . thread.sleep(5000);
6 . i= 10;
7 .) catch(InterruptedException e) {}
8 .)
9 .)
1 0.
1 1. public class Test {
1 2. public static void main (string args[]) (
1 3. try (
1 4. A a = new A ();
1 5. Thread t = new Thread (a);
1 6. t.start();
1 7.
1 8. int j= a.i;
1 9.
2 0. ) catch (Exception e) {}
2 1. )
2 2. )
Which statement al line 17 will ensure that j=10 at line 19?

A) t.join();
B) t.notify();
C) t.wait();
D) t.interrupt();
E) t.yield();
F) a.wait();
G) a.notify();

4. CORRECT TEXT
Given
1 . Public class test (
2 .Public static void main (String args[])(
3 .System.out.printIn (6 ^ 3);
4 .)
5 .)
What is the output?

5. Given:
1 . public class ArrayTest {
2 . public static void main (String[]args){
3 . float f1[], f2[];
4 . f1 = new float [10];
5 . f2 = f1;
6 . System.out.printIn ("f2[0]=" + f2[0]);
7 .}
8 .}
What is the result?

A) An error at line 6 causes compile to fail.
B) An error at line 5 causes compile to fail.
C) It prints f2[0] = 0.0
D) An error at line 6 causes an exception at runtime.
E) It prints f2[0] = NaN

Solutions: