Oracle 1Z0-501 : Java Certified Programmer

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Oracle Java Certified Programmer Sample Questions:

1. Exhibit:
ClassOne.java
1. package com.abc.pkg1;
2. public class ClassOne {
3. private char var = 'a';
4. char getVar() {return var;}
5. } ClassTest.java
1 . package com.abc.pkg2;
2 . import com.abc.pkg1.ClassOne;
3 . public class ClassTest extends ClassOne {
4 . public static void main(String[]args){
5 .char a = new ClassOne().getVar();
6 .char b = new ClassTest().getVar();
7 .}
8 . }
What is the result?

A) Compilation succeeds and no exceptions are thrown.
B) Compilation succeeds but an exception is thrown at line 6 in ClassTest.java.
C) Compilation succeeds but an exception is thrown at line 5 in ClassTest.java.
D) Compilation will fail.

2. Given:
1 . public class Test {
2 . public static void main (String args[]) {
3 .class Foo {
4 .public int i = 3;
5 .}
6 .Object o = (Object) new Foo();
7 .Foo foo = (Foo)o;
8 .System.out.printIn(foo. i);
9 .}
1 0. }
What is the result?

A) Compilation will succeed but the program will throw a ClassCastException at line 6.
B) Compilation will succeed and the program will print "3"
C) Compilation will fail.
D) Compilation will succeed but the program will throw a ClassCastException at line 7.

3. You want a class to have access to members of another class in the same package. Which is the most restrictive access modifier that will accomplish that will accomplish this objective?

A) Transient
B) No access modifier is required.
C) Public
D) Protected
E) Private

4. Which code determines the int value foo closest to a double value bar?

A) Int foo = (int) Math.floor(bar);
B) Int foo = (int) Math.max(bar);
C) Int foo = (int) Math.abs(bar);
D) Int foo = (int) Math.min(bar);
E) Int foo = (int) Math.round(bar);
F) Int foo = (int) Math.ceil(bar);

5. Given:
8 . int index = 1;
9 . boolean[] test = new Boolean[3];
1 0. boolean foo= test [index];
What is the result?

A) An exception is thrown.
B) Foo has the value of 0.
C) The code will not compile.
D) Foo has the value of null.
E) Foo has the value of true.
F) Foo has the value of false.

Solutions: