Oracle 1Z0-853 Actual Free Exam Questions & Community Discussion

Exam Code/Number: 1Z0-853
Exam Name/Title: Java Standard Edition 5 Programmer Certified Professional Exam
Certification Provider: Oracle
Corresponding Certification: OCJP

Exam Questions: 362
Updated On: May 27, 2026

Question #1

DRAG DROP
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Discussion 0

Correct Answer:

Question #2

Given:
10.
interface A { public int getValue(); }
11.
class B implements A {
12.
public int getValue() { return 1; }
13.
}
14.
class C extends B {
15.
// insert code here
16.
}
Which three code fragments, inserted individually at line 15, make use of polymorphism? (Choose three.)

A. public void add(C c1, C c2) { c1.getValue(); }

B. public void add(B b) { b.getValue(); }

C. public void add(A a) { a.getValue(); }

D. public void add(C c) { c.getValue(); }

E. public void add(A a, B b) { a.getValue(); }

Discussion 0

Correct Answer: B,C,E Vote an answer

Question #3

Given:
11.
class A {
12.
public void process() { System.out.print("A,"); }
13.
class B extends A {
14.
public void process() throws IOException {
15.
super.process();
16.
System.out.print("B,");
17.
throw new IOException();
18.
}
19.
public static void main(String[] args) {
20.
try { new B().process(); }
21.
catch (IOException e) { System.out.println("Exception"); }
What is the result?

A. A,B,Exception

B. Exception

C. Compilation fails because of an error in line 20.

D. Compilation fails because of an error in line 14.

E. A NullPointerException is thrown at runtime.

Discussion 0

Correct Answer: D Vote an answer

Question #4

Which two classes correctly implement both the java.lang.Runnable and the
java.lang.Clonable interfaces? (Choose two.)

A. public class Session
extends Runnable, Clonable {
public void run() { /* do something */ }
public Object clone() { /* make a copy */ }

B. public class Session
implements Runnable, Clonable {
public void run() { /* do something */ }
public Object clone() { /* make a copy */ }

C. public abstract class Session
implements Runnable, Clonable {
public void run() { /* do something */ }
public Object clone() { /*make a copy */ }

D. public class Session
implements Runnable, Clonable {
public void run();
public Object clone();
}

E. public class Session
implements Runnable, implements Clonable {
public void run() { /* do something */ }
public Object clone() { /* make a copy */ }

Discussion 0

Correct Answer: B,C Vote an answer

Question #5

Given:
10. interface Jumper { public void jump(); } ...
20. class Animal {} ...
30.
class Dog extends Animal {
31.
Tail tail;
32.
} ...
40.
class Beagle extends Dog implements Jumper{
41.
public void jump() {}
42.
} ...
50.
class Cat implements Jumper{
51.
public void jump() {}
52.
}
Which three are true? (Choose three.)

A. Beagle has-a Jumper

B. Cat is-a Jumper

C. Beagle has-a Tail

D. Dog is-a Jumper

E. Cat is-a Animal

F. Dog is-a Animal

G. Cat has-a Animal

Discussion 0

Correct Answer: B,C,F Vote an answer

Question #6

Given a class Repetition:
1.package utils;
2.3.
public class Repetition {
4.public static String twice(String s) { return s + s; }
5.}
and given another class Demo:
1.// insert code here
2.3.
public class Demo {
4.public static void main(String[] args) {
5.System.out.println(twice("pizza"));
6.}
7.}
Which code should be inserted at line 1 of Demo.java to compile and run Demo to print "pizzapizza"?

A. static import utils.Repetition.*;

B. static import utils.Repetition.twice;

C. import utils.Repetition.*;

D. import utils.Repetition.twice();

E. import static utils.Repetition.twice;

F. static import utils.*;

G. import utils.*;

Discussion 0

Correct Answer: E Vote an answer

Question #7

Given:
11.
class Animal { public String noise() { return "peep"; } }
12.
class Dog extends Animal {
13.
public String noise() { return "bark"; }
14.
}
15.
class Cat extends Animal {
16.
public String noise() { return "meow"; }
17.
} ...
30.
Animal animal = new Dog();
31.
Cat cat = (Cat)animal;
32.
System.out.println(cat.noise());
What is the result?

A. meow

B. peep

C. Compilation fails.

D. bark

E. An exception is thrown at runtime.

Discussion 0

Correct Answer: E Vote an answer

Question #8

Given:
10.
abstract class A {
11.
abstract void a1();
12.
void a2() { }
13.
}
14.
class B extends A {
15.
void a1() { }
16.
void a2() { }
17.
}
18.
class C extends B { void c1() { } }
and:
A x = new B(); C y = new C(); A z = new C();
What are four valid examples of polymorphic method calls? (Choose four.)

A. x.a1();

B. x.a2();

C. z.a1();

D. z.c1();

E. z.a2();

F. y.c1();

Discussion 0

Correct Answer: A,B,C,E Vote an answer

Question #9

Given:
10.
public class Bar {
11.
static void foo( int... x ) {
12.
// insert code here
13.
}
14.
}
Which two code fragments, inserted independently at line 12, will allow the class to compile? (Choose two.)

A. for( int i=0; i< x.length; i++ ) System.out.println(x[i]);

B. foreach( x ) System.out.println(z);

C. for( int z : x ) System.out.println(z);

D. while( x.hasNext() ) System.out.println( x.next() );

Discussion 0

Correct Answer: A,C Vote an answer

Question #10

DRAG DROP
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Question #11

Given:
1.public class Blip {
2.protected int blipvert(int x) { return 0; }
3.}
4.class Vert extends Blip {
5.// insert code here
6.}
Which five methods, inserted independently at line 5, will compile? (Choose five.)

A. public int blipvert(int x) { return 0; }

B. protected long blipvert(int x, int y) { return 0; }

C. private int blipvert(long x) { return 0; }

D. protected long blipvert(int x) { return 0; }

E. protected int blipvert(long x) { return 0; }

F. private int blipvert(int x) { return 0; }

G. protected long blipvert(long x) { return 0; }

Discussion 0

Correct Answer: A,B,C,E,G Vote an answer

Question #12

Given:
1.public class TestSeven extends Thread {
2.private static int x;
3.public synchronized void doThings() {
4.int current = x;
5.current++;
6.x = current;
7.}
8.public void run() {
9.doThings();
10.
}
11.}
Which statement is true?

A. Compilation fails.

B. Wrapping the statements within doThings() in a synchronized(new Object()) { } block would make the class thread-safe.

C. Synchronizing the run() method would make the class thread-safe.

D. Declaring the doThings() method as static would make the class thread-safe.

E. The data in variable "x" are protected from concurrent access problems.

F. An exception is thrown at runtime.

Discussion 0

Correct Answer: D Vote an answer

Question #13

DRAG DROP
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Question #14

Given:
10.
abstract public class Employee {
11.
protected abstract double getSalesAmount();
12.
public double getCommision() {
13.
return getSalesAmount() * 0.15;
14.
}
15.
}
16.
class Sales extends Employee {
17.
// insert method here
18.
}
Which two methods, inserted independently at line 17, correctly complete the Sales class? (Choose two.)

A. public double getSalesAmount() { return 1230.45; }

B. private double getSalesAmount() { return 1230.45; }

C. double getSalesAmount() { return 1230.45; }

D. protected double getSalesAmount() { return 1230.45; }

Discussion 0

Correct Answer: A,D Vote an answer

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