EXPERTY DESIGNED 1Z0-829 PRACTICE TEST

Oracle 1Z0-829 Exam Questions
Total Questions: 660
Java SE 17 Developer
Updated On: Jan 05, 2026
Page : 1-66
Question 1

Question ID: UK8298570
Consider below code of Test.java file:
package com.examtest.ocp; 
 
public class Test extends String {
    @Override
    public String toString() {
        return "TEST";
    }
    
    public static void main(String[] args) {
        Test obj = new Test();
        System.out.println(obj);
    }
}
What is the result?

Options :
Answer: D

Question 2

Question ID: UK8297722
Given code of Test.java file:
package com.examtest.ocp;
 
interface Rideable {
    void ride(String name);
}
 
class Animal {}
 
class Horse extends Animal implements Rideable {
    public void ride(String name) {
        System.out.println(name.toUpperCase() + " IS RIDING THE HORSE");
    }
}
 
public class Test {
    public static void main(String[] args) {
        Animal horse = new Horse();
        /*INSERT*/
    }
}
Which of the following options, if used to replace /*INSERT*/, will compile successfully and on execution will print EMMA IS RIDING THE HORSE on to the console?
Choose 4 options.

Options :
Answer: A,C

Question 3

Question ID: UK8294673
Consider below code of Test.java file:
package com.examtest.ocp;
 
abstract class Log {
    abstract long count(); //Line n1
    abstract Object get(); //Line n2
}
 
class CommunicationLog extends Log {
    int count() { //Line n3
        return 100;
    }
    
    String get() { //Line n4
        return "COM-LOG";
    }
}
 
public class Test {
    public static void main(String[] args) {
        Log log = new CommunicationLog(); //Line n5
        System.out.print(log.count());
        System.out.print(log.get());
    }
}
Which of the following statement is correct?

Options :
Answer: A

Question 4

Question ID: UK8297279
Consider below code of Test.java file:
package com.examtest.ocp;
 
public class Test {
    public static void main(String [] args) {
        boolean flag1 = true;
        boolean flag2 = false;
        boolean flag3 = true;
        boolean flag4 = false;
        
        System.out.println(!flag1 == flag2 != flag3 == !flag4); //Line n1
        System.out.println(flag1 = flag2 != flag3 == !flag4); //Line n2
    }
}
What is the result?

Options :
Answer: A

Question 5

Question ID: UK8292478
Given code of Test.java file:
package com.examtest.ocp;
 
import java.util.Arrays;
 
public class Test {
    public static void main(String[] args) {
        int [] array1 = {};
        int [] array2 = {100, 200};
        System.out.print(Arrays.compare(array1, array2));
        System.out.print(Arrays.mismatch(array1, array2));
    }
}
What is the result?

Options :
Answer: A

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