oracle 1z0-811 practice test

Question 1

Which statement is true about primitive variables?

• A. They can be compared with the == operator.
• B. They can be compared with the equals method only.
• C. They cannot be compared.
• D. They can be compared with the compareTo method only.

Question 2

Given the code fragment:

What is the result?

• A. 2
• B. 4
• C. The program executes an infinite number of times.
• D. 3

Question 3

Identify two Java reserved words.

• A. array
• B. true
• C. this
• D. exception
• E. string

Question 4

Which statement is true about a Java method?

• A. It must be declared with an access modifier.
• B. It cannot be defined within another method.
• C. It must accept a parameter and return a value.
• D. It cannot be defined as static final.

Question 5

Given:

And the code fragment:

Which code fragment can be inserted at line n1 to enable the code to print All the best?

• A. void writeMsg();
• B. Messenger.writeMsg();
• C. writeMsg();
• D. m.writeMsg();

Question 6

Given the code fragment:

Which two code fragments are valid at line 2?
A.
for (int count = 0; count < 5; count++) {
System.out.print(count);
}
B.
package p1;
C.
import java.util.*;
public void display() {
List<Integer> nums = new ArrayList<> ();
}
D.
{
private int num;
}
E.
private String name = “John”;
public void display() {
System.out.print(name);
}

Question 7

You have been asked to develop a Java program that prints the elements of an array in reverse order.
Which looping statement cannot be used to meet the requirement?

• A. enhanced for
• B. standard for
• C. while
• D. do-while

Question 8

Given the code fragment:

Which statement is true?
A.
The code results in a compilation error. To make it compile, insert at line n1:
import java.lang.Math;
import java.lang.Random;
B.
The code compiles successfully
C.
The code results in a compilation error. To make it compile, insert at line n1:
import java.lang;
import java.util;
D.
The code results in a compilation error. To make it compile, insert at line n1:
import java.util.*;

Question 9

Given the code fragment:

What is the result?

• A. pen pencil erasers paper
• B. paper pen pencil erasers
• C. A compilation error occurs.
• D. A runtime exception is thrown.

Question 10

Given the code fragment:

Which code fragment, when inserted at line n1, enables the code to print Java Programming:1?

• A. System.out.println(name + “:” + count);
• B. System.out.println(c.name + “:” + count);
• C. System.out.println(c.name + “:” + Course.count);
• D. System.out.println(Course.name + “:” + c.count);

Question 11

Given:

What is the result?

• A. [null:-]
• B. [ : ]
• C. [null:null]
• D. [:null]

Question 12

Which two Java reserved words are used to implement encapsulation?

• A. final
• B. static
• C. public
• D. extends
• E. private

Question 13

Given the code fragment:

Which code fragment can be inserted at line n1 to enable the code to print 0.0?
A.
Ball b = null;
b.weight = 0.0;
B.
Ball.weight = 0.0;
C.
Ball b = new Ball(0.0);
D.
Ball b = new Ball();

Question 14

Which two statements are true about the Java Runtime Environment (JRE)?

• A. It is responsible for garbage collection.
• B. It interprets bytecode stored in a .class file.
• C. It contains the JDK and Java APIs.
• D. It is platform independent.
• E. You must install the JRE to compile a .java file.

Question 15

Identify two features of Java.

• A. architecture dependent
• B. platform independent
• C. single threaded
• D. robust