1Z0-815 Dumps 2023 | Ideal Exam Material

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Question 1:

Given:

What is the result?

A. nothing

B. It fails to compile.

C. 0

D. A java.lang.IllegalArgumentException is thrown.

E. 10

Correct Answer: B

Question 2:

Which two modules include APIs in the Java SE Specification? (Choose two.)

A. java.logging

B. java.desktop

C. javafx

D. jdk.httpserver

E. jdk.jartool

Correct Answer: AD

Reference: https://docs.oracle.com/javase/9/docs/api/overview-summary.html

Question 3:

Given: What is the output?

A. 300

B. Exception

C. 200

D. 100

Correct Answer: A

Question 4:

Which two statements are true about the modular JDK? (Choose two.)

A. The foundational APIs of the Java SE Platform are found in the java.base module.

B. An application must be structured as modules in order to run on the modular JDK.

C. It is possible but undesirable to configure modules\’ exports from the command line.

D. APIs are deprecated more aggressively because the JDK has been modularized.

Correct Answer: AB

Question 5:

Given the code fragment: What is the result?

A. -1 : 2

B. 2 : -1

C. 2 : 3

D. 3 : 0

Correct Answer: A

Question 6:

Given:

What is the result?

A. The compilation fails.

B. abdf

C. abd

D. adf

E. abcd

Correct Answer: A

Question 7:

Which set of commands is necessary to create and run a custom runtime image from Java source files?

A. java, jdeps

B. javac, jlink

C. jar, jlink

D. javac, jar

Correct Answer: C

Reference: https://blogs.oracle.com/jtc/automating-the-creation-of-jdk9-reduced-runtime-images-innetbeans

Question 8:

Given:

What is the result?

A. 4

B. 3

C. An exception is thrown at runtime.

D. 5

Correct Answer: D

Question 9:

Given:

It is required that if p instanceof Pair then p.isValid() returns true.

Which is the smallest set of visibility changes to insure this requirement is met?

A. setLeft and setRight must be protected.

B. left and right must be private.

C. isValid must be public.

D. left, right, setLeft, and setRight must be private.

Correct Answer: B

Question 10:

Given:

What is the result?

A. It throws a runtime exception.

B. Value of Euler = 2.71828

C. The code does not compile.

D. Value of Euler = “2.71828”

Correct Answer: C

Question 11:

Given:

executed using this command: java Myclass My Car is red What is the output of this class?

A. Car–red–My

B. My–Car–is

C. My–is–java

D. java–Myclass–My

E. Myclass–Car–red

Correct Answer: B

Question 12:

Given:

Which two allow a.Main to allocate a new Person? (Choose two.)

A. In Line 1, change the access modifier to private private Person() {

B. In Line 1, change the access modifier to public public Person() {

C. In Line 2, add extends Person to the Main class public class Main extends Person { and change Line 3 to create a new Main object Person person = new Main();

D. In Line 2, change the access modifier to protected protected class Main {

E. In Line 1, remove the access modifier Person() {

Correct Answer: CE

Question 13:

Given:

Which loop incurs a compile time error?

A. the loop starting line 11

B. the loop starting line 7

C. the loop starting line 14

D. the loop starting line 3

Correct Answer: A

Question 14:

Which two statements are true about Java modules? (Choose two.)

A. Modular jars loaded from –module-path are automatic modules.

B. Any named module can directly access all classes in an automatic module.

C. Classes found in –classpath are part of an unnamed module.

D. Modular jars loaded from –classpath are automatic modules.

E. If a package is defined in both the named module and the unnamed module, then the package in the unnamed module is ignored.

Correct Answer: AC

Reference: http://tutorials.jenkov.com/java/modules.html

Question 15:

Given:

Which two lines of code when inserted in line 1 correctly modifies instance variables? (Choose two.)

A. setCCount(c) = cCount;

B. tCount = tCount;

C. setGCount(g);

D. cCount = setCCount(c);

E. aCount = a;

Correct Answer: BE