Latest [Nov 20, 2025] Oracle 1Z0-819 Exam Practice Test To Gain Brilliante Result
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NEW QUESTION # 165
Which three initialization statements are correct? (Choose three.)
- A. byte b = 10;char c = b;
- B. boolean true = (4 == 4);
- C. String contact# = "(+2) (999) (232)";
- D. float x = 1.99;
- E. int[][] e = {{1,1},{2,2}};
- F. short sh = (short)'A';
- G. int x = 12_34;
Answer: E,F,G
NEW QUESTION # 166
Given:
Which one is correct?
- A. Four threads are created.
- B. The compilation fails.
- C. Three threads are created.
- D. An IllegalThreadStateException is thrown at run time.
Answer: D
Explanation:
NEW QUESTION # 167
Given:
What is the output?
- A. 1 2 [1, 2, 3, 4] 3 four
- B. 1 2 [1, 2, 3, 4] 3 4
- C. 1 2 [1, 2, 3, four] 3 4
- D. 1 2 [1, 2, 3, four] 3 four
Answer: B
NEW QUESTION # 168
Which two describe reasons to modularize the JDK? (Choose two.)
- A. improves security and maintainability
- B. easier to build a custom runtime linking application modules and JDK modules
- C. easier to understand the Java language
- D. improves application robustness
- E. easier to expose implementation details
Answer: A,D
NEW QUESTION # 169
How many Thing objects are eligible for garbage collection in line 1?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: E
NEW QUESTION # 170
Given:
What is the output?
- A. Message from Copier: Attempt00
- B. Message from Abstract Copier: Attempt00
- C. A runtime error is thrown.
- D. A compilation error is thrown.
Answer: D
NEW QUESTION # 171
Which two expressions create a valid Java Path instance? (Choose two.)
- A. Paths.getPath("too")
- B. Paths.get(URL.create("file:///domains/oracle/test.txt"))
- C. Paths.get("foo")
- D. Path.get(new URI("file:///domains/oracle/test.txt"))
- E. new Path("foo")
Answer: B,C
NEW QUESTION # 172
Given:
What is the result:
X is 2
- A. The compilation fails due to an error in line 2.
- B. The compilation fails due to an error in line 1.
- C. X is 10.
- D. Error parsing value 0
Answer: A
NEW QUESTION # 173
Given:
What is the output?
- A. appleorangebanana
:APPLE:ORANGE:BANANA - B. :APPLE:ORANGE:BANANA
- C. :APPLE:ORANGE:BANANA
appleorangebanana - D. apple:APPLE orange:ORANGE banana:BANANA
- E. APPLE:apple ORANGE:orange BANANA:banana
Answer: D
Explanation:
NEW QUESTION # 174
Given the code fragment:
What is the result?
- A. 0 4 9
- B. 0
- C. 0 8 10
- D. The code prints nothing.
- E. 0 8
Answer: E
Explanation:
NEW QUESTION # 175
Given:
Which two lines inserted in line 1 will allow this code to compile? (Choose two.)
- A. protected void walk(){}
- B. void walk(){}
- C. public abstract void walk();
- D. private void walk(){}
- E. abstract void walk();
Answer: A,C
NEW QUESTION # 176
Given:
and
What is the result?
- A. The compilation fails.
- B. 1
Null
null - C. A ClassCastException is thrown at run time.
- D. A NullPointerException is thrown at run time.
- E. 1
1
1
Answer: A
Explanation:
NEW QUESTION # 177
Given the code fragment:
What change on line 1 will make this code compile?
- A. Add catch (L |N e).
- B. Add catch (N | L | M e).
- C. Add catch (L |M N e).
- D. Add catch (M |L e).
- E. Add catch (L e).
Answer: E
NEW QUESTION # 178
Given:
What is the result?
- A. The compilation fails.
- B. SomeClass#methodA()SomeClass#methodA()
- C. SomeClass#methodA()AnotherClass#methodA()
- D. AnotherClass#methodA()AnotherClass#methodA()
- E. AnotherClass#methodA()SomeClass#methodA()
- F. A ClassCastException is thrown at runtime.
Answer: A
Explanation:
NEW QUESTION # 179
Examine these module declarations:
Which two statements are correct? (Choose two.)
- A. The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.
- B. The ServiceProvider module should export the com.myimpl package.
- C. The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the com.example.api API.
- D. The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
- E. The Consumer module should require the ServiceProvider module.
Answer: D,E
NEW QUESTION # 180
Given the code fragment:
What is the result?
- A. ad be cf
- B. The compilation fails.
- C. ab cd ef
- D. abc def
- E. An ArrayIndexOutOfBoundsException is thrown at runtime.
Answer: A
NEW QUESTION # 181
Which command line runs the main class com.acme.Main from the module com.example?
- A. java -classpath com.example.jar com.acme.Main
- B. java -classpath com.example.jar -m com.example/com.acme.Main
- C. java --module-path mods com.example/com.acme.Main
- D. java --module-path mods -m com.example/com.acme.Main
Answer: B
NEW QUESTION # 182
Given:
Which two methods modify field values? (Choose two.)
- A. setAllCounts
- B. setCCount
- C. setTCount
- D. setGCount
- E. setACount
Answer: A,D
NEW QUESTION # 183
Given:
public class X {
}
and
public final class Y extends X {
}
What is the result of compiling these two classes?
- A. The compilation fails because a final class cannot extend another class.
- B. The compilation succeeds.
- C. The compilation fails because either class X or class Y needs to implement the toString() method.
- D. The compilation fails because there is no zero args constructor defined in class X.
Answer: C
Explanation:
NEW QUESTION # 184
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. isValid must be public.
- B. left and right must be private.
- C. setLeft and setRight must be protected.
- D. left, right, setLeft, and setRight must be private.
Answer: B
NEW QUESTION # 185
Given:
What is the result?
- A. watermelonorangelemongrapeapricotapple
- B. appleapricotgrapelemonorangewatermelon
- C. nothing
- D. appleorangegrapelemonapricotwatermelon
Answer: A
Explanation:
NEW QUESTION # 186
Given the code fragment:
What is the result?
- A. 2 4 6 8
- B. 1 3 5 7 9
- C. 2 4 6 8 10
- D. 1 3 5 7 9 11
Answer: B
NEW QUESTION # 187
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