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NEW QUESTION 113
Given:
var data = new ArrayList<>();
data.add("Peter");
data.add(30);
data.add("Market Road");
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?
- A. [Peter, 30, Market Road]
- B. An exception is thrown at run time.
- C. [Market Road, 1000]
- D. [Peter, 25, null, 1000]
Answer: B
Explanation:
NEW QUESTION 114
Your organization makes mlib.jar available to your cloud customers. While working on a new feature for mlib.jar, you see that the customer visible method public void enableService(String hostName, String portNumber) executes this code fragment
and you see this grant is in the security policy file:
What security vulnerability does this expose to your cloud customer's code?
- A. SQL injection attack against the specified host and port
- B. XML injection attack against any mlib server
- C. denial of service attack against any reachable machine
- D. privilege escalation attack against the OS running the customer code
- E. none because the customer code base must also be granted SocketPermission
Answer: A
NEW QUESTION 115
Given:
Which two are correct? (Choose two.)
- A. The output will be exactly 2 1 3 4 5.
- B. Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5, but the order is unpredictable.
- C. Replacing forEach() with forEachOrdered(), the program prints 2 1 3 4 5.
- D. Replacing forEach() with forEachOrdered(), the program prints 1 2 3 4 5.
- E. The program prints 1 4 2 3, but the order is unpredictable.
Answer: D,E
Explanation:
NEW QUESTION 116
Given:
Which three are true? (Choose three.)
- A. f1.foo(c) prints Ola Mundo!
- B. f2.foo(c) prints Bonjour le monde!
- C. f1.foo(c) prints Hello world!
- D. b1.foo(c) prints Hello world!
- E. b1.foo(c) prints Bonjour le monde!
- F. f2.foo(c) prints Ola Mundo!
- G. f2.foo(c) prints Hello world!
- H. f1.foo(c) prints Bonjour le monde!
- I. b1.foo(c) prints Ola Mundo!
Answer: B,C,I
NEW QUESTION 117
Examine this excerpt from the declaration of the java.se module:
What does the transitive modifier mean?
- A. Only a module that requires the java.se module is permitted to require the java.sql module.
- B. Any module that requires the java.sql module does not need to require the java.se module.
- C. Any module that attempts to require the java.se module actually requires the java.sql module instead.
- D. Any module that requires the java.se module does not need to require the java.sql module.
Answer: A
NEW QUESTION 118
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
NEW QUESTION 119
Given the code fragment:
You must make the countvariable thread safe.
Which two modifications meet your requirement? (Choose two.)
- A. replace line 3 with
synchronized(test.count) {
test.count++;
} - B. replace line 1 with private volatile int count = 0;
- C. replace line 1 with private AtomicInteger count = new AtomicInteger(0);and replace line 3 with test.count.incrementAndGet();
- D. replace line 2 with public static synchronized void main(String[] args) {
- E. replace line 3 with
synchronized(test) {
test.count++;
}
Answer: A,C
Explanation:
Explanation/Reference: https://stackoverflow.com/questions/15852123/java-thread-safe-counter/15852164
NEW QUESTION 120
Given the code fragment:
What is the result?
- A. 2 : 3
- B. 2 : -1
- C. 3 : 0
- D. -1 : 2
Answer: B
NEW QUESTION 121
Given:
You want to examine the items list it contains an item for which the variable count is below zero.
Which code fragment at line 1 accomplish this?
- A. If (items.stream () .filter (i -> count < 0) . findFirst () ) {
- B. If (items.stream () .allmatch (i -> count < 0) < 0) ) {
- C. If (items.stream () .filter (i -> count < 0) . findAny () ) {
- D. If (items.stream () .anymatch (i -> count < 0) < 0) ) {
Answer: A
NEW QUESTION 122
Given the code fragment:
What is the result?
- A. false true true
- B. false false true
- C. true false false
- D. false true false
Answer: D
Explanation:
NEW QUESTION 123
Given:
Which option should you choose to enable the code to print Something happened?
- A. Add extends GeneralException on line 1.
Add extends Exception on line 2. - B. Add extends Exception on line 1.
Add extends GeneralException on line 2. - C. Add extends Exception on line 1.
Add extends Exception on line 2. - D. Add extends SpecificException on line 1.
Add extends GeneralException on line 2.
Answer: B
Explanation:
NEW QUESTION 124
Which code fragment prints 100 random numbers?
- A. Option D
- B. Option B
- C. Option C
- D. Option A
Answer: A
NEW QUESTION 125
Given:
What is the output?
- A. Bonjour le monde!Bonjour le monde!
- B. Bonjour le monde!Hello world!
- C. Hello world!Hello world!
- D. Hello world!Bonjour le monde!
Answer: B
Explanation:
NEW QUESTION 126
Given:
Which two constructors will compile and set the class field strings? (Choose two.)
- A. Option E
- B. Option C
- C. Option B
- D. Option D
- E. Option A
Answer: A,B
NEW QUESTION 127
Given:
var data = new ArrayList<>();
data.add("Peter");
data.add(30);
data.add("Market Road");
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?
- A. [Peter, 30, Market Road]
- B. An exception is thrown at run time.
- C. [Market Road, 1000]
- D. [Peter, 25, null, 1000]
Answer: B
Explanation:
NEW QUESTION 128
Given:
What is the output?
- A. Message from Abstract Copier: Attempt00
- B. A compilation error is thrown.
- C. Message from Copier: Attempt00
- D. A runtime error is thrown.
Answer: B
NEW QUESTION 129
Given:
What is the result?
- A. An exception is thrown at runtime
- B. The program prints nothing.
- C. Take extra care
Take extra care - D. Take extra care
Answer: A
NEW QUESTION 130
......
Understanding functional and technical aspects of Java SE 11 Developer Exam Number: 1Z0-819
The following will be discussed in the ORACLE 1Z0-006 exam dumps pdf:
- Use generics, including wildcards
- Implement functional interfaces using lambda expressions, including interfaces from the java.util.function package
- Develop thread-safe code, using different locking mechanisms and java.util.concurrent API
- Use Java Streams to filter, transform and process data
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