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Download Java SE 11 Developer Exam Dumps
NEW QUESTION 54
Which code is correct?
- A. Runnable r = {System.out.println("Message")};
- B. Runnable r = "Message" > System.out.println();
- C. Runnable r = () -> {System.out.println("Message");};
- D. Runnable r = > System.out.println("Message");
- E. Runnable r = () > System.out::print;
Answer: C
NEW QUESTION 55
Given:
Which three actions implement Java SE security guidelines? (Choose three.)
- A. Change line 6 to public synchronized String[] getNames() {.
- B. Change line 2 to private final String[] names;.
- C. Change the getNames() method name to get$Names().
- D. Change line 3 to private Secret(String[] names) {.
- E. Change line 7 to return names.clone();.
- F. Change line 4 to this.names = names.clone();.
- G. Change line 2 to protected volatile String[] names;.
Answer: B,D,G
NEW QUESTION 56
Given:
What is the output?
- A. 0
- B. 1
- C. 2
- D. Exception
Answer: C
Explanation:
NEW QUESTION 57
Given the code fragment:
You must make the countvariable thread safe.
Which two modifications meet your requirement? (Choose two.)
- A. replace line 1 with private volatile int count = 0;
- B. replace line 3 with
synchronized(test) {
test.count++;
} - C. replace line 2 with public static synchronized void main(String[] args) {
- D. replace line 3 with
synchronized(test.count) {
test.count++;
} - E. replace line 1 with private AtomicInteger count = new AtomicInteger(0);and replace line 3 with test.count.incrementAndGet();
Answer: D,E
Explanation:
Explanation/Reference: https://stackoverflow.com/questions/15852123/java-thread-safe-counter/15852164
NEW QUESTION 58
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