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Question 37 🔥

Given the code fragment:You must make the count variable thread safe.Which two modifications meet your requirement? (Choose two.)

Which database solution meets these requirements?

A. replace line 2 with public static synchronized void main(String[] args) {

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B. replace line 1 with private volatile int count = 0;

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C. replace line 3 withsynchronized(test) {test.count++;}

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D. replace line 1 with private AtomicInteger count = new AtomicInteger(0); and replace line 3 with test.count.incrementAndGet();

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E. replace line 3 withsynchronized(test.count) {test.count++;}

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Discussion of the question

Question 38 🔥

Given the code fragment:Which action enables Computator class to compile?

Which database solution meets these requirements?

A. change Line 1 to add throws NumberFormatException

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B. change Line 3 to Double sum = 0.0;

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C. change Line 5 to List<Double> numbers = List.of(5, 4, 6, 3, 7, 2, 8, 1, 9);

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D. change Line 2 to public Double sum ( C collection) {

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E. change Line 4 to for (Double n : collection) {

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Discussion of the question

Question 39 🔥

Given the code fragment:What is the result?

Which database solution meets these requirements?

A. The compilation fails due to an error in line 2.

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B. 201

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C. de

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D. 203

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E. The compilation fails due to an error in line 3.

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F. The compilation fails due to an error in line 1.

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Discussion of the question

Question 40 🔥

Given the code fragment:public void foo(Function<Integer, String> fun) {...}Which two compile? (Choose two.)

Which database solution meets these requirements?

A. foo( n -> Integer.toHexString(n) )

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B. foo( toHexString )

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C. foo( n -> n + 1 )

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D. foo( int n -> Integer.toHexString(n) )

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E. foo( n -> Integer::toHexString )

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F. foo( Integer::toHexString )

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G. foo( n::toHexString )

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H. foo( (int n) -> Integer.toHexString(n) )

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Discussion of the question

Question 41 🔥

Which declaration of an annotation type is legal?

Which database solution meets these requirements?

A. @interface Author {String name() default “”;String date();}

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B. @interface Author extends Serializable {String name() default “”;String date();}

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C. @interface Author {String name() default null;String date();}

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D. @interface Author {String name();String date;}

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E. @interface Author {String name();String date default “”;}

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Discussion of the question

Question 42 🔥

Given:What is the result?

Which database solution meets these requirements?

Discussion of the question

Ready to Pass Your Certification Test

oracle 1Z0_819

Exam contains 213 questions

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