Quality 1z1-819 PDF Dumps - 1z1-819 Exam Questions
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NEW QUESTION # 42
Given:
Which two statements are valid to be written in this interface? (Choose two.)
- A. public int x;
- B. final void methodG(){System.out.println("G");}
- C. public String methodD();
- D. public abstract void methodB();
- E. public void methodF(){System.out.println("F");}
- F. private abstract void methodC();
- G. final void methodE();
Answer: C,D
NEW QUESTION # 43
Given:
Which statement is equivalent to line 1?
- A. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).reduce(starts, bo);
- B. double totalSalary = list.stream().mapToDouble(e -> e.getSalary() * ratio).sum;
- C. double totalSalary = list.stream().map(e -> e.getSalary() * ratio).reduce (bo).ifPresent (p -> p.doubleValue());
- D. double totalSalary = list.stream().map(Employee::getSalary * ratio).reduce (bo).orElse(0.0);
Answer: D
Explanation:
NEW QUESTION # 44
Given:
After which line can we insert assert i < 0 || values[i] <= values[i + 1]; to verify that the values array is partially sorted?
- A. after line 8
- B. after line 10
- C. after line 5
- D. after line 6
Answer: D
Explanation:
NEW QUESTION # 45
Given:
/code/a/Test.java
containing:
and
/code/b/Best.java
containing:
package b;
public class Best { }
Which is the valid way to generate bytecode for all classes?
- A. java /code/a/Test.java /code/b/Best.java
- B. java -cp /code a.Test
- C. javac -d /code /code/a/Test
- D. java /code/a/Test.java
- E. javac -d /code /code/a/Test.java
- F. javac -d /code /code/a/Test.java /code/b/Best.java
Answer: F
NEW QUESTION # 46
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, right, setLeft, and setRight must be private.
- C. left and right must be private.
- D. isValid must be public.
Answer: C
NEW QUESTION # 47
Given the code fragment:
What is the result?
- A. EUR -> 0.84
GBP -> 0.75
USD -> 1.00
CNY -> 6.42 - B. CNY -> 6.42
EUR -> 0.84
GBP -> 0.75
USD -> 1.00 - C. USD -> 1.00
GBP -> 0.75
EUR -> 0.84
CNY -> 6.42 - D. The compilation fails.
Answer: D
Explanation:
Explanation
Text Description automatically generated
NEW QUESTION # 48
Given:
What is the result?
- A. The compilation fails.
- B. Keys: 4 Values: 4 Map: 4
- C. Keys: 4 Values: 4 Map: 0
- D. Keys: 0 Values: 0 Map:
- E. Keys: 0 Values: 0 Map: 0
Answer: B
NEW QUESTION # 49
Given this enum declaration:
Examine this code:
System.out.println(Alphabet.getFirstLetter());
What code should be written at line 3 to make this code print A?
- A. static String getFirstLetter() { return Alphabet.values()[1].toString(); }
- B. String getFirstLetter() { return A.toString(); }
- C. static String getFirstLetter() { return A.toString(); }
- D. final String getFirstLetter() { return A.toString(); }
Answer: C
NEW QUESTION # 50
Given:
jdeps -jdkinternals C:\workspace4\SimpleSecurity\jar\classes.jar
Which describes the expected output?
- A. jdeps lists the module dependencies and the package names of all referenced JDK internal APIs. If any are found, the suggested replacements are output in the console.
- B. The -jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.
- C. The -jdkinternals option analyzes all classes in the .jar and prints all class-level dependencies.
- D. jdeps outputs an error message that the -jdkinternals option requires either the -summary or the - verbose options to output to the console.
Answer: B
Explanation:
-jdkinternals option analyzes all classes in the .jar for class-level dependencies on JDK internal APIs. If any are found, the results with suggested replacements are output in the console.
NEW QUESTION # 51
Given:
What is the type of x?
- A. String
- B. char
- C. List<Character>
- D. List<String>
Answer: A
NEW QUESTION # 52
Given TripleThis.java:
Compiling TripleThis.java gives this compiler warning:
Note: TripleThis.java uses unchecked or unsafe operations.
Which two replacements done together remove this compiler warning?
- A. Replace line 12 with public static <T> void printValue (Function<T, T> f, T num ) {,
- B. Replace line 9 with function<Integer>, Integer> = X -> { return (integer) x * 3; }.
- C. Replace line 9 with function<Integer> tripler = x-> - { return (Integer) X * 3 ; }.
- D. Replace line 12 with public static void printValue function<Integer> f, int num) {.
- E. Replace line 12 with public static int printValue function<Integer, Integer>, f, T num {.
Answer: C,E
NEW QUESTION # 53
Given:
executed using command:
java Hello "Hello World" Hello World
What is the output?
- A. Hello WorldHello World
- B. An exception is thrown at runtime.
- C. Hello WorldHelloWorld
- D. HelloHello WorldHelloWorld
- E. Hello World Hello World
Answer: E
NEW QUESTION # 54
Given:
Which is true?
- A. The compilation fails due to an error in line 10.
- B. The compilation succeeds.
- C. The compilation fails due to an error in line 4.
- D. The compilation fails due to an error in line 7.
- E. The compilation fails due to an error in line 6.
- F. The compilation fails due to an error in line 9.
- G. The compilation fails due to an error in line 2.
Answer: E
NEW QUESTION # 55
Which describes an aspect of Java that contributes to high performance?
- A. Java prioritizes garbage collection.
- B. Java monitors and optimizes code that is frequently executed.
- C. Java has a library of built-in functions that can be used to enable pipeline burst execution.
- D. Java automatically parallelizes code execution.
Answer: B
NEW QUESTION # 56
Which interface in the java.util.function package will return a void return type?
- A. Predicate
- B. Function
- C. Consumer
- D. Supplier
Answer: C
NEW QUESTION # 57
Given:
What is the output?
- A. 1 2 [1, 2, 3, 4] 3 four
- B. 1 2 [1, 2, 3, four] 3 4
- C. 1 2 [1, 2, 3, 4] 3 4
- D. 1 2 [1, 2, 3, four] 3 four
Answer: C
NEW QUESTION # 58
Given:
What is the result?
- A. 10126 3
- B. 6910 3
- C. 6104 3
- D. 0
Answer: C
Explanation:
NEW QUESTION # 59
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