[2025年03月29日] 合格させるOracle 1Z0-819試験情報と無料練習テスト [Q61-Q80]

[2025年03月29日] 合格させるOracle 1Z0-819試験情報と無料練習テスト

1Z0-819試験問題集PDF更新された問題集にはFast2test試験合格保証付き

質問 # 61
Given:

and the code fragment:

What is the result?
9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt

A. 9001: APPLICATION ERROR-9001-MyFile.txt
B. Compilations fails at Line 1.
C.
D. 9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt
9001: APPLICATION ERROR-9001-MyFile.txt

正解：B

質問 # 62
Given:

What is the result?

A. An exception is thrown at runtime.
B. null
C. Dr. Who
D. Dr. Null

正解：B

解説：

質問 # 63
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> tripler = x-> - { return (Integer) X * 3 ; }.
C. Replace line 12 with public static int printValue function<Integer, Integer>, f, T num {.
D. Replace line 12 with public static void printValue function<Integer> f, int num) {.
E. Replace line 9 with function<Integer>, Integer> = X -> { return (integer) x * 3; }.

正解：B、C

質問 # 64
Given the code fragment:

You want to display the value of currency as $100.00.
Which code inserted on line 1 will accomplish this?

A. NumberFormat formatter = NumberFormat.getInstance(locale).getCurrency();
B. NumberFormat formatter = NumberFormat.getInstance(locale);
C. NumberFormat formatter = NumberFormat.getCurrencyInstance(locale);
D. NumberFormat formatter = NumberFormat.getCurrency(locale);

正解：A

質問 # 65
Given:

Which two methods modify field values? (Choose two.)

A. setCCount
B. setACount
C. setGCount
D. setTCount
E. setAllCounts

正解：C、E

質問 # 66
Given the code fragment:

You want to validate a path name before the read file. Before validation, all path names should be canonicalized.
Which code inserted on line nl will accomplish this?

正解：C

質問 # 67
Given:

and:

Which code, when inserted on line 10, prints the number of unique localities from the roster list?

A. .filter(Employee::getLocality)
.distinct()
.count();
B. .map(Employee::getLocality)
.distinct()
.count();
C. .map(e -> e.getLocality())
.collect(Collectors.toSet())
.count();
D. map(e -> e.getLocality())
.count();

正解：A

質問 # 68
Given:

Which two method implementations are correct, when inserted independently in line 1? (Choose two.)

A. Option B
B. Option A
C. Option D
D. Option C
E. Option E

正解：B、E

質問 # 69
Given:

What is the result?

A. 0 4 9
B. 0
C. 1
D. nothing

正解：D

質問 # 70
Given:

Which three classes successfully override printOne()? (Choose three.)

A. Option D
B. Option B
C. Option A
D. Option C
E. Option F
F. Option E

正解：A、C、D

質問 # 71
Given the code fragment:

What is the result?

A. It prints 1 in the infinite loop.
B. 0
C. 01
D. The program prints nothing.
E. 1

正解：D

質問 # 72
Given:

executed using this command:
java Myclass My Car is red
What is the output of this class?

A. Car--red--My
B. My--is--java
C. My--Car--is
D. java--Myclass--My
E. Myclass--Car--red

正解：A

質問 # 73
Given:

What prevents this code from compiling?

A. Cylinderrequires an implementation of calculateSurfaceAreawith two parameters.
B. Cylinderis not properly calling the Rectangle and Ellipseinterfaces' calculateSurfaceArea methods.
C. The calculateSurfaceAreamethod within Cylinder must be declared default.
D. The calculateSurfaceAreamethod within Rectangle and Ellipserequires a publicaccess modifier.

正解：B

質問 # 74
Given:

Which is true?

A. The compilation fails due to an error in line 6.
B. The compilation succeeds.
C. The compilation fails due to an error in line 2.
D. The compilation fails due to an error in line 9.
E. The compilation fails due to an error in line 4.
F. The compilation fails due to an error in line 7.
G. The compilation fails due to an error in line 10.

正解：A

質問 # 75
Examine these module declarations:

Which two statements are correct? (Choose two.)

A. The ServiceProvider module should export the com.myimpl package.
B. The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
C. The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.
D. The Consumer module should require the ServiceProvider module.
E. The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the com.example.api API.

正解：B、D

質問 # 76
Given:

What is the result?

A. Good Morning, Harry
B. Good Night, Harry
C. Good Morning, Potter
D. Good Night, Potter

正解：D

解説：

質問 # 77
Given the code fragment:

What is the result?

A. 0
B. The compilation fails at line
C. The compilation fails at line 13.
D. 1
E. The compilation fails at line 16.

正解：D

質問 # 78
Given the code fragment:

What is the result?

A. 13 5 7 9
B. 2 4 6 B 10
C. 1 3 5 7 9 11
D. 2 4 6 8

正解：C

質問 # 79
Given:

Which two statements are true if the method is added to Bar? (Choose two.)

A. public Collection<String> foo(Collection<String> arg) { ... } overrides Foo.foo.
B. public <T> Collection<T> bar(Collection<T> arg) { ... } overloads Foo.foo.
C. public <T> Collection<T> foo(Collection<T> arg) { ... } overloads Foo.foo.
D. public <T> List<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
E. public <T> Collection<T> foo(Stream<T> arg) { ... } overloads Foo.foo.
F. public <T> Iterable<T> foo(Collection<T> arg) { ... } overrides Foo.foo.

正解：D、F

質問 # 80
......

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