無料でゲット！2025年最新の有効な練習Oracle Java SE 1z1-819問題と解答でテストエンジン [Q68-Q89]

無料でゲット！最新の2025年最新の有効な練習Oracle Java SE 1z1-819問題と解答でテストエンジン

1z1-819問題集PDFで100%合格保証付き

Oracle 1Z0-819 認定試験は、80問の多肢選択問題と複数選択問題で構成され、180分以内に完了する必要があります。この試験は、Javaのデータ型、コレクション、関数型プログラミング、並行処理、およびI/Oなどの領域における知識とスキルを試験するように設計されています。

質問 # 68
Assume ds is a DataSource and the EMP table is defined appropriately.

What does executing this code fragment do?

A. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', NULL)
B. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', 'HR')
C. throws a SQLException
D. inserts one row (101, 'SMITH', 'HR')

正解：D

質問 # 69
Which method throws an exception for not-a-number and infinite input values?

正解：D

質問 # 70
Given:

What is the result?

A. [A, B, C]
[ B, C]
B. [A, B, C]
[A, B, C]
C. [A, B, C]
followed by an exception thrown on line 11.
D. On line 9, an exception is thrown at run time.

正解：B

質問 # 71
Given the code fragment:

You want to examine whether path is a directory.
Which code inserted on line 1 will accomplish this?

A. BasicFileAttributes attributes = Files isDirectory (path);
B. BasicFileAttributes attributes =Files.getAttribute (path, ''insdirectory'');
C. BasicFileAttributes attributes = Files, readAttributes (path, FileAttributes, class);
D. BasicFileAttributes attributes = Files.readAttributes(path, BasicFileAttributes.class

正解：C

質問 # 72
Given the Person class with age and name along with getter and setter methods, and this code fragment:

What will be the result?

A. Tom Aman Peter
B. Tom Peter Aman
C. Aman Peter Tom
D. Aman Tom Peter

正解：C

質問 # 73
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) . findAny () ) {
B. If (items.stream () .anymatch (i -> count < 0) < 0) ) {
C. If (items.stream () .filter (i -> count < 0) . findFirst () ) {
D. If (items.stream () .allmatch (i -> count < 0) < 0) ) {

正解：C

質問 # 74
Given:

Which is true?

A. System.out is the standard output stream. The stream is open only when System.out is called.
B. System.in is the standard input stream. The stream is already open.
C. System.out is an instance of java.io.OutputStream by default.
D. System.in cannot reassign the other stream.

正解：B

質問 # 75
Which two statements are true about Java modules? (Choose two.)

A. Any named module can directly access all classes in an automatic module.
B. Modular jars loaded from -classpath are automatic modules.
C. Classes found in -classpath are part of an unnamed module.
D. Modular jars loaded from --module-path are automatic modules.
E. If a package is defined in both the named module and the unnamed module, then the package in the unnamed module is ignored.

正解：C、D

質問 # 76
Given:

What is the result?

A. An exception is thrown at runtime.
B. 6=(x+y)=42
C. 42=(x+y)=42
D. 6=(x+y)=6
E. 42=(x+y)=6

正解：B

解説：

質問 # 77
Given:

Which two codes, independently, can be inserted in line to 1 compile?

A. Abacus aba = (int e, int f) -> { return e * f; };
B. Abacus aba = (int i, j) -> ( return i * j; };
C. Abacus aba = (int m, int n) -> { m * n };
D. Abacus aba = v, w -> x * y;
E. Abacus aba = (a, b) -> a * b;

正解：B、E

質問 # 78
Given:

What is the result?

A. 0
B. 1
C. 2
D. 3

正解：D

質問 # 79
Given:

What is the result?

A. The compilation fails due to an error in line 5.
B. The compilation fails due to an error in line 4.
C. The compilation fails due to an error in line 2.
D. The compilation fails due to an error in line 1.
E. 0
F. 1
G. The compilation fails due to an error in line 3.

正解：F

質問 # 80
Given:

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

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

正解：D、E

質問 # 81
Given:

Which would cause s to be AQCD?

A. s.replace(s.indexOf("B"), s.indexOf("B"), "Q");
B. s.replace(s.indexOf("A"), s.indexOf("B"), "Q");
C. s.replace(s.indexOf("A"), s.indexOf("C"), "Q");
D. s.replace(s.indexOf("B"), s.indexOf("C"), "Q");

正解：D

質問 # 82
Given:

What is the result?

A. java.lang.ArrayIndexOutOfBoundsException thrown
B. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
C. [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet
D. [0,0] = Red[1,0] = Black[2,0] = Blue

正解：C

解説：

質問 # 83
Given this enum declaration:

Examine this code:
System.out.println(Letter.values()[1]);
What code should be written at line 5 for this code to print 200?

A. String toString() { return "200"; }
B. public String toString() { return String.valueOf(ALPHA.v); }
C. public String toString() { return String.valueOf(v); }
D. public String toString() { return String.valueOf(Letter.values()[1]); }

正解：C

解説：

質問 # 84
Given:

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

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

正解：A、D

質問 # 85
Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

A. To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.
B. A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.
C. To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
D. An implementation of country.countryDetails can be added to the main module.
E. A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.

正解：A、B

質問 # 86
Given:

What is the result?

A. The program prints nothing.
B. Orange Juice
C. The compilation fails.
D. Orange Juice Apple Pie Lemmon Ice Raspberry Tart

正解：D

解説：

質問 # 87
Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

A. To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.
B. A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.
C. To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
D. An implementation of country.countryDetails can be added to the main module.
E. A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.

正解：A、B

質問 # 88
Given:

What must be added in line 1 to compile this class?