[2023年10月]更新の1z1-819試験資料Oracle学習ガイド [Q120-Q142]

[2023年10月]更新の1z1-819試験資料Oracle学習ガイド

有効な問題最新版を試そう1z1-819テスト解釈1z1-819有効な試験ガイド

質問 # 120
Which three initialization statements are correct? (Choose three.)

A. float x = 1f;
B. boolean false = (4 != 4);
C. int x = 12_34;
D. int[][][] e = {{1,1,1},{2,2,2}};
E. String contact# = "(+2) (999) (232)";
F. short sh = (short)'A';
G. byte b = 10;
char c = b;

正解：A、C、F

質問 # 121
Given an application with a main module that has this module-info.java file:

Which two are true? (Choose two.)

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

正解：D、E

質問 # 122
Given:

What is the result?

A. appleapricotgrapelemonorangewatermelon
B. watermelonorangelemongrapeapricotapple
C. nothing
D. appleorangegrapelemonapricotwatermelon

正解：B

解説：

質問 # 123
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(v); }
C. public String toString() { return String.valueOf(ALPHA.v); }
D. public String toString() { return String.valueOf(Letter.values()[1]); }

正解：B

解説：

質問 # 124
Given:

Which two interfaces can be used in lambda expressions? (Choose two.)

A. MyInterface1
B. MyInterface3
C. MyInterface5
D. MyInterface4
E. MyInterface2

正解：B、E

質問 # 125
Given:

What is the result?

A. 2,34,34,5
B. 2,54,54,5
C. 2,34,54,3
D. 2,34,54,5

正解：B

解説：

質問 # 126
Which is true?

A. The code compiles and runs successfully but with a wrong answer (i.e., a bug).
B. It prints 666.
C. The code does not compile successfully.
D. Code compiles but throws a runtime exception when run.

正解：D

質問 # 127
Given:

Which two statements are valid to be written in this interface? (Choose two.)

A. public void methodF(){System.out.println("F");}
B. public abstract void methodB();
C. public String methodD();
D. final void methodE();
E. final void methodG(){System.out.println("G");}
F. public int x;
G. private abstract void methodC();

正解：B、C

質問 # 128
Given the code fragment:

What change on line 1 will make this code compile?

A. Add catch (N | L | M e).
B. Add catch (L |N e).
C. Add catch (L |M N e).
D. Add catch (L e).
E. Add catch (M |L e).

正解：D

質問 # 129
Given:

Examine these requirements:
* Eliminate code duplication.
* Keep constant the number of methods other classes may implement from this interface.
Which method can be added to meet these requirements?

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

正解：A

質問 # 130
Given:

Which two lines inserted in line 1 will allow this code to compile? (Choose two.)

A. void walk(){}
B. public abstract void walk();
C. abstract void walk();
D. protected void walk(){}
E. private void walk(){}

正解：B、D

質問 # 131
Given:

Which two lines cause compilation errors? (Choose two.)

A. line 9
B. line 8
C. line 7
D. line 12
E. line 6

正解：C、E

質問 # 132
Given:

What is the result?

A. The compilation fails due to an error in line 1.
B. b1
C. b2
D. 0
E. 1
F. 2
G. b3

正解：F

解説：

質問 # 133
Given:

This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?

A. Consumer consumer = var arg -> {System.out.print(arg);};
B. Consumer consumer = System.out::print;
C. Consumer consumer = (String args) -> System.out.print(args);
D. Consumer consumer = msg -> { return System.out.print(msg); };

正解：B

解説：

質問 # 134
Given:

What is the result?

A. 6104 3
B. 6910 3
C. 10126 3
D. 0

正解：A

解説：

質問 # 135
Examine these module declarations:

Which two statements are correct? (Choose two.)

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

正解：D、E

質問 # 136
Given the code fragment:

What is the result?

正解：B

質問 # 137
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 5
C. after line 10
D. after line 6

正解：D

解説：

質問 # 138
Given the code fragment:

What is the result?

A. ab cd ef
B. An ArrayIndexOutOfBoundsException is thrown at runtime.
C. The compilation fails.
D. ad be cf
E. abc def

正解：D

質問 # 139
Given:

What is the result?

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

正解：D

解説：

質問 # 140
Which two are functional interfaces? (Choose two.)

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

正解：B、D

質問 # 141
Given the Customer table structure:
* ID Number Primary Key
* NAME Text Nullable
Given code fragment:

Which statement inserted on line 14 sets NAME column to a NULL value?