[2024年12月]更新の1z0-808問題集PDFで1z0-808リアル試験問題解答
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Oracle 1z1-808試験は、Java開発者向けの最も求められる認定試験の1つです。Java SE 8プログラミングに必要な基本的なスキルと知識をテストすることを目的としています。この試験は、Javaプログラミングに強固な基盤を持ち、公式の認定を取得してスキルを証明したいプロフェッショナルを対象としています。
Oracle 1z0-808試験は、Javaプログラミング言語とそのコア機能における専門知識を証明したい個人向けにOracleが提供する認定試験です。この試験は、Javaプログラミングに強固な基礎を持ち、自分のスキルと知識を検証したいプログラマーを対象としています。
質問 # 128
Given the code fragment:
Which option represents the state of the num array after successful completion of the outer loop?
- A. Option D
- B. Option A
- C. Option B
- D. Option C
正解：B
解説：
At first look we can exclude option D because the number of elements in the array is 3, the result of multiplying the two array dimensions 1 x 3.
We can run the code
public class Main {
public static void main(String[] args) {
int num[][] = new int[1][3];
for (int i=0; i<num.length; i++) {
for (int j=0; j<num[i].length; j++) {
num[i][j] = 10;
System.out.println("num[" + i + "][" + j + "]= " + num[i][j]);
}
}
}
}
the output is
num[0][0]= 10
num[0][1]= 10
num[0][2]= 10
質問 # 129
Given these requirements:
* Bus and Boat are Vehicle type classes.
* The start() and stop() methods perform common operations across the Vehicle class type.
* The ride() method performs a unique operations for each type of Vehicle.
Which set of actions meets the requirements with optimized code?
- A. 1. Create an abstract class Vehicle by defining start() and stop() methods, and declaring the ride() abstract method.
2. Create Bus and Boat classes by inheriting the Vehicle class and overriding the ride() method. - B. 1. Create an interface Vehicle by defining default stop(), start(), and ride() methods.
2. Create Bus and Boat classes by implementing the Vehicle interface and overriding the ride() method. - C. 1. Create an interface Vehicle by defining start() and stop() methods, and declaring the ride() abstract method.
2. Create Bus and Boat classes by implementing the Vehicle class. - D. 1. Create an abstract class Vehicle by declaring stop(), start(), and ride() abstract methods.
2. Create Bus and Boat classes by inheriting the Vehicle class and overriding all the methods.
正解：C
質問 # 130
Given:
And given the code fragment:
What is the result?
- A. Compilation fails
- B. C2C2
- C. C1C2
- D. C1C1
正解：B
質問 # 131
You are developing a banking module. You have developed a class named ccMask that has a maskcc method.
Given the code fragment:
You must ensure that the maskcc method returns a string that hides all digits of the credit card number except the four last digits (and the hyphens that separate each group of four digits).
Which two code fragments should you use at line n1, independently, to achieve this requirement?
- A. Option C
- B. Option D
- C. Option B
- D. Option A
正解：A
質問 # 132
Given the code fragment:
Which action enables it to print AB?
- A. Comment line 20.
- B. Comment line 16.
- C. Comment lines 18 to 21.
- D. Comment line 19.
正解：A
質問 # 133
Given:
What is the result?
- A. Initialized Started Initialized
- B. Initialized Started
- C. An exception is thrown at runtime.
- D. Compilation fails.
正解：A
質問 # 134
Given the code fragment:
What is the result?
- A. An UnsupportedOperationException is thrown at runtime.
- B. Hi removed
- C. Compilation fails.
- D. The program compiles, but it prints nothing.
正解：C
質問 # 135
Given:
package pkg1;
class Bb { }
public class Ee {
private Ee() { }
}
package pkg2;
final class Ww;
package pkg3;
public abstract class Dd { void m() { } }
And,
1. package pkg4;
2. import pkg1.*;
3. import pkg2.*;
4. import pkg3.*;
5. // insert a class definition here
Which two class definitions, when inserted independently at line 5, enable the code to compile?
- A. class Cc extends Ww { }
- B. class Cc extends Ee { }
- C. class Cc extends Bb { }
- D. class Cc extends Dd { }
正解：C、D
質問 # 136
Given the code fragments:
Which modification enables the code to compile?
A:
B:
C:
D:
- A. Option C
- B. Option D
- C. Option B
- D. Option A
正解：A
質問 # 137
Given:
What is the result?
- A. 3 4 5 6
- B. 3 6 4 6
- C. 3 4 3 6
- D. 5 4 5 6
正解：D
質問 # 138
Given the code fragment:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
正解：D
質問 # 139
Given the code fragment:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
正解：A
質問 # 140
Given:
What is the result?
A:
B:
C:
D:
- A. Option D
- B. Option B
- C. Option C
- D. Option A
正解：A
質問 # 141
Given the code fragment:
What is the result?
- A. 1:2:3:4:5:
- B. 1:2:3:
- C. Compilation fails.
- D. An ArrayOutOfBoundsException is thrown at runtime.
正解：A
質問 # 142
Given:
class Sports {
int num_players;
String name, ground_condition;
Sports(int np, String sname, String sground){
num_players = np;
name = sname;
ground_condition = sground;
}
}
class Cricket extends Sports {
int num_umpires;
int num_substitutes;
Which code fragment can be inserted at line //insert code here to enable the code to compile?
- A. Cricket() {
this.num_umpires =3;
this.num_substitutes=2;
super(11, "Cricket", "Condidtion OK");
} - B. Cricket() {
this(3,2);
super(11, "Cricket", "Condidtion OK");
}
Cricket(int nu, ns) {
this.num_umpires =nu;
this.num_substitutes=ns;
} - C. Cricket() {
super.ground_condition = "Condition OK";
super.name="Cricket";
super.num_players = 11;
num_umpires =3;
num_substitutes=2;
} - D. Cricket() {
super(11, "Cricket", "Condidtion OK");
num_umpires =3;
num_substitutes=2;
}
正解：D
解説：
Incorrect:
not C, not D: call to super must be the first statement in constructor.
質問 # 143
......
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