1z0-808無料問題集「Oracle Java SE 8 Programmer I」

質問 1

Given:

What is the result?

（A）true:false

（B）false:false

（C）true:true

（D）false:true

正解：D 解答を投票する

質問 2

Given the code fragment:

What is the result?

（A）7 : 2 : 3

（B）2 : 7 : 0

（C）2 : 7 : 3

（D）7 : 7 : 9

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 3

Given the definitions of the Birdclass and the Peacock class:

and the code fragment:

Which code snippet can be inserted to print Fly.Dance. ?

（A）Bird b = new Peacock ();
Peacock p = (Peacock) b;

（B）Bird p = new Peacock();

（C）Peacock b = new Peacock ();
Bird p = (Bird) b;

（D）Bird b = new Bird();
Peacock p = (Peacock) b;

正解：D 解答を投票する

質問 4

Given:

What is the result?

（A）myStr: 7007, myNum: 7007

（B）myStr: 9009, myNum: 9009

（C）Compilation fails

（D）myStr: 7007, myNum: 9009

正解：D 解答を投票する

質問 5

Given the code fragments:

Which modification enables the code to compile?

（A）Replace line n1 with:import p1. A;Replace line n2 with:import p1.*;

（B）Replace line n1 with:import p1;Replace line n2 with:import p1;import p1. p2;

（C）Replace line n1 with:import p1. A;Replace line n2 with:import p1. A;import p1. p2.B ;

（D）Replace line n1 with:import p1.*;Replace line n2 with:import p1. p2.*;

正解：C 解答を投票する

質問 6

Given the code fragment:

Which code fragment, when inserted at line 3, enables the code to print 10:20?

（A）int array = new int[2];

（B）int[] array;
array = int[2];

（C）int[] array = new int[2];

（D）int array [2] ;

正解：C 解答を投票する

質問 7

Given the code fragments:

What is the result?

（A）Compilation fails at both line n1 and line n2.

（B）Compilation fails only at line n2.

（C）Compilation fails only at line n1.

（D）Tool::exportTool:export

（E）RTool::exportTool::export

正解：A 解答を投票する

質問 8

Which of the following data types will allow the following code snippet to compile?

（A）float

（B）long

（C）int

（D）double

（E）byte

正解：A、D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 9

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 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.

（B）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.

（C）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.

（D）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.

正解：B 解答を投票する

質問 10

Given the following class:

Which two changes would encapsulate this class and ensure that the area field is always equal to length * height whenever the Rectangle class is used?

（A）Call the setArea method at the end of the setLength method.

（B）Change the area field to public.

（C）Call the setArea method at the end of the setHeight method.

（D）Call the setArea method at the beginning of the setHeight method.

（E）Call the setArea method at the beginning of the setLength method.

（F）Change the setArea method to private.

正解：C、F 解答を投票する

質問 11

Which statement is true about the switch statement?

（A）Its expression must evaluate to a single value.

（B）The break statement, at the end of each case block, is mandatory.

（C）Its case label literals can be changed at runtime.

（D）It must contain the default section.

正解：A 解答を投票する

質問 12

Given:

What is the result?

（A）A ClassCastException is thrown only at line n2.

（B）CC

（C）AC

（D）A ClassCastException is thrown only at line n1.

（E）AB

正解：A 解答を投票する

質問 13

Given the classes:
* AssertionError
* ArithmeticException
* ArrayIndexOutofBoundsException
* FileNotFoundException
* IllegalArgumentException
* IOError
* IOException
* NumberFormatException
* SQLException
Which option lists only those classes that belong to the unchecked exception category?

（A）FileNotFoundException, IOException, SQLException

（B）ArrayIndexOutOfBoundException, IllegalArgumentException, FileNotFoundException

（C）AssertionError, ArrayIndexOutOfBoundsException, ArithmeticException

（D）ArithmeticException, FileNotFoundException, NumberFormatException

（E）AssertionError, IOError, IOException

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 14

Given the code fragment:

What is the result?

（A）The program compiles, but it prints nothing.

（B）An UnsupportedOperationException is thrown at runtime.

（C）HiHowAreYou removed

（D）Compilation fails.

正解：C 解答を投票する

質問 15

Given the code fragment from three files:

Which code fragment, when inserted at line 2, enables the code to compile?

（A）Option E

（B）Option D

（C）Option B

（D）Option C

（E）Option A

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 16

Given the code fragment:

Which code fragment, when inserted at // insert code here, enables the code to compile and and print a b c?

（A）Static List update (String [] strs)

（B）Static void update (String[] strs)

（C）List update (String[] strs)

（D）Static ArrayListupdate(String [] strs)

（E）ArrayList static update(String [] strs)

正解：A 解答を投票する

質問 17

Given:

What is the result?

（A）A compile time error occurs

（B）20

（C）10

（D）10

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 18

Given:

What is the result?

（A）Welcome Visit Count:0
Welcome Visit Count: 0

（B）Welcome Visit Count:0
Welcome Visit Count: 1

（C）Compilation fails at line n2.

（D）Compilation fails at line n1.

正解：D 解答を投票する

質問 19

View the Exhibit.
public class Hat {
public int ID =0;
public String name = "hat";
public String size = "One Size Fit All";
public String color="";
public String getName() { return name; }
public void setName(String name) {
this.name = name;
}
}
Given:
public class TestHat {
public static void main(String[] args) {
Hat blackCowboyHat = new Hat();
}
}
Which statement sets the name of the Hat instance?

（A）blackCowboyHat.setName("Cowboy Hat");

（B）blackCowboyHat.setName = "Cowboy Hat";

（C）Hat.setName("Cowboy Hat");

（D）setName("Cowboy Hat");

正解：A 解答を投票する

質問 20

Given:

How many objects have been created when the line / / do complex stuff is reached?

（A）Six

（B）Three

（C）Four

（D）Two

正解：D 解答を投票する

1z0-808 無料問題集「Oracle Java SE 8 Programmer I」

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