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

質問 1

Given:
public class Equal {
public static void main(String[] args) {
String str1 = "Java";
String[] str2 = {"J","a","v","a"};
String str3 = "";
for (String str : str2) {
str3 = str3+str;
}
boolean b1 = (str1 == str3);
boolean b2 = (str1.equals(str3));
System.out.print(b1+", "+b2);
}
What is the result?

（A）false, false

（B）false, true

（C）true, false

（D）true, true

正解：B 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 2

Consider following method

Which statement is true?

（A）This method is invalid.

（B）None of above.

（C）This method can be used only in an interface.

（D）This method can return anything.

（E）This method can be used only in an interface or an abstract class.

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 3

Which three statements are benefits of encapsulation?

（A）permits classes to be combined into the same package

（B）allows a class implementation to change without changing t he clients

（C）prevents code from causing exceptions

（D）enables multiple instances of the same class to be created safely

（E）protects confidential data from leaking out of the objects

（F）enables the class implementation to protect its invariants

正解：B、E、F 解答を投票する

質問 4

Given:
public class MainMethod {
void main() {
System.out.println("one");
}
static void main(String args) {
System.out.println("two");
}
public static void main(String[] args) {
System.out.println("three");
}
void mina(Object[] args) {
System.out.println("four");
}
}
What is printed out when the program is excuted?

（A）four

（B）three

（C）two

（D）one

正解：B 解答を投票する

質問 5

Given:

And given the code fragment:

What is the result?

（A）Compilation fails only at line n1

（B）Null 0 Auto
4W 150 Manual

（C）Compilation fails only at line n2

（D）4W 100 Auto
4W 150 Manual

（E）Compilation fails at both line n1 and line n2

正解：E 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 6

Given:

What is the result?

（A）3 4 3 6

（B）3 4 5 6

（C）5 4 5 6

（D）3 6 5 6

正解：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 7

View the exhibit.

Given the code fragment:

Which change enables the code to print the following?
James age: 20
Williams age: 32

（A）Enclosing line 6 and line 7 within a try block and adding:
catch (missingInfoException e2) { //code goes here} catch (AgeOutofRangeException e3) {//code goes here}

（B）Replacing line 5 with public static void main (String [] args) throws MissingInfoException, AgeOutofRangeException {

（C）Replacing line 5 with public static void main (String [] args) throws.Exception {

（D）Enclosing line 6 and line 7 within a try block and adding:
catch(Exception e1) { //code goes here}
catch (missingInfoException e2) { //code goes here} catch (AgeOutofRangeException e3) {//code goes here}

正解：C 解答を投票する

質問 8

Which statement is true about the default constructor of a top-level class?

（A）The default constructor of a subclass always invokes the no-argument constructor of its superclass.

（B）It can take arguments.

（C）It has private access modifier in its declaration.

（D）It can be overloaded.

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 9

Given the code fragment:

Which modification enables the code fragment to print TrueDone?

（A）At line 9, remove the break statement.

（B）Remove the default section.

（C）Replace line 5 with boolean opt = l;
Replace line 7 with case 1=

（D）Replace line 5 With String result = "true";
Replace line 7 with case "true":

正解：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 10

Given:
1. interface Pet { }
2. class Dog implements Pet { }
3. class Beagle extends Dog { }
Which three are valid?

（A）Dog f = new Pet();

（B）Pet e = new Beagle();

（C）Pet b = new Pet();

（D）Dog d = new Beagle();

（E）Beagle c = new Dog();

（F）Pet a = new Dog();

正解：B、D、F 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 11

Which two statements are true?

（A）Error is a RuntimeException.

（B）Error is an Exception.

（C）Error is a Throwable.

（D）Error class is extendable.

（E）Error class is unextendable.

正解：C、D 解答を投票する

質問 12

A method is declared to take three arguments.
A program calls this method and passes only two arguments.
What is the results?

（A）The third argument is given the value null.

（B）An exception occurs when the method attempts to access the third argument.

（C）The third argument is given the appropriate falsy value for its declared type.

（D）Compilation fails.

（E）The third argument is given the value void.

（F）The third argument is given the value zero.

正解：D 解答を投票する

質問 13

Given the code fragment:
StringBuilder sb = new StringBuilder();
sb.append("World");
Which fragment prints Hello World?
sb.insert(0, "Hello ");

（A）System.out.println(sb);

（B）System.out.println(sb);
sb.add(0, "Hello ");

（C）System.out.println(sb);
sb.set(0, "Hello ");

（D）System.out.println(sb);
sb.append(0, "Hello ");

正解：D 解答を投票する

質問 14

Given the code fragment:

What is the result?

（A）1:2:3:

（B）1:2:3:4:5:

（C）Compilation fails.

（D）An ArrayoutofBoundsException is thrown at runtime.

正解：B 解答を投票する

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

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