1z0-809 무료 덤프문제 온라인 액세스

Which class definition compiles?

• A.public class ProductCode {
  private String code;
  public ProductCode(String code) {
  if (code == null) {
  throw new IllegalArgumentException("Code cannot be null");
  }
  this.code = code;
  }
  }
• B.public class ProductCode {
  private String code;
  public ProductCode(String code) {
  this.code = code;
  }
  }
• C.public class ProductCode {
  private String code;
  private ProductCode(String code) {
  this.code = code;
  }
  }
  C.
  public class ProductCode {
  private String code;
  public ProductCode() {
  this.code = "default";
  }
  }

Given:
class UserException extends Exception { }
class AgeOutOfLimitException extends UserException { }
and the code fragment:
class App {
public void doRegister(String name, int age)
throws UserException, AgeOutOfLimitException {
if (name.length () <= 60) {
throw new UserException ();
} else if (age > 60) {
throw new AgeOutOfLimitException ();
} else {
System.out.println("User is registered.");
}
}
public static void main(String[ ] args) throws UserException {
App t = new App ();
t.doRegister("Mathew", 60);
}
}
What is the result?

• A.A compilation error occurs in the main method.
• B.An AgeOutOfLimitException is thrown.
• C.A UserException is thrown.
• D.User is registered.

Given:

Which option fails?

• A.Foo<Object, Object> percentage = new Foo<Object, Object>("Steve", 100);
• B.Foo<String, String> grade = new Foo <> ("John", "A");
• C.Foo<String, String> pair = Foo.<String>twice ("Hello World!");
• D.Foo<String, Integer> mark = new Foo<Object, Object> ("Steve", 100);

Given the definition of the Employee class:

and this code fragment:

What is the result?

• A.[hr:Bob, hr:Eva, sales:Ada, sales:Bob]
• B.[Ada:sales, Bob:sales, Bob:hr, Eva:hr]
• C.[hr:Eva, hr:Bob, sales:Bob, sales:Ada]
• D.[sales:Ada, hr:Bob, sales:Bob, hr:Eva]

Given the code fragment:
List<String> nL = Arrays.asList("Jim", "John", "Jeff");
Function<String, String> funVal = s -> "Hello : ".contact(s);
nL.Stream()
.map(funVal)
.peek(System.out::print);
What is the result?

• A.A compilation error occurs.
• B.Jim John Jeff
• C.Hello : Jim Hello : John Hello : Jeff
• D.The program prints nothing.