1z1-809 試験問題を無料オンラインアクセス

Given:
public class Test<T> {
private T t;
public T get () {
return t;
}
public void set (T t) {
this.t = t;
}
public static void main (String args [ ] ) {
Test<String> type = new Test<>();
Test type 1 = new Test ();//line n1
type.set("Java");
type1.set(100);//line n2
System.out.print(type.get() + " " + type1.get());
}
}
What is the result?

• A.Java 100
• B.java.lang.string@<hashcode>java.lang.Integer@<hashcode>
• C.A compilation error occurs. To rectify it, replace line n1 with:Test<Integer> type1 = new Test<>();
• D.A compilation error occurs. To rectify it, replace line n2 with:type1.set (Integer(100));

Given:

and this code fragment:

What is the result?

• A.Open-Close-Exception - 1Open-Close-
• B.Open-Close-Open-
• C.A compilation error occurs at line n1.
• D.Open-Close-Open-Close-

Given that data.txt and alldata.txt are accessible, and the code fragment:

What is required at line n1 to enable the code to overwrite alldata.txt with data.txt?

• A.bw.writeln();
• B.br.flush();
• C.br.close();
• D.bw.flush();

Given the code fragment:

Assume that:
The required database driver is configured in the classpath.
The appropriate database is accessible with the dbURL, userName, and passWord exists The Employee table has a column ID of type integer and the SQL query matches one record.
What is the result?

• A.Compilation fails at line 15.
• B.Compilation fails at line 14.
• C.The code prints the employee ID.
• D.The code prints Error.

Given:

Which two interfaces can you use to create lambda expressions? (Choose two.)

• A.S
• B.R
• C.P
• D.Q
• E.T
• F.U