Choose 1z0-809日本語 most accurate study material

Given that these files exist and are accessible:

and given the code fragment:

Which code fragment can be inserted at line n1to enable the code to print only
/company/emp?

• A. Stream<Path> stream = Files.walk (Paths.get ("/company"));
• B. Stream<Path> stream = Files.list (Paths.get ("/company"));
• C. Stream<Path> stream = Files.list (Paths.get ("/company/emp"));
• D. Stream<Path> stream = Files.find(
  Paths.get ("/company"), 1,
  (p,b) -> b.isDirectory (), FileVisitOption.FOLLOW_LINKS);

Given:
class RateOfInterest {
public static void main (String[] args) {
int rateOfInterest = 0;
String accountType = "LOAN";
switch (accountType) {
case "RD";
rateOfInterest = 5;
break;
case "FD";
rateOfInterest = 10;
break;
default:
assert false: "No interest for this account"; //line n1
}
System.out.println ("Rate of interest:" + rateOfInterest);
}
}
and the command:
java -ea RateOfInterest
What is the result?

• A. Rate of interest: 0
• B. An AssertionError is thrown.
• C. No interest for this account
• D. A compilation error occurs at line n1.

Given:
1. abstract class Shape {
2. Shape ( ) { System.out.println ("Shape"); }
3. protected void area ( ) { System.out.println ("Shape"); }
4. }
5.
6. class Square extends Shape {
7. int side;
8. Square int side {
9./* insert code here */
10. this.side = side;
11. }
12. public void area ( ) { System.out.println ("Square"); }
13. }
14. class Rectangle extends Square {
15. int len, br;
16. Rectangle (int x, int y) {
17. /* insert code here */
18. len = x, br = y;
19. }
20. void area ( ) { System.out.println ("Rectangle"); }
21. }
コードをコンパイルできるようにする2つの変更はどれですか？

• A. At line 20, use public void area ( ) {
• B. At line 9, insert super ( );
• C. At line 1, remove abstract
• D. At line 17, insert super (); super.side = x;
• E. At line 12, remove public
• F. At line 17, insert super (x);

java.util.stream.Streamについて正しい記述はどれですか？

• A. ストリームはソースデータを変更するためのものです。
• B. 並列ストリームは、同等の順次ストリームよりも常に高速です。
• C. ストリームの実行モードは、処理中に変更できます。
• D. ストリームは複数回使用できません。

Given:
final class Folder {//line n1
//line n2
public void open () {
System.out.print("Open");
}
}
public class Test {
public static void main (String [] args) throws Exception {
try (Folder f = new Folder()) {
f.open();
}
}
}
どの2つの変更により、コードでOpen Closeを印刷できますか？

• A. Replace line n1 with:
  class Folder implements AutoCloseable {
• B. Replace line n1 with:
  class Folder extends Exception {
• C. At line n2, insert:
  final void close () {
  System.out.print("Close");
  }
• D. At line n2, insert:
  public void close () throws IOException {
  System.out.print("Close");
  }
• E. Replace line n1 with:
  class Folder extends Closeable {