1Z1-805無料問題集「Oracle Upgrade to Java SE 7 Programmer」

質問 1

In the Java SE7 API, which method is most commonly used by factories to instantiate objects?

（A）make ()

（B）new ()

（C）getInstance ()

（D）create ()

（E）createObject ()

（F）getObject ()

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 2

Consider the following five methods:

Which method should you use to connect to a java Db database with JDBC 4.0, but not with
previous versions of JDBC?

（A）getConnectionD

（B）getConnectionC

（C）getConnectionE

（D）getConnectionB

（E）getConnectionA

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 code fragment:
Path path1 = Paths.get("D:\\sales\\.\\quarterly\\..\\report");
path1 = path1.normalize();
Path path2 = path1.relativize(Paths.get("d:\\empdetails.dat"));
path2 = path2.resolve(path1);
System.out.println(path1);
System.out.println(path2);
}
What is the result?

（A）\sales\report\empdetails.dat

（B）\sales\report\empdetails.dat

（C）D: \sales\quarterly\ . . .\report

（D）D: \sales\report

（E）\sales\report

（F）D: \sales\report

（G）D: \sales\quarterly\ . . . \report

（H）\sales\report

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 4

What design pattern does the Drivermanager.getconnection () method characterize?

（A）composition

（B）Factory

（C）Singleton

（D）DAO

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 5

Given the code fragment:
public class TestString {
public static void main(String[] args) {
String str=null;
switch(str) {
case "":
System.out.println("blank"); break;
case "null":
System.out.println("NULL"); break;
default:
System.out.println("invalid"); break;
}
}
}
What is the result?

（A）An exception is thrown at runtime

（B）Compilation fails

（C）Blank

（D）NULL

（E）Invalid

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 6

Given:
public class DataCache {
private static final DataCache instance = new DataCache ();
public static DataCache getInstance () {
return instance;
}
}
Which design pattern best describes the class?

（A）Composition

（B）Singleton

（C）DAO

（D）Abstract Factory

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 7

Which two Capabilities does Java.util.concurcent.BlockingQueue provide to handle operation that cannot be handled immediately?

（A）Wait for space to become available in the queue before inserting an element.

（B）Wait for the queue to contain elements before retrieving an element.

（C）Automatically retry access to the queue with a given periodicity.

（D）Increase the queue's capacity based on the rate of blocked access attempts.

正解：A、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 8

Given:
ConcurrentMap<String, String> partList = new ConcurrentHashMap<> (); Which fragment puts a key/value pair in partList without the possibility of overwriting an existing key?

（A）partList.put (key, "Blue Shirt");

（B）partList.putAtomic (key, "Blue Shirt");

（C）if (!partlist.containsKey(key)) partList.put(key, "Blue Shirt");

（D）partList.putAbsent(key, "Blu Shirt")

（E）partList.putIfNotLocked (key, "Blue Shirt");

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 9

Given:
private static void copyContents() {
try (
InputStream fis = new FileInputStream("report1.txt");
OutputStream fos = new FileOutputStream("consolidate.txt");
) {
byte[] buf = new byte[8192];
int i;
while ((i = fis.read(buf)) != -1) {
fos.write(buf, 0, i);
}
fis.close();
fis = new FileInputStream("report2.txt");
while ((i = fis.read(buf)) != -1) {
fos.write(buf, 0, i);
}
}
What is the result?

（A）The contents of report1.txt are copied to consolidate.txt. The contents of report2.txt are appended to consolidate.txt, without a break in the flow.

（B）Compilation fails due to an error at line 28

（C）Compilation fails due to error at line 15 and 16

（D）The contents of report1.txt are copied to consolidate.txt. The contents of report2.txt are appended to consolidate.txt, after a new line

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)

1Z1-805 無料問題集「Oracle Upgrade to Java SE 7 Programmer」

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