Oracle 1z0-809日本語 問題集

質問 1：
コードの断片を考えると：

行n1に個別に挿入した場合、どの2つのコードフラグメントが出力PEEKになりますか。
Unix？
A. .findAny（）;
B. .allMatch（）;
C. .anyMatch（）;
D. .findFirst（）;
E. .noneMatch（）;
正解：A,D

質問 2：
Given:

プログラムはどのスレッドの問題に苦しんでいますか？
A. race condition
B. starvation
C. deadlock
D. livelock
正解：C

質問 3：
コードの断片を考えると：

Course enumの有効な定義はどれですか？


A. Option A
B. Option C
C. Option D
D. Option B
正解：C

質問 4：
コードの断片を考えると：
Map<Integer, String> books = new TreeMap<>();
books.put (1007, "A");
books.put (1002, "C");
books.put (1003, "B");
books.put (1003, "B");
System.out.println (books);
結果は何ですか？
A. {1007=A, 1003=B, 1003=B, 1002=C}
B. {1007=A, 1003=B, 1002=C}
C. {1002=C, 1003=B, 1007=A}
D. {1007=A, 1002=C, 1003=B, 1003=B}
正解：C

質問 5：
コードの断片を考えると：
List<String> empDetails = Arrays.asList("100, Robin, HR",
"200, Mary, AdminServices",
"101, Peter, HR");
empDetails.stream()
.filter(s-> s.contains("1"))
.sorted()
.forEach(System.out::println); //line n1
What is the result?
A. 100, Robin, HR
200, Mary, AdminServices
101, Peter, HR
B. 100, Robin, HR
101, Peter, HR
200, Mary, AdminServices
C. A compilation error occurs at line n1.
D. 100, Robin, HR
101, Peter, HR
正解：D

質問 6：
Employeeテーブルのレコードを考えます：

and given the code fragment:
try {
Connection conn = DriverManager.getConnection (URL, userName,
passWord);
Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_UPDATABLE);
st.execute("SELECT*FROM Employee");
ResultSet rs = st.getResultSet();
while (rs.next()) {
if (rs.getInt(1) ==112) {
rs.updateString(2, "Jack");
}
}
rs.absolute(2);
System.out.println(rs.getInt(1) + " " + rs.getString(2));
} catch (SQLException ex) {
System.out.println("Exception is raised");
}
Assume that:
- The required database driver is configured in the classpath.
- The appropriate database accessible with the URL, userName, and
passWord exists.
What is the result?
A. The Employee table is updated with the row:
112 Jack
and the program prints:
112 Jack
B. The program prints Exception is raised.
C. The Employee table is updated with the row:
112 Jack
and the program prints:
112 Jerry
D. The Employee table is not updated and the program prints:
112 Jerry
正解：D

質問 7：
Given:
class Sum extends RecursiveAction { //line n1
static final int THRESHOLD_SIZE = 3;
int stIndex, lstIndex;
int [ ] data;
public Sum (int [ ]data, int start, int end) {
this.data = data;
this stIndex = start;
this. lstIndex = end;
}
protected void compute ( ) {
int sum = 0;
if (lstIndex ?stIndex<;= THRESHOLD_SIZE) {
for (int i = stIndex; i < lstIndex; i++) {
sum += data [i];
}
System.out.println(sum);
} else {
new Sum (data, stIndex + THRESHOLD_SIZE, lstIndex).fork( );
new Sum (data, stIndex,
Math.min (lstIndex, stIndex + THRESHOLD_SIZE)
).compute ();
}
}
}
and the code fragment:
ForkJoinPool fjPool = new ForkJoinPool ( );
int data [ ] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
fjPool.invoke (new Sum (data, 0, data.length));
and given that the sum of all integers from 1 to 10 is 55.
Which statement is true?
A. The program prints several values whose sum exceeds 55.
B. The program prints 55.
C. A compilation error occurs at line n1.
D. The program prints several values that total 55.
正解：C

質問 8：
Given the definition of the Employee class:

and this code fragment:

結果は何ですか？
A. [Ada:sales, Bob:sales, Bob:hr, Eva:hr]
B. [sales:Ada, hr:Bob, sales:Bob, hr:Eva]
C. [hr:Eva, hr:Bob, sales:Bob, sales:Ada]
D. [hr:Bob, hr:Eva, sales:Ada, sales:Bob]
正解：B