1Z0-816 試験問題を無料オンラインアクセス

Given:

Which one is correct?

• A.Three threads are created.
• B.An IllegalThreadStateException is thrown at run time.
• C.Four threads are created.
• D.The compilation fails.

Given:

Which annotation should be used to remove warnings from compilation?

• A.@SuppressWarnings("rawtypes") on main and @SafeVarargs on the print method
• B.@SuppressWarnings("unchecked") on main and @SafeVarargs on the print method
• C.@SuppressWarnings on the main and print methods
• D.@SuppressWarnings("all") on the main and print methods

Assume ds is a DataSource and the EMP table is defined appropriately.

What does executing this code fragment do?

• A.inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', NULL)
• B.throws a SQLException
• C.inserts one row (101, 'SMITH', 'HR')
• D.inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', 'HR')

Given:
List<String> list1 = new ArrayList<>();
list1.add("A");
list1.add("B");
List list2 = List.copyOf(list1);
list2.add("C");
List<List<String>> list3 = List.of(list1, list2);
System.out.println(list3);
What is the result?

• A.An exception is thrown at run time.
• B.[[A, B],[A, B]]
• C.[[A, B], [A, B, C]]
• D.[[A, B, C], [A, B, C]]

Given:

and

Which code fragment on line 1 makes the s1 set contain the names of all employees born before January 1, 1989?

• A.Option B
• B.Option C
• C.Option A
• D.Option D