READ Free Dumps For Oracle- 1z0-803
| Question ID 21923 | Given the code fragment:
interface SampleClosable {
public void close () throws java.io.IOException;
}
Which three implementations are valid?
|
| Option A | public class Test implements SampleCloseable {
Public void close () throws java.io.IOException {
/ / do something
}
}
|
| Option B | public class Test implements SampleCloseable {
Public void close () throws Exception {
/ / do something
}
}
|
| Option C | public class Test implementations SampleCloseable {
Public void close () throws Exception {
/ / do something
}
}
|
| Option D | public class Test extends SampleCloseable {
Public void close () throws java.IO.IOException {
/ / do something
}
}
|
| Correct Answer | D |
Explanation Explanation: To declare a class that implements an interface, you include an implements clause in the class declaration. One interface might extended another interface, but a class cannot extend an interface. Checked exceptions are subject to the Catch or Specify Requirement. All exceptions are checked exceptions, except for those indicated by Error, RuntimeException, and their subclasses.
| Question ID 21924 | Given the code fragment:
Int [] [] array = {{0}, {0, 1}, {0, 2, 4}, {0, 3, 6, 9}, {0, 4, 8, 12, 16}}; Systemout.printIn(array [4] [1]);
System.out.printIn (array) [1][4]);
int [] [] array = {{0}, {0, 1}, {0, 2, 4}, {0, 3, 6, 9}, {0, 4, 8, 12, 16}}; System.out.println(array [4][1]);
System.out.println(array) [1][4]);
What is the result?
|
| Option A | 4
Null
|
| Option B | Null
|
| Option C | An IllegalArgumentException is thrown at run time
|
| Option D | 4
An ArrayIndexOutOfBoundException is thrown at run time
|
| Correct Answer | D |
Explanation Explanation: The first println statement, System.out.println(array [4][1]);, works fine. It selects the element/array with index 4, {0, 4, 8, 12, 16}, and from this array it selects the element with index 1, 4. Output: 4 The second println statement, System.out.println(array) [1][4]);, fails. It selects the array/element with index 1, {0, 1}, and from this array it try to select the element with index 4. This causes an exception. Output: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 4