多选题Given:
3. class Sport {
4. Sport play() {System.out.print("play "); return new Sport(); }
5. Sport play(int x) {System.out.print ("play x "); return new Sport(); }
6. }
7. class Baseball extends Sport {
8. Baseball play() {System.out.print("baseball "); return new Baseball(); }
9. Sport play(int x) {System.out.print("sport "); return new Sport(); }
10.
11. public static void main(String[] args)
12. new Baseball() .play();
13. new Baseball() .play(7);
14. super.play (7);
15. new Sport().play();
16. Sport s = new Baseball();
17. s.play();
18. }}
What is the result?
多选题完全备份和完整数据库备份有什么区别?
多选题Given:
1. public class Endless {
2. public static void main(String[] args) {
3. int i = 0;
4. short s = 0;
5. for(int j = 0, k = 0; j ＜ 3; j++);
6. for(int j = 0; j ＜ 3; counter(j));
7. for(int j = 0, int k = 0; j ＜ 3; j++);
8. for(; i ＜ 5; counter(5), i++);
9. for(i = 0; i ＜ 3; i++, System.out.print("howdy "));
10. }
11. static int counter(int y) {return y + i; }
12. }
What is the result? (Choose all that apply.)
多选题RMAN被配置为自动备份控制文件和SPFILE。使用下面的RMAN命令执行了完整PDB备份：
RMAN＞connect target /
RMAN＞backup pluggable database ccrepos;
之后不久，丢失了控制文件的所有副本。有什么选项可恢复控制文件?
多选题什么时候索引会降低查询的速度?
多选题Given the invocation "java GiveUp" and:
2. public class GiveUp {
3. public static void main(String[] args) throws Exception {
4. try {
5. assert false;
6. System.out.print("t ");
7. }
8. catch (Error e) {
9. System.out.print("c ");
10. throw new Exception();
11. }
12. finally {System.out.print("f "); }
13. } }
What is the result?