多选题为了获取以下的哪些信息您才会访问一个用户的追踪文件? A．追踪SQL语句的统计信息 B．最后一次日志切换的信息 C．所有非默认初始化参数的列表 D．由LGWR产生的错误信息

多选题客户(CUSTOMER)表包括如下的列： CUSTOMER_D NUMBER(9) LAST_NAME VARCHAR2(20) FIRST_NAME VARCHAR2(20) STREET_ADDRESS VARCHAR2(30) CITY VARCHAR2(20) STATE VARCHAR2(15) POSTAL_CODE VARCHAR2(9) 请问有关下列两个SQL语句的陈述哪一个是正确的? (1)SELECT CONCAT(INITCAP(first_name), INITCAP(last_name)) FROM customer; (2)SELECT INITCAP(first_name)‖INITCAP(last_name) FROM customer; A．这两个SQL语句将显示相同的输出结果 B．这两个SQL语句将不显示相同的数据 C．这两个SQL语句查询到的数据是相同的，但是显示将是不同的 D．其中一个语句将执行失败，因为有语法错误

多选题以下单行函数中的哪一个可以用于VARCHAR2列?

多选题Given: 2. class Paratrooper implements Runnable { 3. public void run() { 4. System.out.print (Thread. currentThread() .getName() +" "); 5. } } 6. public class Jump { 7. static Paratrooper p; 8. static {p = new Paratrooper(); } 9. {Thread t1 = new Thread(p, "bob"); t1.start(); } 10. public static void main(String[] args) { 11. new Jump(); 12. new Thread(new Runnable() {public void run() {; } }, "carol").start(); 13. new Thread(new Paratrooper(), "alice").start(); 14. } 15. Jump() {Thread t2 = new Thread(p, "ted"); t2.start();} 16. } Which are true? (Choose all that apply.)

多选题Given: 4. public class Stone implements Runnable { 5. static int id = i; 6. public void run() { 7. try { 8. id = 1 - id; 9. if(id == 0) {pick(); } else {release(); } 10. } catch (Exception e) { } 11. } 12. private static synchronized void pick() throws Exception { 13. System.out.print ("P "); System.out.print("Q "); 14. } 15. private synchronized void release() throws Exception { 16. System.out.print("R "); System.out.print("S "); 17. } 18. public static void main(String[] args) { 19. Stone st = new Stone(); 20. new Thread(st) .start(); 21. new Thread(st) .start(); 22. } } Which are true? (Choose all that apply.)

多选题下面的哪些后台进程同时存在于ASM实例和RDBMS实例中，并且同时支持ASM磁盘组?

多选题Given: 2. class Robot { } 3. interface Animal { } 4. class Feline implements Animal { } 5. public class BarnCat extends Feline { 6. public static void main(String[] args) { 7. Animal af = new Feline(); 8. Feline ff = new Feline(); 9. BarnCat b = new BarnCat(); 10. Robot r = new Robot(); 11. if(af instanceof Animal) System.out.print("1 "); 12. if(af instanceof BarnCat) System.out.print("2 "); 13. if(b instanceof Animal) System.out.print("3 "); 14. if(ff instanceof BarnCat) System.out.print ("4 "); 15. if(r instanceof Animal) System.out .print ("5 "); 16. } 17. } What is the result?

多选题使用DBM_RESOURCE_MANAGER创建一个新的CDB资源管理器计划时，UPDATE_CDB_DEFAULT_DIRECTIVE与UPDATE_CDB_AUTOTASK_DIRECTIVE过程之间有什么区别?

多选题要获取一个用户当前激活的所有角色的列表，应该查询以下哪个数据字典视图? A．DBA_ROLES B．SESSION_ROLES C．DBA_ROLE_PRIVS D．DBA_TAB_PRIVS

多选题Given: 1. public class LaSelva extends Beach { 2. LaSelva() {s = "LaSelva"; } 3. public static void main(String[] args) {new LaSelva().go(); } 4. void go() { 5. Beach[] ba= {newBeach(), newLaSelva(), (Beach) newLaSelva() }; 6. for(Beach b: ba) System.out.print(b.getBeach().s + " "); 7. } 8. LaSelva getBeach() {return this; } 9. } 10. class Beach { 11. String s; 12. Beach() {s = "Beach"; } 13. Beach getBeach() {return this; } 14. } What is the result?

多选题Given: 2. class Big { 3. void doStuff(int x) { } 4. } 5. class Heavy extends Big { 6. // void doStuff(byte b) { } 7. // protected void doStuff(int x) throws Exception { } 8. } 9. public class Weighty extends Heavy { 10. // void doStuff(int x) { } 11. // String doStuff(int x) {return "hi"; } 12. // public int doStuff(int x) {return 7; } 13. // private int doStuff(char c) throws Error {return 1; } 14. } Which method(s), ifuncommented independently, compile? (Choose all that apply.)

多选题Given the following from the java.io.File API: Field Summary: static String separator Method Summary: static File[] listRoots() And given: 2. // insert code here 3. // insert code here 4. public class Eieio { 5. public static void main(String[] args) { 6. try { 7. String s = "subdir" + separator + "myFile.txt"; 8. java.io. File f = new java.io. File(s); 9. java.io. FileReader fr = new java.io. FileReader(f); 10. java.io. File[] r = listRoots(); 11. fr.close(); 12. } 13. catch (Exception e) { } 14. } } And the following four fragments: Ⅰ. import java.io.*; Ⅱ. import static java.io.File.*; Ⅲ. import static java.io.File.separator; Ⅳ. import static java.io.File.listRoots; Which set(s) of fragments, inserted independently on lines 2 and/or 3, will compile?(Choose all that apply.)

多选题在如下的数据字典中，查询哪一个可以列出只有自己拥有的视图?

多选题以下是表INVENTORY中的内容：如果使用如下的SQL语句查询这个库存(INVENTORY)表，哪一个值会第一个显示?SELECTid_numberFROMinventoryWHEREpriceBETWEEN5.00AND15.00ORDERBYdescription,manufacturer_id;

多选题Given: 1. import java.util.*; 2. class Priorities { 3. public static void main(String[] args) { 4. PriorityQueue toDo = new PriorityQueue(); 5. toDo.add("dishes"); 6. toDo.add("laundry"); 7. toDo.add("bills"); 8. toDo.offer("bills"); 9. System.out.print(toDo.size() + " " + toDo.poll()); 10. System.out.print(" " + toDo.peek() + " " + toDo.poll()); 11. System.out.println(" " + toDo.poll() + " " + toDo.poll()); 12. } } What is the result?

多选题以下是PATIENT、PHYSICIAN和ADMISSION表的结果： PATIENT PATIENT_ID NUMBER NOT NULL, Primary Key LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(25) NOT NULL DOB DATE INS_CODE NUMBER PHYSICIAN PHYSICIAN_ID NUMBER NOT NULL, Primary Key LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(25) NOT NULL LICENSE_NO NUMBER(7) NOT NULL HIRE_DATE DATE ADHISSION PATIENT_ID NUMBER NOT NULL, Primary Key, References PATIENT_ID column of the PATIENT table PHYSICIAN_ID NUMBER NOT NULL, Primary Key, References PHYSICIAN_ID column of the PHYSICIAN table ADMIT_DATE DATE DISCHG_DATE DATE ROOH_ID NUHBER Foreign key to ROOM_ID of the ROOM table 如果想提取在某个理疗师(physician)被雇佣之后所有注册的病人(patient)，应使用如下的哪种结构?

多选题在执行备份时，下面哪个属性或特征通过RMAN传递给OSB?假设RMAN客户已经用OSB注册。

多选题假设正在写一个ALTER PROFILE语句来修改默认概要文件的参数值。其要求是：如果一个用户试着登录了三次以上并都失败了，用户在试图再次登录之前需要等待一分钟。以下就是所需的ALTER PROFILE语句： (1)ALFER PROFILE default LIMIT (2)PASSWORD_LIFE_TIME 60 (3)PASSWORD_GRACE_TIME 10 (4)PASSWORD_REUSE_TIME 1800 (5)PASSWORD_REUSE_MAX UNLIMITED (6)FAILED_LOGIN_ATTEMPTS 3 (7)PASSWORD_LOCK_TIME ______ (8)PASSWORD_VERIFY_FUNCTION verify_function; 请问，应该在ALFER PROFILE的第7行中使用以下的哪一个值? A．1 B．60 C．24 D．1/1440

多选题Given: 3. public class BirdHouse { 4. public static void main(String[] args) 5. String r = "0"; 6. int x = -1, y = -5; 7. if(x ＜ 5) 8. if(y ＞ 0) 9. if(x ＞ y) 10. r += "1"; 11. else r += "2"; 12. else r += "3"; 13. else r += "4"; 14. System.out.println(r); 15. } } What is the result?

多选题Given: 2. class Ball { 3. static String s = ""; 4. void doStuff() {s += "bounce "; } 5. } 6. class Basketball extends Ball { 7. void doStuff() {s += "swish "; } 8. } 9. public class Golfball extends Ball { 10. public static void main(String[] args) { 11. Ball b = new Golfball(); 12. Basketball bb = (Basketball)b; 13. b.doStuff(); 14. bb.doStuff(); 15. System.out.println(s); 16. } 17. void doStuff() {s += "fore "; } 18. } What is the result?