?????????????????е????????????????????????????????

?????????

????1???????????????UML???????(??????????)  4

???????
?????????
???????
?????????

????2???????й??????????????????????????Ч??(??????????)   1

??????????????????????80
???????????????100
????????????????????100000
???????????????????50

????3??EJB???????????????????(??????????)    1

????.ear
????.war
????.jar
????.rar

????4???????????????????????????(??????????)   1

??????????е???????????????????????
??????????????????????????????????????????????Щ??????в?????
????????????????????????н??????????????
???????????????????н?????????е????????й?

????5??????????У????????????μ?????????(??????????)  1

????????????
????δ??????????????????
????????洢?????
????????????????

????6??????????????SQL???

????CREATE TABLE dept (deptno NUMBER(2)?? dname VARCNAR2(14)?? 1oc VARCNAR2 (13)); ROLLBACK; DESCRIBE DEPT

?????????????????????????????????(??????????)   3

????DESCRIBE DEPT??佫???????????ORA-04043: object DEPT does not exist.
????ROLLBACK??佫???DEPT????洢???
????DESCRIBE DEPT??佫???DEPT????????????
????DESCRIBE DEPT??佫?????ROLLBACK?????????COMMIT????????????DEPT????????????

????7??Oracle??VARCHAR2???????????(??????????)  1

????4000
????3000
????1000
????2000

????8????????????????У???????????????(??????????)  1

????????????????????????????
?????????????а????????Χ???
??????????????????FROM???
?????????????б??????NOT NULL

????9???????????У????????????????????( ) (??????????)  4

?????????????
??????????????
??????????????
????????????С

????10??????sleep() ?? wait() ?????????????????(??????????)  2

????wait??Object??????
????sleep??????????
?????????????wait???????±?????????????
????sleep???????Thread???????