IBMjava英文面試題

1、IBM java英文面試題IBM java英文面試題（附參考答案）1. what is oracle 2. what is major differenece oracle8i and oracle9i 4.tell me some thing ur seif5. please tell me about oops 6. what is single inheritance 7. what is multiple inheritance 8. can java support multiple inheritance 9. what is interface 10.what is differ

2、ence between abstract class and interface 11. how to u provethat abstrace class cannot instantiate directly.12. what is differenece between string and stringbuffer 13. what is immutable14. how to write a program using sort program 15 how to write a program usingunsort program 16. what is legacy 17.

3、what is legacy api1& what is legacy interface 19. what is main difference hashmap and hastable 20. what is maindifferencebetween arraylist and vector 21. what is struts framework 22. what are distributed techonologies 23. what is advantage and disadvantage of distributed techonologies.24. what i

4、s main difference between jsp and servlets 25. what is difference betweenprocedure and functions 26. what is jdbc 27. what are type of drivers 28. what is type 4 driver 29.how to collect requuirements form u r client 30. which process use in urproject 31. what is deployment descriptor 32. what is he

5、irarchy of files in struts.33. please draw struts frame wrok 34. please draw j2ee architecture 33. please draw mvc-2 architecture 36. please draw that how design op module 37. how to find a file on linux 38. how to configure weblogic8 1 on linux 39 why you use struts framework in ur project 40. what

6、 is platfrom independent41. what is awt and swing quality egg, chicken, Development of poultry industry willoccupy a certain area of land, there is a modern product with comprehensive rollupof 50, 000 chickens laying hens, covers an area of14.87hectares (233 acres) more (including Office of hatching

7、, brood rearing, andlaying House, eggs, feed processing workshop, Office, etc) The poultry industryshould work in land conservation, not accounted for or less cultivated land, wasteland,the principle of slope land When the chicken farm should generally not availableto local arable land area to deter

8、mine an appropriate level of breeding size and not,as in the past, first determine the size, then go to the expropriation. 3 energy-saving,water-saving awareness in the 1970 of the 20th century, the pig and chicken farmmechanization in our country forward under the slogan, the country started buildi

9、nga modern large chicken farms in the climax Was built as the fully enclosed intensivechicken farms, using artificial light, mechanical feeding and mandatory ventilation,a small number of chicken farms also use mechanical sets eggs and manure Accordingto statistics, fully enclosed chicken coop per c

10、hicken when the annual electricityconsumption of 10-kilowatt , half opened the henhouse when kW (open), when theentire opening is 0.5 kW , rolling open sheds at 0.45 kW Hen house types, powerconsumption difference is very big, a difference of 10、20 Chinas energy supplyis in short supply. Therefore,

11、in determining the breeding, poultryequipment selectionshould take full consideration of energy saving issues Lack of fresh water resourcesin China, the average annual precipitation is 600 mm. 1988 2474 cubic meters of waterper capita in China, only 1/4 of the population all over the world, now redu

12、ced to2300 cubic meters Hen daily water intake to about 1. 52 times, so when you42. what is heavy wieght components 43. what is feature of weblgoic8 1 44.why you choose application server on linux and database server on aix.45. please tell me about ur project 46. what is major concepts in oops 47. w

13、hy u choose mvc一2 architecture 48. what is implicit object 49. how many implicit objects in jsp30. why choose weblogic8.1 other than any applicationserver 31. what is waterfall model vs sdlc52. what is use of dataflowdiagrams53. wha t is ip in ur project 54. what about reception module1. Oracle is a

14、n RDBMS product with DDL and DML from a company called Oracle Inc2. Difference between 8i and 9i is given in the Oracle site 3.Question not available4. Something3. oops is Object Oriented Programming6. what is single inheritance ans:one class is inherited by only other one class 7. what is multiple

15、inheritance.ans:One class inheriting more than one class at atime8. can java support multiple inheritance ans:No9. what is interface ans:Interface has only method declarations but no defn 10. what is differencebetween abstract class and interface ans:In abstract class some methods may containdefinit

16、ion, but in interface every method sh ould be abstract quality egg, chicken, Development of poultry industry will occupy a certain area of land, there is a modernproduct with comprehensive rollup of 50, 000 chickens laying hens, covers an area of14.87 hectares (233 acres) more (including Office of h

17、atching, brood rearing, andlaying House, eggs, feed processing workshop, Office, etc) The poultry industry shouldwork in land conservation, not accounted for or less cultivated land, wasteland, theprinciple of slope land When the chicken farm should generally not available to localarable land area t

18、o determine an appropriate level of breeding size and not, as inthe past, first determine the size, then go to the expropriation. 3. energy-saving,water-saving awareness in the 1970 of the 20th century, the pig and chicken farmmechanization in our country forward under the slogan, the country starte

19、d buildinga modern large chicken farms in the climax Was built as the fully enclosed intensivechicken farms, using artificial light, mechanical feeding and mandatory ventilation,a small number of chicken farms also use mechanical sets eggs and manure.According to statistics, fully enclosed chicken c

20、oop per chicken when the annualelectricity consumption of 10-kilowatt , half opened the henhouse when 25 kW(open), when the entire opening is 0.5 kW , rolling open sheds at 0.45 kW Henhouse types, power consumption difference is very big, a difference of 10、20. China1s energy supply is in short supp

21、ly. Therefore, in determining the breeding, poultryequipment selection should take full consideration of energy saving issues Lack offresh water resources in China, the average annual precipitation is 600 mm. 1988 2474cubic meters of water per capita in China, only 1/4 of the population all over the

22、world, now reduced to 2300 cubic meters Hen daily water intake to about 1. 52 times,so when you11. how to u prove that abstrace class cannot instantiate directly. ans:As theydont have constructor they cant be instantiated12. what is differenece between string and stringbuffer ans:Strings are immutab

23、lewhere as string buffer can be modified13. what is immutableans:Which cant be changed14. how to write a program using sort program 15 how to write a program using unsort program ans: Both can be done using javascriptThis is for Sortfunction SelectTextSort (obj) / sort by textvar N=obj options lengt

24、h;for (var i二0; iNT ; i+) for (var j=i+l;j obj optionsEj text ) var il= (obj optionsZi selected = true ) ? true : false var jl= (obj optionsjselected二二true ) ? true : false var ql = obj. optionsj text;var q2 = obj. optionsEj.value;obj.optionsEj text = obj. optionsEi text;obj.optionsEj.value = obj.op

25、tionsEi value;obj.optionsEi text = ql:obj.optionsEi.value = q2;obj.optionsEi selected = (jl & true ) ? true : false obj. optionsEj selected= (il & true ) ? true : false return true16 what is legacy 17.what is legacy api18.what is legacy interface quality egg, chicken, Development of poultry

26、industry will occupy a certainarea of land, there is a modern product with comprehensive rollup of 50, 000 chickenslaying hens, covers an area of14.87hectares (233 acres) more (including Office of hatching, brood rearing, andlaying House, eggs, feed processing workshop, Office, etc) The poultry indu

27、stry shouldwork in land conservation, not accounted for or less cultivated land, wasteland, theprinciple of slope land When the chicken farm should generally not available to localarable land area to determine an appropriate level of breeding size and not, as inthe past, first determine the size, th

28、en go to the expropriation. 3. energy-saving,water-saving awareness in the 1970 of the 20th century, the pig and chicken farmmechanization in our country forward under the slogan, the country started buildinga modern large chicken farms in the climax Was built as the fully enclosed intensivechicken

29、farms, using artificial light, mechanical feeding and mandatory ventilation,a small number of chicken farms also use mechanical sets eggs and manure Accordingto statistics, fully enclosed chicken coop per chicken when the annual electricityconsumption of 10-kilowatt , half opened the henhouse when k

30、W (open), when theentire opening is 0.5 kW , rolling open sheds at 0.45 kW Hen house types, powerconsumption difference is very big, a difference of 10、20. Chinas energy supply isin short supply. Therefore, in determining the breeding, poultry equipment selectionshould take full consideration of ene

31、rgy saving issues Lack of fresh water resourcesin China, the average annual precipitation is 600 mm. 1988 2474 cubic meters of waterper capita in China, only 1/4 of the population all over the world, now reduced to2300 cubic meters Hen daily water intake to about 1 52 times, so when youans: legacy i

32、s something that is old in terms of technology/ system19. what is main difference hashmap and hastableans:Hash table is synchronised20. what is main difference between arraylist and vector ans:Vector is synchronised21. what is struts framework 22. what are distributed techonologies distributed techn

33、ologies means any technology / s/w program that are having manycomponents in multiple environments that interact with each other depending on thefunctional requirements and design.23. what is advantage and disadvantage of distributed techonologies overdependance on single platform / single language

34、is avoided Application can be builtflexible to meet requirements Division of labour is possible Best of all thetechnologies and platforms can be optimally utilized.Complexity of requirements can be reduced 25. what is difference between procedureand functions ans:Fuctions can return value , procedur

35、es cant return value26. what is jdbc ans:Connecting to DB from java program requires JDBC27. what are type of drivers typel, 2, 3, 429. how to collect requuirements form u r client is not a job of a technical person. It is better for a BA to do it.30. which process use in ur project Generally u can

36、say:Project related process: Analysis, Design, Sign-off Documents,Implementation, Integration, Testing, UATWork related process:Technical Design, Work Allocation, Code Review Checklist, Unit TestForm will be prepared by the Project Lead and given to the developer quality egg,chicken, Development of

37、poultry industry will occupy a certain area of land,there is a modern product with comprehensive rollup of 50, 000 chickens laying hens,covers an area of14.87hectares (233 acres) more (including Office of hatching, brood rearing, andlaying House, eggs, feed processing workshop, Office, etc) The poul

38、try industry shouldwork in land conservation, not accounted for or less cultivated land, wasteland, theprinciple of slope land When the chicken farm should generally not available to localarable land area to determine an appropriate level of breeding size and not, as inthe past, first determine the

39、size, then go to the expropriation. 3. energy-saving,water-saving awareness in the 1970 of the 20th century, the pig and chicken farmmechanization in our country forward under the slogan, the country started buildinga modern large chicken farms in the climax Was built as the fully enclosed intensive

40、chicken farms, using artificial light, mechanical feeding and mandatory ventilation,a small number of chicken farms also use mechanical sets eggs and manure Accordingto statistics, fully enclosed chicken coop per chicken when the annual electricityconsumption of 10-kilowatt , half opened the henhous

41、e when kW (open), when theentire opening is 0.5 kW , rolling open sheds at 0.45 kW Hen house types, powerconsumption difference is very big, a difference of 10、20 Chinas energy supplyis in short supply. Therefore, in determining the breeding, poultryequipment selectionshould take full consideration

42、of energy saving issues Lack of fresh water resourcesin China, the average annual precipitation is 600 mm. 1988 2474 cubic meters of waterper capita in China, only 1/4 of the population all over the world, now reduced to2300 cubic meters Hen daily water intake to about 1. 52 times, so when youDevelo

43、per prepares the Unit Test CaseImplements Code, Performs TestSubmits Code through CVS / VSSSubmits documents along with Release Checklist to the tester / leader 31. whatis deployment descriptor ans：Which contains the infrnmation like which file to be used40. what is platfrom independentans:A languag

44、e is said to be platform independent if it can be run on any machinewith out modifying code41. what is awt and swing ans:AWT are heavy weight components and swings are light weight components46. what is major concepts in oops ansAbstraction, polymorphism, encapsulation, inheritance47. why u choose m

45、vc一2 architecture ans:In MVC-2 controller is servlet rather than JSP which makes it efficient48. what is implicit object.ans：Implicit objects are a set of Java objects that the JSPContainer makes available to developers in each page49. how many implicit objects in jspans:out, page, session, request,

46、 response, application, page context, configquality egg, chicken, Development of poultry industry will occupy a certainarea of land, there is a modern product with comprehensive rollup of 50,000 chickenslaying hens, covers an area of14.87hectares (233 acres) more (including Office of hatching, brood

47、 rearing, andlaying House, eggs, feed processing workshop, Office, etc) The poultry industry shouldwork in land conservation, not accounted for or less cultivated land, wasteland, theprinciple of slope land When the chicken farm should generally not available to localarable land area to determine an

48、 appropriate level of breeding size and not, as inthe past, first determine the size, then go to the expropriation. 3. energy-saving,water-saving awareness in the 1970 of the 20th century, the pig and chicken farmmechanization in our country forward under the slogan, the country started buildinga mo

49、dern large chicken farms in the climax Was built as the fully enclosed intensivechicken farms, using artificial light, mechanical feeding and mandatory ventilation,a small number of chicken farms also use mechanical sets eggs and manure Accordingto statistics, fully enclosed chicken coop per chicken

50、 when the annual electricityconsumption of 10-kilowatt , half opened the henhouse when kW (open), when theentire opening is 0.5 kW ,rolling open sheds at 0. 45 kW . Hen house types, power consumption difference isvery big, a difference of 10、20. China1s energy supply is in short supply. Therefore,in

51、 determining the breeding, poultryequipment selection should take full considerationof energy saving issues. Lack of fresh water resources in China, the average annualprecipitation is 600 mm. 1988 2474 cubic meters of water per capita in China, only1/4 of the population all over the world, now reduc

52、ed to 2300 cubic meters. Hen dailywater intake to about 1. 5、2 times, so when1（觸發(fā)器的作用，答:觸發(fā)器是一中特殊的存儲(chǔ)過程，主要是通過事件來觸發(fā)而被執(zhí)行的。它可 以強(qiáng)化約束，來維護(hù)數(shù)據(jù)的完整性和一致性，可以跟蹤數(shù)據(jù)庫內(nèi)的操作從而不允許 未經(jīng)許可的更新和變化?？梢月?lián)級(jí)運(yùn)算。如，某表上的觸發(fā)器上包含對(duì)另一個(gè)表的 數(shù)據(jù)操作，而該操作乂會(huì)導(dǎo)致該表觸發(fā)器被觸發(fā)。2。什么是存儲(chǔ)過程，用什么來調(diào)用，答:存儲(chǔ)過程是一個(gè)預(yù)編譯的SQL語句，優(yōu)點(diǎn)是允許模塊化的設(shè)計(jì)，就是說只 需創(chuàng)建一次，以后在該程序中就可以調(diào)用多次。如果某次操作需要執(zhí)

53、行多次SQL,使用存儲(chǔ)過程比單純SQL語句執(zhí)行要快?？梢杂靡粋€(gè)命令對(duì)象來調(diào)用存儲(chǔ)過程。3。索引的作用，和它的優(yōu)點(diǎn)缺點(diǎn)是什么，答:索引就一種特殊的查詢表，數(shù)據(jù)庫的搜索引擎可以利用它加速對(duì)數(shù)據(jù)的檢 索。它很類似與現(xiàn)實(shí)生活中書的LI錄，不需要查詢整本書內(nèi)容就可以找到想要的數(shù) 據(jù)。索引可以是唯一的，創(chuàng)建索引允許指定單個(gè)列或者是多個(gè)列。缺點(diǎn)是它減慢了 數(shù)據(jù)錄入的速度，同時(shí)也增加了數(shù)據(jù)庫的尺寸大小。3。什么是內(nèi)存泄漏,答:一般我們所說的內(nèi)存泄漏指的是堆內(nèi)存的泄漏。堆內(nèi)存是程序從堆中為其 分配的，大小任意的，使用完后要顯示釋放內(nèi)存。當(dāng)應(yīng)用程序用關(guān)鍵字new等創(chuàng)建 對(duì)象時(shí)，就從堆中為它分配一塊內(nèi)存，使用完后程

54、序調(diào)用free或者delete釋放該 內(nèi)存，否則就說該內(nèi)存就不能被使用，我們就說該內(nèi)存被泄漏了。維護(hù)數(shù)據(jù)庫的完整性和一致性，你喜歡用觸發(fā)器還是自寫業(yè)務(wù)邏輯，為什么，4答:我是這樣做的，盡可能使用約束，如check,主鍵，外鍵，非空字段等來約 束，這樣做效率最高，也最方便。其次是使用觸發(fā)器，這種方法可以保證，無論什 么業(yè)務(wù)系統(tǒng)訪問數(shù)據(jù)庫都可以保證數(shù)據(jù)的完整新和一致性。最后考慮的是自寫業(yè)務(wù) 邏輯，但這樣做麻煩，編程復(fù)雜，效率低下。5。什么是事務(wù)，什么是鎖，答:事務(wù)就是被綁定在一起作為一個(gè)邏輯工作單元的SQL語句分組，如果任何 一個(gè)語句操作失敗那么整個(gè)操作就被失敗，以后操作就會(huì)回滾到操作前狀態(tài)，或者

55、 是上有個(gè)節(jié)點(diǎn)。為了確保要么執(zhí)行，要么不執(zhí)行，就可以使用事務(wù)。要將有組語句 作為事務(wù)考慮，就需要通過ACID測試，即原子性，一致性，隔離性和持久性。鎖:在所以的DBMS中，鎖是實(shí)現(xiàn)事務(wù)的關(guān)鍵，鎖可以保證事務(wù)的完整性和并發(fā) 性。與現(xiàn)實(shí)生活中鎖一樣，它可以使某些數(shù)據(jù)的擁有者，在某段時(shí)間內(nèi)不能使用某 些數(shù)據(jù)或數(shù)據(jù)結(jié)構(gòu)。當(dāng)然鎖還分級(jí)別的。6。什么叫視圖,游標(biāo)是什么，答:視圖是一種虛擬的表，具有和物理表相同的功能?？梢詫?duì)視圖進(jìn)行增， 改，查，操作，試圖通常是有一個(gè)表或者多個(gè)表的行或列的子集。對(duì)視圖的修改不 影響基本表。它使得我們獲取數(shù)據(jù)更容易，相比多表quality egg, chicken,. Dev

56、elopment of poultryindustry will occupy a certain area of land, there is a modern product withcomprehensive rollup of 50, 000 chickens laying hens, covers an area of 14. 87 hectares(233 acres) more (including Office of hatching, brood rearing, and laying House, eggs,feed processing workshop, Office,

57、 etc) The poultry industry should work in landconservation, not accounted for or less cultivated land, wasteland, the principle ofslope land When the chicken farm should generally not available to local arable landarea to determine an appropriate level of breeding size and not, as in the past, first

58、determine the size, then go to the expropriation. 3. energy-saving, water-savingawareness in the 1970 of the 20th century, the pig and chicken farm mechanization inour country forward under the slogan, the country started building a modern largechicken farms in the climax Was built as the fully encl

59、osed intensive chicken farms,using artificial light, mechanical feeding and mandatory ventilation, a small numberof chicken farms also use mechanical sets eggs and manure According to statistics,fully enclosed chicken coop per chicken when the annual electricity consumption of10-kilowatt , half open

60、ed the henhouse when 25 kW (open), when the entire openingis 0.5 kW , rolling open sheds at 0. 45 kW Hen house types, power consumptiondifference is very big, a difference of 10、20. Chinas energy supply is in short supply.Therefore, in determining the breeding, poultry equipment selection should take fullconsi