转 java interview

1.what is oracle.
2.what is major differenece oracle8i and oracle9i.
4.tell me some thing ur self.
5.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 differenec between abstract class and interface.
11.how to u prove that abstrace class cannot instantiate directly.
12.what is differenece between string and stringbuffer.
13.what is immutable
14.how to write a program using sort program.
15 how to write a program using unsort program.
16.what is legacy.
17.what is legacy api
18.what is legacy interface.
19.what is main difference hashmap and hastable
20.what is main difference between arraylist and vector.
21.what is struts framework.
22.what are distributed techonologies.
23.what is advantage and disadvantage of distributed techonologies.
24.what is main difference between jsp and servlets.
25.what is difference between procedure 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 ur project.
31.what is deployment descriptor.
32.what is heirarchy of files in struts.
33.please draw struts frame wrok.
34.please draw j2ee architecture.
35.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 is platfrom independent
41.what is awt and swing.
42.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.why u choose mvc-2 architecture.
48.what is implicit object.
49.how many implicit objects in jsp
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1. Oracle is an RDBMS product with DDL and DML from a company called Oracle Inc.
2. Difference between 8i and 9i is given in the Oracle site
3. Question not available
4. Something
5. oops is Object Oriented Programming
6.what is single inheritance.
ans:one class is inherited by only other one class
7.what is multiple inheritance.
ans:One class inheriting more than one class at atime
8.can java support multiple inheritance.
ans:No
9.what is interface.
ans:Interface has only method declarations but no defn
10.what is differenec between abstract class and interface.
ans:In abstract class some methods may contain definition,but in interface every method should be abstract
11.how to u prove that abstrace class cannot instantiate directly.
ans:As they dont have constructor they cant be instantiated
12.what is differenece between string and stringbuffer.
ans:Strings are immutable where as string buffer can be modified
13.what is immutable
ans:Which cant be changed
14.how to write a program using sort program.
15 how to write a program using unsort program.
ans: Both can be done using javascript
This is for Sort
function SelectTextSort(obj) { // sort by text
var N=obj.options.length;
for (var i=0;ifor (var j=i 1;jif ( obj.options[i].text > obj.options[j].text ) {
var i1= (obj.options[i].selected == true ) ? true : false
var j1= (obj.options[j].selected == true ) ? true : false
var q1 = obj.options[j].text;
var q2 = obj.options[j].value;
obj.options[j].text = obj.options[i].text;
obj.options[j].value = obj.options[i].value;
obj.options[i].text = q1;
obj.options[i].value = q2;
obj.options[i].selected = (j1 && true ) ? true : false
obj.options[j].selected = (i1 && true ) ? true : false
}
}
}
return true
}
16.what is legacy.
17.what is legacy api
18.what is legacy interface.
ans: legacy is something that is old in terms of technology/ system
19.what is main difference hashmap and hastable
ans:Hash table is synchronised
20.what is main difference between arraylist and vector.
ans:Vector is synchronised
21.what is struts framework.
22.what are distributed techonologies.
distributed technologies means any technology / s/w program that are having many components in multiple environments that interact with each other depending on the functional requirements and design.
23.what is advantage and disadvantage of distributed techonologies.
overdependance on single platform / single language is avoided. Application can be built flexible to meet requirements. Division of labour is possible. Best of all the technologies and platforms can be optimally utilized. Complexity of requirements can be reduced.
25.what is difference between procedure and functions.'
ans:Fuctions can return value ,procedures cant return value
26.what is jdbc.
ans:Connecting to DB from java program requires JDBC
27.what are type of drivers.
type1,2,3,4
29.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 say:
Project related process: Analysis, Design, Sign-off Documents, Implementation, Integration, Testing, UAT
Work related process:
Technical Design, Work Allocation, Code Review Checklist, Unit Test Form will be prepared by the Project Lead and given to the developer.
Developer prepares the Unit Test Case
Implements Code, Performs Test
Submits Code through CVS / VSS
Submits documents along with Release Checklist to the tester / leader.
31.what is deployment descriptor.
ans:Which contains the infrnmation like which file to be used
不好意思,暂缺32到39的参考答案.
40.what is platfrom independent
ans:A language is said to be platform independent if it can be run on any machine with out modifying code
41.what is awt and swing.
ans:AWT are heavy weight components and swings are light weight components
46.what is major concepts in oops.
ans:Abstraction,polymorphism,encapsulation,inheritance
47.why u choose mvc-2 architecture.
ans:In MVC-2 controller is servlet rather than JSP which makes it efficient
48.what is implicit object.
ans:Implicit objects are a set of Java objects that the JSP Container makes available to developers in each page
49.how many implicit objects in jsp
ans:out,page,session,request,response,application,page context,config