11)
Given
Float i=4.4f,j=8.5f;
sop((-i==~i+1)+”,”+(-j==~j+1));
wat is output?
a)compilation error
b)true,false
c)false,true
d)true,true
12)which is used to identify the resource but not tell how to reach that resource?
a)URI
b)URL
c)URI or URL
1. class A{
pvsm(string[] args){
char c=97;
sysout(c);
}}
A. 97
B. A
C. Compilation error
D. c
2. Command line argument “ Java Test this is a program”
Class A{
Pvsm(string[] args){
Sysout (args[1]);
}}
A. is
B. this
C. this is aprogram
D. none
3. Valid array declaration(check box)
i)string [][]b;
ii)string []i[];
iii)string i[][];
iV)string i[5][];
. 4. When using join in sql which of the following is fast to load..
i) in increasing order from right to left
ii) in descending order from right to left
iii) in increasing order from left to right
iv) in descending order from left to right
5. Jdbc:odbc driver supports multi threading..
a. true
b. False
6. Name of application resource file is set by the servlet init_param named.
e. application resources
f. application
g. resources
h. messages
7. Which is not an HTTP method
m. Retrieve
n. Post
o. Head
p. Get
8. <html><body>The value of <%=” “%>…what will print
The value of
9. How to find the different values in sql
Ans: Distinct
10. From a MVC perspective, Struts provides the
a. model
b. view
c. controller
11. Which are not true about custom tags?
a. custom tags are not nested
I don’t remember other options
12. One question on JSP flow to find the wrong statement
1. The JSP converts to HTML form
2. All the above
3. Translation to loading and them giving response (Not sure abt this line, But this is a correct statement.)
13. Which option is correct to read the binary file named asd.zip?
a)config.getresourceasstream(/web.inf/asd.zip)
b)config.inputstream(“asd.zip”);
c)context.inputstream(“asd.zip”);
d) context.getresourceasstream(/web.inf/asd.zip)
14. Constructors allow inheritance : True or false
15. Where is the connection closed ..?
Ans: In the finally() method
16. The validating init-param of the ActionServlet is used to
 A. | Bypass calls to the ActionForm validate method |
| B. | Bypass validation of the Struts configuration file |
| C. | Generate an error message if an unknown message key is used |
Answer: B is correct. The default validating=true setting forces a validating XML parser to be used
17. To specify an ActionMapping to use when a request doesn't match any other mapping, you can
| A. | Use an asterisk for the path property |
| B. | Set the "default" property of the mapping to "true" |
| C. | Set the "unknown" property of the mapping to "true" |
| D. | Set the "missing" init-param of the ActionServlet to the mapping's path |
To specify an ActionMapping to use when a request doesn't match any other mapping, you can C is correct! Answer: C is correct.
18. To localize Validator forms, you can
i. Create separate configuration files for each locale
ii. Specify a locale for a form-set
options:
a. Either i or ii
b. Neither i or ii
c. Only i
d. Only ii
20. Declaration of a method in a JSP
a. <%@ method() %>
b. <% method() %>
c. <%! Method() %>
d. <%! Method(); %>
21. Which are all the valid methods in jsp?
a. jspInit()
_jspService()
jspDestroy()
b. _JSPInit()
_JSPService()
c. -JSPInit()
_JSPService()
_JspDestroy()
_JSPdodelete()
_JSPdoget()
_JSPdopost()
22. A code is given …in that he asks, at line 4 of the code which method suits the best
Code contains names of
Elephant
Dog etc upto 4 names …So choose the method which suits
a. getparameterNames()
b. getparametervalues()
c. getparameter()
d. getvalue()
23. abstract class MineA{
string str;
method();{
Class Mine extends MineA{
Pvsm(){
Int [] s = new int [5];
Sysout(some value);
}}
Ans: class Mine should be declared abstract –Compilation error.
24. Boolean b = false
String s;
S= (b= !b)? (b= !b): Hello: hello : (b= !b)? World: world
a. Helloworld
b. helloworld
c. Hello
d. Hello
25. Choose the statement that best describes the relationship between JSP and servlets:--D
| A. | Servlets are built on JSP semantics and all servlets are compiled to JSP pages for runtime usage. |
| B. | JSP and servlets are unrelated technologies. |
| C. | Servlets and JSP are competing technologies for handling web requests. Servlets are being superseded by JSP, which is preferred. The two technologies are not useful in combination. |
 D. | JSPs are built on servlet semantics and all JSPs are compiled to servlets for runtime usage. |
86) class parent{
void method(){
sysout(“parent”)
}
}
class child extends parent{
void method(){
sysout(“Child”)
}
}
Parent obj new child();
What is the output?
87) Preparestatement
88) distinct in sql
89) using forward in jsp
90) redirect and forward in servlet
91) servlet context
92) jsp in relation to servlet
93) if the package name is not known
106) a)config.getresourceasstream(/web.inf/asd.zip)
b)config.inputstream(“asd.zip”);
c)context.inputstream(“asd.zip”);
d)context.getresourceasstream(/web.inf/asd.zip)
146) If methods in older versions of java are used then what happens ..?
Ans: deprecated
147) what’s a correct interface name..?
Ans: ModelInterface
148) Issues in subclassing.
Ans: All of the above.
149) Initial attribute values can be set from deployment descriptor.
Ans False
150) what’s the output…?
<html>
<body>
Value is
<%= ” ” %>
</body></html> Ans: value is
151) When does JVM exit ..?
Ans: System.exit() is called
1) How can you return the number of records in a table?
1. Which of the following types of inheritances do java support?
a.single inheritance
b.multiple inheritance
c.multilevel inheritance
d.hybrid
e.Only single and multiple inheritance
2.) import library.*
Public class Myprogram{}
What should be the name of the java file containing this program?
a.Library.java
b.Myprogram.java
3.) which of the following are the valid comment stmt in java?
a.//
b./**/
c.!---!
d./** **/
4)An object should never directly manipulate the internal data of another object.
This reflects which of the following..
a.encapsulation
b.abstraction
c.polymorphism
d.inheritance
5) public final void amethod(){
Sysout(“amethod”);
Public class Fin extends Base{
Public static void main(String args[]){
Base b=new Base();
b.amethod();}}
Wt is the o/p
a.compile time error caused because final methods must be declared as final itself
b.Compile time error because cannot inherit from a cls with final methods.
c.Runtime error because base is not defined as final.
d.amethod is printed.
5.) class A{
Static void m(){
Sysout(“A”);}}
Class B extends A{
Static void m(){
Sysout(“B”)}}
Class C extends B{
Static void m(){
Sysout(“C”);}}
Class D{
Public static void main(String[] args)
{
C c=new C();
c.m();
B b=c;
b.m();}}
wt s de o/p?
a.AAA
b.ABC
c.CBA
d.CCC
6.) Base class has a method, void method(){}
Which are legal prototypes in a derived cls of this cls.
a.void method(){}
b.int method(){return 0;}
c.void method(int i){}
d.private void method(){}
7.)import java.util.*
Public class Problem
{
Public static void main(String[] args){
Timer timer=new Timer();
Timer.schedule(new TimerTask){
Public void run(){
Sysout(“Exiting”);
Timer.cancel();}}
Sysout(“In 5 sec this appln will exit”);
What will u do to make it compile?
a.Add final infront of the declaration of time variable.
b.A nested class declared within a method has accesss to any final,local variables in scope.
c.Change the ‘s’ in the last Sysout to ‘S’.
d.Change the return type in the public void run method to int.
8.) Which is responsible for java’s platform independent
a.JRE
b.JVM
c.JavaAPI
d.javap
9.)class MyBase{
Public MyBase(int i){}}
Public class Myover extends MyBase{
Public static void main(String args[]){
Myover m=new Myover(10);}
Myover(int i){
Super(i);}
Myover(String s,int i){
This(i);}}
Which could be in include in the Myover(String s,int i) method?
a.Myover m=new Myover();
b.super();
c.this(“Hello”,10)
d.MyBase b=new MyBase(10)
10.)Name the access modifier which when used with a method,makes it available to all the classes in the same package and to all the sub classes of the class?
a.protected
b.private
c.public
d.default
11.)Which are true?
a.Java does not supports inheritance through pointers. T
b.java supports classes but does not support structure,union T
c.java supports multiple inheritance. F
d. to some extent the interface feature provides the desirable features of multiple inheritance to a java programT
12.) import java.io.*
Class Base{
Public void amethod() throws FileNotFoundException{}}
Public class ExcepDemo extends Base{
Public static void main(String argv[]){
ExcepDemo e=new ExcepDemo();}
Public void amethod(){}
Protected ExcepDemo(){
Try{
DatInputStream din= new DataInputSream(system.in);
Sysout(“passing’)
Din.readByte();
Sysout(“couting”);
This.amethod();}
Catch(IO Exception ioe){}}}
Wt s de o/p
a.compile time error due to protected constructor.
b.Compile time error due to method not declared exception
c.Runtime error due to amethod not dec.. exeption
d.compile and run with o/p of passing and continuing
13.)sub class methods can access superclass members /attributes at all time
a.True b.False
14.) class A{
Public int getNumber(int a){
Return a+1;}}
Class B extends A{
Public int getNumber(int a){
Return a+2;}
Public static void main(S args[]){
A a= new A();
Sysout(a.getNumber(0));}
1. Volatile modifier can be serialized.- True or false.
2. Length of datatype int:
a. 64 bits
b. 32 bits.
c. 16 bits.
d. 8 bits
3.something related to map-snippet
Map.put(“ ….. “);
Map.put(“ ….. “);
Ans: compilation error (I think so)
4. some sevlet code:
<name=animals >
<option1= “cat”….>
</select>
8. related to interface- check box
a. cannot be done in java
b. it always allows only static methods
c. it always allows only public methods…………
9. related to struts everything from that website.
10. There will be three codes for jdbc connection which of the three is valid?
i)in the code.. finally{
con.close
}
ii) con.close inside try
iii) con.close inside exception
11.given connection prog asked abt
1. password should be encrypted
2. driver name url wrong
3. incorrect sequence retrival
4…………….
1) What is the output of the following program?
public class SampleJava
{
public static void main(String argv[]){
int i=10;
Method(i,i=5);
}
public static void Method(int a,int b)
{
System.out.println(a+" "+b);
}
}
Output: 10 5
2) Implicit object not available in JSP
a. application
b. session
c. exception
d. config
Answer: exception
Reference: JSP provides certain Implicit Objects listed below.
| Object | Of Kind |
| Out | JSP writer |
| Request | HttpServletRequest |
| Response | HttpServletRespose |
| Session | HttpSession |
| Application | ServletContext |
| Config | Sevlet Config |
| Page | Object |
| PageContext | Page Context => is responsible for generating all other implicit objects. |
3) what will be the output?
public class SampleJava
{
public static void main(String argv[]){
int i='a';
System.out.println(i);
}
}
Output: 97
4)What will be the output ?
public class SampleJava
{
public static void main(String argv[]){
String s1="one";
String s2=new String("one");
if(s1.equals(s2))
System.out.println("equals");
boolean b1=new Boolean(true);
boolean b2=new Boolean(true);
if(b1==b2)
System.out.println("boolean equals");
}
}
Output: equals Boolean equals
5) Similarity between abstract class and interface
Answer: Neither abstract class nor interface can be instatiated
7) Consider a 3rd party class that isn’t directly sortable, which interface is used to make sorting
a. Comparator (I had choosen this choice.. please check) Answer
b. Sorter
c. comparable
d. Sortable
8) Which of the following is a valid declaration for Date?
a. <% Date d= new Date();%>
b. <%! Date d=new Date();%> Answer
c. <%= Date d=new Date();%>
d. ….
10) what is the method used when session object should never be invalidated by servlet container?
a. setTimer(-1);
b. SetMaxTime…
c. ..
setmaxinactiveinterval(-1)(ans)
setmaxinactiveinterval(-1)(ans)