java june 2012 76 marks paper4

7/26/2019 Java June 2012 76 Marks Paper4

1/11

[30] Which exception may be thrown if the given code is executed giving 2 integer

runtime arguments

class sample{

public static void main(tring args[]!

{try

{

int a"#nteger$parse#nt(args[0]!% int b"#nteger$parse#nt(args[&]!%

int c " a ' b%

ystem$out$println(um is 'c!%

) catch(*rithmetic+xception ae!

{ ystem$out$println(*rithmetic +xception 'ae$get,essage(!!% )

catch(-umber.ormat+xception ne!

{ ystem$out$println(-umber .ormat +xception 'ne$get,essage(!!% ) catch(+xception e!

{ ystem$out$println(+xception 'e!% ))

)

/hoice a

*rithmetic+xception

/hoice b

-umber.ormat+xception

/hoice c

+xception

/hoice d

-one of the above

[2] #n1 ava +xception handling code what could be done in the finally bloc

/hoice a

#t is used to write initiali4ation code

/hoice b

#t can be used to perform house5eeping operations

/hoice c#t can be used to catch all exceptions

/hoice d

#t can be used to ignore all exceptions

[26] #n ava1 what is a condition that is caused by a run5time error in the program

/hoice a


2/11

validity

/hoice b

exception

/hoice c

error/hoice d

action

[27] #n ,ultithreaded programming1 the process of assigning time to thread is nown as

/hoice a

timing

/hoice b

processing

/hoice c

time5slicing

/hoice d

*ssigning

[28] Which of the following step is invalid for creating a pacage

/hoice a

9eclare the pacage in beginning of the file

/hoice b

9efine the classes to be put in the pacage : declare it public

/hoice c

/reate the listing as ;ava in the ubdirectory by pacage menu

/hoice d

+xecute this ;ava file

[2ectors1 hash tables1 random numbers1 date etc

/hoice c

/lasses for #nput?@utput support

/hoice d

/lasses for implementing graphical user interface


3/11

[2A] =he following statements create what type of inheritance if class B and class / are

Base classes

class * extends B extends /{

CC

CCC)

/hoice a

ingle #nheritance

/hoice b

,ultilevel #nheritance

/hoice c

,ultiple #nheritance

/hoice d

Dierarchical #nheritan

[23] What form of #nheritance is not supported by ava

/hoice a

ingle

/hoice b

,ultilevel

/hoice c

,ultiple

/hoice d

Dierarchical

[22] Which of the following is -@= a method of string class

/hoice a

value@f

/hoice b

append

/hoice c

/har*t

/hoice d

index@f

[2&] What statement would better explain what are wrapper classes

/hoice a

Wrapper classes convert primitive datatypes into ob;ect types


4/11

/hoice b

Wrapper classes convert ob;ects to primitive data types

/hoice c

Wrapper classes are used to store list of ob;ects that may vary in si4e

/hoice dWrapper classes are used to convert any class type into array type ob;ect

[20] When a method with same return type and a method with same name

and arguments is defined in uper class as well as subclass$ #f the

method in the subclass is invoed instead of the super class method1what is this concept nown as

/hoice

a

#nheritance

/hoiceb

,ethod @verriding

/hoice

c

,ethod @verloading

/hoice

d

.inal ,ethod

[&] Which of the following visibility modifiers allows widest visibility and is accesible

everywhere/hoice a

private

/hoice b

Erotected

/hoice c

Eublic

/hoice d

.riendly

[&6] What is valid for abstract classes and abstract methods

/hoice a

We cannot use abstract classes to instantiate ob;ects$

/hoice b

abstract methods of an abstract class must be defined in its subclass$

/hoice c


5/11

/onstructers cannot be declared abstract

/hoice d

*ll of the above

[&7] What will be the output of the following code segment

int r"20%while(rF0!

{

r"r5&0%

if(rF0!continue%

ystem$out$print(r is 'r!%

)

/hoice a

r is &0

/hoice br is 0

/hoice c

r is 20

/hoice d

r is 20 r is &0

[&8] Which of the following looping constructs body1 will execute at least once even if

the condition is false$

/hoice a

for/hoice b

do

/hoice c

while

/hoice d

none of the above$

[&


6/11

ystem$out$println(Hy is greater than 4I!%

)

else{

ystem$out$println(H4 is greater than yI!%

)ystem$out$println(Hx is greater than yI!%

)

else{

if(yF4!

{

ystem$out$println(Hy is greater than 4I!%)

)

)

)/hoice a

4 is greater than yx is greater than y

/hoice b

y is greater than 4

x is greater than y

/hoice c

x is greater than y

x is greater than 4

/hoice d

x is greater than y

4 is greater than y

[&A] What will be the output of the following code segment

int a1b%

a"2%b"


7/11

/hoice b

b is

java june 2012 76 marks paper4

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