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Test Status
COREJAVARANDOMTEST
Ques 1 :
What all gets printed on the standard output when the class below is compiled and executed by entering "java test lets see what happens". Select the two correct answers.
public class test
{
public static void main(String args[])
{
System.out.println(args[0]+" "+args.length);
}
}
a.
java
b.
test
c.
lets
d.
3
e.
4
f.
5
g.
6
(A) a, b
(B) c, d
(C) b, e
(D) c, e
Ques 2 :
What all gets printed when the following gets compiled and run. Select the three correct answers.
public class test {
public static void main(String args[]) {
int i=1, j=1;
try {
i++;
j--;
if(i/j > 1)
i++;
}
catch(ArithmeticException e) {
System.out.println(0);
}
catch(ArrayIndexOutOfBoundsException e) {
System.out.println(1);
}
catch(Exception e) {
System.out.println(2);
}
finally {
System.out.println(3);
}
System.out.println(4);
}
}
a.
0
b.
1
c.
2
d.
3
e.
4
(A) a, b, c
(B) b, c, d
(C) a, d, e
(D) a, c, d
Ques 3 :
What is the result of compiling and running the following program. Select one correct answer.
public class test
{
public static void main(String args[])
{
int i = -1;
i = i >> 1;
System.out.println(i);
}
}
(A) 255
(B) 128
(C) -1
(D) 1
Ques 4 :
Select the one correct answer. Which method defined in Integer class can be used to convert an Integer object to primitive int type.
(A) valueOf
(B) intValue
(C) getInt
(D) getInteger
Ques 5 :
A top level class may have only the following access modifier. Select the one correct answer.
(A) package
(B) protected
(C) private
(D) public
Ques 6 :
Which operator is used to perform bitwise exclusive or.
(A) &
(B) ^
(C) |
(D) !
Ques 7 :
After the following code fragment, what is the value in fname?
String str;
int fname;
str = "Foolish boy.";
fname = str.indexOf("fool");
(A) 0
(B) 2
(C) -1
(D) 4
Ques 8 :
How can you ensure that the memory allocated by an object is freed. Select the one correct answer.
(A) By invoking the free method on the object.
(B) By calling system.gc() method.
(C) By setting all references to the object to new values (say null).
(D) Garbage collection cannot be forced. The programmer cannot force the JVM to free the memory used by an object.
Ques 9 :
What are the things we have to follow while creating annotations?
(A) methods must not have any throws clauses
(B) methods must not have any parameters
(C) method should return any one of primitive data types
(D) All the above
Ques 10 :
Given the following declarations, which of the assignments given in the options below would compile. Select the two correct answers.
int i = 5;
boolean t = true;
float f = 2.3F;
double d = 2.3;
a.
t = (boolean) i;
b.
f = d;
c.
d = i;
d.
i = 5;
e.
f = 2.8;
(A) a,b
(B) b,c
(C) c,d
(D) a,d
Ques 11 :
What is the value of â??numberâ?? after the following code fragment execution?
int number = 0;
int number2 = 12
while (number < number2)
{
number = number + 1;
}
(A) 5
(B) 12
(C) 13
(D) 21
Ques 12 :
Which all lines are part of the output when the following code is compiled and run. Select the one correct answer.
public class test
{
public static void main(String args[])
{
for(int i = 0; i < 3; i++)
{
for(int j = 3; j <= 0; j--)
{
if(i == j) continue;
System.out.println(i + " " + j);
}
}
}
}
(A) 1 2
(B) 1 3
(C) 2 0
(D) The program does not print anything.
Ques 13 :
Which of the following statements is true?
(A) The default char data type is a space( â?? â?? ) character.
(B) The default integer data type is â??longâ?? and real data type is â??floatâ??
(C) The default integer data type is â??intâ?? and real data type is â??doubleâ??
(D) The default integer data type is â??intâ?? and real data type is â??floatâ??
Ques 14 :
Which of the following are legal identifier names in Java. Select the two correct answers.
a.
%abcd
b.
$abcd
c.
1abcd
d.
package
e.
_a_long_name
(A) a, c
(B) b, d
(C) b, e
(D) a, e
Ques 15 :
Which statement about static inner class is true?
(A) A static inner class does not require an instance of the enclosing class.
(B) A static inner class cannot be a static member of outer class.
(C) It must extend enclosing class.
(D) Itâ??s variables and methods must be static.
Ques 16 :
What gets displayed on the screen when the following program is compiled and run. Select the one correct answer.
protected class example {
public static void main(String args[]) {
String test = "abc";
test = test + test;
System.out.println(test);
}
}
(A) The class does not compile because the top level class cannot be protected.
(B) The program prints "abc"
(C) The program prints "abcabc"
(D) The program does not compile because statement "test = test + test" is illegal.
Ques 17 :
What all gets printed when the following code is compiled and run. Select the three correct answers.
class test
{
public static void main(String args[])
{
int i[] = {0,1};
try
{
i[2] = i[0] + i[1];
}
catch(ArrayIndexOutOfBoundsException e1)
{
System.out.println("1");
}
catch(Exception e2)
{
System.out.println("2");
}
finally
{
System.out.println(3);
}
System.out.println("4");
}
}
a.
1
b.
2
c.
3
d.
4
(A) 1 2 4
(B) 4
(C) 1 3 4
(D) 1 2 3
Ques 18 :
What happens when the following program is compiled and run. Select the one correct answer.
public class example
{
int i = 0;
public static void main(String args[])
{
int i = 1;
i = change_i(i);
System.out.println(i);
}
public static int change_i(int i)
{
i = 2;
i *= 2;
return i;
}
}
(A) The program prints 0.
(B) The program prints 1.
(C) The program prints 2.
(D) The program prints 4.
Ques 19 :
Which of the following statements is false about objects?
(A) An instance of a class is an object
(B) Objects can access both static and instance data
(C) Objects do not permit encapsulation
(D) Object is the super class of all other classes
Ques 20 :
Using up to four characters what is the Java representation of the number 23 in hex?
(A) 0x17
(B) 0x18
(C) 0x19
(D) 0x20
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