Time remaining
:
:
Test Status
COREJAVARANDOMTEST
Ques 1 :
Using up to four characters, write the Java representation of octal literal 6.
(A) 06
(B) 006
(C) 0006
(D) all of above
Ques 2 :
Which of the following are legal definitions of the main method that can be used to execute a class.
(A) public static int main(String args[])
(B) public void main(String args)
(C) public static void main(String args[])
(D) public static void main(string args[])
Ques 3 :
Consider the following code snippet. What will be assigned to the variable fourthChar, if the code is executed?
String str = new String("Java");
char fourthChar = str.charAt(4);
(A) 'a'
(B) 'v'
(C) throws StringIndexOutofBoundsException
(D) null characater
Ques 4 :
Which of the following are keywords in Java. Select the two correct answers.
a.
friend
b.
NULL
c.
implement
d.
synchronized
e.
throws
(A) d, e
(B) a, b
(C) a, b, c
(D) all of above
Ques 5 :
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 6 :
What all gets printed when the following gets compiled and run. Select the two correct answers.
public class test {
public static void main(String args[]) {
int i=1, j=1;
try {
i++;
j--;
if(i == j)
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
(B) b, c
(C) c, d
(D) d, e
Ques 7 :
Which of the following statements are true. Select the two correct answers.
a.
The wait method defined in the Thread class, can be used to convert a thread from Running state to Waiting state.
b.
The wait(), notify(), and notifyAll() methods must be executed in synchronized code.
c.
The notify() and notifyAll() methods can be used to signal and move waiting threads to ready-to-run state.
d.
The Thread class is an abstract class.
(A) a, c
(B) a, d
(C) b, c
(D) c, d
Ques 8 :
What is the minimum value of char type. Select the one correct answer.
(A) 0
(B) -215
(C) -28
(D) -215 - 1
Ques 9 :
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 subclasses of the class.
(A) public
(B) protected
(C) private
(D) default
Ques 10 :
What gets printed when the following program is compiled and run? Select the one correct answer.
class xyz {
static int i;
public static void main(String args[]) {
while (i < 0) {
i--;
}
System.out.println(i);
}
}
(A) The program does not compile as i is not initialized.
(B) The program compiles but does not run.
(C) The program compiles and runs but does not print anything.
(D) The program prints 0.
Ques 11 :
What is the legal range of values for a variable declared as a byte. Select the one correct answer.
(A) 0 to 255
(B) 0 to 256
(C) -128 to 127
(D) -127 to 128
Ques 12 :
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 13 :
nt index = 1;
Boolean [] test = new Boolean[3];
Boolean data = test[index];
What is the result?
(A) data has the value of true
(B) The code will not compile.
(C) data has the value of false
(D) data has the value of null
Ques 14 :
What is the result of compiling and running the following class. Select the one correct answer.
class Test
{
public void methodA(int i)
{
System.out.println(i);
}
public int methodA(int i)
{
System.out.println(i+1);
return i+1;
}
public static void main(String args[])
{
Test X = new Test();
X.methodA(5);
}
}
Select the one correct answer.
(A) The program compiles and runs printing 5.
(B) The program compiles and runs printing 6.
(C) The program gives runtime exception because it does not find the method Test.methodA(int)
(D) The program give compilation error because methodA is defined twice in class Test.
Ques 15 :
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 16 :
What should be done to invoke the run() method on a thread for an object derived from the Thread class. Select the one correct answer.
(A) The run() method should be directly invoked on the Object.
(B) The start() method should be directly invoked on the Object.
(C) The init() method should be directly invoked on the Object.
(D) The creation of the object using the new operator would create a new thread and invoke its run() method.
Ques 17 :
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 18 :
Which statement is true for the Class java.util.HashSet?
(A) The elements in the collection are unique.
(B) The collection is guaranteed to be immutable
(C) The elements in the collection are ordered.
(D) The elements in the collection are synchronized.
Ques 19 :
What happens when the following code is compiled and run. Select the one correct answer.
for(int i = 1; i < 3; i++)
for(int j = 3; j >= 1; j--)
assert i!=j : i;
(A) The class compiles and runs, but does not print anything.
(B) The number 1 gets printed with AssertionError
(C) The number 2 gets printed with AssertionError
(D) The number 3 gets printed with AssertionError
Ques 20 :
How many bytes are used to represent the primitive data type int in Java. Select the one correct answer.
(A) 2
(B) 4
(C) 8
(D) 1
Submit Answer
Don't Refresh the Page !! ...
