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Test Status
COREJAVARANDOMTEST
Ques 1 :
Which code determines the int value data closer to, but not greater than, a double value b?
(A) Int data = (int) Math.floor(b);
(B) Int data = (int) Math.abs(b);
(C) Int data = (int) Math.ceil(b);
(D) Int data = (int) Math.min(b);
Ques 2 :
Which of the assignment are not valid.
(A) short s = 28;
(B) float f = 2.3;
(C) double d = 2.3;
(D) int I = '1';
Ques 3 :
Which of the following statements are correct. Select the four correct answers.
a.
A Java program must have a package statement.
b.
A package statement if present must be the first statement of the program (barring any comments).
c.
If a Java program defines both a package and import statement, then the import statement must come before the package statement.
d.
An empty file is a valid source file.
e.
A Java file without any class or interface definitions can also be compiled.
f.
If an import statement is present, it must appear before any class or interface definitions.
(A) b, d, e, f
(B) a, b, d, f
(C) d, e, a, c
(D) c, d, b, a
Ques 4 :
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[]) {
String s1 = "abc";
String s2 = new String("abc");
if(s1 == s2)
System.out.println(1);
else
System.out.println(2);
if(s1.equals(s2))
System.out.println(3);
else
System.out.println(4);
}
}
(A) 1 3
(B) 1 4
(C) 2 3
(D) 2 4
Ques 5 :
In implementing two classes Employee and Manager, such that each Manager is an Employee, what should be the relationship between these classes. Select the one correct answer.
(A) Employee should be the base class of Manager class.
(B) Manager should be the base class of Employee class.
(C) Manager class should include the Employee class as a data member.
(D) Employee class should include Manager class as a data member.
Ques 6 :
Which of the following statements are true. Select the one correct answer.
(A) Arrays in Java are essentially objects.
(B) It is not possible to assign one array to another. Individual elements of array can however be assigned
(C) Array elements are indexed from 1 to size of array.
(D) If a method tries to access an array element beyond its range, a compile warning is generated.
Ques 7 :
Which operator is used to perform bitwise exclusive or.
(A) &
(B) ^
(C) |
(D) !
Ques 8 :
What is the number of bytes used by Java primitive long. Select the one correct answer.
(A) The number of bytes is compiler dependent.
(B) 2
(C) 4
(D) 8
Ques 9 :
What is the result of evaluating the expression 14 ^ 23. Select the one correct answer.
(A) 23
(B) 24
(C) 25
(D) 26
Ques 10 :
What all gets printed when the following program is compiled and run. Select the two correct answers.
public class test {
public static void main(String args[]) {
int i, j=1;
i = (j>1)?2:1;
switch(i) {
case 0: System.out.println(0); break;
case 1: System.out.println(1);
case 2: System.out.println(2); break;
case 3: System.out.println(3); break;
}
}
}
a.
0
b.
1
c.
2
d.
3
(A) a, b
(B) b, c
(C) c, b
(D) c, d
Ques 11 :
What is the minimum value of char type. Select the one correct answer.
(A) 0
(B) -215
(C) -28
(D) -215 - 1
Ques 12 :
Given the following code snippet;
int salaries[];
int index = 0;
salaries = new int salaries[4];
while (index < 4)
{
salaries[index] = 10000;
index++;
}
What is the value of salaries [3]?
(A) 40000
(B) 50000
(C) 15000
(D) 10000
Ques 13 :
What will be the output of the program?
class Exc0 extends Exception { }
class Exc1 extends Exc0 { } /* Line 2 */
public class Test
{
public static void main(String args[])
{
try
{
throw new Exc1(); /* Line 9 */
}
catch (Exc0 e0) /* Line 11 */
{
System.out.println("Ex0 caught");
}
catch (Exception e)
{
System.out.println("exception caught");
}
}
}
(A) Ex0 caught
(B) exception caught
(C) Compilation fails because of an error at line 2.
(D) Compilation fails because of an error at line 9.
Ques 14 :
The class java.lang.Exception is ?
(A) protected
(B) implements Throwable
(C) serializable
(D) extends Throwable
Ques 15 :
What gets printed when the following program is compiled and run? Select the one correct answer.
class xyz {
public static void main(String args[]) {
int i,j,k;
for (i = 0; i < 3; i++) {
for(j=1; j < 4; j++) {
for(k=2; k<5; k++) {
if((i == j) && (j==k))
System.out.println(i);
}
}
}
}
}
(A) 0
(B) 1
(C) 2
(D) 3
Ques 16 :
Which of the following are true. Select the one correct answers.
(A) && operator is used for short-circuited logical AND.
(B) ~ operator is the bit-wise XOR operator.
(C) operator is used to perform bitwise OR and also short-circuited logical OR.
(D) The unsigned right shift operator in Java is >>.
Ques 17 :
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 18 :
What is the result of compiling and running the following program. Select the one correct answer.
class test {
public static void main(String args[]) {
int i,j=0;
for(i=10;i<0;i--) { j++; }
switch(j) {
case (0) :
j=j+1;
case(1):
j=j+2;
break;
case (2) :
j=j+3;
break;
case (10) :
j=j+10;
break;
default :
break;
}
System.out.println(j);
}
}
(A) 1
(B) 2
(C) 0
(D) 3
Ques 19 :
Which methods can access to private attributes of a class?
(A) Only Static methods of the same class
(B) Only instances of the same class
(C) Only methods those defined in the same class
(D) Only classes available in the same package.
Ques 20 :
What gets displayed on the screen when the following program is compiled and run. Select the one correct answer.
public class test {
public static void main(String args[]) {
int x, y;
x = 5 >> 2;
y = x >>> 2;
System.out.println(y);
}
}
(A) 5
(B) 2
(C) 80
(D) 0
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