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Q1. Given the code fragment:
What is the result?
A. Jesse 25 Walter 52
B. Compilation fails only at line n1
C. Compilation fails only at line n2
D. Compilation fails at both line n1 and line n2
Answer: D
Q2. Given:
How many objects have been created when the line / / do complex stuff is reached?
A. Two
B. Three
C. Four
D. Six
Answer: C
Q3. Given:
What is the result?
A. Marrown
String out of limits
JesOran
B. Marrown
String out of limits
Array out of limits
C. Marrown
String out of limits
D. Marrown
NanRed
JesOran
Answer: A
Q4. Given the code fragment:
for (int ii = 0; ii < 3;ii++) {
int count = 0;
for (int jj = 3; jj > 0; jj--) {
if (ii == jj) {
++count;
break;
}
}
System.out.print(count); continue; }
What is the result?
A. 011
B. 012
C. 123
D. 000
Answer: A
Q5. Given:
What is the result?
A. true true
B. true false
C. false true
D. false false
E. Compilation fails
Answer: E
Q6. Given the following code:
What are the values of each element in intArr after this code has executed?
A. 15, 60, 45, 90, 75
B. 15, 90, 45, 90, 75
C. 15, 30, 75, 60, 90
D. 15, 30, 90, 60, 90
E. 15, 4, 45, 60, 90
Answer: C
Q7. Which two statements are true for a two-dimensional array of primitive data type?
A. It cannot contain elements of different types.
B. The length of each dimension must be the same.
C. At the declaration time, the number of elements of the array in each dimension must be specified.
D. All methods of the class object may be invoked on the two-dimensional array.
Answer: C,D
Explanation: http://stackoverflow.com/questions/12806739/is-an-array-a-primitive-type-or-an-object-or-something-else-entirely
Q8. Given:
public class ScopeTest {
int j, int k;
public static void main(String[] args) {
ew ScopeTest().doStuff(); }
void doStuff() {
nt x = 5;
oStuff2();
System.out.println("x");
}
void doStuff2() {
nt y = 7;
ystem.out.println("y");
or (int z = 0; z < 5; z++) {
ystem.out.println("z");
ystem.out.println("y");
}
Which two items are fields?
A. j
B. k
C. x
D. y
E. z
Answer: A,B
Q9. Which of the following exception will be thrown due to the statement given here?
int array[] = new int[-2];
A. NullPointerException
B. NegativeArraySizeException
C. ArrayIndexOutOfBoundsException
D. IndexOutOfBoundsException
E. This statement does not cause any exception.
Answer: B
Explanation:
In given statement we can see that, we have passed negative value for creating int array,
which results a NegativeArraySize Except ion. Hence option B is correct.
Option A is incorrect as it is thrown when an application attempts to use null in a case
where an object is required.
Option D is incorrect as IndexOutOfBoundsException thrown to indicate that an index of
some sort (such as to an array, to a string, or to a vector) is out of range.
REFERENCE
rhttpy/docs.oracle.com/iavase/S/docs/api/java/lang/NegativeArraySizeException.html
Q10. Given:
public class Test1 {
static void doubling (Integer ref, int pv) {
ref =20;
pv = 20;
}
public static void main(String[] args) {
Integer iObj = new Integer(10);
int iVar = 10;
doubling(iObj++, iVar++);
System.out.println(iObj+ ", "+iVar);
What is the result?
A. 11, 11
B. 10, 10
C. 21, 11
D. 20, 20
E. 11, 12
Answer: A
Explanation: The code doubling(iObj++, iVar++); increases both variables from to 10 to
11.
Q11. Given the code fragment:
What is the result?
A. Values are : [EE, ME]
B. Values are : [EE, EE, ME]
C. Values are : [EE, ME, EE]
D. Values are : [SE, EE, ME, EE]
E. Values are : [EE, ME, SE, EE]
Answer: E
Q12. Given:
What is the result?
A. The sum is 2
B. The sum is 14
C. The sum is 15
D. The loop executes infinite times
E. Compilation fails
Answer: E
Q13. Given:
Which two classes use the shape class correctly?
A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
F. Option F
Answer: B,E
Explanation: When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class (E). However, if it does not, then the subclass must also be declared abstract (B). Note: An abstract class is a class that is declared abstract—it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.
Q14. Given the code fragment:
What is the result?
A. 10 8 6 4 2 0
B. 10 8 6 4 2
C. AnArithmeticException is thrown at runtime
D. The program goes into an infinite loop outputting: 10 8 6 4 2 0. . .
E. Compilation fails
Answer: B
Q15. Which two actions will improve the encapsulation of a class?
A. Changing the access modifier of a field from public to private
B. Removing the public modifier from a class declaration
C. Changing the return type of a method to void
D. Returning a copy of the contents of an array or ArrayList instead of a direct reference
Answer: A,D
Reference: http://www.tutorialspoint.com/java/java_access_modifiers.htm