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INDUS PLACEMENT PAPERS -------- PLACEMENT PAPER-1



INDUS PLACEMENT PAPERS -------- PLACEMENT PAPER-1..

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INDUS PLACEMENT PAPERS - INDUS INTERVIEW PROCEDURE

INDUS APTITUDE QUESTIONS - INDUS TECHNICAL QUESTIONS


INDUS java QUESTIONS ---java interview questions


What is the output of the following code when compiled and
run? Select two correct answers.
public class Question01 {
public static void main(String[] args){
int y=0; //line 1
int x=z=1; //line 2
System.out.println(y+","+x+","+z); //line 3
}
}
A. Prints 0,1,1
B. Error during compilation at line 1
C. Prints 0,0,1
D. Error during compilation at line 3
E. Error during compilation at line 2

2. Question 2. Select three correct
statements.
A. The garbage collection thread cannot outlive the last
user thread.
B. The garbage collection can be forced by invoking
System.gc().
C. The garbage collection thread is a non-deamon thread.
D. The finalize() method is invoked at most once by the JVM
for any given object.
E. The finalize() method may resurrect the object upon
which it has been invoked.

3. What is the output of the following
code when compiled and run? Select one correct answer.
import java.io.*;
public class Question05 {
public static void main(String[] args) {
Question05Sub myref = new Question05Sub();
try{
myref.test();
}catch(IOException ioe){}
}
void test() throws IOException{
System.out.println("In Question05");
throw new IOException();
}
}
class Question05Sub extends Question05 {
void test()throws IOException {
System.out.println("In Question05Sub");
}
}
A. Prints:
In Question05Sub
B. Prints:
In Question05
C. Prints:
In Question05
In Question05Sub
D. Prints:
In Question05Sub
In Question05
E. The code does not compile.

4. Select two correct statements about
the code given below?
class A{}
class B extends A implements E{} //line 1
class C extends A{}
class D extends B{}
interface E{}
public class Question07 {
public static void main(String[] args) {
A a = new D(); //line 2
C c = new C(); //line 3
E e = (E)a; //line 4
B b = (B)e; //line 5
}
}
A. The code compiles without error and runs fine.
B. Compilation error on line 1 because interface E is not
yet declared (forward-referencing).
C. Compilation error on line 4 because class A does not
implement interface E.
D. The cast on line 4 is mandatory.
E. The cast on line 5 is not mandatory.

5. How many objects are eligible for
garbage collection immediately after line 1? Select one
correct answer.
public class Question08 {
public static void main(String[] args) {
Question08 q08 = new Question08();
q08.doSomething(); //line 1
Thread.sleep(20000);
}
public void doSomething(){
Object[] objArray = new Object[2];
for(int i=0;i<objArray.length;i++){
objArray[i] = new Object();
}
}
}
A. 0
B. 1
C. 2
D. 3
E. 4

6. What is the output of the following
code when compiled and run? Select one correct answer.
public class Question09 {
public static void main(String[] args) {
try {
int i = (int)(Math.random()*10);
if(i<=5)
System.out.println("i = "+i);
else
throw new Exception("i > 5");
} catch (Exception e){
System.err.println(e.getMessage()+" (i="+i+")");
}
}
}
A. The output cannot be determined.
B. Compilation error.
C. An exception is thrown at runtime.
D. Output is i = 2
E. Output is i > 5 (i=6)

7. What is the output of the following
code when compiled and run? Select one correct answer.
public class Question10 {
public static void main(String[] args) {
new Question10().doSomething();
}
public void doSomething(){
int i=5;
Thread t = new Thread(new Runnable(){
public void run(){
for(int j=0;j<=i;j++){
System.out.print(" "+j);
}
}
});
t.start();
}
}
A. Prints 0 1 2 3 4
B. Compilation error.
C. No output.
D. IllegalThreadStateException is thrown at runtime.
E. Prints 0 1 2 3 4 5

8. What is the output of the following
code when compiled and run? Select one correct answer.
public class Question11 {
public static void main(String[] args) {
StringBuffer buf1 = new StringBuffer("Hello W");
addSomeStuff(buf1);
System.out.println(buf1.toString());
}
public static void addSomeStuff(StringBuffer buf){
StringBuffer b = buf.replace(6,10,"orld");
System.out.println(b.delete(0,1).toString());
}
}
A. Prints
Hello World
Hello World
B. Prints
Hello orld
Hello orld
C. Prints
Hello orld
ello orld
D. Prints
ello orld
ello orld
E. Compilation error.

9. What is the output of the following
code when compiled and run? Select two correct answers.
(Note: when an instance of a Vector is printed, its content
appear between square brackets [])
import java.util.*;
public class Question13 {
public static void main(String[] args) {
Vector col = new Vector();
col.add(new Integer(1));
col.add(new Integer("2"));
col.add(new Float(3.2d)); //line 1
col.add(col.elementAt(1));
col.setElementAt(col.elementAt(2),0);
System.out.println(col);
}
}
A. Compilation error on line 1.
B. Only line 1 won't compile.
C. The code compiles and runs fine.
D. Prints [3.2, 2, 3.2, 2]
E. Prints [1, 2, 3.2, 2]

10. Select three correct statements.
A. A static method may override another static method.
B. A static method cannot override a non-static method.
C. A non-static method cannot override a static method.
D. A non-static method may be overloaded by a static
method.
E. A synchronized method cannot be overridden




INDUS PLACEMENT PAPERS - INDUS INTERVIEW PROCEDURE

INDUS APTITUDE QUESTIONS - INDUS TECHNICAL QUESTIONS


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