Which of the following two entities (reading from Left to Right) ca
Practice Operators and Assignments –
Which of the following two entities (reading from Left to Right) can be connected by the dot operator?
In a HashTable Key cannot be null, but Value can be.
Practice hashCode() method –
In a HashTable Key cannot be null, but Value can be.
In which of the following collections is the Input/Output index-bas
Practice Threads –
In which of the following collections is the Input/Output index-based?
How many enumerators will exist if four threads are simultaneously
Practice Threads –
How many enumerators will exist if four threads are simultaneously working on an ArrayList object?
Practice Declarations and Access Control –
What will be the output of the program?
class BoolArray {
boolean [] b = new boolean[3];
int count = 0;
void set(boolean [] x, int i) {
x[i] = true;
++count;
}
public static void main(String [] args) {
BoolArray ba = new BoolArray();
ba.set(ba.b, 0);
ba.set(ba.b, 2);
ba.test();
}
void test() {
if ( b[0] && b[1] | b[2] )
count++;
if ( b[1] && b[(++count - 2)] )
count += 7;
System.out.println("count = " + count);
}
}
Practice Declarations and Access Control –
What will be the output of the program?
class SSBool {
public static void main(String [] args) {
boolean b1 = true;
boolean b2 = false;
boolean b3 = true;
if ( b1 & b2 | b2 & b3 | b2 ) /* Line 8 */
System.out.print("ok ");
if ( b1 & b2 | b2 & b3 | b2 | b1 ) /*Line 10*/
Stringystem.out.println("dokey");
}
}
Practice Declarations and Access Control –
What will be the output of the program?
class Bitwise {
public static void main(String [] args) {
int x = 11 & 9;
int y = x ^ 3;
System.out.println( y | 12 );
}
}
Practice Declarations and Access Control –
What will be the output of the program?
class BitShift {
public static void main(String [] args){
int x = 0x80000000;
System.out.print(x + " and ");
x = x >>> 31;
System.out.println(x);
}
}
Practice Declarations and Access Control –
What will be the output of the program?
public class ExamQuestion7 {
static int j;
static void methodA(int i) {
boolean b;
do {
b = i<10 | methodB(4); /* Line 9 */
b = i<10 || methodB(8); /* Line 10 */
}while (!b);
}
static boolean methodB(int i) {
j += i;
return true;
}
public static void main(String[] args){
methodA(0);
System.out.println( "j = " + j );
}
}
Which one is a valid declaration of a boolean?
Practice Language Fundamentals –
Which one is a valid declaration of a boolean?
Practice Threads –
What will be the output of the program?
class s1 implements Runnable {
int x = 0, y = 0;
int addX() {
x++;
return x;
}
int addY() {
y++;
return y;
}
public void run() {
for(int i = 0; i < 10; i++)
System.out.println(addX() + " " + addY());
}
public static void main(String args[]) {
s1 run1 = new s1();
s1 run2 = new s1();
Thread t1 = new Thread(run1);
Thread t2 = new Thread(run2);
t1.start();
t2.start();
}
}
Practice Threads –
What will be the output of the program?
class MyThread extends Thread {
MyThread() {
}
MyThread(Runnable r) {
super(r);
}
public void run() {
System.out.print("Inside Thread ");
}
}
class MyRunnable implements Runnable {
public void run() {
System.out.print(" Inside Runnable");
}
}
class Test {
public static void main(String[] args) {
new MyThread().start();
new MyThread(new MyRunnable()).start();
}
}
Practice Threads –
What will be the output of the program?
class MyThread extends Thread {
public static void main(String [] args) {
MyThread t = new MyThread();
t.start();
System.out.print("one. ");
t.start();
System.out.print("two. ");
}
public void run() {
System.out.print("Thread ");
}
}
Practice Threads –
What will be the output of the program?
class MyThread extends Thread {
MyThread() {
System.out.print(" MyThread");
}
public void run() {
System.out.print(" bar");
}
public void run(String s) {
System.out.println(" baz");
}
}
public class TestThreads {
public static void main (String [] args) {
Thread t = new MyThread() {
public void run() {
System.out.println(" foo");
}
};
t.start();
}
}
As compared to sliding bearings, ball and roller bearing have
Practice Threads –
As compared to sliding bearings, ball and roller bearing have