Practice Language Fundamentals –
What will be the output of the program?
public class CommandArgsThree {
public static void main(String [] args) {
String [][] argCopy = new String[2][2];
int x;
argCopy[0] = args;
x = argCopy[0].length;
for (int y = 0; y < x; y++) {
System.out.print(" " + argCopy[0][y]);
}
}
}and the command-line invocation is
java CommandArgsThree 1 2 3
Which of the following are Java reserved words?
Practice Language Fundamentals –
Which of the following are Java reserved words?
Which interface does java.util.Hashtable impleme
Practice Language Fundamentals –
Which interface does java.util.Hashtable implement?
Which of the following would compile without error?
Practice Language Fundamentals –
Which of the following would compile without error?
What is the value of “d” after this line of code has been executed?
Practice Language Fundamentals –
What is the value of “d” after this line of code has been executed?
double d = Math.round ( 2.5 + Math.random() );
Which of the following is/are legal method declarations?
Practice Language Fundamentals –
Which of the following is/are legal method declarations?
protected abstract void m1();
static final void m1(){ }
synchronized public final void m1() { }
private native void m1();
Practice Language Fundamentals –
What will be the output of the program?
public class Test {
public int aMethod() {
static int i = 0;
i++;
return i;
}
public static void main(String args[]) {
Test test = new Test();
test.aMethod();
int j = test.aMethod();
System.out.println(j);
}
}
A variable defined within a block is visible.
Practice Language Fundamentals –
A variable defined within a block is visible.
Practice Language Fundamentals –
What will be the output of the program?
import java.util.*;
class H {
public static void main (String[] args) {
Object x = new Vector().elements();
System.out.print((x instanceof Enumeration)+",");
System.out.print((x instanceof Iterator)+",");
System.out.print(x instanceof ListIterator);
}
}
Which of the following is true in Java?
Practice Language Fundamentals –
Which of the following is true in Java?
Which of the following is true in Java?
Practice Language Fundamentals –
Which of the following is true in Java?
What will be the output of the program?
String s = "A
Practice Language Fundamentals –
What will be the output of the program?
String s = "ABC";
s.toLowerCase();
s += "def";
System.out.println(s);
Practice Language Fundamentals –
What will be the output of the program?
class Q207 {
public static void main(String[] args) {
int i1 = 5;
int i2 = 6;
String s1 = "7";
System.out.println(i1 + i2 + s1); /* Line 8 */
}
}
Practice Language Fundamentals –
What will be the output of the program?
public class Test178 {
public static void main(String[] args) {
String s = "foo";
Object o = (Object)s;
if (s.equals(o)) {
System.out.print("AAA");
}
else {
System.out.print("BBB");
}
if(o.equals(s)) {
System.out.print("CCC");
}
else {
System.out.print("DDD");
}
}
}
What will be the output of the program?
String x = ne
Practice Language Fundamentals –
What will be the output of the program?
String x = new String("xyz");
String y = "abc";
x = x + y; How many String objects have been created?