Java Programming and Technical

To a server method, the client wants
to send a value 20, with this value exceeds to 20 a
message should be sent to the client . What will you do
for achieving this?

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Java Other Question

void start() {
A a = new A();
B b = new B();
a.s(b);
b = null; /* Line 5 */
a = null; /* Line 6 */
System.out.println("start completed"); /* Line 7 */
}

When is the B object, created in line 3, eligible for garbage collection?

A. after line 5
B. after line 6
C. after line 7
D. There is no way to be absolutely certain. How do you invoke a Servelet? What is
the difference between doPost method and doGet method?