Tech Olympiad level 2

Which class provides system independent server side implementation?

• Server

• ServerReader

• Socket

• ServerSocket

Which of these statements is incorrect about Thread?

• start() method is used to begin execution of the thread

• run() method is used to begin execution of a thread before start() method in special cases

• A thread can be formed by implementing Runnable interface only

• A thread can be formed by a class that extends Thread class

Which of the following are legal lines of code?

1. int w = (int)888.8;

2. byte x = (byte)1000L;

3. long y = (byte)100;

4. byte z = (byte)100L;

• 1 and 2

• 2 and 3

• 3 and 4

• All statements are correct

Which three are methods of the Object class?

1. notify();

2. notifyAll();

3. isInterrupted();

4. synchronized();

5. interrupt();

6. wait(long msecs);

7. sleep(long msecs);

8. yield();

• 1,2,4

• 2,4,5

• 1,2,6

• 2,3,4

Which class does not override the equals() and hashCode() methods, inheriting them directly from class Object?

• java.lang.String

• java.lang.Double

• java.lang.StringBuffer

• java.lang.Character

____is used to find and fix bugs in the Java programs.

• JVM

• JRE

• JDK

• JDB

An interface with no fields or methods is known as a____

• Runnable Interface

• Marker Interface

• Abstract Interface

• CharSequence Interface

Which of the following is an immediate subclass of the Panel class?

• Applet class

• Window class

• Frame class

• Dialog class

What is meant by the classes and objects that dependents on each other?

• Tight Coupling

• Cohesion

• Loose Coupling

• None of the above

Which of the following code segment would execute the stored procedure "getPassword()" located in a database server?

• CallableStatement cs = connection.prepareCall(" (call.getPassword()}"); cs.executeQuery():

• CallabledStatement callable = conn.prepareCall("(call getPassword())"); callable.executeUpdate();

• CallableStatement cab = con.prepareCall("(call getPassword())"); cab.executeQuery()

• Callablestatement cstate = connect prepareCall("(call getpassword())"); cstate.executeQuery();