Java Objective Questions Answers -Chapter 1 Online Quiz Test

• 1. Which class cannot be subclassed (or extended) in java?
  
  

  1. abstract class
  2. parent class
  3. Final class
  4. None of above

• 2. Can we declare abstract static method

  1. Yes
  2. No

• 3. Can we access private class outside the package
  

  1. Yes
  2. No

• 4. Why we use array as a parameter of main method

  1. it is syntax
  2. Can store multiple values
  3. Both of above
  4. None of above

• 5. Suspend thread can be revived by using
  

  1. start() method
  2. Suspend() method
  3. resume() method
  4. yield() method

• 6. Runnable is

  1. Class
  2. Method
  3. Variable
  4. Interface

• 7. Which collection class associates values witch keys, and orders the keys according to their natural order
  
  

  1. java.util.HashSet
  2. java.util.LinkedList
  3. java.util.TreeMap
  4. java.util.SortedSet

• 8. Which method is used to perform DML statements in
  
  JDBC

  1. execute()
  2. executeUpdate()
  3. executeQuery()
  4. None of above

• 9. Which of the following below are valid isolation levels in J2EE

  1. TRANSACTION_READ_UNCOMMITTED
  2. TRANSACTION_SERIALIZABLE
  3. Only A
  4. Both A and B

• 10. Session beans are created by the client submitting the query to the database

  1. True
  2. False

• 11. Which metrhods are utilized to control the access to an object in multi threaded programming

  1. Asynchronized methods
  2. Synchronized methods
  3. Serialized methods
  4. None of above

• 12. In Runnable, many threads share the same object instance

  1. True
  2. False

• 13. Java beans have no types

  1. True
  2. False

• 14. Program which executes applet is known as
  

  1. applet engine
  2. virtual machine
  3. JVM
  4. None of above

• 15. Which statement is static and synchronized in JDBC API

  1. executeQuery()
  2. executeUpdate()
  3. getConnection()
  4. prepareCall()

• 16. The JDBC-ODBC bridge is

  1. Multithreaded
  2. Singlethreaded
  3. Both of above
  4. None of above

• 17. All raw data types should be read and uploaded to the database as an array of

  1. int
  2. char
  3. bollean
  4. byte

• 18. The class java.sql.Timestamp is associated with

  1. java.util.Time
  2. java.sql.Time
  3. java.util.Date
  4. None of above

• 19. Which of the following statements about arrays is syntactically wrong

  1. arrayName[] p = new arrayName[5];
  2. arrayName p[5];
  3. arrayName[] p [];
  4. arrayName p[][] = new arrayName[2][];

• 20. The Externizable interface extends the serializable interface

  1. True
  2. False