Objective Questions. BCA Part III Paper XIX (Java Programming) page 1 of 5

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1 Objective Questions BCA Part III page 1 of 5 1. Java is purely object oriented and provides - a. Abstraction, inheritance b. Encapsulation, polymorphism c. Abstraction, polymorphism d. All of the above 2. Compilation is the process of converting the code into language that is a. Assembly language b. Machine language c. High level language d. Low level language 3. is the ability of an application to perform multiple tasks at the same time. a. Dynamic language b. Interpreted c. Multithreading 4. The new operator is used to create a a. Function object b. Class object c. Method object 5. Operator which concatenates two strings is a. * b. c In Java, a class that is inherited is called a. Subclass b. Superclass c. a and b 7. Which keyword is used to derive a class from a superclass? a. Implements b. Extends c. Package 8. To display data on screen used (a) println( ) (b) print( ) (c) none of the above (d) a & b

2 page 2 of 5 9. Super keyword is used for a. Calling super class constructor b. To access hidden member of super class c. Both s & b 10. By default all the method in interface is a. Public b. Abstract c. a & b d. All of the above 11. How many relationship in Java (a) 4 (b) 2 (c) 3 (d) The two major classes for byte streams are a. Input and output b. Input stream and output stream c. Reader and writer classes 13. How many access specifier are there in Java. (a) 3 (b) 2 (c) Protected access specifiers are accesses (a) Accessiables to the subclasses of the class in which they are declared (b) Accessiables to all class (implicitly & explicitly) (b) Both a & b 15. Constructor of a class (a) can be overridden (b) can't be overridden (c) both a & b (d) non of the above 16. The class 'Graphics' comes from package (a) java (b) awt (c) jawa.awt (d) Both a & b 17. class abc {

3 Public static void main (String ar[]) { int x=10; int y=25; System.out.println("Sum of numbers = " + y+ x); } } Output of the above program: (a) Sum of numbers = 250 (b) Sum of numbers = 15 (c) Sum of numbers = 1025 (b) None of the above page 3 of By default all the method in interface are (a) Public (b) Abstract (c) a & b (d) All of the above 19. Which keyword is used for implementing an interface (a) Extends (b) Package (c) Implements 20. Which mechanism is used in Java when an abnormal event occur during program execution and stop flow of instruction. (a) Exception handling (b) Exception (c) Inheritance Long Answer Type 1 (a) Discuss the exception handling in JAVA? Write an applet that reads the name of a person and prints characters in it after reversing the cases of each of them. 1 (b) Explain Java Networking using UDP. Describe in detail Java Collection classes. 2 (a) Discuss about the various layouts in Java AWT. Write a detailed summary on JDBC. 2 (b) Write the difference between string and string buffer class. How the multiple inheritances are achieved-in JAVA? 3 (a) What are the restriction on an applet?what is an event? 3 (b) what do you mean by event listener and event handling? 4 (a) What is the life cycle of an applet?what is an inner class? 4 (b) Draw and explain the JDBC application architecture? Explain the types of JDBC drives? 5 (a) Explain the difference between HeavyWeight component and LightWeight component in swing?

4 page 4 of 5 5 (b) Give the relation between JDBC and ODBC? Explain the every aspect? 6 (a) Write an applet program to change the background color of an applet window as soon as click on a button. 6 (b) Write a program to create an applet that includes login-name and password. Users are allowed to gives logindetail at most three times otherwise window will be closed. 7 (a) Write a program to create an applet that have menu item and check the item using checkbox? 7 (b) What is swing? Explain the features of swing with the example? 8 (a) Write an applet program to change the background color of an applet window as soon as click on a button. 8 (b) What is swing? Explain the features of applet with the example? 9 (a) What do you mean by constructor overloading? Define finalize() method 9 (b) Distinguish the difference between throw and throws with suitable examples. 10 (a) What is package? 10 (b) What is the static data member and static member function? Explain with example 11 (a) What is function overloading? Explain their property with suitable example. 11 (b) write a program to accept a matrix[3][3] order and print the transpose matrix? 12 What do you mean by an exception? What is difference in user defined exception and built-in exceptions in java? 13 (a) Explain life cycle of an applet with examples. 13 (b) What is the difference between applet an applications? 14. What is thread? Explain multithreading and different states of a thread with example. 15. (a) What is the difference between == and string.equals() method? 15 (b) What is the difference between string and StringBuffer class? 16 What is difference between overloading and overriding? Explain with example. 17 (a) What is JDBC? Explain. 17 (b) Write the steps to connect java application with any database to fetch the data from any table of that database. 18 (a) write a program to create an applet that have one list and select your item using multi selection. 18 (b) What is deconstructor? Why it is need? Explain. 19 (a) Write a program to create an applet that have one list and one button when you are click the button then remove the item from the list? 19 (b) write a program to accept a number and check that the number is palindrome or not.

5 page 5 of 5 20 Distinguish between character I/O and stream I/O in java and explain which one is better and why? 20 (b) Write a program in java to read/write an integer number from to file.

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