Programming Language–III (3415)-solved Assignment-old papers-course outline -aiou-spring 2015

Solved Assighnments

Course: Programming Language–III (3415)

Level: B.S (CS) Semester: Autumn- 2015

Total Marks: 100 Pass Marks: 50

ALLAMA IQBAL OPEN UNIVERSITY, ISLAMABAD

(Department of Computer Science)

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Course: Programming Language–III (3415) Semester: Autumn, 2015

Level: Bachelor Total Marks: 100

Pass Marks: 50

ASSIGNMENT No. 1

Note: All questions carry equal marks.

Q. 1 (a) Explain what a Javaapplication is. Why we use comments in Java applications?

(b) Define and explain the term JVM (Java Virtual Machine).

Q. 2 (a) Why we say that Javais an object oriented language?

(b) Differentiate between JVMand an interpreter.

Q. 3 (a) What is a data type? Write in detail the data types used in Java language.

(b) How arrays are declaredand allocated in Java? Also explain the references and referenceparameters in Java.

Q. 4 The factorial of a nonnegative integer n is written n! (Pronounced “n factorial”) and is defined as follows:

n! = n (n-1) (n-2)… 1 (for values of n greater than or equal to 1) and n! = 1 (for n = 0).

For example, 5! = 5.4.3.2.1, which is 120.

(a) Write an application thatreads a nonnegative integer from an input dialog and computes andprints its factorial.

(b) Write an application that estimates the value of the mathematical constant eby using the formula

Q. 5 Differentiate among the following:

(a) References and referenceparameter

(b) Single subscripted array and multiple subscripted arrays

(c) Third element of array and array element 3
Ans:
Suppose you have an Array
Sring arr[] = {"html","css","java script"};

The third element of the array is "java script" but it's position would be fouind as [2] in the array. You are supposing it as 3, and that's why you are getting the errors.

(d) Applet and application

ASSIGNMENT No. 2

Total Marks: 100

Pass Marks: 50

Note: All questions carry equal marks.

Q. 1 (a) Discuss why casting asuper class reference to a subclass reference potentially dangerous?

(b) What are packages inJava? Briefly describe the Java API packages.

Q. 2 Distinguish between inheriting interface and inheriting implementation. How doinheritance hierarchies designed for inheriting interface differ fromthose designed for inheriting implantation?

Q. 3 (a) Briefly describe the constructors of class string? Also write demonstrating of Stringclass constructors in Java.

(b) Differentiate between abstract super class and concrete classes.

Q. 4 What is polymorphism? Describe with an example.

Q. 5 (a) Write a program inJava having parent and child classes to demonstrate the concept ofinheritance.

(b) Write an applet thatdisplays “SubhanaAllah and Subbakhair Fajir Time” if the currenttime is between 5 a.m. and 7 a.m., “Its Zuhr Prayer time” if thecurrent time is between 12 p.m and 3 p.m., and “SubhanaAllah itsMugrib Prayer Time” if the current time is between 5p.m. and 7 p.m.

(c) Write an applet thatcontains one button. Initialize the label on the button to “Start”.Toggle the button label between these two values each time the buttonis pressed.

Programming Language–III (3415) Credit Hours: 4(3+1)

Recommended Book:

JAVA, How to Program, By Deital & Deital 3^rd Edition

Course Outlines:

Unit No. 1 Introduction to Java Applications

Introduction, Using Comments, Block of Codes, a Simple Java Program

Unit No. 2 Data Types & Arrays

Data Types, Declaring & Allocating Arrays, References and Reference Parameters Searching Arrays, Multiple Subscripted Arrays

Unit No. 3 Control Structures-I

Selection Structure, While Repetition Structure

Unit No. 4 Control Structures-II

For Repetition Structure, Do/While Repetition Structure, Break and Continue, Multiple Selection Structure

Unit No. 5 Object Oriented Programming-I

Introduction to Class, Class Scopes, Creating Packages, Constructors, Set & Get Method, This Reference, Finalizer, Static Class Member

Unit No. 6 Object Oriented Programming-II

Super Class, Sub Classes, Protected Members, Inheritance, Polymorphism, Dynamic Method Binding, Inner Class Definitions

Unit No. 7 Packages, Interfaces, and Exception Handling

Defining a Package, Access Protection, Importing Packages, Interfaces Exception-Handling Fundamentals, Exception Types, Using Try & Catch, Java Built-In-Exceptions

Unit No. 8 Strings & Characters

String Constructors, String Comparing, String Methods, String Concatenating, String Classes, String Methods

Unit No. 9 GUI

Graphics Context, Graphic Methods, Color and Font Control, Drawing Shapes, Java 2d API, Java 2d Shapes, Swing Overview, Jlable, Event Handling Model, Jbutton, Jtextfield, Jradiobutton, Jcheckbox, Jlist, Multiple Selection List, Mouse Event Handling, Keyboard Event Handling, Layout Managers