Java Programming Fundamentals Syllabus

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Questions and Answers

How can you swap two integers in Java without using a third variable?

You can use arithmetic operations like a = a + b; b = a - b; a = a - b; to swap them.

What is the command to check if a number is a palindrome in Java?

You can reverse the number and check if it equals the original number.

How would you find prime numbers from an array of integers in Java?

You can iterate through the array and check if each number is divisible only by 1 and itself.

What methods would you implement in a Stack class to facilitate push and pop operations?

<p>You would implement <code>push(int value)</code> to add a value and <code>pop()</code> to remove and return the top value.</p> Signup and view all the answers

Explain how inheritance works using the Publisher and Book classes as an example.

<p>The Book class inherits attributes from the Publisher class, allowing it to share and extend functionality.</p> Signup and view all the answers

What is method overloading and how can it be achieved in Java?

<p>Method overloading occurs when multiple methods have the same name but differ in parameter types or numbers.</p> Signup and view all the answers

How can you demonstrate the use of 'super' and 'this' keywords in Java?

<p>'super' is used to access parent class methods or constructors, while 'this' refers to the current object instance.</p> Signup and view all the answers

What is the purpose of using final classes, abstract classes, and interfaces in Java?

<p>Final classes prevent inheritance, abstract classes provide a template for subclasses, and interfaces define method contracts.</p> Signup and view all the answers

What exception should you handle when dividing two integers in Java?

<p>You should handle <code>ArithmeticException</code> for division by zero and <code>NumberFormatException</code> for invalid input.</p> Signup and view all the answers

Which Java class can be used to manage a collection of objects like books?

<p>You can use the <code>ArrayList</code> class to manage a dynamic array of Book objects.</p> Signup and view all the answers

What are the primary differences between object-oriented programming and procedure-oriented programming?

<p>Object-oriented programming focuses on objects and classes, promoting encapsulation and inheritance, while procedure-oriented programming is centered around sequential logic and functions.</p> Signup and view all the answers

Explain the concept of encapsulation in Java.

<p>Encapsulation in Java is the bundling of data and methods that operate on that data within a single unit, usually a class, and restricting access to some of the object's components.</p> Signup and view all the answers

What role do constructors play in Java programming?

<p>Constructors are special methods invoked when an object is created, allowing for initialization of the object's attributes at the time of instantiation.</p> Signup and view all the answers

Describe the significance of type casting in Java.

<p>Type casting in Java allows a programmer to convert one data type into another, which is essential for data compatibility and manipulation in operations.</p> Signup and view all the answers

How does Java implement polymorphism?

<p>Java implements polymorphism primarily through method overloading and method overriding, allowing methods to behave differently based on the object invoking them.</p> Signup and view all the answers

What are the main control statements available in Java?

<p>Java provides various control statements including <code>if</code>, <code>switch</code>, <code>for</code>, <code>while</code>, and <code>do-while</code> for managing the flow of program execution.</p> Signup and view all the answers

What is the purpose of Java's switch statement?

<p>The <code>switch</code> statement in Java enables multi-way branching by allowing a variable to be tested against a list of values, facilitating cleaner code in decision-making scenarios.</p> Signup and view all the answers

Can you differentiate between continue and break statements in Java?

<p><code>continue</code> skips the current iteration and proceeds to the next one, while <code>break</code> exits the loop entirely.</p> Signup and view all the answers

What are literals in Java and how are they used?

<p>Literals in Java are fixed values that are directly represented in the code, such as numeric values, characters, or strings, and they serve as constant data points within the program.</p> Signup and view all the answers

Explain the significance of operator precedence in Java.

<p>Operator precedence in Java determines the order in which operations are performed in expressions, impacting the final result of calculations.</p> Signup and view all the answers

What exception will be thrown when attempting to access an invalid index of an array in Java?

<p>ArrayIndexOutOfBoundsException</p> Signup and view all the answers

In Java, which exception is thrown when a string cannot be parsed into a number?

<p>NumberFormatException</p> Signup and view all the answers

What method could you use to store the current date when writing a double value to a text file in a Java program?

<p>Use <code>java.util.Date</code> or <code>java.time.LocalDateTime</code>.</p> Signup and view all the answers

What is the typical method for converting an ArrayList to an array in Java?

<p>Use <code>toArray()</code> method.</p> Signup and view all the answers

In Java, what classes are commonly used to represent a calendar object and determine if a year is a leap year?

<p>GregorianCalendar and the method <code>isLeapYear()</code>.</p> Signup and view all the answers

How can regular expressions be utilized to extract integers and decimal values from a string in Java?

<p>By using the <code>Pattern</code> and <code>Matcher</code> classes from the <code>java.util.regex</code> package.</p> Signup and view all the answers

What interface in Java allows you to define the priority of threads?

<p>Runnable interface.</p> Signup and view all the answers

What Java component would you use to create a menu with items like New, Open, and Save?

<p>JMenu and JMenuBar.</p> Signup and view all the answers

What class would you use to implement a linked list structure in Java?

<p>LinkedList class.</p> Signup and view all the answers

What are two common problems addressed by multi-threading in banking applications?

<p>Withdrawal and Deposit.</p> Signup and view all the answers

What is the primary purpose of using the super keyword in Java?

<p><code>super</code> is used to call the superclass's methods or constructors.</p> Signup and view all the answers

How does variable shadowing occur in Java?

<p>Variable shadowing occurs when a subclass defines a variable with the same name as one in its superclass.</p> Signup and view all the answers

What is the purpose of the final keyword in the context of a class?

<p>The <code>final</code> keyword, when applied to a class, prevents the class from being subclassed.</p> Signup and view all the answers

Differentiate between an abstract class and an interface in Java.

<p>An abstract class can provide method implementations, while an interface only defines method signatures.</p> Signup and view all the answers

What are the main components of exception handling in Java?

<p>The main components include <code>try</code>, <code>catch</code>, <code>throw</code>, <code>throws</code>, and <code>finally</code>.</p> Signup and view all the answers

Explain the role of the InputStream and OutputStream classes in Java I/O.

<p>The <code>InputStream</code> class is used for reading data, while the <code>OutputStream</code> class is used for writing data.</p> Signup and view all the answers

What is the significance of using the Runnable interface in Java's multithreading?

<p>The <code>Runnable</code> interface allows the creation of thread tasks that can be executed by a thread.</p> Signup and view all the answers

Describe the AWT event delegation model.

<p>The AWT event delegation model is a system where events are generated by AWT components and sent to event listener objects.</p> Signup and view all the answers

What is the function of layout managers in Java GUI applications?

<p>Layout managers control the size and position of components within a container.</p> Signup and view all the answers

What is the difference between ArrayList and LinkedList in the Collection Framework?

<p><code>ArrayList</code> is backed by a dynamic array, while <code>LinkedList</code> is based on a doubly linked list.</p> Signup and view all the answers

Flashcards

Object-Oriented Programming (OOP)

A programming paradigm that emphasizes objects and their interactions.

Class

A blueprint for creating objects; defines data and behavior.

Object

An instance of a class; a concrete realization of the blueprint.

Encapsulation

The ability to hide internal details and expose only necessary information.

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Abstraction

The ability to represent a concept without revealing its underlying implementation.

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Inheritance

A way to create new classes based on existing ones, inheriting properties and behavior.

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Polymorphism

The ability of an object to take on different forms or behaviors based on context.

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Data Types

Data types define the kind of values a variable can hold, such as integers, floating-point numbers, or characters.

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Operators

Symbols that represent operations, such as +, -, *, /, and %.

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Control Statements

Instructions that control the flow of execution in a program.

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ArrayIndexOutOfBoundsException

An exception thrown when a program tries to access an array element outside of its valid index range. For example, trying to access the 5th element of a 4-element array.

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NumberFormatException

An exception thrown when a string cannot be converted into a number. For example, trying to convert the string "abc" to an integer.

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ArithmeticException

An exception thrown when an arithmetic operation results in an invalid outcome. For example, dividing by zero.

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File Handling

A mechanism for reading and writing data to files. It allows you to interact with files on your computer.

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ArrayList

A data structure that allows storing and managing a dynamic, ordered sequence of elements. It's very versatile and can grow or shrink as needed.

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Calendar Class

A class that provides methods for working with dates and times. It offers functions for getting the current date, time, manipulating time periods, and more.

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Regular Expression

A special pattern used for matching text strings. Regular expressions allow for defining patterns to search for specific sequences of characters.

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Threads

A mechanism for executing multiple tasks concurrently, allowing for improved performance and responsiveness. Threads share the same program, but run independently.

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Thread.sleep() method

A method that pauses the execution of a thread for a specified duration. Useful for controlling the speed and timing of operations.

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String

A fundamental data type in Java used to represent text sequences. It's a sequence of characters enclosed in double quotes, like "Hello World!".

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Classes in Java

Java programs are organized into classes, blueprints that define the structure and behavior of objects.

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Exception Handling

A mechanism in Java to handle and gracefully recover from errors that occur during program execution.

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Final Class

A type of class in Java that cannot be further extended or inherited. It's used to create classes meant to be final and unmodifiable.

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Abstract Class

A type of class in Java that cannot be instantiated directly. It's a blueprint for other classes to inherit from. It can contain abstract methods that must be implemented in the concrete subclasses.

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Interface

A collection of methods that define an interface. It specifies what a class should do, but not how it should be implemented. This promotes loose coupling and flexibility. Classes can implement multiple interfaces.

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Method Overloading

A method in Java that allows you to call another method of the same class with the same name but different parameter types.

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References (in Java)

In Java, references allow interaction between objects and the program itself. They act as pointers, holding the memory location of an object.

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Constructor (in Java)

A special method in Java that is called automatically when an object of the class is created. It's used to initialize the object's state.

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Sub Classing

A class that inherits properties and behaviors from another class, called the parent or superclass. It can extend functionality or specialize the inherited features.

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Try, Catch, Throw, Throws, Finally

Keywords used in Java to handle exceptional events that might disrupt the normal execution of a program. They help to ensure the program continues running despite unexpected situations.

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Throwable Class

A class that represents a standard way of handling exceptions. It provides methods for getting information about the exception and its cause.

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Object Class

A predefined class in Java, representing the root of the class hierarchy. All other classes in Java implicitly inherit from it.

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Package

A collection of related classes, interfaces, and other resources organized into a hierarchical structure. Packages help manage code and prevent name collisions.

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Access Control / Visibility

It refers to the process of making certain variables or methods accessible only within specific parts of the code. It helps maintain data integrity and control access to sensitive information.

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Using 'Super' Keyword

A mechanism in Java that allows you to access members (methods and variables) of the superclass within a subclass. It provides a bridge between the subclass and its parent.

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Study Notes

Java Programming Syllabus

  • Course Type: MCA, M.Sc. (IT)
  • Prerequisites: Knowledge of C and C++
  • Rationale: To learn fundamental Java programming concepts
  • Teaching Scheme (Weeks):
    • Lectures (Lect): 60 hours
    • Tutorials (Tut): 30 hours
    • Labs (Lab): 20 hours
  • Examination Scheme:
    • Internal (Internal): 20 marks
    • External (External): 80 marks
  • Total Credits: 4
  • Total Practical Hours: 20 Practical Hours

Java Fundamentals

  • Data Types, Operators, Statements:
    • Paradigms of programming (OOP, Procedure-oriented)
    • Object-Oriented Programming Concepts (OOP including: classes, objects, abstraction, encapsulation, inheritance, and polymorphism)
    • Java Environment and Structure
    • Data types, variables, literals, characters, arrays, symbolic constants
    • Type casting (conversions in Java)
    • Arithmetic, Assignment, Relational, Boolean, logical Operators
    • Control statements (selection statements, switch, nested switch, iteration, continue, return in Java)
  • Weightage: 20%
  • Teaching Hours: 8

Java OOP Concepts

  • Inheritance, Subclassing, Package:
    • Inheritance concepts
    • Defining sub-classes, method overriding, using super keyword
    • Variable shadowing
    • Method and variable binding
    • Using final keyword
    • Abstract classes and interfaces
    • Object class
    • Packages (creating a package and defining CLASSPATH)
    • Access specifiers (access control)
    • Access Visibility
  • Weightage: 20%
  • Teaching Hours: 8

Exceptions, Collections, IO, and Multi-threading

  • Exception Handling
    • Exception types (Throwable, checked, unchecked, user-defined)
    • Exception handling keywords (try, catch, throw, throws, finally)
    • Collection framework (Collections, List, Set, Enumeration, Iterator, ArrayList)
  • Input/Output (IO):
    • File class, directory creation, basic input/output, streams (byte and character)
    • Reading from/writing to console, files (PrintWriter)
  • Multi-threading:
    • Introduction to multi-threading
    • Thread class and execution
    • Runnable interface
    • ThreadGroup, Daemon threads, Thread states
  • Weightage (combined): 15%
  • Teaching Hours: 8 + 8 = 16 hrs

GUI Programming and Applets

  • GUI (Graphical User Interface):
    • AWT (Abstract Window Toolkit) and Swing
    • Fundamentals of applets
    • Applet class, applet life cycle
    • DocumentBase, CodeBase, AppletContext
    • AppletStub Interface & Working with Frames, Windows, Graphics, Colors, and Fonts
  • AWT Controls: Buttons, checkbox, choice, lists, text fields
  • Layout Managers: Flow, Grid, Border Layout
  • Event Handling: Event classes, event listener interfaces, Adapter classes
  • Weightage: 30%
  • Teaching Hours: 13

Continuous Evaluation

  • Continuous evaluation consists of assignments, seminars, presentations, quizzes, surprise tests (summative and MCQ type).

Java Programming Topics (Page 3 and 4)

  • Key practical topics include: writing programs for loops, arrays, classes, inheritance, method overloading, exception handling, file handling, collection frameworks, calendar class, regular expressions, multi-threading, AWT, Swing, and applets. Specific examples are provided concerning such tasks:

    • Swapping, data validation using exceptions handling, Factorial, palindrome check, prime number validation
    • Method Parameters: Method Overloading
    • File Handling file operations (read, write, create, delete files), working with text files, data conversion.
    • Collection framework: ArrayList, display content and sum, creating a class named Address and creating a Maillist with Linked List, Iterator operations.
    • Creating a Calendar, leap year identification
    • GUI Programming: AWT, Swing, applets, event handling, user interface design with menus, buttons, radio buttons, etc.
    • Multithreading: Handling threads and their attributes (name, priority), and sleep method for scheduling
  • Reference Books: provided.

  • Useful Links: provided.

  • Course Outcome: Upon completing the course, students will be proficient in implementing Java programming techniques.

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