Assignment Overview

Objectives

Section A: Theory Questions (30 Marks)

Q1. What is programming? Name any two programming languages. (6 marks)

Q2. What is a variable? Give its syntax with an example. (6 marks)

int age = 15;
String name = "Ravi";
double marks = 85.5;
char grade = 'A';

Q3. Name any four data types in Java with examples. (6 marks)

Q4. What are arithmetic operators? List them with examples. (6 marks)

Q5. What is the assignment operator? Give an example. (6 marks)

int age = 15;      // Assigns 15 to age
double price = 99.99;  // Assigns 99.99 to price
String name = "Ravi";  // Assigns "Ravi" to name

int x = 5;
x += 3;   // Same as x = x + 3, now x = 8

Section B: Program Writing (50 Marks)

P1. Write a program to display "Hello, World!". (10 marks)

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

P2. Program to add two numbers entered by user. (10 marks)

import java.util.Scanner;

public class AddTwoNumbers {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter first number: ");
        int a = sc.nextInt();

        System.out.print("Enter second number: ");
        int b = sc.nextInt();

        int sum = a + b;
        System.out.println("Sum = " + sum);
    }
}

P3. Program to calculate area of a rectangle. (10 marks)

import java.util.Scanner;

public class RectangleArea {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter length: ");
        double length = sc.nextDouble();

        System.out.print("Enter breadth: ");
        double breadth = sc.nextDouble();

        double area = length * breadth;
        System.out.println("Area of Rectangle = " + area);
    }
}

P4. Program to convert temperature from Celsius to Fahrenheit. (10 marks)

import java.util.Scanner;

public class TemperatureConverter {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter temperature in Celsius: ");
        double celsius = sc.nextDouble();

        // Formula: F = (C * 9/5) + 32
        double fahrenheit = (celsius * 9.0 / 5.0) + 32;

        System.out.println("Temperature in Fahrenheit = " + fahrenheit);
    }
}

P5. Program to check if a person is eligible to vote (age >= 18). (10 marks)

import java.util.Scanner;

public class VotingEligibility {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter your age: ");
        int age = sc.nextInt();

        if (age >= 18) {
            System.out.println("You are eligible to vote!");
        } else {
            System.out.println("You are not eligible to vote.");
            System.out.println("You need " + (18 - age) + " more years.");
        }
    }
}

Section C: Output Prediction (20 Marks)

Q1. Predict the output. (4 marks)

int a = 10, b = 5;
System.out.println(a + b);

Q2. Predict the output. (4 marks)

int x = 10;
int y = 3;
System.out.println(x / y);

Q3. Predict the output. (4 marks)

int p = 15;
int q = 4;
System.out.println(p % q);

Q4. Predict the output. (4 marks)

String name = "Java";
System.out.println("Welcome to " + name);

Q5. Predict the output. (4 marks)

int m = 5;
m += 3;
System.out.println(m);

Output Prediction Summary

Submission Format

Evaluation Criteria (Total: 100 Marks)

Tips for Success

Common Mistakes to Avoid

How to Run Programs in BlueJ

Suggested Timeline (1 Week)

Did You Know?

Bonus Challenges (Optional)

Frequently Asked Questions

Q1. Can I use my own variable names?

Yes! Use meaningful names. Follow camelCase (like studentName).

Q2. What if my program has errors?

Read the error message carefully. Common issues: missing semicolons, wrong case, or missing braces.

Q3. Should I add comments?

Yes! Comments earn marks and show understanding. Use // for single-line comments.

Q4. How many test cases should I show?

At least 2-3 different test cases showing your program works for various inputs.

Q5. Can I use Notepad instead of BlueJ?

Yes, but BlueJ is easier for beginners because of its visual interface. Ask your teacher's preference.

Q6. What if I don't understand a question?

Ask your teacher or a classmate for clarification. Don't guess — understand first.

Q7. Should I write the class name same as file name?

YES! In Java, if you use public class, the class name MUST match the file name (case-sensitive).

Q8. Can I use online IDE like Replit?

Yes, but BlueJ is standard for ICSE Class 8. If BlueJ isn't available, ask your teacher.