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Q2. What does each subject actually teach?
Computer or commerce in Class 9 ICSE: what the two years contain
Computer Applications builds one skill, writing programs, step by step over two years. Commercial and Economic Applications cover several separate topics, each learnt as ideas and examples.
Computer Applications
Class 9: objects and classes, data types, operators, input, Math methods, if and switch, loops and nested loops.
Class 10: class as the basis of computation, user-defined methods and overloading, constructors, wrapper classes, encapsulation, single and double dimensional arrays with sorting and searching, and String handling.
Commercial Applications
Class 9: kinds of commercial organisation, the departments of a firm, business communication, environmental awareness, and the terms of accounting, without recording entries.
Class 10: markets and marketing, the 4 Ps, advertising and branding, selling, accounting principles, banking, cost, human resources, public relations and environmental issues.
Economic Applications
Class 10: demand and supply with schedules and curves, elasticity with simple numericals, land, labour, capital and the entrepreneur, market structures, the State, taxes and public enterprises, money, inflation and banking with the role of the RBI.
The same everyday question, asked two ways
Take a student saving a fixed amount each week for something they want to buy. Commercial Applications would ask which kind of bank account suits regular saving, and how it differs from a fixed deposit. Computer Applications asks the student to write a program that works out how many weeks it will take. Here is that program at a Class 9 level.
import java.util.Scanner;
class SavingsGoal {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Price of the item: ");
double price = sc.nextDouble();
System.out.print("Saved each week: ");
double perWeek = sc.nextDouble();
int weeks = 0;
double saved = 0;
while (saved < price) {
saved = saved + perWeek;
weeks++;
}
System.out.println("Weeks needed: " + weeks);
System.out.println("Left over: " + (saved - price));
}
}
Weeks needed: 9 Left over: 100.0 // input 600 and 200: Weeks needed: 3 Left over: 0.0
If a Class 8 or 9 student enjoys working out why the loop stops at week 9, and wants to change the program to print each week's total, Computer Applications will probably suit them. If they would rather discuss which account earns more interest, Commercial or Economic Applications may.
What a Class 9 student must carry into Class 10 Computer Applications is set out on Class 9 Java revision for Class 10.