⏱️ Time: 2 Hours
📊 Maximum Marks: 50

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📌 Instructions (Read Carefully):

• Attempt all questions.
• Write each program in a separate class/file.
• Follow proper OOP principles.
• Use Scanner class for input where required.
• Output must be clearly formatted and labeled.
• Add comments explaining your logic.

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🔹 Section A – Core Programming (30 Marks)

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Q1. Class, Constructor & Conditional Logic (10 Marks)

📘 Scenario: Parking Ticket System

A parking system calculates charges based on hours parked.

👉 Write a Java program with the following requirements:

1. Create a class ParkingTicket.
2. Declare instance variables:
   • vehicleNumber (String)
   • hoursParked (int)
   • ratePerHour (double)
3. Create a parameterized constructor:
   • Initialize all variables using this
4. Create a method calculateCharges():
   • If hours ≤ 2 → charge = hours × rate
   • If hours > 2 → extra ₹20 added as service fee
5. Create method displayDetails():
   • Display:
     • Vehicle number
     • Hours parked
     • Total charge
6. In the main() method:
   • Take input from user
   • Create object
   • Display result

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Q2. Inheritance + Overriding + Decision Logic (10 Marks)

📘 Scenario: Delivery Charge System

A logistics company charges delivery fees based on service type and distance.

👉 Write a Java program as follows:

1. Create base class DeliveryService:
   • Method calculateCharge(double distance)
   • Default message: Delivery charge not defined
2. Create subclasses:
   • LocalDelivery
   • IntercityDelivery
3. Override method:
   • LocalDelivery:
     • ₹10 per km
     • If distance > 50 km → add ₹100 extra
   • IntercityDelivery:
     • ₹20 per km
4. In the main() method:
   • Take distance as input
   • Create objects of both classes
   • Display charges
5. Output must show:
   • Delivery type
   • Distance
   • Final charge

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Q3. Encapsulation + Multi-Step Logic (10 Marks)

📘 Scenario: E-Wallet Transaction System

An e-wallet system handles balance and transactions securely.

👉 Write a Java program with the following requirements:

1. Create class EWallet.
2. Declare private variables:
   • walletId (int)
   • userName (String)
   • balance (double)
3. Provide getter and setter methods with validation:
   • Balance cannot be negative
4. Create methods:
   • addMoney(double amount)
   • transferMoney(double amount)
5. Add conditions:
   • Transfer allowed only if:
     • balance ≥ amount
     • minimum balance after transfer = ₹100
   • Otherwise display: Transaction not allowed
6. In the main() method:
   • Create object
   • Perform multiple operations
   • Display final balance

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🔹 Section B – Advanced OOP Concepts (20 Marks)

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Q4. Abstract Class with Logic (10 Marks)

📘 Scenario: Examination System

Different exams calculate grades differently.

👉 Write a Java program as follows:

1. Create an abstract classExam:
   • Abstract method calculateGrade(int marks)
2. Create subclasses:
   • SchoolExam
   • CompetitiveExam
3. Implement method:
   • SchoolExam:
     • ≥ 90 → A
     • ≥ 70 → B
     • else → C
   • CompetitiveExam:
     • ≥ 80 → Qualified
     • else → Not Qualified
4. In the main() method:
   • Take marks as input
   • Use abstract class reference
   • Display results for both exams

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Q5. Runtime Polymorphism + Conditional Output (10 Marks)

📘 Scenario: Ride Fare System

Different ride types calculate fare differently.

👉 Write a Java program:

1. Create class RideService:
   • Method calculateFare(double distance)
   • Default: return 0
2. Create subclasses:
   • MiniRide
   • LuxuryRide
3. Override method:
   • MiniRide → ₹8 per km
   • LuxuryRide → ₹15 per km + ₹50 base charge
4. In the main() method:
   • Take distance input
   • Use parent reference
   • Assign subclass objects
   • Display fare
5. Output must show:
   • Ride type
   • Distance
   • Total fare

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⭐ Bonus Question (Optional – 5 Marks)

Q6. Exception Handling + Multiple Conditions

📘 Scenario: Age Verification System

👉 Write a Java program to:

1. Ask user to enter age
2. Validate:
   • Age must be ≥ 18
3. If:
   • Age < 18 → throw exception "Underage"
   • Age < 0 → throw exception "Invalid age"
4. Use:
   • try-catch
   • Multiple conditions
5. Finally block should print: