Java System Design and Implementation Exercises
Experiment 2: Movie Ticket Booking System
Design and implement an Object-Oriented Movie Ticket Booking System using appropriate class relationships (association, aggregation, composition) to manage movies, shows, seats, and bookings.
import java.util.*;
class Seat {
int seatNumber;
boolean isAvailable;
Seat(int num) {
seatNumber = num;
isAvailable = true;
}
}
class Show {
int showId;
ArrayList<Seat> seats = new ArrayList<>();
Show(int id, int Essential Python Programming Examples for Beginners
Unit Conversions
print("Select Conversion:")
print("1. Rupees to Dollar")
print("2. Celsius to Fahrenheit")
print("3. Inches to Feet")
choice = int(input("Enter your choice: "))
if choice == 1:
rupees = float(input("Enter amount in Rupees: "))
dollars = rupees / 83 # approx rate
print("Amount in Dollars =", dollars)
elif choice == 2:
c = float(input("Enter temperature in Celsius: "))
f = (c * 9/5) + 32
print("Temperature in Fahrenheit =", f)
elif choice == 3:
inches = Computer Security: Buffer Overflows and Encryption Fundamentals
Computer Security Fundamentals
Computer Security: The protection afforded to an automated information system to attain the applicable objectives of preserving the Integrity, Availability, and Confidentiality of information system resources, including hardware, software, firmware, information, data, and communication.
Buffer Overflow Vulnerabilities
Buffer overflow/overrun occurs when a process attempts to store data beyond the limits of a fixed-size buffer, overwriting adjacent memory locations. Buffers
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Java Super Keyword
Question: Explain the functionality of the super keyword in Java.
Answer: The super keyword refers to the immediate parent class object. It is used to:
- Access parent class data members hidden by child class data members.
- Call parent class methods when overridden in the child class.
- Invoke the parent class constructor using
super().
Throw vs Throws in Java
Question: Differentiate between throw and throws keywords in Java.
Answer: throw is used inside a method or block to explicitly throw
ARM LPC1768 Embedded C Programming and Architecture
ARM LPC1768 Embedded C Programming Examples
LED Blinking Program for ARM LPC1768
#include <LPC17xx.h>
void delay() {
for(int i=0; i<1000000; i++);
}
int main(void) {
LPC_GPIO2->FIODIR |= (1<<0); // Set P2.0 as output
while(1) {
LPC_GPIO2->FIOSET = (1<<0); // LED ON
delay();
LPC_GPIO2->FIOCLR = (1<<0); // LED OFF
delay();
}
}Switch Controlled LED Interfacing
#include <LPC17xx.h>
int main(void) {
LPC_GPIO2-Node.js and Express Backend Development Handbook
Express Framework Fundamentals
The Node.js web framework provides a structured pipeline from top to bottom:
- Routing system
- Middleware pipeline
- Response utilities
- Template integration (Pug, etc.)
The standard flow follows: Request → Middleware → Route → Response.
Middleware Pipeline
Middleware functions run before the final response. The function signature is (req, res, next). These functions can:
- Modify the req or res objects.
- Stop the request using
res.send(). - Pass control using
next().
Note: If neither
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