B3.1 Fundamentals of OOP for a single class questions for IB Computer Science

class ReservationList:
    def __init__(self):
        self.head = None

public class ReservationList {
    private Node head;

    public ReservationList() {
        head = null;
    }
}

class Node:
    def __init__(self, photo):
        self.photo = photo
        self.prev = None
        self.next = None

class Slideshow:
    def __init__(self):
        self.head = None
        self.tail = None

public class Node {
    String photo;
    Node prev;
    Node next;

    public Node(String photo) {
        this.photo = photo;
        this.prev = null;
        this.next = null;
    }
}

public class Slideshow {
    private Node head;
    private Node tail;
}

class HistoryStack:
    def __init__(self, capacity):
        self.pages = [None] * capacity
        self.top = -1

    def is_empty(self):
        return self.top == -1

    def is_full(self):
        return self.top == len(self.pages) - 1

    def push(self, url):
        # code missing

    def pop(self):
        # code missing

class HistoryStack {
    private String[] pages;
    private int top;

    public HistoryStack(int capacity) {
        pages = new String[capacity];
        top = -1;
    }

    public boolean isEmpty() { return top == -1; }

    public boolean isFull() { return top == pages.length - 1; }

    public boolean push(String url) {
        // code missing
    }

    public String pop() {
        // code missing
    }
}

class RideQueue:
    def __init__(self, capacity):
        self.data = [None] * capacity
        self.head = 0
        self.tail = 0
        self.count = 0

    def enqueue(self, rider):
        if self.count == len(self.data):
            return False
        self.data[self.tail] = rider
        self.tail = (self.tail + 1) % len(self.data)
        self.count = self.count + 1
        return True

    def dequeue(self):
        if self.count == 0:
            return None
        rider = self.data[self.head]
        self.head = (self.head + 1) % len(self.data)
        self.count = self.count - 1
        return rider

class RideQueue {
    private String[] data;
    private int head = 0;
    private int tail = 0;
    private int count = 0;

    public RideQueue(int capacity) { data = new String[capacity]; }

    public boolean enqueue(String rider) {
        if (count == data.length) {
            return false;
        }
        data[tail] = rider;
        tail = (tail + 1) % data.length;
        count = count + 1;
        return true;
    }

    public String dequeue() {
        if (count == 0) {
            return null;
        }
        String rider = data[head];
        head = (head + 1) % data.length;
        count = count - 1;
        return rider;
    }
}

class Book:
    def __init__(self, isbn, title, author):
        self.__isbn = isbn
        self.__title = title
        self.__author = author
        self.__on_loan = False

    def get_title(self):
        return self.__title

    def get_author(self):
        return self.__author

    def is_on_loan(self):
        return self.__on_loan

    def return_book(self):
        self.__on_loan = False

public class Book {
    private String isbn;
    private String title;
    private String author;
    private boolean onLoan;

    public Book(String isbn, String title, String author) {
        this.isbn = isbn;
        this.title = title;
        this.author = author;
        this.onLoan = false;
    }

    public String getTitle() { return title; }
    public String getAuthor() { return author; }
    public boolean isOnLoan() { return onLoan; }

    public void returnBook() {
        onLoan = false;
    }
}

class SoilSensor:
    def __init__(self, sensor_id, zone):
        self.__sensor_id = sensor_id
        self.__zone = zone
        self.__moisture = 0

    def record(self, value):
        self.__moisture = value

    def get_moisture(self):
        return self.__moisture

    def get_zone(self):
        return self.__zone

public class SoilSensor {
    private String sensorId;
    private String zone;
    private int moisture;

    public SoilSensor(String sensorId, String zone) {
        this.sensorId = sensorId;
        this.zone = zone;
        this.moisture = 0;
    }

    public void record(int value) { moisture = value; }
    public int getMoisture() { return moisture; }
    public String getZone() { return zone; }
}

s1 = SoilSensor("S1", "North")
s2 = SoilSensor("S2", "East")
s1.record(42)
s2.record(s1.get_moisture() - 5)
s1.record(30)
print(s1.get_moisture())
print(s2.get_moisture())
print(s2.get_zone())

SoilSensor s1 = new SoilSensor("S1", "North");
SoilSensor s2 = new SoilSensor("S2", "East");
s1.record(42);
s2.record(s1.getMoisture() - 5);
s1.record(30);
System.out.println(s1.getMoisture());
System.out.println(s2.getMoisture());
System.out.println(s2.getZone());