Programming & Computer Science Answers

ACT3: Inheritance

INSTRUCTIONS

1. Choose your own category

2. Look for subcategories with similarities or shared attributes (atleast 3 subcategories)

3. Map inheritance on paper, list properties and methods

4. Define PHP classes

5. Inherit, extend, and override properties and methods

6. Create instances to test

Category Ideas: Animals, Clothing, Foods, Furniture, Musical Instruments.

Encapsulate the following Python code from Section 7.5 in a function named my_sqrt that takes a as a parameter, chooses a starting value for x, and returns an estimate of the square root of a.

while True:

y = (x + a/x) / 2.0

if y == x:

break

x = y

Write statements that perform the following one-dimensional-array operations (To test the items a-e below, create an integer array called numbers with 10 elements. Array should be first pre-initialized with random numbers from 1-100) or You can create a user defined Array taking input from user

For each array element.

a) Crete a method that will return sum of all the elements of an integer array.

b) Crete a method that will return the highest number in the array.  

c)Crete a method that will return the lowest number in array.

d) Display all the values of an array in column format.

e) Create a method that will reverse the array or create a method to get the Average of the array. 

Make a dictionary using linked list that searches names of people entered by the user using the First alphabet of the name

For example, if user enters names, Ali, abbas, bakar, rehan and then searches for names starting with 'a' then it displays the names

Abbas and Ali

Note:

No global declarations

Make use of class or struct

Test run your code in main

“If the height of a tree is reduced and balanced, then the searching time

also get reduced.” (True/ False) Justify. Construct a B-tree of order three with

the following set of elements where the elements are added to the tree one

after the other in the given sequence.23, 64, 48, 96, 101, 34, 55, 11, 22, 41,

89, 71, 78, 61, 83, 94, 8, 27, 35, 1.

arr1 = ["january","february","march","april","may","june"]

arr2 = ["july","august","septmber","october","november","december"]

combine two arrays

Write a program in Python programming language, which allows the user to input integer values for variables named lowerLimit and upperLimit. Based on the input values, the program should perform the following tasks:

• Calculate and display all odd numbers within the given range (lowerLimit to upperLimit).

• Calculate and display all even numbers within the given range (lowerLimit to upperLimit).

• Calculate and display the number of total even and odd numbers present within the range (lowerLimit to upperLimit).

*lowerLimit and upperLimit are included within range.

Write a program in Python programming language, which allows the user to input year value and based on the input value, the program should perform the following tasks:

• Check whether the value entered by the user is a positive integer.
• Generates an error massage in case of negative integer.
• Check whether the value entered by the user is in a correct format (Year should contain 4 digits).
• Calculate that the given year is a leap year or not.

Sample output for the wrong input:

Enter the year : -1995

wrong input !! year should be positive integer.

Enter the year : 19

wrong input !! worng input Enter the year in correct format i.e , 1980 or 2030

Sample output for the correct input:

Enter the year : 2020

2020 is a leap year

Enter the year : 2021

2021 is not a leap year

A processor method named upragedRAM(int) that receive the size of RAM to be upgraded as its parameter. This method will determine and return the price of RAM based on the following table:

RAM Size Price(RM)

8GB 98.00

16GB 299.00

3. Write main program :

a. Declare an array of objects named Laptops that store 10 laptop objects.

b. Ask user to enter all information required and store the data in the array above.

c. Calculate and display the total price of all Acer laptops

d. Display the brand of laptop thatt provides 4 USB ports

Given the definition of Laptop class as follows:

public class Laptop

{

  private String brand;  //HP, Acer, ASUS

  private double price;  //price per unit

  private int RAM;    // memory space in GigaByte(GB),e.g:2,4

  private int USBport;   //number of USB port e.g:2, 3, 4

  //normal constructor: public Laptop (String, double, int, int)

  //processor method: upradeRAM(int)

  //accessors: getBrand (), getPrice(), getRAM(), getUSB()

}

1. Write full class definition for the Laptop class.