COMPUTER SCIENCE ILLUMIN.-TEXT
COMPUTER SCIENCE ILLUMIN.-TEXT
7th Edition
ISBN: 9781284156010
Author: Dale
Publisher: Jones & Barlett
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Chapter 11, Problem 37E

a.

Program Plan Intro

File:

  • A group of interrelated data is called as a file.
  • Accessing a file either by using sequential access or by using direct access does not depend upon any physical medium such as disk or magnetic tape.
  • The file can be accessed in two ways. They are as follows,
    • Sequential access file
    • Direct access file

Explanation of Solution

b.

Implementations of direct access file on a magnetic tape:

  • If the information from the file is accessed directly by specifying the record number, then it is called direct access file.
  • The file can be accessed through any of the physical medium.
  • Implementation of direct access technique on a magnetic tape is as follows:
    • The records in the magnetic tape are addressed from first to last.
    • The magnetic tapes are updated with the counter for each read or write operation. So, it keeps track of the records that was read last by the magnetic tape.
    • If the user is granted to read the specific record on a magnetic tape, it first checks the address of the record...

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Add a new class Checking Account that inherits from the BankAccount class, and has a double instance variable overdraftLimit in addition to the variables inherited from the superclass. Create a constructor for the Checking Account class that takes in the account number, account holder name, initial balance, account type and overdraft limit as input, and uses the super keyword to call the constructor of the superclass, passing in the account number, account holder name and initial balance, account type. Re-write the withdraw() method in the CheckingAccount class so that it first checks if the withdrawal amount is less than the current balance plus the overdraft limit. If it is, the withdrawal is allowed and the balance is updated. If not, the method should return an error message "Insufficient funds". Create a new method displayOverdraft Limit() that returns the overdraft limit of the Checking Account. In the BankAccountTest class, create a new object of type Checking Account with…
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