Binary File Handling Board Questions

  1. Consider a binary file, items.dat, containing records stored in the given format : [3 Marks] [2024]
    {item_id : [item_name, amount]}

    Write a function, Copy_new(), that copies all records whose amount is greater than 1000 from items.dat to new_items.dat .
    2. COMING SOON
  2. A binary file, EMP.DAT has the following structure : [3 Marks] [2024]
    [Emp_Id, Name, Salary]

    Where
    Emp_Id : Employee id
    Name : Employee Name
    Salary : Employee Salary

    Write a user defined function, disp_Detail(), that would read the contents of the file EMP.DAT and display the details of those employees whose salary is below 25000.
    3. coming soon
  3. Shreya is a programmer, who has recently been given a task to write a user defined function named write_bin() to create a binary file called cust_file.dat containing customer information - customer number (c_no), name (c_name), quantity(qty), price (price) and amount (amt) of each customer. The function accepts customer number, name, quantity and price. Thereafter, it displays the message ‘Quantity less than 10…. Cannot SAVE’, if the quantity entered is less than 10. Otherwise the function calculates amount as price * quantity and then writes the record in the form of a list into the binary file. [5 Marks][2023] 
    
import pickle
def write_bin( ):
	bin_file = ______________	#Statement 1
	while True:
		c_no = int(input(“enter customer number”))
		c_name = input(“enter customer name “)
		qty = int(input(“enter price”))
		price = int(input(“enter price”))
		if ________________		#Statement 2
			print(“Quantity less than 10…Cannot SAVE”)
		else:
			amt = price * qty
			c_detail = [c_no, c_name, qty, price, amt]
			______________	#Statement 3
			ans = input(“Do you wish to enter more records y/n”)
			if ans.lower( ) = = ‘n’:
				____________	#Statement 4
		________________________	#Statement 5
	______________________________	#Statement 6

    a) Write the correct statement to open a file “Cust_file.dat” for writing the data of the customer. [1]
b) Which statement should Shreyas fill in Statement 2 to check whether quantity is less than 10. [1]
c) Which statement should Shreyas fill in Statement 3 to write data to the binary file and in Statement 4 to stop further processing if the user does not wish to enter more records. [2]
OR(Option for part (c) only)
c)  What should Shreyas fill in Statement 5 to close the binary file named Cust_file.dat and in Statement 6 to call a function to write data in a binary file? [2]

    4. (i) Statement 1 : open("Cust_file.dat", "wb")
(ii) Statement 2 : qty<10
(iii) Statement 3 : pickle.dump(c_detail, bin_file)
Statement 4 : break
or
Statement 5 : bin_file.close()
Statement 6 : write_bin()