CBSE 2025, Compartment, Set 4

Question

Keshav is the IT Head in a hospital. He needs to manage the records of all the doctors in the hospital. For this, he wants to store the following information of each doctor in a file:
- `D_ID`: An integer to store Doctor ID.
- `D_Name`: A string to store doctor's name.
- `D_Dept`: A string to store the Department of the doctor. (Surgery, Radiology, etc.)
- `Experience`: An integer to store doctor's experience (in years)

For example, a doctor's information may be:
`[1256, "R. Gupta", "Cardiology", 15]`

As an applicant for the post of a Programmer, you have to answer the following questions in this context:
(I) Write one difference of storing this data in a binary file over a CSV file.
(II) Assume that the data is stored in a binary file, named `DOCTORS.DAT`, and each record is stored as a list. Write a function, in Python, to read and display all the records from the file `DOCTORS.DAT`.
(III) Write a function `addDoctor()`, in Python, which accepts a doctor's data from the user and writes it in the file `DOCTORS.DAT`.

Edvaya · Accepted Answer

The correct answer is Subjective. **(I) Difference between storing data in a Binary file over a CSV file:** Binary files are faster for processing and retain the inherent data types of variables (like lists and integers) without requiring explicit conversion. They are also more secure since they are not directly human-readable, whereas CSV files are stored as plain text. **(II) Function to read and display records from a Binary File:** ```python import pickle def read_doctors(): try: # Opening the file in "read binary" mode with open("DOCTORS.DAT", "rb") as file: while True: try: # Loading and printing the record record = pickle.load(file) print(record) except EOFError: break # End of file reached except FileNotFoundError: print("File DOCTORS.DAT not found.") ``` **(III) Function to add a doctor's data to the Binary File:** ```python import pickle def addDoctor(): # Opening the file in "append binary" mode with open("DOCTORS.DAT", "ab") as file: d_id = int(input("Enter Doctor ID: ")) d_name = input("Enter Doctor's Name: ") d_dept = input("Enter Department: ") experience = int(input("Enter Experience (in years): ")) # Creating a list format as requested record = [d_id, d_name, d_dept, experience] # Dumping the record into the binary file pickle.dump(record, file) print("Doctor's record added successfully.") ```

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Computer Science > Computational Thinking And Programming 2 > Data File Handling

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