CBSE File-Handling Questions (2019–2024) for Class 12 Computer Science(083)

 

CBSE File-Handling Questions (2019–2024)

• 2019

  • Count the number of words in a file that start with a vowel.

  • Count the number of uppercase letters in a text file.

• 2020

  • Open a text file in append mode and write a string into it.

  • Write a program to write a list of strings to a file, one per line.

  • Write a program to remove all lines containing the word "error" from a file.

  • Write a Python function to copy contents of one file to another.

• 2021

  • Write a function to count the number of lines starting with 'A' in a text file.

  • Read and display student data stored in a binary file.

  • Read a file and display only lines that contain more than 3 words.

  • Read a file and print lines that contain the word "network".

• 2022

  • Write a function to read a binary file and print all student names having marks > 75.

  • Write a function to search for a name in a text file and return True/False.

• 2023

  • Define a function to read a CSV file and display rows where marks > 90.

  • Write a program to create a binary file with roll no, name, and marks.

  • Write a function to read a binary file and print records with marks above a threshold.

  • Add a new row to an existing CSV file.

• 2024

  • Display contents of a CSV file containing book records.

  • Write a function to delete a record from a binary file based on student roll number.

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Year	Question
2019	What does seek() do? Give an example.
2020	Write a program to count vowels from a file named “poem.txt”.
2021	Explain the difference between read() and readline() with examples.
2022	Write a program to write and then read data from “student.txt”.

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2023

• readReverse(filename) — Read a text file and display its content in reverse order (character-wise).

• Significance of newline='' while opening a CSV file.

• countStudentsFailed(subject_name) — Count students who scored less than 33 in a given subject in a CSV file.

2024

• countWords(filepath) — Return total number of words in a file.

• Explain difference between file modes 'w' and 'a'.

• displayAboveMarks(min_marks) — Read a binary file student.dat and display students with marks above min_marks.

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Summary: Consolidated Question Themes by Year

Year	Key File-Handling Question Types
2019	Count uppercase letters; count words starting with vowels; use of seek()
2020	Append strings; write list to file; remove lines with a word; copy file; count vowels
2021	Count lines starting with a letter; read/display binary data; read() vs readline(); lines with >3 words; "network" filter
2022	Binary file filtering; search name in text; write/read student file
2023	CSV filtering and modification; reverse-read file; create binary student data file; marks threshold filtering
2024	CSV book records display; delete record by roll number; write vs append mode; count words in file