File Handling and Input Output in C Sharp MCQ question and answer with solution

1

Which class in C# is used to read data from text files?

A) TextReader B) FileReader C) FileWriter D) StreamReader

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Answer & Solution

Answer: Option D

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2

What is the purpose of the using statement when working with files in C#?

A) To read data from files B) To write data to files C) To ensure proper disposal of resources D) To handle exceptions

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Answer & Solution

Answer: Option C

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3

In C#, which method is used to write data to a text file?

A) Write() B) WriteLine() C) WriteText() D) Append()

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Answer & Solution

Answer: Option B

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4

What is the correct way to open a file for writing in C#?

A) FileStream file = new FileStream("filename.txt", FileMode.Write); B) StreamWriter file = new StreamWriter("filename.txt"); C) File.OpenWrite("filename.txt"); D) None of the above

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Answer & Solution

Answer: Option B

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5

In C#, which class is used to manipulate directories and files?

A) System.IO.FileSystemInfo B) System.IO.FileInfo C) System.IO.DirectoryInfo D) System.IO.StreamInfo

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Answer: Option C

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6

What is the purpose of the File.Exists() method in C#?

A) To rename a file B) To delete a file C) To check if a file exists D) To create a new file

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Answer & Solution

Answer: Option C

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7

In C#, which method is used to read the entire contents of a file into a string?

A) ReadText() B) ReadString() C) ReadLines() D) ReadAllText()

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Answer & Solution

Answer: Option D

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8

What is the purpose of the File.ReadAllLines() method in C#?

A) To read all lines of text from a file into a string array B) To write all lines of text to a file C) To delete all lines of text from a file D) To append all lines of text to a file

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Answer & Solution

Answer: Option A

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9

In C#, which method is used to delete a file?

A) File.Clean() B) File.Erase() C) File.Remove() D) File.Delete()

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Answer & Solution

Answer: Option D

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10

Which class in C# provides methods for synchronous reading and writing operations on files?

A) FileStream B) StreamReader C) StreamWriter D) File

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Answer & Solution

Answer: Option C

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File Handling and Input Output in C Sharp MCQ question and answer with solution | C# Program MCQs