Question

Select the method which returns the number of bytes from the array buffer:

(a) void WriteByte(byte value)

(b) int Write(byte[] buffer, int offset, int count)

(c) write()

(d) none of the mentioned

I got this question in semester exam.

Query is from Introduction of Stream Classes topic in division Console I/O Operations and Stream Classes of C#

Answer 1

The correct answer is:

(b) int Write(byte[] buffer, int offset, int count)

Explanation:

The method Write(byte[] buffer, int offset, int count) is part of many stream classes in C# and it writes a block of data from a byte array to the stream.

• The count parameter specifies the number of bytes to write, which effectively tells how many bytes are involved in the operation.
• The method returns the number of bytes actually written, which corresponds to the number of bytes from the array buffer that are written to the stream.

The other options do not return the number of bytes from the array buffer:

• (a) void WriteByte(byte value): This method writes a single byte to the stream, and it does not return any value.
• (c) write(): This is not a valid method in C# Stream classes by itself, as C# uses specific methods like Write() and WriteByte(), etc.

Thus, (b) is the correct choice.