You are developing an application. The application includes a method named ReadFile that reads data
from a file.
The ReadFile() method must meet the following requirements:
-It must not make changes to the data file.
-It must allow other processes to access the data file.
-It must not throw an exception if the application attempts to open a data file that does not exist.
You need to implement the ReadFileQ method. Which code segment should you use?
A.
Option A
B.
Option B
C.
Option C
D.
Option D
E.
Option E
Explanation:
Allows you to Open or Create, but not change the file. The folder however can be changed.
A
var fs = File.Open(fileName, FileMode.OpenOrCreate, FileAccess.Read, FileShare.ReadWrite)
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0
A.
FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Read, FileShare.ReadWrite)
checks if the file exists – if it is, opens it, otherwise it creates new file and opens it.
2
0
… and FileAccess.Read parameter allows only to read data
… and FileShare.ReadWrite allows r/w access for other threads
0
0