Which of the following command is used to open a file "c:\pat.txt" in read-mode only ?

1. fin = open("c:\pat.txt", "r")
2. fin = open("c:\\pat.txt", "r")
3. fin = open(file = "c:\pat.txt", "r+")
4. fin = open(file = "c:\\pat.txt", "r+")

Which of the following statements are true regarding the opening modes of a file ?

1. When you open a file for reading, if the file does not exist, an error occurs.
2. When you open a file for writing, if the file does not exist, an error occurs.
3. When you open a file for reading, if the file does not exist, the program will open an empty file.
4. When you open a file for writing, if the file does not exist, a new file is created.
5. When you open a file for writing, if the file exists, the existing file is overwritten with the new file.

Which of the following command is used to open a file "c:\pat.txt" for writing as well as reading in binary format only ?

1. fout = open("c:\pat.txt", "w")
2. fout = open("c:\\pat.txt", "wb")
3. fout = open("c:\pat.txt", "w+")
4. fout = open("c:\\pat.txt", "wb+")

Which of the following functions do you use to write data in the binary format ?

1. write()
2. output()
3. dump()
4. send()