Which of the following statements are true? (Select two answers)

exams PCAP-31-03 V1 PCAP-31-03 exam 0 Comments

Which of the following statements are true? (Select two answers)
A . open () is a function which returns an int that represents a physical file handle
B . the second open () argument is optional
C . instd, outstd, errstd are the names of pre-opened streams
D . if invoking open () fails, the value None is returned

Answer: A,B