multiple_choice
medium
Apply
umask
2 points
Question 2. CSCD240-E1-C
After umask 027, a newly-created regular file gets which octal?
Work the drill
Answer on paper or in a terminal before revealing the ideal answer.
Ideal answer
A: 640
Misconception bank
Each row below is a plausible wrong answer, the thinking that produces it, and the remedy that corrects the misconception. These are the foundation of the multiple-choice framing and the targeted feedback a student receives after answering.
B: 644
Misconception. Default umask of 022 produces 644; umask 027 is different.
Remedy. Compute: 666 - 027 masked = 640. File default permissions subtract umask.
C: 600
Misconception. That would be umask 077.
Remedy. Walk 666 - 027 = 640 bit by bit.
D: 750
Misconception. That is default dir perms under umask 027, not file.
Remedy. Dirs start at 777; files start at 666. Apply umask to each base.
Authority mappings
Hover any chip for the mapping justification; click to open the authority record.
DCWF roles:
IT-451 System Administrator
DCWF tasks:
T0136
KU topics:
CD-CSP-T16