ISRO2009-70

Question

A locked database file can be

• A. Accessed by only one user
• B. Modified by users with the correct password
• C. Used to hide sensitive information
• D. Updated by more than one user

Answer 1

File locking is a mechanism that restricts access to a computer file by allowing only one user or process access at any specific time.Otherwise there would be a Race Condition.

Ans : accessed by only one user

Answer 2

A) accessed by only one user.

https://en.wikipedia.org/wiki/File_locking

Answer 3

it should be A  locking is done to achieve concurrency control

b)file protection by using password is different concept than locking

c)sensitive information is  hidden through pvt or protected class method

d)before updation its lock has to be uncloked by the user who have locked it so no question of it too

Answer 4

File locking is a mechanism that restricts access to a computer file by allowing only one user or process access at any specific time. Systems implement locking to prevent the classic interceding update scenario, which is a typical example of race condition, by enforcing the serialization of update processes to any given file.