State Whether the Following Statements Are True or False for the Features

Multiple Choice

State whether the following statements are True or False for the features of real time operating system.
i. fast process or thread switch
ii. ability to respond to external interrupts quickly.
iii. minimization of intervals during which interrupts are enabled.
iv. preemptive scheduling based on priority

A) i, ii and iii only
B) ii, iii and iv only
C) i, ii and iv only
D) All i, ii, iii and iv