Which of the following cannot be used to implement a timestamp
(a) System clock
(b) Logical counter
(c) External time counter
(d) None of the mentioned
(a) System clock
(b) Logical counter
(c) External time counter
(d) None of the mentioned
The correct answer is (c) External time counter
For explanation: An external time counter cannot be used to implement a timestamp. System clock and a logical counter can be used.