Question

What is the counter value at the beginning?

(a) one

(b) ten

(c) three

(d) zero

I had been asked this question in an interview for job.

This interesting question is from Dual Slope Integrating Type DVM topic in section Electronic Instruments of Electrical Measurements

Answer 1

The correct option is (d) zero

To explain I would say: In a dual slope integrating type DVM, the electronic counter is reset to 0 at the beginning of the measurement of voltage. Flip-flop output is also maintained at zero and is given to control logic.