a 2-digit bcd da converter is a weighted resistor

Question

A 2-digit BCD D/A converter is a weighted resistor type with E_R = 1 Volt, with R = 1M? , R_f = 10K? . Find resolution in Percent and Volts.

Ans. Resolution = 1/2² = 0.25 volts.
Since the resolution is determined through no. of input bits of D/A converter;

For illustration two bit converter has 2²(4) possible output levels, thus its resolution is 1 part in 4
In percent this will be ¼ X 100 = 25%

In volts, this will be 0.25 volts.