For an ADC, match the following : if
List 1
A. Flash converter
B. Dual slope converter
C. Successive approximation Converter

List 2
1. requires a conversion time of the order of a few seconds
2. requires a digital- to- analog converter
3. minimizes the effect of power supply interference.
4. requires a very complex hardware.
5. It is a tracking A/D converter.

Two 2' s complement numbers having sign bits x and y added and the sign bit of the result is z. Then, the occurrence of overflow is indicated by the Boolean function.

An equivalent 2’s complement representation of the 2’s complement number 1101 is

The K-map for a Boolean function is shown in figure. The number of essential prime implicants for this function is