1.Answer the following 4*4=16

A)explain the methods of ad-hoc dft&discuss the scan design and its rules.

B)write a short notes on built in self test.

C)distinguish between compression and compaction.

D)explain in briefly about boundary scan standard and its benefits.

answer any three of the following 8*3=24

2.explain the overheads of scan design.

3.discuss in detail about economic case in bist.

4.explain in detail about bist pattern generation.

5.discuss in detail about boundary scan test instructions.

6.discuss the boundary scan description language