This app has many useful topics and tests that will help you grow your knowledge.
Some of the topics covered here are:
CMOS CIRCUITS
TTL CIRCUITS
LOGIC CIRCUITS
FLIP-FLOPS
SHIFT RESISTERS
COUNTERS
SEMI CONDUCTOR MEMORIES
Also there are following knowledge enhancements with special contents:
Study Material
MCQ
Fill in the Blanks
True or False
Enjoy the app and gain knowledge!