- http://www.gkseries.com/database-management-system/database-architecture-and-modeling/dbms-multiple-choice-questions-and-answers
- http://engineeringinterviewquestions.com/computer-science-engineering-cse-online-tests/
- http://www.eduzip.com
- http://mcqsets.com/dwnld/ebooks/Computer_Networking_Short_Questions_and_Answers.pdf
- https://www.indiabix.com/digital-electronics/questions-and-answers/
- https://electronicspost.com/multiple-choice-questions-and-answers-on-digital-electronics/
- http://www.gatestudy.com/multiple-choice-questions