The testing methods like objective questions are useful to test student knowledege about factual information like dates, numbers, names and terms etc. while the short answers can give idea about the student knowledge about various steps or sub topics involved in solution to the problem.The essay questions enable students to express their view about a particulsr solution to the problem in a expressive manner while presenting it iwith rational approach based on the facts leading to solving the problem in a step wise manner to justify the student response..