BCSL-056 is related to Network programming using Linux OS. Socket programming using C is 20 marks question. TCP server and Client OR UDP server and Client is the only two varlets comes in exam.
Lets have some tutorials on above topics
Key part is remembering structure definitions. Most of the program is static no logic to develop during exam.
2nd question is generally Linux OS commands. Previous questions papaers of BCSL -056 is best bet for both question types.