Though many programmes can be opened at the same time, yet only ___

Q What is the first day of Lent
Q Why do I get 'Path not found' errors with FileSystemObject?
Q What is the role of http.sys in iis
Q For data transform using built in .net classes which talend component is used?
Q Explain lnformatica Architecture?
Q What is the english translation or the meaning of the word judo?
Q The monthly newsletter of which Indian organization is Trustmail?
Q What is the index called that normally reflects laminar flow in a tube?
Q Kamakhya temple is a famous tourist place of –
Q What does POPULATE_GROUP return when query suceeds ?
Q For the following program int i; i=0; repeat i=i+1; <====== PASCAL PROGRAM print i; until(i<10) end No. of times the loop is executed?