Tell me what is the difference between the observers and callbacks in ruby on rails?
What is the strategy used to test new mobile app?
Why use a database over excel?
What is s4?
what are the applications of Linked Lists?
How to delete file in php?
What are the advantages of abap query tool?
Explain me scenario in which only ondestroy is called for an activity without onpause() and onstop()?
which gives Oracle R12 Financial training in delhi please give me answer its urgent?
Required amount of Steel bars, cement/ square feet for roofing of residential building upto 3rd floor.
What are the characteristics of negative feedback?
Does closing connection close resultset?
what is cvs (concurrent version system)?
Define eutrophication?
Explain middleware net dynamics?