Efficient use of data structures

[ahmed]

Can anyone mention some applications which use the most efficient data structures?or some project sort of idea which i can code?

[BlaineSch]

There is not a title "Most Efficient Data Structure" that depends what your trying to accomplish. More than likely any program would use some type of data structure since they are so easy to use and readily available.

[WingedPanther]

If you read a few of my tutorials, you'll see some discussion about efficiency trade-offs. In particular, speed of execution vs memory use is a common trade-off.