To how many colleges should I apply?
Working with your parents, your school counselor, college guides and websites, narrow your choices. Applying to multitudes of colleges is costly and time-consuming. Don’t apply to a college unless you are genuinely interested in attending and don’t apply to colleges that are unrealistic for you.
What is a Dangling pointer?
It is a pointer that doesn’t point to a valid memory location. Dangling pointers arise when an object is deleted or deallocated, without modifying the value of the pointer, so that the pointer still points to the memory location of the deallocated memory.
What is "Convection"? Give its day-to-day life example.
Convection is the process of transferring heat by movement of heated fluid such as water or air. In this process, the heated fluid expands, and gravity pulls the denser masses under them thus forcing them into motion. One good example is a draft of lamps and stoves.