Pro lesson · Preview
Function Pointers & Callbacks
Store a function in a variable, pass behavior as an argument, and build dispatch tables: the mechanism behind qsort, HAL callbacks, and interrupt vector tables.
25 min read
This lesson is part of Pro
Upgrade to unlock the full lesson and the complete interview Q&A.
Unlock with Pro5 interview questions on this topic
Each one opens a full worked answer.
How do you declare a pointer to a function, and why is typedef recommended?What is a callback and why is it useful?How would you replace a large switch statement that maps command codes to handlers?What happens if you call a NULL or mismatched function pointer?How do interrupt vector tables relate to function pointers?
This is just the start
Sign up free to track your progress through this course, mark lessons complete, and work through the full interview Q&A.
More in C Programming
The C Compilation PipelinePointers & AddressesPointer Arithmetic & Arrays
Dynamic Memory: malloc & free
Stack vs Heap
Structs, Unions & Bitfields