4.1.1. Instruction: Procedure CALL/RETURN

Try these first

1. 1.

   What is a procedure in programming?

   Hint

   Think about how you can break down programming tasks.

2. 2.

   What does a stack do?

   Hint

   Remember the stack's last in, first out principle.

3. 3.

   What is the main purpose of using procedures in programming?

   • To encapsulate code
   • To slow down execution
   • To reduce readability

   Hint

   Think about the benefits of breaking code into smaller pieces.

4. 4.

   True or False: The Program Counter is responsible for keeping track of the current stack pointer.

   • True
   • False

   Hint

   Consider what each register is responsible for.

5. 5.

   Develop a simple C program that includes nested procedures and explain how the stack manages their contexts.

   Hint

   Use print statements to show the order of operations and stack management.

6. 6.

   In low-level assembly, design a sequence of instructions that showcases calling a procedure, performing operations, and returning to the main program. Explain the role of the Program Counter and stack.

   Hint

   Think about stack operations and how the PC changes during calls.