C Programming: Static vs Dynamic Memory Allocation
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Questions and Answers

What type of variables are typically assigned static memory allocation in C?

  • Dynamic variables
  • Local variables
  • Global variables (correct)
  • Constant variables
  • Where is static memory allocated in C?

  • Heap
  • Cache
  • Registers
  • Stack (correct)
  • What happens if you forget to deallocate memory that was allocated dynamically in C?

  • The program slows down but does not crash
  • The program crashes immediately
  • The program experiences a memory leak error (correct)
  • The program automatically deallocates the memory
  • What is a disadvantage of dynamic memory allocation in C?

    <p>It has a large overhead</p> Signup and view all the answers

    How is a function pointer different from a standard function call?

    <p>It allows you to call a function using its memory location</p> Signup and view all the answers

    In which scenario would you use function pointers?

    <p>When you want to plug one function into another</p> Signup and view all the answers

    What is one advantage of using function pointers?

    <p>Avoidance of temporary variables</p> Signup and view all the answers

    What advantage do function pointers offer for creating quicksort programs for different data types?

    <p>Avoids writing type-specific sort functions</p> Signup and view all the answers

    What is the purpose of the main function in the given program?

    <p>To iterate through an array and call the functions dbl, tple, and qdpl</p> Signup and view all the answers

    What is the purpose of the functions dbl, tple, and qdpl?

    <p>To perform mathematical operations on an integer and update its value</p> Signup and view all the answers

    What does the expression *n = *n * *n * *n do in the tple function?

    <p>It computes the cube of n and assigns it to n</p> Signup and view all the answers

    What is stored in the array p in line 8 of the program?

    <p>Addresses of functions dbl, tple, and qdpl</p> Signup and view all the answers

    Study Notes

    Memory Allocation in C

    • Static memory allocation is typically used for global variables, function parameters, and local variables that are declared as static.
    • Static memory is allocated in the data segment of the program.

    Dynamic Memory Allocation in C

    • Forgetting to deallocate memory that was allocated dynamically can lead to memory leaks.
    • Dynamic memory allocation is disadvantaged by increased overhead due to the need to manually manage memory.

    Function Pointers in C

    • A function pointer is different from a standard function call in that it allows for indirect function calls.
    • Function pointers are useful in scenarios where the function to be called is determined at runtime.
    • An advantage of function pointers is that they allow for more flexibility in code, enabling the creation of more modular and reusable code.
    • Function pointers are particularly useful in creating quicksort programs for different data types, as they enable the sorting function to be easily swapped out.

    Program Analysis

    • The main function is the entry point of the program and is responsible for initiating program execution.
    • The functions dbl, tple, and qdpl perform arithmetic operations on their input parameters.
    • The expression *n = *n * *n * *n in the tple function calculates the cube of the input value.
    • The array p in line 8 of the program stores function pointers to the dbl, tple, and qdpl functions.

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    Description

    Test your knowledge about the different types of memory allocation in C programming - static and dynamic. Learn about how static allocation is allocated to the Stack with a fixed size, while dynamic allocation allows for memory size adjustments and is stored in the Heap.

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