Rust Programming Master Class from Beginner to Expert - Function Types

This tutorial introduces the concept of function pointers in Rust, explaining how they can be used to reference functions whose identity is not known at compile time. It covers defining Max and Min functions, using function pointers in the main program, and passing them as parameters to other functions. Practical examples are provided to reinforce learning, and the tutorial concludes with a brief mention of advanced uses such as communication with external APIs.

What is the primary purpose of a function pointer in Rust?

• To store data values

• To handle input/output operations

• To point to executable code

• To manage memory allocation

How does a function pointer differ from a regular data pointer?

• It is used for file operations

• It can only point to integers

• It points to a memory address

• It points to executable code

What is the output type of the Max function defined in the tutorial?

• U32

• I32

• F32

• I64

In the Rust program, how is the function pointer variable 'f' initially set?

• By assigning it to the Min function

• By assigning it to the Max function

• By assigning it to a constant value

• By assigning it to a string

What is the role of the function 'print_name' in the tutorial?

• To calculate the sum of two numbers

• To print a string passed to it

• To find the maximum of two numbers

• To sort an array

How does the 'prints_full_info' function utilize function pointers?

• By handling input/output operations

• By managing memory allocation

• By calling another function with additional inputs

• By storing data values

What does the 'do_twice' function do with its function pointer argument?

• Converts the function to a string

• Calls the function twice and adds the results

• Calls the function once

• Stores the function for later use

What is the expected output when the 'do_twice' function is called with the value 5?

• 10

• 22

• 11

• 12

What is a common use case for function pointers mentioned in the tutorial?

• Performing arithmetic operations

• Handling user input

• Communicating with external APIs

• Managing file systems

What topic is introduced as the next subject in the tutorial series?

• Error handling

• Concurrency

• Iterators

• Memory management