Rust

Question 1

What is Rust primarily used for?

Answer 1

Rust is used for systems programming, particularly where safety and concurrency are critical, such as in operating systems, game engines, and web browsers.

Question 2

How do you define a variable in Rust?

Answer 2

Use the let keyword to define a variable. For example, let x = 5; defines an immutable variable x with the value 5.

Question 3

What keyword is used to make a variable mutable in Rust?

Answer 3

Use the mut keyword to make a variable mutable. For example, let mut x = 5; allows x to be modified later.

Question 4

Explain ownership in Rust.

Answer 4

Ownership is a set of rules enforced at compile time that governs how memory and other resources are managed in Rust. It ensures memory safety and concurrency without needing a garbage collector.

Question 5

What is a borrow in Rust?

Answer 5

A borrow in Rust allows access to data without taking ownership of it, using either a reference (&) for shared access or a mutable reference (&mut) for exclusive access.

Question 6

Provide a basic example of a function in Rust.

Answer 6

A simple function in Rust:

rust fn add_two(x: i32) -> i32 { x + 2 }

This function add_two takes an integer x and returns x plus 2.

Question 7

How do you create a new vector in Rust?

Answer 7

Use Vec::new() or the vec! macro for initialization. For example, let v = vec![1, 2, 3]; initializes a vector with the values 1, 2, and 3.

Question 8

Describe pattern matching in Rust.

Answer 8

Pattern matching in Rust is used to branch execution paths based on the structure and values of data. It is typically implemented using the match statement.

Question 9

How do you handle errors in Rust?

Answer 9

Rust uses Result for recoverable errors and panic! for unrecoverable errors, allowing explicit handling of error conditions.

Question 10

What is a trait in Rust?

Answer 10

A trait in Rust defines functionality a type must provide. It is similar to an interface in other languages, enabling polymorphism.

Question 11

How do you declare a constant in Rust?

Answer 11

Constants are declared using the const keyword. For example, const MAX_POINTS: u32 = 100_000;.

Question 12

What is a slice in Rust and how is it used?

Answer 12

A slice is a reference to a contiguous sequence of elements in a collection rather than the whole collection. They are used to allow safe, efficient access to a portion of an array without copying.

Question 13

Describe how to use a struct in Rust.

Answer 13

Structs in Rust are used to create custom data types. Example:

rust struct User { name: String, age: u32, }

Question 14

What does the impl keyword do in Rust?

Answer 14

The impl keyword is used to define implementations on types, including methods associated with structs and enums.

Question 15

Give an example of enum usage in Rust.

Answer 15

Enums in Rust are used to define a type which can be one of several variants. Example:

rust enum Message { Quit, Move { x: i32, y: i32 }, Write(String), }

Question 16

What is cargo and how is it used in Rust?

Answer 16

Cargo is the Rust package manager and build system, used to manage Rust projects, dependencies, and to build and test projects.

Question 17

Explain how modules work in Rust.

Answer 17

Modules in Rust are used to organize code into namespaces and control the visibility (public/private) of items with mod and pub.

Question 18

What are Rust lifetimes?

Answer 18

Lifetimes are annotations in Rust that describe the scopes for which references are valid, ensuring safe memory access by preventing dangling references.

Question 19

How to perform error handling with Option in Rust?

Answer 19

Option is used in Rust for values that may be None (absence of value) or Some(value). It’s used to handle the possibility of missing values safely.

Question 20

Provide an example of using match with enums in Rust.

Answer 20

Example of using match with enums:

rust enum State { Working, Stopped, } let state = State::Working; match state { State::Working => println!("Working"), State::Stopped => println!("Stopped"), }

Question 21

Flashcard Question

Answer 21

Flashcard Answer

Question 22

Flashcard Question

Answer 22

Flashcard Answer

Question 23

Flashcard Question

Answer 23

Flashcard Answer

Question 24

Flashcard Question

Answer 24

Flashcard Answer

Question 25

Flashcard Question

Answer 25

Flashcard Answer

Question 26

Flashcard Question

Answer 26

Flashcard Answer

Question 27

Flashcard Question

Answer 27

Flashcard Answer

Question 28

Flashcard Question

Answer 28

Flashcard Answer

Question 29

Flashcard Question

Answer 29

Flashcard Answer

Question 30

Flashcard Question

Answer 30

Flashcard Answer

Question 31

Flashcard Question

Answer 31

Flashcard Answer

Question 32

Flashcard Question

Answer 32

Flashcard Answer

Question 33

Flashcard Question

Answer 33

Flashcard Answer

Question 34

Flashcard Question

Answer 34

Flashcard Answer

Question 35

Flashcard Question

Answer 35

Flashcard Answer

Question 36

Flashcard Question

Answer 36

Flashcard Answer

Question 37

Flashcard Question

Answer 37

Flashcard Answer

Question 38

Flashcard Question

Answer 38

Flashcard Answer

Question 39

Flashcard Question

Answer 39

Flashcard Answer

Question 40

Flashcard Question

Answer 40

Flashcard Answer

Question 41

Flashcard Question

Answer 41

Flashcard Answer

Question 42

Flashcard Question

Answer 42

Flashcard Answer

Question 43

Flashcard Question

Answer 43

Flashcard Answer

Question 44

Flashcard Question

Answer 44

Flashcard Answer

Question 45

Flashcard Question

Answer 45

Flashcard Answer

Question 46

Flashcard Question

Answer 46

Flashcard Answer

Question 47

Flashcard Question

Answer 47

Flashcard Answer

Question 48

Flashcard Question

Answer 48

Flashcard Answer

Question 49

Flashcard Question

Answer 49

Flashcard Answer

Question 50

Flashcard Question

Answer 50

Flashcard Answer

Question 51

Flashcard Question

Answer 51

Flashcard Answer

Question 52

Flashcard Question

Answer 52

Flashcard Answer

Question 53

Flashcard Question

Answer 53

Flashcard Answer

Question 54

Flashcard Question

Answer 54

Flashcard Answer

Question 55

Flashcard Question

Answer 55

Flashcard Answer

Question 56

Flashcard Question

Answer 56

Flashcard Answer

Question 57

Flashcard Question

Answer 57

Flashcard Answer

Question 58

Flashcard Question

Answer 58

Flashcard Answer

Question 59

Flashcard Question

Answer 59

Flashcard Answer

Question 60

Flashcard Question

Answer 60

Flashcard Answer

Question 61

Flashcard Question

Answer 61

Flashcard Answer

Question 62

Flashcard Question

Answer 62

Flashcard Answer

Question 63

Flashcard Question

Answer 63

Flashcard Answer

Question 64

Flashcard Question

Answer 64

Flashcard Answer

Question 65

Flashcard Question

Answer 65

Flashcard Answer

Question 66

Flashcard Question

Answer 66

Flashcard Answer

Question 67

Flashcard Question

Answer 67

Flashcard Answer

Question 68

Flashcard Question

Answer 68

Flashcard Answer

Question 69

Flashcard Question

Answer 69

Flashcard Answer

Question 70

Flashcard Question

Answer 70

Flashcard Answer

Question 71

Flashcard Question

Answer 71

Flashcard Answer

Question 72

Flashcard Question

Answer 72

Flashcard Answer

Question 73

Flashcard Question

Answer 73

Flashcard Answer

Question 74

Flashcard Question

Answer 74

Flashcard Answer

Question 75

Flashcard Question

Answer 75

Flashcard Answer

Question 76

Flashcard Question

Answer 76

Flashcard Answer

Question 77

Flashcard Question

Answer 77

Flashcard Answer

Question 78

Flashcard Question

Answer 78

Flashcard Answer

Question 79

Flashcard Question

Answer 79

Flashcard Answer

Question 80

Flashcard Question

Answer 80

Flashcard Answer

Question 81

Flashcard Question

Answer 81

Flashcard Answer

Question 82

Flashcard Question

Answer 82

Flashcard Answer

Question 83

Flashcard Question

Answer 83

Flashcard Answer

Question 84

Flashcard Question

Answer 84

Flashcard Answer

Question 85

Flashcard Question

Answer 85

Flashcard Answer

Question 86

Flashcard Question

Answer 86

Flashcard Answer

Question 87

Flashcard Question

Answer 87

Flashcard Answer

Question 88

Flashcard Question

Answer 88

Flashcard Answer

Question 89

Flashcard Question

Answer 89

Flashcard Answer

Question 90

Flashcard Question

Answer 90

Flashcard Answer

Question 91

Flashcard Question

Answer 91

Flashcard Answer

Question 92

Flashcard Question

Answer 92

Flashcard Answer

Question 93

Flashcard Question

Answer 93

Flashcard Answer

Question 94

Flashcard Question

Answer 94

Flashcard Answer

Question 95

Flashcard Question

Answer 95

Flashcard Answer

Question 96

Flashcard Question

Answer 96

Flashcard Answer

Question 97

Flashcard Question

Answer 97

Flashcard Answer

Question 98

Flashcard Question

Answer 98

Flashcard Answer

Question 99

Flashcard Question

Answer 99

Flashcard Answer

Question 100

Flashcard Question

Answer 100

Flashcard Answer