General Rust X
1.
How does Rust handle ownership when passing a variable to a function?
By transferring ownership using the move semantics
By automatically creating a reference to the variable
By relying on garbage collection
By cloning the variable
2.
What is the purpose of the `std::ops::DerefMut` trait in Rust?
To overload mutable dereference operations
To define a macro
To handle exceptions
To represent a numeric type
3.
How does Rust enforce immutability for variables by default?
By relying on garbage collection
By using the `mut` keyword
By using automatic reference counting
By not allowing mutation without the `mut` keyword
4.
What does the `std::cmp::PartialOrd` trait provide in Rust?
To implement the comparison operators for a type
To represent a numeric type
To handle exceptions
To declare a constant
5.
What is the purpose of the `std::fmt::Write` trait in Rust?
To declare a constant
To define a generic type
To represent a numeric type
To write formatted text efficiently
6.
How does Rust handle panics in tests using the `should_panic` attribute?
By expecting a specific panic message or pattern
By ignoring panics in tests
By automatically converting panics to test failures
By relying on garbage collection
7.
How does Rust handle integer overflow when using the `wrapping_add` method?
By wrapping around to the minimum value
By panicking
By ignoring the overflow
Returns the wrapped result without panicking
8.
How does Rust handle function parameters with variable numbers?
By using the `std::env::args` function
By relying on garbage collection
By using the `...` syntax
By using variadic arguments
9.
How does Rust handle concurrent programming with the `std::sync::Arc` type?
By providing atomic reference counting for shared ownership
By using automatic reference counting
By enforcing strict ownership rules
By relying on garbage collection
10.
What is the purpose of the `std::sync::Mutex` type in Rust?
To provide a lock for shared access in a multithreaded environment
To represent a numeric type
To handle file I/O operations
To declare a constant
11.
How does Rust handle generic programming with associated types in traits?
By using the `type` keyword in trait definitions
By relying on garbage collection
Through automatic lifetime inference
By using the `generic` keyword
12.
What is the purpose of the `std::time::SystemTime` type in Rust?
To represent a numeric type
To handle exceptions
To define a macro
To represent a point in time relative to the system clock
13.
How does Rust handle ownership of a value returned from a function?
By transferring ownership using move semantics
By creating a reference to the value
By relying on garbage collection
By cloning the value
14.
What is the purpose of the `std::cell::RefCell` type in Rust?
To declare a constant
To represent a numeric type
To handle file I/O operations
To provide interior mutability with borrowing checks at runtime
15.
How does Rust enforce lifetimes for references in function parameters?
By using explicit lifetime annotations
By relying on garbage collection
By enforcing strict ownership rules
By using the `lifetime` keyword
16.
What is the purpose of the `std::process::Command` type in Rust?
To represent a numeric type
To handle file I/O operations
To define a generic type
To run external commands and manage their output
17.
What is the purpose of the `std::mem::size_of` function in Rust?
To handle exceptions
To create a new module
To declare a constant
To determine the size of a type in bytes
18.
How does Rust handle ownership in the context of closures?
By inferring ownership based on the closure's environment
By using the `move` keyword to transfer ownership
By relying on garbage collection
By enforcing runtime checks
19.
What is the purpose of the `std::cmp::Eq` trait in Rust?
To represent a numeric type
To define a total ordering for values
To implement equality comparisons for a type
To handle exceptions
20.
What is the purpose of the `std::thread::spawn` function in Rust?
To create a new thread and run a function concurrently
To declare a constant
To represent a numeric type
To handle exceptions