Rust MCQs with answers Page - 17

Here, you will find a collection of MCQ questions on Rust. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Which type is used for dynamically sized arrays in Rust?

  • (A) Array
  • (B) Tuple
  • (C) Vec<T>
  • (D) List<T>

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Q. Which function adds an element to the end of a vector?

  • (A) push()
  • (B) append()
  • (C) insert()
  • (D) add()

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Q. What is the output type of `iter.map(|x| x + 1)`?

  • (A) Vector
  • (B) Iterator
  • (C) Array
  • (D) Result

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Q. What is the purpose of `Mutex<T>` in Rust?

  • (A) Shared immutable memory
  • (B) Thread synchronization
  • (C) Memory leak prevention
  • (D) Compile-time type checking

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Q. Which crate is commonly used for asynchronous runtime in Rust?

  • (A) rand
  • (B) tokio
  • (C) serde
  • (D) rayon

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Q. What does `Rc<T>` stand for?

  • (A) Remote counter
  • (B) Reference check
  • (C) Reference counted
  • (D) Runtime clone

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Q. What is the output of `Some(3).is_some()`?

  • (A) false
  • (B) true
  • (C) None
  • (D) Error

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Q. Which keyword is used to define a macro in Rust?

  • (A) macro
  • (B) macro_rules!
  • (C) define!
  • (D) rules!

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Q. What is the purpose of `Option<T>` in Rust?

  • (A) To handle errors
  • (B) To represent success or failure
  • (C) To represent a value that may or may not exist
  • (D) To represent concurrency

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Q. What does `Some(3).unwrap()` return?

  • (A) None
  • (B) 3
  • (C) Error
  • (D) true

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