Rust MCQs with answers Page - 11

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 provides atomic reference counting in Rust?

  • (A) Rc<T>
  • (B) RefCell<T>
  • (C) Arc<T>
  • (D) Box<T>

A

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Q. Which keyword is used to declare constants in Rust?

  • (A) static
  • (B) const
  • (C) define
  • (D) final

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Q. Which trait is required for formatted output using `{}`?

  • (A) Debug
  • (B) Display
  • (C) Clone
  • (D) Copy

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Q. Which of these is a valid way to declare a mutable variable?

  • (A) let x = mut 5;
  • (B) mut let x = 5;
  • (C) let mut x = 5;
  • (D) let x mut = 5;

A

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Q. What does `.collect()` do on an iterator?

  • (A) Prints all items
  • (B) Sums all items
  • (C) Returns a new collection from iterator items
  • (D) Sorts all items

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Q. Which trait is used for operator overloading of `==`?

  • (A) Eq
  • (B) Ord
  • (C) PartialEq
  • (D) Compare

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Q. Which lifetime specifier denotes the entire program duration?

  • (A) 'self
  • (B) 'prog
  • (C) 'perm
  • (D) 'static

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Q. Which macro prints to standard error in Rust?

  • (A) print!
  • (B) eprint!
  • (C) println!
  • (D) stderr!

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Q. What is the default trait bound for generic types in Rust?

  • (A) Sized
  • (B) Copy
  • (C) Clone
  • (D) Display

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Q. Which standard library module deals with concurrency?

  • (A) std::cmp
  • (B) std::sync
  • (C) std::fmt
  • (D) std::ops

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