Rust MCQs with answers Page - 8

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 module provides the HashMap collection in Rust?

  • (A) std::collections
  • (B) std::maps
  • (C) std::hashmap
  • (D) std::dict

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Q. Which symbol is used to dereference a pointer in Rust?

  • (A) &
  • (B) #
  • (C) *
  • (D) @

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Q. Which trait allows using the `+` operator for custom types?

  • (A) Clone
  • (B) Add
  • (C) Plus
  • (D) Append

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Q. Which tool is used to run Rust tests?

  • (A) cargo check
  • (B) rustc test
  • (C) cargo test
  • (D) cargo run --test

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Q. Which of the following is true about the `Box<T>` type?

  • (A) Stores data on the stack
  • (B) Provides multiple ownership
  • (C) Allocates data on the heap
  • (D) Is a primitive type

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Q. What does `pub` keyword do in Rust?

  • (A) Marks a variable as public
  • (B) Makes the item accessible from outside its module
  • (C) Declares an external crate
  • (D) Indicates test code

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Q. Which macro is used to create a vector with repeated elements?

  • (A) vec![x; n]
  • (B) repeat_vec!(x, n)
  • (C) make_vec(x, n)
  • (D) vec_repeat!(x, n)

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Q. What does `unwrap_or_else()` accept as an argument?

  • (A) A direct value
  • (B) An Option
  • (C) A function or closure
  • (D) A macro

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Q. Which is a trait used to convert a value into a string?

  • (A) Clone
  • (B) Display
  • (C) From
  • (D) ToString

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Q. Which of these allows borrowing data mutably in Rust?

  • (A) &data
  • (B) &mut data
  • (C) mut &data
  • (D) *data

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