Rust MCQs with answers Page - 6

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. What does `.expect("msg")` do?

  • (A) Returns default value
  • (B) Prints an error message and returns None
  • (C) Returns value or panics with the given message
  • (D) Ignores the error silently

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Q. Which of the following is true about Rust's type system?

  • (A) Rust is dynamically typed
  • (B) Rust is weakly typed
  • (C) Rust is statically and strongly typed
  • (D) Rust has no types

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Q. What is the return type of a function that returns nothing?

  • (A) void
  • (B) ()
  • (C) null
  • (D) None

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Q. How is memory managed in Rust?

  • (A) Manually by programmer
  • (B) Through garbage collector
  • (C) Through ownership and borrowing
  • (D) Using memory pools

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Q. What does the `&` symbol indicate in Rust?

  • (A) Reference
  • (B) Dereference
  • (C) Mutable access
  • (D) Pointer arithmetic

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Q. What is the type of array `[1, 2, 3]` in Rust?

  • (A) Vec<i32>
  • (B) [i32]
  • (C) [i32; 3]
  • (D) array<i32>

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Q. What is the output of `Some(5).unwrap_or(10)`?

  • (A) 10
  • (B) Some(5)
  • (C) None
  • (D) 5

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Q. What keyword is used to define a trait in Rust?

  • (A) interface
  • (B) trait
  • (C) protocol
  • (D) abstract

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Q. Which of the following best describes a trait?

  • (A) A data structure
  • (B) An interface defining behavior
  • (C) A type alias
  • (D) A macro

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Q. How do you make a reference mutable in Rust?

  • (A) &mut var
  • (B) mut& var
  • (C) ref mut var
  • (D) var &mut

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