Rust MCQs with answers Page - 30

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 is a feature of trait objects?

  • (A) Compile-time dispatch
  • (B) Dynamic dispatch
  • (C) Type inference
  • (D) Stack allocation

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Q. Which type must be used to allow mutation through shared references?

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

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Q. Which method removes the last element of a vector?

  • (A) remove()
  • (B) delete()
  • (C) pop()
  • (D) truncate()

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Q. Which trait allows custom cleanup logic for a type?

  • (A) Destructor
  • (B) Drop
  • (C) Clear
  • (D) Free

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Q. Which syntax is correct for a function returning a Result?

  • (A) fn my_func() -> Result<String, i32>
  • (B) fn my_func() -> Option<String>
  • (C) fn my_func(String) -> Error
  • (D) fn my_func(Result)

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Q. Which tool is used to build and run tests in Rust?

  • (A) rustup
  • (B) cargo test
  • (C) rustc
  • (D) cargo check

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Q. Which macro is used to concatenate strings at compile time?

  • (A) format!
  • (B) concat!
  • (C) join!
  • (D) merge!

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Q. What is the default behavior of panic! in Rust?

  • (A) Logs error and halts program
  • (B) Returns error
  • (C) Restarts system
  • (D) Ignores error

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Q. Which method allows you to iterate over a vector and modify its elements?

  • (A) iter()
  • (B) into_iter()
  • (C) iter_mut()
  • (D) for_each()

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Q. Which operator is used for logical AND in Rust?

  • (A) &
  • (B) &&
  • (C) and
  • (D) ##

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