Rust MCQs with answers Page - 31

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 trait should be implemented to allow a custom struct to be compared using < and >?

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

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Q. Which method returns an iterator that skips the first n elements?

  • (A) drop(n)
  • (B) skip(n)
  • (C) omit(n)
  • (D) take(n)

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Q. Which smart pointer automatically deallocates memory when out of scope?

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

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Q. Which crate provides serialization and deserialization in Rust?

  • (A) std::serialize
  • (B) serde
  • (C) ron
  • (D) dataio

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Q. What happens if a variable is moved and then used again?

  • (A) It works as expected
  • (B) It panics at runtime
  • (C) It causes a compile-time error
  • (D) It gets cloned

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Q. Which method appends one vector to another?

  • (A) merge()
  • (B) append()
  • (C) push_all()
  • (D) extend()

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Q. Which of the following types are considered scalar types in Rust?

  • (A) Tuple
  • (B) Array
  • (C) f64
  • (D) Vec

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Q. What does std::mem::replace do?

  • (A) Deletes a value
  • (B) Replaces value with another and returns the old
  • (C) Swaps memory addresses
  • (D) Copies memory

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Q. Which method removes all elements from a Vec?

  • (A) clear()
  • (B) truncate(0)
  • (C) remove_all()
  • (D) drop()

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Q. What is the result of 4 % 2 in Rust?

  • (A) 1
  • (B) 0
  • (C) 2
  • (D) 4

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