Rust MCQs with answers Page - 12

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 the `match` keyword do?

  • (A) Declares a test case
  • (B) Implements a loop
  • (C) Handles multiple patterns and branching logic
  • (D) Defines struct fields

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Q. Which of these types allows dynamic dispatch?

  • (A) Box<T>
  • (B) Box<dyn Trait>
  • (C) Option<T>
  • (D) Vec<T>

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Q. Which function is used to read user input in Rust?

  • (A) stdin.read()
  • (B) input()
  • (C) std::read()
  • (D) stdin().read_line()

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Q. Which iterator method applies a function and flattens the result?

  • (A) map()
  • (B) flat_map()
  • (C) filter()
  • (D) collect()

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Q. Which operator is used for borrowing in Rust?

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

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Q. What does the keyword `enum` define in Rust?

  • (A) An immutable list
  • (B) A function
  • (C) A data type with variants
  • (D) A macro

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Q. What does `panic!()` do?

  • (A) Compiles with warning
  • (B) Raises a runtime error and stops the program
  • (C) Prints to stderr only
  • (D) Continues silently

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Q. Which keyword is used to continue to the next loop iteration?

  • (A) next
  • (B) break
  • (C) skip
  • (D) continue

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Q. Which trait must be implemented for a type to be hashed in a HashMap?

  • (A) Hash
  • (B) Ord
  • (C) PartialOrd
  • (D) Clone

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Q. What is the purpose of the `derive` attribute in Rust?

  • (A) Defines a macro
  • (B) Automatically implements traits
  • (C) Runs a function
  • (D) Declares a constant

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