Rust MCQs with answers Page - 22

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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Shyam Dubey • 3.70K Points
Extraordinary

Q. What happens if an Option is None and unwrap() is called?

  • (A) Returns 0
  • (B) Returns default
  • (C) Panics at runtime
  • (D) Ignores the value

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which keyword begins a loop that runs forever?

  • (A) while true
  • (B) loop
  • (C) for
  • (D) repeat

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Shyam Dubey • 3.70K Points
Extraordinary

Q. What is the effect of shadowing in Rust?

  • (A) Overwrites memory
  • (B) Disables the previous variable
  • (C) Reuses the variable name with a new value
  • (D) Deletes the variable

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which keyword is used to break out of a loop?

  • (A) exit
  • (B) stop
  • (C) return
  • (D) break

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Shyam Dubey • 3.70K Points
Extraordinary

Q. What is the purpose of continue in loops?

  • (A) Ends the loop
  • (B) Skips current iteration
  • (C) Repeats the loop
  • (D) Starts a new loop

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which keyword is used to declare a module in Rust?

  • (A) package
  • (B) mod
  • (C) crate
  • (D) namespace

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which method is used to check if a vector contains an element?

  • (A) has()
  • (B) includes()
  • (C) contains()
  • (D) in()

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which keyword is used to handle both Result and Option conveniently?

  • (A) unwrap
  • (B) ?
  • (C) match
  • (D) ok

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which type must be used when working with recursive types?

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

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Shyam Dubey • 3.70K Points
Extraordinary

Q. What does the clone() method do?

  • (A) Copies a reference
  • (B) Moves the value
  • (C) Creates a deep copy of the value
  • (D) Deletes the value

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