Rust MCQs with answers Page - 2

Dear candidates you will find MCQ questions of Rust here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Share your questions by clicking Add Question

📊 Rust
Q. What is the purpose of the 'cargo' tool in Rust?
  • (A) Memory management
  • (B) Code formatting
  • (C) Package management and building
  • (D) Debugging
💬 Discuss
✅ Correct Answer: (C) Package management and building

Explanation: 'cargo' is Rust's package manager and build system.

📊 Rust
Q. Which of the following is a valid way to print to the console in Rust?
  • (A) echo("Hello")
  • (B) print("Hello")
  • (C) println!("Hello")
  • (D) console.log("Hello")
💬 Discuss
✅ Correct Answer: (C) println!("Hello")

Explanation: Rust uses the macro 'println!' to print to the console.

📊 Rust
Q. What is the result of the following code?
Code: 
fn main() {
    let s = String::from("hello");
    let t = s;
    println!("{}", s);
}
  • (A) hello
  • (B) Compilation error
  • (C) Undefined behavior
  • (D) Nothing
💬 Discuss
✅ Correct Answer: (B) Compilation error

Explanation: Ownership of 's' is moved to 't', so 's' is no longer valid.

📊 Rust
Q. Which keyword is used to return a value from a function in Rust?
  • (A) return
  • (B) yield
  • (C) break
  • (D) exit
💬 Discuss
✅ Correct Answer: (A) return

Explanation: Rust uses 'return' to return values from functions.

📊 Rust
Q. What is the purpose of the 'Result' type in Rust?
  • (A) To store strings
  • (B) To handle errors
  • (C) To define structs
  • (D) To manage memory
💬 Discuss
✅ Correct Answer: (B) To handle errors

Explanation: 'Result' is used for error handling and represents success or failure.

📊 Rust
Q. Which of the following is a valid way to define a struct in Rust?
  • (A) struct MyStruct { name: String }
  • (B) class MyStruct { name: String }
  • (C) type MyStruct = { name: String }
  • (D) object MyStruct { name: String }
💬 Discuss
✅ Correct Answer: (A) struct MyStruct { name: String }

Explanation: Rust uses the 'struct' keyword to define custom data types.

📊 Rust
Q. What is the output of this code?
Code: 
fn main() {
    let x = vec![1, 2, 3];
    println!("{}", x[1]);
}
  • (A) 1
  • (B) 2
  • (C) 3
  • (D) Compilation error
💬 Discuss
✅ Correct Answer: (B) 2

Explanation: Indexing starts at 0, so x[1] is 2.

📊 Rust
Q. Which keyword is used to implement traits in Rust?
  • (A) trait
  • (B) impl
  • (C) interface
  • (D) define
💬 Discuss
✅ Correct Answer: (B) impl

Explanation: Rust uses 'impl' to implement traits for types.

📊 Rust
Q. What does the 'unwrap()' method do on a Result type?
  • (A) Returns the error
  • (B) Returns the value or panics
  • (C) Ignores the value
  • (D) Converts to Option
💬 Discuss
✅ Correct Answer: (B) Returns the value or panics

Explanation: 'unwrap()' returns the value if Ok, or panics if Err.

📊 Rust
Q. Which of the following is a macro in Rust?
  • (A) print
  • (B) println!
  • (C) format
  • (D) debug
💬 Discuss
✅ Correct Answer: (B) println!

Explanation: Macros in Rust are marked with a '!' like 'println!'.

Programming Categories

📱 Download Our App

Learn MCQs on the go with our easy-to-use Android app

Get it on Google Play