Adaface Sample Rust Questions

Here are some sample Rust questions from our premium questions library (10273 non-googleable questions).

Rust Online Test

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🧐 Question
Easy Join Handles Concurrency	Solve
Review the following two Rust code snippets: Notice the handle.join().unwrap() line added in snippet two. Pick the correct statements: A: Snippet one prints 1 to 5 in the spawned thread and 1 to 3 in the main thread always. B: Snippet one prints 1 to 3 in the main thread but spawned thread might be closed before it prints all the numbers. C: Snippet two prints 1 to 5 in the spawned thread and 1 to 3 in the main thread always. D: Snippet two prints 1 to 3 in the main thread but the spawned thread might be closed before it prints all the numbers.
Medium Mutable Sample Structs Variables and Mutability	Solve
What does the following Rust code print?
Medium Passed Function Closures	Solve
Review the following code and pick the correct statements: A: The code prints 1223 B: The code prints 1111 C: The code prints 1234 D: The callPassedFunction(passedFunction) on line 7 makes a copy of passedFunction to become the argument of callPassedFunction. The copy gets executed and the x of copy becomes 2, but the original closure still holds a value of 1 for its captured x. E: The callPassedFunction(passedFunction) on line 7 makes a copy of passedFunction to become the argument of callPassedFunction. The copy gets executed and x of the copy and the origin both become 2.

	🧐 Question	🔧 Skill
	Easy Join Handles Concurrency	2 mins Rust	Solve
Review the following two Rust code snippets: Notice the handle.join().unwrap() line added in snippet two. Pick the correct statements: A: Snippet one prints 1 to 5 in the spawned thread and 1 to 3 in the main thread always. B: Snippet one prints 1 to 3 in the main thread but spawned thread might be closed before it prints all the numbers. C: Snippet two prints 1 to 5 in the spawned thread and 1 to 3 in the main thread always. D: Snippet two prints 1 to 3 in the main thread but the spawned thread might be closed before it prints all the numbers.
	Medium Mutable Sample Structs Variables and Mutability	2 mins Rust	Solve
What does the following Rust code print?
	Medium Passed Function Closures	2 mins Rust	Solve
Review the following code and pick the correct statements: A: The code prints 1223 B: The code prints 1111 C: The code prints 1234 D: The callPassedFunction(passedFunction) on line 7 makes a copy of passedFunction to become the argument of callPassedFunction. The copy gets executed and the x of copy becomes 2, but the original closure still holds a value of 1 for its captured x. E: The callPassedFunction(passedFunction) on line 7 makes a copy of passedFunction to become the argument of callPassedFunction. The copy gets executed and x of the copy and the origin both become 2.

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Join Handles Concurrency	Rust	Easy	2 mins	Solve
Review the following two Rust code snippets: Notice the handle.join().unwrap() line added in snippet two. Pick the correct statements: A: Snippet one prints 1 to 5 in the spawned thread and 1 to 3 in the main thread always. B: Snippet one prints 1 to 3 in the main thread but spawned thread might be closed before it prints all the numbers. C: Snippet two prints 1 to 5 in the spawned thread and 1 to 3 in the main thread always. D: Snippet two prints 1 to 3 in the main thread but the spawned thread might be closed before it prints all the numbers.
	Mutable Sample Structs Variables and Mutability	Rust	Medium	2 mins	Solve
What does the following Rust code print?
	Passed Function Closures	Rust	Medium	2 mins	Solve
Review the following code and pick the correct statements: A: The code prints 1223 B: The code prints 1111 C: The code prints 1234 D: The callPassedFunction(passedFunction) on line 7 makes a copy of passedFunction to become the argument of callPassedFunction. The copy gets executed and the x of copy becomes 2, but the original closure still holds a value of 1 for its captured x. E: The callPassedFunction(passedFunction) on line 7 makes a copy of passedFunction to become the argument of callPassedFunction. The copy gets executed and x of the copy and the origin both become 2.

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