Rust Programming Language Interview Questions and Answers

Last updated on Feb 07, 2024
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Rust Programming Language Interview Questions

Rust is a system programming language that works beamingly fast, prevents system or the platform from being crashed and eliminate the chances of data races. Rust is a platform that endorses you with both control and safety. In general, Rust Programming Language endorses you with some of the great features like a good control over allocation, the garbage collector is not much required, minimum runtime and close to metal.

Here are some the Rust Interview Questions and Answers for Experienced as well as for those who want to be in that line:

It's beamingly fast system is actually supported by it's compilation to an executable binary, LLVM Optimization Suite, Competitive with C/C++ and LLVM backend. It has undoubtedly a safe & strong abstraction and it guarantees ownership. It also projects great memory management feature that means all the variable have a scope that is valid for. Once it goes out of scope, it gets automatically deallocated. The latest available version is Version 1.31.1

Most Frequently Asked Rust Programming Language Interview Questions

Here in this article, we will be listing frequently asked Rust Programming Language Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q1. What are the advantages of using rust?

It is a choice of developers. To understand advantages, let’s compare Rust with the similar programming language. However, if you want to get into complete details about Rust programming language, we are also mentioning some of the Rust Programming Language Interview Questions and Answers for all. Go through it and feel like you learnt so many things today.

Rust Vs C++

Rust provides safety where C++ is not even capable enough to provide protection to its own abstraction and even the programmers to protect theirs. If any mistake is committed in C++, it shows arbitrary behaviour - technically, it means it has no meaning. Rust isolates you from that part and lets you concentrate you on the problem that you are trying to solve.

Rust Vs Java.

Automatic garbage collection provides rust with an edge over Java. Java is faster but even it can’t match with the speed of C in some domains.

Note it: Rust programming language can do it easily.

Rust Vs Python:

Good Design gives an edge to Rust over Python. Lambda can’t even hold any statement. In Rust, everything is defined in expressions, which means Language part composes in a much better way.

Q2. How is Rust’s Garbage Collection?

Rust uses a static garbage collector. It works on the principle of automatic memory management which means it automatically recycles the memory that will not be used again.

Q3. How do you get a command line argument in Rust?

The easiest way to use a command line argument in Rust is to put an iterator over the input arguments. Users can access the command line arguments by using functions such as
std::env::args_os or std::env::args

Q4. Could you describe some crucial features of Rust?

Move semantics, minimal runtime, efficient C bindings, trait-based generics, zero cost abstractions, pattern matching, type interface and zero cost abstractions.

Q5. Does Rust guarantee tail-call optimization?

No, Rust doesn’t guarantee TOC (Tail Call Optimization). Not even the standard library is required to compile the rust code. In these cases, the run time is similar to that of C programming language.

Q6. Does Rust include move constructors?

No, the values of all types in Rust are moved via memcpy. It moves everything that doesn’t have a copy constructor or doesn’t implement the copy trait.

Q7. How to write and run a Rust program?

Create a file name and the below-given code in it.
fn main() {
    println!("Hello, Rust!");

For macOS and Linux to run open terminal, put below command
$ rustc
$ ./main

Q8. What is Cargo in Rust?

It's a build system and package manager built for Rust users to manager projects in it. The Cargo system manages three things for users, building code, downloading the libraries, and rebuilding those libraries.

Q9. What’s Cargo.lock in Rust?

When a user runs cargo build command it automatically creates a file named as Cargo.lock to keep track of dependencies in the user application.

Q10. What string type should you use with Rust?

By far, quite a number of string types are available to be used with Rust, choosing one from these, CStr, str, Slice, CString, OsString, OsStr and Owned type, would be more preferable.

Development History

The history of Rust is basically categorized into 4 parts called EPOCHS:

The personal year (2006-2010)Graydon years (2010-2012) Typesystem years (2012-2014) → Release year → (2015-2016)
Graydon Hoare, with the contribution of with contributions from Brendan Eich, Dave Herman and others designed Rust at Mozilla Research.

Latest Version

Every 2-3 years, a new version of Rust Programming Language is produced.

  • In 2015, the Rust version 1.0 was released
  • In 2018, the Rust version 1.31 was released
Reviewed and verified by Umesh Singh
Umesh Singh

My name is Umesh Singh having 11+ experience in Node.JS, React JS, Angular JS, Next JS, PHP, Laravel, WordPress, MySQL, Oracle, JavaScript, HTML and CSS etc. I have worked on around 30+ projects. I lo...