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About the test:

The Rust Online test uses scenario-based MCQs to evaluate candidates on their knowledge of Rust programming language, including syntax, data types, memory management, and concurrency. The test aims to evaluate a candidate's ability to write safe and efficient Rust code that meets specific requirements. The test includes a coding question to evaluate hands-on Rust programming skills.

Covered skills:

  • Standard Rust Operators and Syntax
  • Generic Structs
  • Enums and Pattern Matching
  • Smart Pointers
See all covered skills

9 reasons why
9 reasons why

Adaface Rust Online Test is the most accurate way to shortlist Rust Developers



Reason #1

Tests for on-the-job skills

The Rust Online test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves expensive engineering time by filtering out unqualified candidates.

The insights generated from this assessment can be used by recruiters and hiring managers to identify the best candidates for the role. Anti-cheating features enable you to be comfortable with conducting assessments online. The Rust developer test is ideal for helping recruiters identify which candidates have the technical skills to do well on the job.

The Rust Online Test helps you screen candidates. Interview only candidates with proven hands-on technical expertise in Rust development and programming. The idea behind this online Rust quiz is to help you assess on-the-job Rust concepts, coding and debugging skills with just one test.

Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface ->
Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

These are just a small sample from our library of 10,000+ questions. The actual questions on this Rust Online Test will be non-googleable.

🧐 Question

Easy

Join Handles
Concurrency
Solve
Review the following two Rust code snippets:
 image
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?
 image

Medium

Passed Function
Closures
Solve
Review the following code and pick the correct statements:
 image
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.

Easy

Registration Queue
Logic
Queues
Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.
For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.
⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
5
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10

Medium

Visitors Count
Strings
Logic
Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 
Example:

Input:
WWMMWWCCC

Expected Output: 
4W3C2M

Explanation: 
‘W’ has the highest count, then ‘C’, then ‘M’. 
⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.
🧐 Question🔧 Skill

Easy

Join Handles
Concurrency
2 mins
Rust
Solve

Medium

Mutable Sample
Structs
Variables and Mutability
2 mins
Rust
Solve

Medium

Passed Function
Closures
2 mins
Rust
Solve

Easy

Registration Queue
Logic
Queues
30 mins
Coding
Solve

Medium

Visitors Count
Strings
Logic
30 mins
Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Join Handles
Concurrency
Rust
Easy2 mins
Solve
Mutable Sample
Structs
Variables and Mutability
Rust
Medium2 mins
Solve
Passed Function
Closures
Rust
Medium2 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!


Brandon Lee, Head of People, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Rust Online Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the Rust Online Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & benchmarks

Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring


About The Rust Developer Role

Rust is a multi-paradigm system programming language with a strong emphasis on protection, especially secure concurrency. Rust is syntactically very similar to C++, but it is built to be more memory-friendly while still being fast.

Rust was originally developed at Mozilla Research by Graydon Hoare and contributed by Dave Herman, Brendan Eich, and others. Rust provides memory protection without the use of a garbage collector. Rust provides several advantages by avoiding the garbage collector, such as resource cleanup and no overhead of memory management. Rust prohibits using garbage collectors by using a system of ownership and borrowing.

This Rust Online Test for hiring candidates focuses on testing for on-the-job skills.

Typical Rust Developer responsibilities include:

  • Design, implement, test, and optimize complex code bases
  • Defining application objectives and functionality
  • Build and maintain new product features to satisfy client requirements
  • Work with cross-functional teams to craft custom solutions
  • Supporting users by developing documentation and assistance tools

What roles can I use the Rust Online Test for?

  • Rust Developer
  • Rust Programmer
  • Backend Developer
  • Web Developer
  • Rust on Rails Developer
  • Software Engineer - Rust on Rails
  • Rust Engineer

What topics are covered in the Rust Online Test?

Standard Rust Operators and Syntax
Enums and Pattern Matching
Multithreaded WebServer
Generic Structs
Smart Pointers
Reference Counting
Thread Pools and Worker
Ownership Concepts
Loops and Strings
OOPS concepts (Data Abstraction, Encapsulation, Inheritance, Polymorphism)
Generic Iterators
Concurrency
Threads
Managing Sessions
Structs and Methods
Result and Option Types
Error Handling
Lifetimes
Borrowing
Channels
Accessing Sessions
Modules
Traits
Cargo and Crates.io
Common Collections
Stack versus Heap - Box and the Deref Trait
Mutexes
I/O
Zero-cost abstractions
Memory safety
Type inference
C bindings
Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.


85%
reduction in screening time

FAQs

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

  • Non-googleable questions
  • IP proctoring
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser

Read more about the proctoring features.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

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