Scala (Coding): Intermediate Level Algorithms Test

Q: What are the main programming language tests?

Other key programming language tests available include: Python Online Test JavaScript Online Test Java Online Test Ruby Online Test

The Scala (Coding): Intermediate Level Algorithms Test evaluates a candidate's ability to solve algorithmic problems using Scala. The test includes questions on functional programming pattern matching collections and concurrency. It also assesses error handling recursion immutability and object-oriented programming in Scala through both MCQs and coding challenges.

Covered skills:

Functional Programming
Pattern Matching
Collections
Concurrency
Error Handling
Recursion
Immutability
Object Oriented Programming in Scala
Higher-Order Functions
Scala Syntax and Semantics

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About the Scala (Coding): Intermediate Level Algorithms Assessment Test

The Scala (Coding): Intermediate Level Algorithms 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 time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

Demonstrate proficiency in functional programming concepts and their application in Scala
Effectively utilize pattern matching for complex data structures and control flow
Efficiently manipulate and transform collections using Scala's powerful collection libraries
Implement concurrent programming techniques to handle parallel processing and improve performance
Apply proper error handling mechanisms to create robust and fault-tolerant Scala applications
Design and implement recursive algorithms to solve complex problems elegantly
Leverage immutability principles to write safer and more predictable code
Apply object-oriented programming concepts effectively within Scala's hybrid paradigm
Utilize higher-order functions to write more expressive and reusable code
Demonstrate a deep understanding of Scala's syntax and semantics for efficient coding

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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.

How we design questions

These are just a small sample from our library of 15,000+ questions. The actual questions on this Scala (Coding): Intermediate Level Algorithms Test will be non-googleable.

🧐 Question
Medium placeholder method	Solve
Review the following Scala code. “placeholder” is a placeholder function to be replaced with an actual Scala in-built method. What should ‘placeholder’ be so that the a, b, c in the code evaluate to true?
Medium Compilation Errors Compilation Errors Scala Syntax	Solve
Which lines in the following Scala code will lead to compilation errors?
Easy take and reduceLeft List String	Solve
What will the following Scala code print?

	🧐 Question	🔧 Skill
	Medium placeholder method	2 mins Scala	Solve
Review the following Scala code. “placeholder” is a placeholder function to be replaced with an actual Scala in-built method. What should ‘placeholder’ be so that the a, b, c in the code evaluate to true?
	Medium Compilation Errors Compilation Errors Scala Syntax	2 mins Scala	Solve
Which lines in the following Scala code will lead to compilation errors?
	Easy take and reduceLeft List String	2 mins Scala	Solve
What will the following Scala code print?

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	placeholder method	Scala	Medium	2 mins	Solve
Review the following Scala code. “placeholder” is a placeholder function to be replaced with an actual Scala in-built method. What should ‘placeholder’ be so that the a, b, c in the code evaluate to true?
	Compilation Errors Compilation Errors Scala Syntax	Scala	Medium	2 mins	Solve
Which lines in the following Scala code will lead to compilation errors?
	take and reduceLeft List String	Scala	Easy	2 mins	Solve
What will the following Scala code print?

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Why you should use Pre-employment Scala (Coding): Intermediate Level Algorithms Test?

The Scala (Coding): Intermediate Level Algorithms Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

Implementing functional programming concepts in Scala
Utilizing pattern matching for data extraction and control flow
Manipulating and transforming Scala collections efficiently
Writing concurrent programs using Scala's concurrency primitives
Handling exceptions and errors in Scala applications
Designing recursive algorithms for complex problem-solving
Applying immutability principles in Scala programming
Implementing object-oriented programming concepts in Scala
Creating and using higher-order functions effectively
Understanding and applying Scala syntax and semantics

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the Scala (Coding): Intermediate Level Algorithms Test?

Functional Programming: Functional programming is a paradigm that treats computation as the evaluation of mathematical functions and avoids changing state or mutable data. It's essential for writing robust, maintainable, and testable Scala code, which is fundamental in modern software development.

Pattern Matching: Pattern matching allows developers to check a value against a pattern, making it easier to decompose data structures and implement decision logic. In Scala, this feature streamlines handling varied data forms and fosters more readable and concise code.

Collections: Scala collections provide a unified framework to manipulate various types of data storage like lists, sets, and maps efficiently. Mastery of collections is vital for effective data manipulation and algorithm implementation in functional programming.

Concurrency: Concurrency in Scala, supported by features like Futures and Akka, enables programs to perform multiple tasks simultaneously. This skill ensures high performance and responsiveness in applications dealing with numerous operations or real-time data.

Error Handling: Error handling in Scala encompasses techniques to manage runtime errors gracefully using constructs like Try, Option, and Either. Proper error handling is crucial in developing reliable software that can recover from unexpected failures smoothly.

Recursion: Recursion is a method where the solution to a problem depends on solutions to smaller instances of the same problem. Leveraging recursion is pivotal in functional programming for implementing algorithms in a clean and efficient manner.

Immutability: Immutability refers to objects whose state cannot be modified after creation. This concept is vital in functional programming to avoid side effects, ensuring predictability and simplifying debugging.

Object Oriented Programming in Scala: Scala blends functional programming with object-oriented programming (OOP), allowing developers to create rich data abstractions. Understanding OOP in Scala is essential for leveraging the language's full power in designing modular, reusable code.

Higher-Order Functions: Higher-order functions are functions that take other functions as parameters or return them as results. They are fundamental in Scala for enabling code reuse and composability, which are key tenets of functional programming.

Scala Syntax and Semantics: Scala syntax and semantics define the structure and meaning of the code written in the language. Proficiency in Scala's syntactic and semantic rules is necessary to write correct, optimized, and idiomatic Scala code.

Full list of covered topics

The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for Scala (Coding): Intermediate Level Algorithms Test to be based on.

Functional Programming

Pure Functions

Immutability

Pattern Matching

Case Classes

Extractors

Collections

Sequences

Sets

Maps

Streams

Concurrency

Futures

Actors

Parallel Collections

Error Handling

Try

Either

Option

Recursion

Tail Recursion

Trampoline

Object-Oriented Programming

Traits

Mixins

Inheritance

Higher-Order Functions

Function Composition

Currying

Partial Functions

Lazy Evaluation

For Comprehensions

Implicit Conversions

Type Inference

Pattern Guards

Monads

Generics

Variance

Type Bounds

Closures

Partial Application

Foldable

Traversable

Applicative

Functor

Scalaz

Cats

Akka

Play Framework

SBT

What roles can I use the Scala (Coding): Intermediate Level Algorithms Test for?

Scala Developer
Backend Developer
Software Engineer
Data Engineer
Full Stack Developer
Machine Learning Engineer
Data Scientist
System Architect
DevOps Engineer
Big Data Engineer

How is the Scala (Coding): Intermediate Level Algorithms Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

Optimizing Scala code for performance and readability
Implementing advanced functional programming patterns
Designing and using custom pattern matching extractors
Working with parallel collections for improved performance
Implementing actor-based concurrency using Akka
Creating custom error handling mechanisms in Scala
Applying tail recursion optimization techniques
Implementing advanced OOP concepts like traits and mixins
Developing domain-specific languages (DSLs) in Scala
Integrating Scala with Java libraries and frameworks

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

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Have questions about the Scala (Coding): Intermediate Level Algorithms Hiring Test?

What is Scala (Coding): Intermediate Level Algorithms Test?

The Scala (Coding): Intermediate Level Algorithms Test evaluates candidates' understanding of Scala coding and intermediate-level algorithms. Recruiters and hiring managers use this test to assess skills such as Functional Programming, Pattern Matching, Collections, and more.

Can I combine the Scala (Coding): Intermediate Level Algorithms Test with Python questions?

Yes, recruiters can request a custom test that includes both Scala and Python questions. For example, you can explore our Python Online Test to see how we assess Python skills alongside Scala.

What skills are evaluated in the Scala (Coding): Intermediate Level Algorithms Test?

This test assesses various skills, including:

Functional Programming
Pattern Matching
Collections
Concurrency
Error Handling
Recursion
Immutability
OOP in Scala
Higher-Order Functions
Scala Syntax and Semantics

How to use the Scala (Coding): Intermediate Level Algorithms Test in my hiring process?

Use our assessment software as a pre-screening tool. Include a link to the assessment in your job post or invite candidates by email. Adaface helps you identify skilled candidates earlier in your hiring process.

What are the main programming language tests?

Other key programming language tests available include:

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. Here's a quick guide on how you can request a custom test.

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
Screen proctoring
Web proctoring
Webcam proctoring
Plagiarism detection
Secure browser
Copy paste protection

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.

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

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