Ruby Online Test
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Sign Up To Use This TestThe Ruby online test assesses candidates' knowledge of programming in the Ruby language.
It's an ideal test for pre-employment screening. A good Ruby developer should not only be able to solve problems using Ruby as the programming language but also be familiar with Ruby native data structures and language constructs.
This online test requires candidates to solve coding problems in Ruby as well as to find and fix bugs in a Ruby program.
Recommended Job Roles
Back-End Developer
Ruby Developer
Web Developer
Sample Candidate Report
Sample Free Questions
Merge Names
10min
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Easy
Easy
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CODE
Ruby
Arrays
Public
Ruby
Ruby is a dynamic, reflective, object-oriented, general-purpose programming language. Having a basic familiarity with the programming language used on the job is a prerequisite for quickly getting up to speed.
Arrays
An array is a container of a fixed number of objects of a similar type. It is a fundamental component of most programming languages.
Public
Public questions (free account) are common interview questions. They are great for practicing, or if you want to filter candidates using the classic problems.
Implement the unique_names method. When passed two arrays of names, it will return an array containing the names that appear in either or both arrays. The returned array should have no duplicates.
For example, calling unique_names(["Ava", "Emma", "Olivia"], ["Olivia", "Sophia", "Emma"]) should return an array containing Ava, Emma, Olivia, and Sophia in any order.
File Owners
15min
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Easy
Easy
-
CODE
Ruby
Hash
Public
Ruby
Ruby is a dynamic, reflective, object-oriented, general-purpose programming language. Having a basic familiarity with the programming language used on the job is a prerequisite for quickly getting up to speed.
Hash
A hash (or dictionary) is a data type composed of a collection of key-value pairs, where each possible key appears at most once in the collection. It is used when we need to access items by their keys.
Public
Public questions (free account) are common interview questions. They are great for practicing, or if you want to filter candidates using the classic problems.
Implement a group_by_owners function that:
- Accepts a hash containing the file owner name for each file name.
- Returns a hash containing an array of file names for each owner name, in any order.
For example, for hash {'Input.txt' => 'Randy', 'Code.py' => 'Stan', 'Output.txt' => 'Randy'} the group_by_owners function should return {'Randy' => ['Input.txt', 'Output.txt'], 'Stan' => ['Code.py']}.
Pipeline
10min
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Hard
Hard
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CODE
Ruby
Closures
Higher order function
Public
Ruby
Ruby is a dynamic, reflective, object-oriented, general-purpose programming language. Having a basic familiarity with the programming language used on the job is a prerequisite for quickly getting up to speed.
Closures
Closures are an important concept in any programming language in which functions are first-class citizens.
Higher order function
A higher order function is a function that takes another function as an argument, or returns another function. Developers often use them for writing reusable code.
Public
Public questions (free account) are common interview questions. They are great for practicing, or if you want to filter candidates using the classic problems.
As part of a data processing pipeline, complete the implementation of the pipeline method:
- The method should accept a variable number of functions, and it should return a new function that accepts one parameter arg.
- The returned function should call the first function in the pipeline with the parameter arg, and call the second function with the result of the first function.
- The returned function should continue calling each function in the pipeline in order, following the same pattern, and return the value from the last function.
For example, pipeline(-> (x) { x * 3 }, -> (x) { x + 1 }, -> (x) { x / 2 }) then calling the returned function with 3 should return 5.
Premium Questions
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Questions
Document Store, Greeter, Read First Line, Needle, Ranges, Log Patch, Shipping, Read Write Execute, Segment, Numbers to Text, Category Tree, Chain Link, Crop Ratio, Date Transform, Hobbies, Paragraph, Products, Username, Language TeacherSkills
RubyRuby
Ruby is a dynamic, reflective, object-oriented, general-purpose programming language. Having a basic familiarity with the programming language used on the job is a prerequisite for quickly getting up to speed.
Bug fixing
Everyone makes mistakes. A good programmer should be able to find and fix a bug in their or someone else's code.
Language
A programmer should use a language as a tool, always taking advantage of language-specific data types and built-in functions.
Exceptions
Exceptions exist in most modern programming languages, making it important for a programmer to understand them and know how to handle them.
Stream
A stream is a sequence of data elements made available over time. It is particularly useful for tasks that may benefit from being asynchronous, including tasks such as I/O processing or reading from a file, and as such is important for developers to understand.
Strings
The string data structure is used to represent text. It is one of the most commonly used data structures. Therefore, every programmer should be skilled at string manipulation.
Ranges
A range is an immutable sequence of numbers between the start and end. As a core data structure used for flow control in many programming languages, it's important for all developers to be familiar with.
Monkey patching
Monkey Patching is a method of either adding new or overriding existing functionality without the creation of a new type. As such it's an important tool for developers to be familiar with.
Arithmetic
Arithmetic is a fundamental branch of mathematics. An understanding of arithmetic concepts, and their application, is important for every candidate.
Hash
A hash (or dictionary) is a data type composed of a collection of key-value pairs, where each possible key appears at most once in the collection. It is used when we need to access items by their keys.
Linked list
A linked list is a linear collection of data elements where each element points to the next. It is a data structure consisting of a collection of nodes which together represent a sequence. It is usually used for advanced scenarios where we need fast access to the next element, or when we need to remove an element from anywhere in the collection.
Integer division
Integer division is division in which the fractional part (remainder) is discarded. Knowing this is important for optimal implementation of some algorithms and for avoiding common bugs.
Regex
A regular expression (regex) is a special text string for describing a search pattern. It is a common way for extracting data from text.
Arrays
An array is a container of a fixed number of objects of a similar type. It is a fundamental component of most programming languages.
Iteration
Iteration is the act of repeating a process, or cycling through a collection. Iteration is one of the fundamental flow control tools available to developers.
JSON
JSON is an open-standard format that uses human-readable text to transmit data objects consisting of attribute-value pairs. It's the most common data format used for asynchronous browser/server communication.
Serialization
Familiarity with data serialization to and from formats such as XML and JSON is important as it is commonly used for interprocess communication
Sorting
Every programmer should be familiar with data-sorting methods, as sorting is very common in data-analysis processes.
Inheritance
In object-oriented programming, inheritance is the mechanism of basing a class upon another class, retaining similar implementation. Inheritance allows programmers to reuse code and is a must know topic for every programmer who works with OOP languages.
OOP
Object-oriented programming is a paradigm based on encapsulating logic and data into objects, which may then contain fields and procedures. Many of the most widely used programming languages are based on OOP, making it a very important concept in modern programming.
Score Distribution
# of candidates
| 0-33% | |
|---|---|
| 34-66% | |
| 67-100% |
Score