Ruby and SQL Online Test

TestDome skill assessments are used by more than 4,000 companies and 450,000 individual test takers.

Jobseekers: Get a Certificate

Companies: Try First, Pay Later

Used by:

The Ruby and SQL online test assesses candidates' knowledge of programming in the Ruby language as well as their ability to use SQL.

It's an ideal test for pre-employment screening. A good Ruby developer needs to not only solve problems using Ruby but also write and analyze SQL queries used for communication with the database.

This online test requires candidates to solve coding problems in Ruby and to write SQL queries that extract, combine, and manipulate data.

Recommended Job Roles

Back-End Developer

Ruby Developer

SQL Developer

Web Developer

Sample Candidate Report

Open Sample Report

Sample Free Questions

Students

3min

Easy

CODE

SQL Aggregation Public

Given the following data definition, write a query that returns the number of students whose first name is John.

TABLE students
   id INTEGER PRIMARY KEY,
   firstName VARCHAR(30) NOT NULL,
   lastName VARCHAR(30) NOT NULL

Solve Question

Enrollment

5min

Easy

CODE

SQL Conditions Update Public

A table containing the students enrolled in a yearly course has incorrect data in records with ids between 20 and 100 (inclusive).

TABLE enrollments
  id INTEGER NOT NULL PRIMARY KEY
  year INTEGER NOT NULL
  studentId INTEGER NOT NULL

Write a query that updates the field 'year' of every faulty record to 2015.

Solve Question

Palindrome

10min

Easy

CODE

Ruby Strings Public

A palindrome is a word that reads the same backward or forward.

Write a function that checks if a given word is a palindrome. Character case should be ignored.

For example, is_palindrome("Deleveled") should return true as character case should be ignored, resulting in "deleveled", which is a palindrome since it reads the same backward and forward.

Solve Question

Use Free Questions On a Trial Plan

Premium Questions

The premium question library contains our unique, hand-crafted questions. We offer a refund if you find any of them answered online.

Questions

Movies, Index Performance, Poll, Rectangles, Document Store, Category Tree, Crop Ratio, Programmer Teacher, Greeter, Retirees, Authors, Countries, Employee Manager, Merge Stock Index, Chain Link, Cheapest Product, Movies Live, ATM Locations, Department Report, Developers, Delete Orders, Restaurant Menu, Roads, Sales, Student Activities, Transactions, Projects, Youngest Child, SMS Messages, Read First Line, Read Write Execute, Needle, Products, Numbers to Text, Paragraph, Username, Hobbies, Ranges, Date Transform, Log Patch, Shipping, Segment, Tasks, Ingredients, Autocomplete, Bank Branches, Hospital Patients, Menu Items, Ban Users

Skills

SQL Aggregation Subqueries Indexes Conditions Ruby Bug fixing Language Data structures OOP Insertion Joins Union Constraints Database Schema Delete Update Views Exceptions Arithmetic Strings Stream Serialization Sorting Arrays Iteration Ranges Monkey Patching Performance tuning

Score Distribution

Pricing For Premium Questions

Fully Customizable Tests

Add questions from our question library.

Create your own questions.

Customize test duration, number of questions, passing score, web proctoring, and more.

Create Free Account

Private Concierge

Send us an email with an explanation of your testing needs and a list of candidates. We will create an appropriate test, invite your candidates, review their results, and send you a detailed report.

What Others Say

Simple, straight-forward technical testing

TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

Jan Opperman, Grindrod Bank

Very smooth, well supported, great for assessing candidates

Very Prompt and helpful support when needed, we were looking to work with a third party to write and set up new tests, TestDome was able to quickly set up and support a method to do this, allowing us to start testing candidates straight away.

George Offer, Guided Solutions

Easy to use and efficient for testing developers of different levels

It provides us an opportunity to set our own timing policy, to choose from variety of questions from different areas and with difficulty gradation. Also it is great that TestDome provides free of charge tests for candidates to prepare and check how online IDE works. And support is always ready to help:)

Alexandra Bulka, WorkFusion

On the TestDome Blog

Screening Applicants: The Good, the Bad and the Ugly

Since we’re all biased and we use incorrect proxies, why not just outsource hiring to experts or recruitment agencies? After all, they’ve been screening people for many years, so they must know how to do it right?

Not really. I was surprised to discover that many experts disagree with each other. Everybody praises their pet method and criticizes the others. Many of these methods look legitimate, but are based on...