Ruby and SQL Online Test
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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.
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Free Sample Questions for Ruby and SQL Test
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Merge Names
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.
Students
Given the following data definition, write a query that returns the number of students whose first name is John. String comparisons should be case sensitive.
TABLE students id INTEGER PRIMARY KEY, firstName VARCHAR(30) NOT NULL, lastName VARCHAR(30) NOT NULL
Enrollment
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.
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Premium Questions for Ruby and SQL Test
TestDome offers a premium questions library with 1000+ unique, hand-crafted questions whose answers can’t be found online. If you spot an answer somewhere online, we’ll give you a refund.
Question Names
These premium questions are included in this pre-built test and can be added to any multi-skill test. Please sign up for a paid plan to view the questions in detail.
Document Store, Greeter, Roads, Read First Line, Ranges, Log Patch, Shipping, Read Write Execute, Segment, Numbers to Text, ATM Locations, Authors, Autocomplete, Ban Users, Bank Branches, Category Tree, Chain Link, Cheapest Product, Countries, Developers, Employee Manager, Hobbies, Hospital Patients, Index Performance, Menu Items, Merge Stock Index, Movies, Movies Live, Projects, Rectangles, Restaurant Menu, Retirees, Sales, SMS Messages, Tasks, Transactions, Youngest Child, Paragraph, Products, Username, Language Teacher, Delete Orders, Average Salary, Auto Show, Poll, Department Report, Student Rankings, Student Max Score, Ingredients, Crop Ratio, Users and Accounts, Matching Clothes, Agents, River Discharge, Manager Sales, String Occurrence, Movie Genres, Student Activities, Welfare Organization, Date TransformCovered Skills
Testing of these skills is covered in this pre-built test because they’re closely related. On our paid plan, you can easily create your own custom multi-skill tests.
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