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.

Recommended Job Roles

Ruby Developer
Back-End Developer
SQL Developer
Web Developer

Sample Candidate 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

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.

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.

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Movies, Index Performance, Tasks, Poll, Rectangles, Document Store, Read Write Execute, Needle, Category Tree, Products, Numbers to Text, Crop Ratio, Programmer Teacher, Greeter, Retirees, Authors, Countries, Employee Manager, Paragraph, Merge Stock Index, Username, Chain Link, Hobbies, Cheapest Product, Shipping, Segment, Movies Live, Ranges, Read First Line, ATM Locations, Autocomplete, Ban Users, Department Report, Developers, Ingredients, Delete Orders, Restaurant Menu, Roads, Sales, Student Activities, Transactions, Projects, Hospital Patients, Bank Branches, Menu Items, Date Transform, Log Patch, Youngest Child, SMS Messages
Skills
SQL Aggregation Subqueries Indexes Joins Conditions Ruby Bug fixing Language Arithmetic Strings Stream Data structures Serialization Sorting OOP Insertion Union Arrays Iteration Ranges Exceptions Constraints Database Schema Performance tuning Update Delete Views Monkey Patching
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