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

It's an ideal test for pre-employment screening. A good PHP developer, who is working exclusively on an MySQL server database layer, needs to not only solve problems using PHP, but also to write and analyze SQL queries that are used for communication with the database and to use MySQL-specific features to interface efficiently with a database. 

This online test requires candidates to solve coding problems in PHP, answer multiple-choice questions about MySQL and write SQL queries that extract, combine, and manipulate data.

Sample Candidate Report

Sample Free Questions

Paginate Users

3min
  -  
Easy  
  -  
MCA

MySQL Pagination Public

Consider the following table:

CREATE TABLE users (
  id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  username VARCHAR(50) NOT NULL
);

The following query is used to paginate the table:

SELECT * FROM users ORDER BY username LIMIT 5 OFFSET 15;

Select all the true statements about this method of pagination.

(Select all acceptable answers.)

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. String comparisons should be case sensitive.

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

File Owners

10min
  -  
Easy  
  -  
CODE

PHP Language Public

Implement a groupByOwners function that:

  • Accepts an associative array containing the file owner name for each file name.
  • Returns an associative array containing an array of file names for each owner name, in any order.

For example, for associative array ["Input.txt" => "Randy", "Code.py" => "Stan", "Output.txt" => "Randy"] the groupByOwners function should return ["Randy" => ["Input.txt", "Output.txt"], "Stan" => ["Code.py"]].

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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, Retirees, Authors, Countries, Employee Manager, Merge Stock Index, Cheapest Product, Movies Live, ATM Locations, Department Report, Developers, Delete Orders, Restaurant Menu, Roads, Sales, Student Activities, Transactions, Projects, Youngest Child, Cookie, Chain Link, Crop Ratio, Hobbies, Category Tree, Programmer Teacher, Greeter, Read First Line, Chicken, Numbers to Text, Products, Array Sum, Filter, Paragraph, Last Key, Vectors, Word Count, Log Parser, Date Transform, Needle, Height, Username, View Count, Unique Numbers, Shipping, Segment, Tasks, Ingredients, Autocomplete, Dot Items, JSON Stock, Cargo Concat, Employee Sales, Employee Tree, Bank Branches, Hospital Patients, Menu Items, Ban Users, Array Search, Read Write Execute, SMS Messages
Skills
SQL Aggregation Subqueries Indexes Conditions Insertion Language Joins Union Constraints Database schema Bug fixing Delete Update Views PHP Data structures Arrays Iteration OOP Exceptions Strings Serialization Sorting Arithmetic Searching Stream Algorithmic thinking Performance tuning MySQL String functions JSON Window functions Common table expression Recursion
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