PHP and SQL Online Test

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

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

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

Recommended Job Roles
PHP Developer
SQL Developer
Web Developer
Sample Candidate Report

Sample Free Questions

Students

3min
  -  
Easy  
  -  
CODE

SQL Aggregation Select 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

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.

File Owners

10min
  -  
Easy  
  -  
CODE

PHP Associative arrays 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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Skills
SQL Conditions Views PHP Language Exceptions Arrays Strings Stream Arithmetic Subqueries Update Pass by reference Constraints Create table Database schema Select Create index Performance tuning Alter table Associative arrays Linked list Aggregation Session Ordering Bug fixing Integer division Regex Left join Iteration Indexes Union Group by Insert Joins Serialization XML JSON Sorting Inheritance OOP CTE Delete Algorithmic thinking SQL CASE Recursion Interfaces
Score Distribution
# of candidates
0-33%
34-66%
67-100%
Score
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