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 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 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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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, Read Write Execute, 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, Bank Branches, Hospital Patients, Menu Items, Ban Users, SMS Messages, Array Search
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 Arithmetic Strings Serialization Sorting Searching Stream Algorithmic thinking Performance tuning Recursion
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