The HTML/CSS, JavaScript, Python Algorithms, and SQL online test assesses candidates' knowledge across the whole Web stack. HTML, CSS, and JavaScript on the Web front-end, algorithmic-thinking skills in Python, and SQL on the back-end for data access.

It's an ideal test for pre-employment screening. A good full stack Python developer needs to be able to use a wide range of technologies, including solving back-end problems of a significant computational complexity.

This online test requires candidates to solve coding problems, find and fix bugs in multiple technologies, and analyze or design an algorithm using Python as the programming language.

Recommended Job Roles
Data Analyst
Full-Stack Developer
JavaScript Developer
Python Developer
SQL Developer
Web Developer
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Sample Free Questions

Ensure

3min
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Easy  
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CODE

JavaScript Language Public

Implement the ensure function so that it throws an error if called without arguments or the argument is undefined. Otherwise it should return the given value.

Students

3min
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Easy  
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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

Avatar

7min
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Easy  
  -  
CODE

HTML/CSS CSS selectors Styling Public

Every user on your website has an image avatar that is displayed when they post a comment. You want to style these images differently from other images on your site. Add a CSS class named avatar that fulfils the following requirements:

  1. The avatar's border is rounded, so that it appears as a circle.
  2. The avatar's width and height are both 150px.
  3. The avatar has a solid border, has a width of 2px, and be colored gray.

For example, the avatar in the template should look like:

Cat avatar

Binary Search Tree

15min
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Easy  
  -  
CODE

Python Algorithmic thinking Data structures Public

A three-node binary tree.Binary search tree (BST) is a binary tree where the value of each node is larger or equal to the values in all the nodes in that node's left subtree and is smaller than the values in all the nodes in that node's right subtree.

Write a function that, efficiently with respect to time used, checks if a given binary search tree contains a given value.

For example, for the following tree:

  • n1 (Value: 1, Left: null, Right: null)
  • n2 (Value: 2, Left: n1, Right: n3)
  • n3 (Value: 3, Left: null, Right: null)

Call to contains(n2, 3) should return True since a tree with root at n2 contains number 3.

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Premium Questions

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Questions
Link, Editor, Filter, Stopwatch, Movies, Index Performance, Poll, Rectangles, Blog, Document Store, Label Color, Positive Numbers, Logo, Article Style, Crop Ratio, Programmer Teacher, Greeter, Retirees, Share Button, Ad, Authors, Countries, Employee Manager, Merge Stock Index, Paragraph, Post Comment, Row Appender, Keywords, Chain Link, Hobbies, Cheapest Product, Links, Vectors, Username, Function Wrapper, Confirm, Movies Live, Double, Hide Button, Truthy Expressions, Addition, ATM Locations, Bookmark, Christmas Tree, Department Report, Developers, iframe, Delete Orders, Product Rating, Products, Restaurant Menu, Roads, Sales, Shirts, Snapshot, Student Activities, Table of Names, Transactions, Warehouse, Word Count, Projects, Baby Names, Loading, Log Parser, Date Transform, Cards, Youngest Child, Is Alpha, Format Table, Log Parser, Medical Record, Needle, Numbers to Text, Paragraph, Products, Username, Word Count, Date Transform, Breakfast Menu, Cities, Screen Reader, Scale Font Size, New Folder, Entry, Unique Numbers, Log Patch, Max Sum, Hobbies, Tuple Slice, Reward Points, Shipping, Timesheet, Segment, Tasks, Loading Bar, Ingredients, Autocomplete, Bank Branches, Hospital Patients, Menu Items, Ban Users, Array Search, Validation, Height, Read First Line, Read Write Execute, SMS Messages, Log Patch, Segment, Cargo Ship, Data Entry, Email Tables, Student Max Score, TestDome Logo, Ice Cream Flavors, A Tag, Widgets, Upload, Reorder, Moving Total, Category Tree, Rare, Screen
Skills
HTML/CSS HTML attributes JavaScript Arrays Closures SQL Aggregation Subqueries Indexes Conditions HTML5 Semantic tags Python Bug fixing Language CSS selectors OOP Insertion Positioning Styling Joins Union Strings DOM manipulation Event handling Data structures Iteration Arithmetic Searching Exceptions CSS advanced Constraints Database schema Delete Serialization Sorting Update Views Animation List comprehension Collections Stream Selectors Accessibility Algorithmic thinking Monkey patching List Tables Performance tuning Recursion CSS layout Forms CSS basics HTML Classes ECMAScript 2015
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