HTML/CSS, JavaScript, Java Algorithms, and SQL Online Test

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

It's an ideal test for pre-employment screening. A good full stack Java developer needs to be able to use a wide range of technologies, and solve 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 Java as the programming language.

Recommended Job Roles
Full-Stack Developer
Java Developer
JavaScript Developer
SQL Developer
Web Developer
Sample Candidate Report

Sample Free Questions

Ensure

3min
  -  
Easy  
  -  
CODE

JavaScript Error handling 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  
  -  
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

Avatar

7min
  -  
Easy  
  -  
CODE

HTML/CSS Borders Element size 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

Java Algorithmic thinking Recursion Tree 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

The premium question library contains our unique, hand-crafted questions. We offer a refund if you find any of them answered online.

Questions
Filter, Positive Numbers, Links, Function Wrapper, Double, Truthy Expressions, Roads, Table of Names, Word Count, Cards, New Folder, Max Sum, Paper Strip, Log Patch, Loading Bar, Ingredients, Unloading Trucks, Array Search, Reorder, Segment, Hobbies, A Tag, Ad, Addition, Article Style, ATM Locations, Authors, Autocomplete, Baby Names, Ban Users, Bank Branches, Blog, Bookmark, Breakfast Menu, Cheapest Product, Christmas Tree, Cities, Confirm, Countries, Date Transform, Department Report, Developers, Editor, Employee Manager, Veterinarian, Format Table, Height, Hide Button, Hospital Patients, Index Performance, Menu Items, Merge Stock Index, Movies, Movies Live, Projects, Rectangles, Restaurant Menu, Retirees, Sales, SMS Messages, Student Activities, Tasks, Transactions, Youngest Child, iframe, Internal Nodes, Keywords, Label Color, Link, Loading, Log Parser, Logo, Paragraph, Platformer, Post Comment, Product Rating, Products, Remove Repetitions, Row Appender, Scale Font Size, Screen Reader, Share Button, Shirts, Snapshot, TestDome Logo, Timesheet, Unique Product, Unique Numbers, Upload, Username, Vectors, Warehouse, Widgets, Moving Total, Welfare Organization, Manager Sales, Delete Orders, Validation, Timer, Book Sale, Friend, Screen, Data Entry, Email Tables, Student Max Score, Average Salary, Movie Genres, Student Rankings, Auto Show, Ice Cream Flavors, Poll
Skills
JavaScript Arrays Closures HTML/CSS CSS selectors Styling Exceptions DOM manipulation Event handling Language SQL Conditions Views Strings Java Algorithmic thinking Monkey patching HTML5 Subqueries Update Sorting Recursion Arithmetic Iteration Attribute manipulation Element spacing CSS advanced Element size Constraints Create table Database schema Select Create index Performance tuning Flexbox Positioning Alter table Elements and attributes Semantic tags Bookmarks Selectors Aggregation Fonts Dialog box Ordering Regex Insert Left join Bug fixing Queue Objects Asynchronous calls Indexes Union Group by Joins Hyperlink IFrame Tree Animation Serialization XML Data structures Linked list Content manipulation JSON StringBuilder Accessibility Forms CSS layout Tables HashMap HashSet SQL CASE CTE Delete Callback Graphs Classes ECMAScript 2015 Borders Inline styles Responsive design
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