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
Web Developer
JavaScript Developer
SQL Developer

Sample Candidate Report


Sample Free Questions

Ensure

3min
  -  
Easy  
  -  
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
  -  
Easy  
  -  
CODE

SQL Aggregation Public

Given the following data definition, write a query that returns the number of students whose first name is John.

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

Semantics

7min
  -  
Easy  
  -  
CODE

HTML/CSS HTML5 Public

Update the website's HTML to make use of semantic elements so that:

  • The classless outer div element is replaced with a more appropriate element.
  • The divs with the image and caption classes are replaced with self-contained content elements.
  • The divs with the lorem-ipsum and description classes are replaced with elements, so that by default only the contents of the description element are shown. When the contents of the description element are clicked, the visibility of the rest of the lorem-ipsum element is toggled.

Binary Search Tree

15min
  -  
Easy  
  -  
CODE

Java 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
Upload, Link, Editor, Utilities, Filter, Stopwatch, Runner, Movies, Index Performance, Tasks, Poll, Rectangles, Blog, Document Store, Read Write Execute, Needle, Log Parser, Label Color, Height, Widgets, Driver Exam, Positive Numbers, Logo, Crop Ratio, Article Style, Programmer Teacher, Weighted Average, Retirees, Chicken, Share Button, Ad, Authors, Countries, Employee Manager, Merge Stock Index, Paragraph, Paragraph, Post Comment, Row Appender, Validation, Username, Keywords, Chain Link, Hobbies, Hobbies, Read First Line, Node, Cheapest Product, Links, Vectors, Username, Function Wrapper, Anchors, Shipping, Confirm, Movies Live, Double, Reorder, Hide Button, Timesheet, Racer, Truthy Expressions, Stack to List, Addition, Array Search, ATM Locations, Autocomplete, Bookmark, Christmas Tree, Department Report, Developers, iframe, Ingredients, Loading Bar, Delete Orders, Product Rating, Products, Restaurant Menu, Roads, Sales, Shirts, Snapshot, Snapshot, Student Activities, Table of Names, Transactions, Warehouse, Word Count, Projects, Menu Items, Product, Date Transform, Baby Names, Loading, Segment, Log Parser, Segment, Date Transform, Cards, Shining Star, Youngest Child, SMS Messages, Test Results, Format Table, Breakfast Menu, Cities, Screen Reader, Shelf, Scale Font Size, Bank Branches, Hospital Patients, New Folder, Screen, Snow Storm, Internal Nodes, Document Counter, Moving Total, Entry, Unique Numbers, Rare, Remove Repetitions, Max Sum, Unique Name, Friend, Movie Night, Platformer, Paper Strip, Log Patch, Stories, Ban Users, Train
Skills
HTML/CSS HTML attributes Language Java OOP JavaScript Arrays Closures Bug fixing Memory management SQL Aggregation Subqueries Indexes Joins Conditions HTML5 Semantic tags Arithmetic Strings Stream Serialization CSS selectors Positioning Exceptions Insertion Styling Union DOM manipulation Event handling Data structures Iteration Searching Tables Multithreading Algorithmic thinking CSS Advanced Recursion Constraints Database Schema Performance tuning Update Delete Sorting Views Refactoring Animation TDD Selectors Accessibility Test case design Classes ECMAScript 2015 Graphs Monkey Patching Dynamic programming
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