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Java and SQL Online Test

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The Java and SQL online test assesses candidates' knowledge of programming in the Java language and ability to use SQL.

It's an ideal test for pre-employment screening. A good Java developer needs to be able not only to solve problems using Java but also write and analyze SQL queries to access a database.

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

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Free Sample Questions for Java and SQL Test

Our sample questions are free for companies to use on a trial plan. See more about our premium questions for paid plans below.

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.

Alert Service

10min
  -  
Easy  
  -  
CODE

Java Interfaces Inversion of control Refactoring Public

Refactor the AlertService and MapAlertDAO classes:

  • Create a new package-private interface, named AlertDAO, that contains the same methods as MapAlertDAO.
  • MapAlertDAO should implement the AlertDAO interface.
  • AlertService should have a constructor that accepts AlertDAO.
  • The raiseAlert and getAlertTime methods should use the object passed through the constructor.
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Premium Questions for Java and SQL Test

TestDome offers a premium questions library with 1000+ unique, hand-crafted questions whose answers can’t be found online. If you spot an answer somewhere online, we’ll give you a refund.

Covered Skills

Testing of these skills is covered in this pre-built test because they’re closely related. On our paid plan, you can easily create your own custom multi-skill tests.

Java Bug fixing Language Stream Strings Exceptions Arithmetic SQL Conditions Views Algorithmic thinking Arrays Subqueries Update Sorting Memory management Constraints Create table Database schema Select Create index Performance tuning Alter table Linked list Aggregation Ordering Integer division Regex OOP Refactoring Left join Queue HashMap Iteration Lists Indexes Union Group by Insert Joins Tree Serialization XML Recursion Data structures Accessibility levels Multithreading Synchronization StringBuilder ArrayList Complexity Stack Stream API Class modifiers Inheritance Delete Graphs SQL CASE Test case design Unit testing Dynamic programming Higher order function Interfaces HashSet TDD Right join Database normalization CTE Dynamic Proxy Classes Random Method overriding
Recommended Job Roles

These are the job roles that we recommend for the Java and SQL online test.

Back-End Developer
Java Developer
SQL Developer
Web Developer

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