Testwissen für Java-Entwickler

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Author : Kai Spichale
Genre : Computers

Summary : Eine gute Testsuite mit hoher Testabdeckung verringert nicht nur die Fehlerdichte eines zu entwickelnden Systems, sondern bildet auch die Grundlage für Refactorings und Erweiterungen. Für die test- und verhaltensgetriebene Entwicklung sind Tests ein wichtiges Mittel zum Entwurf eines Systems. Im ersten Kapitel des shortcuts werden die Eigenschaften der test- und verhaltensgetriebenen Entwicklung vorgestellt. Es folgt eine Beschreibung von Best Practices für Unit Tests und Frameworks zur Ergebnisverifikation. Das zweite Kapitel widmet sich unterschiedlichen Teststilen, denn die in diesem Kapitel verwendeten Tests nutzen zur Verifikation ausschließlich den Zustand der Objekte, nicht aber deren Interaktionen bzw. Verhalten. Das dritte Kapitel fokussiert schließlich die Test- und Build-Automatisierung, um von den Unit- und Integrationstests im Rahmen einer kontinuierlichen Integration profitieren zu können.

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Author : Cristian Scutaru
Genre :

Summary : This book contains three original and high-quality practice tests with 40 questions each - with answers and explanations - to help you pass the new Couchbase Associate Java Developer exam.* Most questions are original, with added answers and references.* Other questions are adapted from quizzes, from the 8-hour long Couchbase Associate Java Developer Certification Course, with added answers.* Just like the real exam, each practice test has 40 questions, for 90 minutes, with a 80% passing score.* Domains or categories: General, Java SDK, Queries, and Data Modeling.* All questions closely emulate most from the actual exam, without duplicating them.* Unlike the real exam, you'll know right away what questions you missed, and what the correct answers are.* Detailed explanations with external references for any possible choice, in almost each practice test question.* Most questions are either single-choice or with multiple-selections.Same e-book as LIVE practice tests on Udemy: "Become a Couchbase Certified Java Developer: Practice Exams"

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Author : Angelika Langer
Genre : Computers

Summary : Was ein Memory Leak in Java ist und unter welchen Umständen solche Leaks auftreten, wurde im shortcut zum Thema Memory Leaks geklärt. Mit welchen Strategien und Werkzeugen man nach einem vermuteten Memory Leak suchen kann, zeigt dieser thematisch weiterführende shortcut. Er greift das Beispiel aus dem vorangegangenen shortcut wieder auf und befasst sich mit der proaktiven, dynamischen Analyse am "lebenden Objekt", d. h. während die Anwendung läuft. Des Weiteren wird die reaktive Post-mortem-Analyse, nachdem die Anwendung bereits (wegen Speichermangels) abgebrochen ist, veranschaulicht.

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Author : Dan Siroker
Genre : Business & Economics

Summary : How Your Business Can Use the Science That Helped Win the White House The average conversion rate—the rate at which visitors convert into customers—across the web is only 2%. That means it's likely that 98% of visitors to your website won't end up converting into customers. What's the solution? A/B testing. A/B testing is the simple idea of showing several different versions of a web page to live traffic, and then measuring the effect each version has on visitors. Using A/B testing, companies can improve the effectiveness of their marketing and user experience and, in doing so, can sometimes double or triple their conversion rates. Testing has been fundamental in driving the success of Google, Amazon, Netflix, and other top tech companies. Even Barack Obama and Mitt Romney had dedicated teams A/B testing their campaign websites during the 2012 Presidential race. In the past, marketing teams were unable to unleash the power of A/B testing because it required costly engineering and IT resources. Today, a new generation of technology that enables marketers to run A/B tests without depending on engineers is emerging and quickly becoming one of the most powerful tools for making data-driven decisions. Authors Dan Siroker and Pete Koomen are cofounders of Optimizely, the leading A/B testing platform used by more than 5,000 organizations across the world. A/B Testing: The Most Powerful Way to Turn Clicks Into Customers offers best practices and lessons learned from more than 300,000 experiments run by Optimizely customers. You'll learn: What to test How to choose the testing solution that's right for your organization How to assemble an A/B testing dream team How to create personalized experiences for every visitor And much more Marketers and web professionals will become obsolete if they don't embrace a data-driven approach to decision making. This book shows you how, no matter your technical expertise.

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Author : Graham Bath
Genre : Computers

Summary : Many books cover functional testing techniques, but relatively few also cover technical testing. The Software Test Engineer's Handbook-2nd Edition fills that gap. Authors Graham Bath and Judy McKay are core members of the ISTQB Working Party that created the new Advanced Level Syllabus-Test Analyst and Advanced Level Syllabus-Technical Test Analyst. These syllabi were released in 2012. This book presents functional and technical aspects of testing as a coherent whole, which benefits test analyst/engineers and test managers. It provides a solid preparation base for passing the exams for Advanced Test Analyst and Advanced Technical Test Analyst, with enough real-world examples to keep you intellectually invested. This book includes information that will help you become a highly skilled Advanced Test Analyst and Advanced Technical Test Analyst. You will be able to apply this information in the real world of tight schedules, restricted resources, and projects that do not proceed as planned.

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Author : Steven S Skiena
Genre : Computers

Summary : There are many distinct pleasures associated with computer programming. Craftsmanship has its quiet rewards, the satisfaction that comes from building a useful object and making it work. Excitement arrives with the flash of insight that cracks a previously intractable problem. The spiritual quest for elegance can turn the hacker into an artist. There are pleasures in parsimony, in squeezing the last drop of performance out of clever algorithms and tight coding. The games, puzzles, and challenges of problems from international programming competitions are a great way to experience these pleasures while improving your algorithmic and coding skills. This book contains over 100 problems that have appeared in previous programming contests, along with discussions of the theory and ideas necessary to attack them. Instant online grading for all of these problems is available from two WWW robot judging sites. Combining this book with a judge gives an exciting new way to challenge and improve your programming skills. This book can be used for self-study, for teaching innovative courses in algorithms and programming, and in training for international competition. The problems in this book have been selected from over 1,000 programming problems at the Universidad de Valladolid online judge. The judge has ruled on well over one million submissions from 27,000 registered users around the world to date. We have taken only the best of the best, the most fun, exciting, and interesting problems available.

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Author : Michael Margolis
Genre : Computers

Summary : Create your own robots, toys, remote controllers, alarms, detectors, and more with the Arduino device. This simple microcontroller has become popular for building a variety of objects that interact with the physical world. These recipes provide solutions for the most common problems and questions Arduino users have.