To understand dimensional data modeling, let's define some of the terms commonly used in this type of modeling:
Junk dimension is the way to solve this problem. In a junk dimension, we combine these indicator fields into a single dimension. This way, we'll only need to build a single dimension table, and the number of fields in the fact table, as well as the size of the fact table, can be decreased. The content in the junk dimension table is the combination of all possible values of the individual indicator fields.
In a data warehouse or a data mart, there are three areas of where data integrity needs to be enforced:
Star Schemas :
The star schema (also called star-join schema, data cube, or multi-dimensional schema) is the simplest style of data warehouse schema. The star schema consists of one or more fact tables referencing any number of dimension tables
In addition to conformed dimensions, you need conformed facts. Conforming a fact really amounts to standardizing the definitions of terms across individual marts. Often, different divisions or departments use the same term in different ways. Does “revenue” refer to “gross revenue” or “adjusted revenue”? Does “units shipped” refer to cases of items or individual items?
Make certain your design team develops, early on, a uniform enterprise taxonomy—and enforce it.
The typical ETL-based data warehouse uses staging, integration, and access layers to house its key functions. The staging layer or staging database stores raw data extracted from each of the disparate source data systems. The integration layer integrates the disparate data sets by transforming the data from the staging layer often storing this transformed data in an operational data store (ODS) database. The integrated data is then moved to yet another database, often called the data warehouse database, where the data is arranged into hierarchical groups often called dimensions and into facts and aggregate facts. The combination of facts and dimensions is sometimes called a star schema. The access layer helps users retrieve data.
How to Locate Element using UIAutomatorViewer?
1) The very first step before locating any element on your device is to first connect your device with your computer. I am expecting that you are coming to this chapter by following the complete tutorial on Setting up Appium with Eclipse.
What is PdaNet+
PdaNet is a free app (available for iPhone, Android, BlackBerry, and other mobile platforms) that you can use to turn your smartphone into a modem for your laptop or you can say that it enables tethering. But we do not need this software to enable tethering but this application will help us to connect our computer with the mobile devices using USB cables. To use the PdaNetapp for connecting your Android phone, you need to install the app on both your Android phone and also install the software on the Windows computer (Windows XP, Vista, Windows 7 — 32-bit and 64-bit versions available) or Mac OS.
There are two types of environmental variables:
- User Variables : Specific to a particular Windows user account
- System variables : For all the user of the machine
Most of the times these variables are usually defined and initialized automatically when you install the system or other applications like JDK but there are situations in which the user must manually define them. You can also do a check on this that the system variables for Java is automatically set or not.
Jenkins
is a software that allows continuous integration. Jenkins will be
installed on a server where the central build will take place. The following
flowchart demonstrates a very simple workflow of how Jenkins works.
Along
with Jenkins, sometimes, one might also see the association of Hudson.
Hudson is a very popular open-source Java-based continuous integration tool
developed by Sun Microsystems which was later acquired by Oracle. After the
acquisition of Sun by Oracle, a fork was created from the Hudson source code,
which brought about the introduction of Jenkins.
What is a Mobile Application?
Mobile
applications are applications created by companies, developers to do a specific
task(for a specific use). These applications are called as mobile native
applications or mobile web based applications. These applications either run on
mobile devices (native apps) or on websites (mobile web apps).
Mobile Application Types:
- What is Mobile Native Apps: The applications that reside on the phone or that can be downloaded from OEM stores.
- What is Mobile Web Based Apps: The applications that can be accessed through Browsers.
Appium is an open source tool which is useful
in testing of Native Apps,Hybrid Apps and Mobile Web Apps.By using Appium you
can automate Android ,IOS and Mobile Web applications
with the help of many languages.
2.What are the drivers supported in Appium?
Appium support two drivers to Automate the
apps in different platforms,i.e Android driver and IOS Driver.
2. What are the areas to be covered in mobile device testing?
3. Do you have hands on experience on Linux OS?
4. What is the latest version of iOS ?
5. Have you ever done Security Testing on Mobile Devices/Apps? What kind of Security have you performed for Android & iOS
- There are some standards a mobile automation tool must meet in order to enhance your mobile QA
- The tool must be easy to use. It must be as easy as possible to record an automated test script.
- It needs to run on both native and object web properties, making identification of the components of the app as precise and consistent as possible.
- It should easily connect to the cloud
- It should enable more than functional testing to give the most comprehensive check of your app before it goes to your users.
·
Mockito – Java Framework, similar to MRUnit for unit
testing Hadoop Map reduce jobs.
·
PigUnit – Java framework that helps developers unit test Pig
Scripts.
·
HiveRunner – An Open Source unit test framework for
hadoop hivequeries based on JUnit4
·
Beetest – Unit Testing Framework for Hive Queries
·
Hive_test – Another Open source unit testing framework for Hive
·
HBaseTestingUtility – Java API for HBase Mini-cluster
and we can use this along with Junit/Mockito/MRUnit frameworks to unit test
Hbase Applications.
·
QuerySurge – Test tool built to automate Data Warehouse testing
and the ETL Testing process. JDBC-compliant db, DWH, DMart, flat file, XML,
Hadoop.
Often Big data characteristics are described with the
help of Five Vs (Big Data Volume Velocity Variety and Veracity). They are
as follows.
What is Business Intelligence?
Business Intelligence is the set
of processes, technologies, and tools that help an organization to transform
raw data into meaningful and useful information for business analysis
(Identifying business needs and determining solutions to business problems).
What is NoSQL
NoSQL stands for Not Only SQL and
provides mechanism for storage and retrieval of data that is modeled in means
other than the tabular relations used in relational databases.
Features of
NoSQL databases
·
Non-Relational
·
Distributed
·
Open-Source
·
Horizontally Scalable
·
Relaxing from ACID properties of RDBMS but adheres to BASE
theorem.
Organization Hierarchy Chart:
The organization hierarchy mentioned below will not be the same in all companies and differ from each other. We have placed only few titles in the chart.
Employability skills allow you to:
- communicate with coworkers
- solve problems
- understand your role within the team
- make responsible choices, and
- take charge of your own career
As a Software Tester, you
will be interacting with a lot of people from different sections of a business.
For example, if you are a QA in an Agile team, you need to be constantly
talking with developers, product owners, scrum masters and other fellow testers.
The way to do this is to have an automation framework which speeds up writing automated scripts, so that you just focus on the scenarios rather than spending time creating functions.
In this post, we describe how to write good user stories and what should be included.
One of the major tasks of a Test Manager is to prioritize which tests need to be run when there is not enough time to execute all the tests.
Use risk analysis to determine where testing should be focused.
Since it’s rarely possible to test every possible aspect of an application, every possible combination of events, every dependency, or everything that could go wrong, risk analysis is appropriate to most software development projects. This requires judgment skills, common sense, and experience. (If warranted, formal methods are also available.)
Test Automation, when done right, can be very beneficial to the team. The tips below will help you get the most value from your automated testing process and activity and highlights pitfalls to avoid when starting to automate your tests.
Quite often there are challenges in testing in an agile environments such as lack of documentation, changing priorities, less time to test, but with the right mindset and attitude, testers in agile team can provide a lot of value and help the team deliver good quality software on continuous basis.
It is important that, as testers, when we are involved in Web Testing, we should be familiar with the basics of HTTP to get a good understanding of how web applications work.
Most E-commerce Websites share a general common theme and structure, e.g:
- Homepage
- Search Results Page
- Product Details Page
- Order Form Page
- Order Confirmation Page
- Login Form Page and Accounts Pages
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