Best Ways to Learn Tableau

It’s always fun to learn something new and interesting but it’s quite challenging to figure out from where we should begin especially when it comes to data related concepts. As we all can see, today’s world is getting so advanced with each passing day that massive amounts of data are generated every second. Companies whether small or large scaled use this data to drive insights for their businesses through various means of data analysis and user-friendly data visualization dashboards. Data visualization is the graphical representation of data using visual elements like charts, graphs, maps, etc. It’s a unique blend of different colors, dimensions, labels that helps in better understanding of data trends and patterns. Data visualization is an inevitable aspect of data analytics that consists of various tools and one of them is Tableau which is considered the ultimate data visualization tool.

In today’s article, we are going to discuss the best ways to learn tableau but before that, we need to properly understand what Tableau exactly means and what role it plays in the process of data visualization. If you are student and want to get help for Tableau assignment help, Our experts are providing you with the best assignment help. So let’s start with a brief introduction.

Tableau

Tableau is one of the most trending and popular data visualization tools among the data science community and also one of the best Business Intelligence software in the world. It is such a tool that not only allows you to create fast visualizations of data but also helps in making data more accessible with its various visual capabilities. Tableau was developed in 2003, it offers you to create different charts, maps, graphs without the use of codes. Apart from this, it also provides some extra features such as data mining, calculations, cleaning making it one of the best visualization tools for professionals. Tableau is one of the most powerful tools that combine features in a multitude of ways to build strong visualizations that makes the process of data analysis fast and easy. One specialty of Tableau is that it runs almost 100 times faster than existing solutions and you can easily integrate it with the R programming language that makes the processing of complex data much easier. Like any other programming, it takes time to master the art of Tableau and a number of best ways to learn tableau online that are very cheap and time-saving.

 Main Features of Tableau

  • The drag and drag capability makes it quite easier to use with no programming required
  • Tableau is very compatible as it can work with a number of sources like Microsoft Excel, SQL, etc
  • It is a very powerful software that can leverage massive amounts of datasets using various dashboards
  • It has real-time reporting that allows you to generate reports within seconds.

Best Ways To Learn Tableau

Follow the Tableau Community: Before you begin to start your preparation of Tableau, it’s very important to subscribe and follow the tableau-related lists to get any updates and information on various aspects of this amazing software. You can get proper guidance and an idea on how to start your preparation from Tableau Reference Guide. You can also follow its Twitter handles like @tableaupublic or @HighVizAbility and similar other pages and blogs related to Tableau.

Free Training Videos: This is another best way to learn Tableau as it itself provides several videos and resources to help us learn Tableau and that too free of cost. These videos include different types of content that provide proper guidance on how to get started on Tableau, how to analyze, prepare, share and publish the Tableau data online on different platforms. Apart from this, it also provides an Instructor-Led training classroom where you can personally talk to the experts and get your queries solved.

Align Motivation and Skills: Proper alignment of skills set and motivation is one of the best ways to avoid frustration and it helps you to concentrate more on your subject. You need to identify and develop that motivation within yourself to create a visually appealing data story. Creating this skillset generally include:

  • At least working knowledge of data
  • Basic experience in Data Analytics
  • Basic mathematics and Statistical Knowledge
  • Experience in Microsoft Excel and Google Sheets

Get Involved with the Data: If you want to learn Tableau at a faster pace you need to take dive into the data which means you need to deal with large and clean datasets to produce an incredible and unique visualization. Learning Tableau is all about data and if you have that ability to play with data, no one can stop you from becoming the master of Tableau. However, Tableau also provides a free public gallery where you can find different workbooks to properly understand Tableau.

Dedicate Time and Practice: There is a famous saying “Practice makes a man perfect”, for learning anything its very important that you are practicing it on a regular basis and that too with proper dedication. Tableau is a powerful program that comes with a lot of features and for exploring them you need time and practice each of them separately. Tableau offers a lot of resources from where you can practice by dedicating almost 30-60 minutes every day. You can also install Tableau public to practice and learn interactive data visualization online.

These were some of the main and best ways to learn Tableau in the most effective way. I hope this article was helpful and it must have cleared your doubts regarding various aspects of Tableau software and what role it plays in the visualization of data.

Difference Between PHP VS PYTHON

PHP (Hypertext Processor) is an open source, object-oriented interpreted programming language. It is one of the most preferred languages for web development. Fast speed and dynamic website management are its distinguishing features. It is a loosely typed language and platform independent as well. Python on the other hand too is an open source interpreted high level programming language. That means both the languages offer similar levels of ease in programming. This article helps to discover more about the attributes and features of PHP and Python, and assists programmers to compare PHP v/s Python.

While comparing both the languages there are certain parameters that are to be considered. These parameters help analyse the performance of both languages relative to the specific outputs. The parameters that will be discussed in this article are performance, platform dependence, level of difficulty, packages, dynamic typing, integrating with other languages, server support,security, control and community.

COMPARING PHP VS PYTHON

Performance

PHP being a dynamic interpreted language does not have the compiling job and is directly read by the machine when run. Every time it is run it is read afresh by the machine. So it’s actually the speed factor that dominates the performance aspect. But thanks to the new version, that has multiplied the speed of PHP. It manages to have an excellent speed and works well while performing the specified task. Python on the other hand is really versatile and easy going but it lags behind PHP when it comes to speed.

Platform dependence

PHP has a diverse base of platforms including Linux, Windows, Unix and Mac OSX. It is because it requires a web server for running and is independent of the OS. While python too is a platform independent language, it uses PVM for converting codes to machine codes. So here both the languages offer a wide base of operating systems.

Level of difficulty

Python unequivocally is easier to learn and execute. Programmers usually prefer to begin programming with python. Although it is easy to learn for the beginners, it is equally a tough job to master programming in python. But with practice it is all achievable. On the other hand, PHP originally developed as a personal homepage tool was not intended to be a general purpose programming language. This made it a bit difficult to learn. So if the question is PHP vs. Python, when it comes to ease of learning, python wins the race.

Packages

Python has a great range of libraries supporting it. These libraries can be accessed by the developers for performing innumerable operations with great ease. It is one of the distinguishing features of python. However, PHP does not come with a lot of libraries that support diverse functions but it has a core Standard PHP library (SPL) along with some other popular libraries. This narrow support of libraries however, does not affect the popularity of PHP. Even the language behind Wikipedia is PHP.

Dynamic typing

In compile-time coding it is mandatory to specify the variables, but the dynamic typing feature makes it easier for developers by cutting the variable specification. The variables in such a method of typing are interpreted on run time.  Both the python and the PHP programming languages follow the dynamic method of typing.

Integrated

Both languages offer remarkable compatibility with other popular languages. Integrating allows accessing and running programmes in other languages. Both Python and PHP can be integrated with languages such as C, C++, javascript etc.

Server support

Server support is a very crucial aspect and the larger the number of servers that support a language the more popularity it gains. Server support enhances and broadens the applicability of the language, which results in widespread usage of the language. This is quite a reason behind PHP being the developing language for Wikipedia development.  Both the languages secure a great support of web servers. Looking at python the most popularly used servers are Apache HTTPD and Django. On the other hand popular open source servers used with PHP are WAMP, XAMPP, MAMP and LEMP among others

Security

On the question of security, python grabs the medal! Python is renowned for the security that it offers. Security is not generally a concern of programming languages, the reason why most of the programming languages are insecure. Its security feature helps it stand out from the rest of the languages. On the other hand PHP does not provide a tight security against threats. Its security is quite conventional and requires installing additional programmes for ensuring code safety.

Control over the websites

One of the reasons behind the stronghold of PHP over python in web application programming is the strong control that it offers over the websites. The developers can conveniently change or update the websites using PHP.

Community size

PHP has incredible community support owing to the long period of time it has been in the market. PHP community support adds to its other features and makes it more accessible and popular. Python too enjoys great community support. Due to its active community support it is one of the most popular and most preferred programming languages.

OVERALL PERFORMER

In the battle of PHP vs. Python, after going through the above comparison, readers might have got a rough idea of which language suits their needs better. It is not necessary that everyone compares two languages on the same parameters or that everyone has similar demands from a programming language. These were some of the general parameters based on the most popular demands of the programmers. Going through these parameters one can conclude that both python and PHP play on similar grounds. However there are some aspects where python outperforms PHP. So it wouldn’t be illegitimate to call python the winner. But there are definitely exceptions to it. Python can be a good choice for beginner or intermediate level programmers but if one has adequate experience in PHP, they don’t even need to look around and can continue working with it confidently.

How to set up an EV charging station?

Due to the rising trend of electric vehicles, many businesses are taking it as an opportunity to promote their brand plus do something good for society. It is very clear that electric vehicles are the future and is a great step towards a green environment. Also, the increasing prices of petrol and diesel are making people go for electric vehicles. It is much cheaper and works great for the environment. So seeing all this, the businesses are hosting EV charging stations. This is a great way to attract customers to their place which helps in brand awareness.

Like for example, one has a business that will benefit from an increase in the number of people entering the place, the presence of an EV charging point will attract customers. Usually, the EV owners probably look for that place where they can conveniently charge their vehicles and can have a good time nearby. This way the business hosting an EV charging point will be able to get more customers. Even though the customers won’t buy anything but surely, they will come across your brand and its product. Seeing all these benefits, many businesses are coming forward to set up an EV charging station. Also, from the employee’s point of view, they feel valued by the business as they will feel that how responsive their employers are for them. Also, it will help the employees to be more productive as they will be able to focus more rather than spending time seeking the charging spot.

 

So, if you are interested to set up an EV charging station, the following points will help you out:

 

  • Acquaint yourself with basics- Before making any decision, try to know about electric vehicles. Also, you should know about the different technologies of EV charging for a clear understanding.
  • Research- Now you should research the electric vehicle charger. Know that there are three levels of EV charging. Level 1 charger is a basic one that usually has a low charging speed. Level 2 is quite better than level 1 as it works on a 240V circuit. Level 3 charger, the best one, is widely popular. This is most preferred because of its amazing speed to charge the vehicle. So while choosing one should know about the type of electric vehicles you want to charge through your charging station. Though it is always recommended to start from a level 2 electric vehicle charger.
  • Location- Now one has to decide about the location of the charging station. The business can select their own property where they are actually based. Make sure to choose that location which has a high crowd so that you can attract a large number of people.
  • Find the best hosting provider- Link with the best hosting provider on the basis of their ratings and recommendations. It is important to contact the trusted companies on whom you can rely blindly for their services.

So above are points that will help you to set up an EV charging station efficiently.

Top 10 Vulnerabilities Faced by Android Apps

Mobile applications are crucial in today’s business environment. Apart from being a source for revenue generation, they help build a vital relationship between companies and their customers.

However, in terms of mobile app security, the figures are distressing:

  • About 75% of apps would fail even a rudimentary security assessment.
  • More than 80% of apps have at least one security shortcoming.
  • Mobile security vulnerabilities have been discovered in more than 90% of ioS and Android apps

Being the popular and much-admired mobile operating system, Android-based apps are always at risk for security threats.  Hackers constantly try to break in and get access to the sensitive information of the users, for their vested interests.

Android application vulnerabilities have been a hitch due to the Google Play’s open format, and also due to the side loading of apps by the users, taking away any supervision in terms of the safety of apps.

Expert testing of iphone app development agency has revealed that in the majority of cases, insecure data storage has been the most common security flaw.

Nowadays mobile phone operating systems employ convoluted security processes.  By default, an installed app can only access files in its own allotted sandbox folders, and user rights do not permit files to be altered from the system.  However, mistakes made while developing and writing code for mobile apps can create security susceptibilities and hackers can exploit those.

Following are the most common security vulnerabilities faced by Android apps:

Android Fragmentation Risks –

In layman’s terms, Android Fragmentation indicates the fact that a huge number of various Android OS versions exist and are operational in the digital world.

Not all the Android users will be able to update their particular OS at the same time.  Also, every app that is deployed in the Android market should be able to run on majority of the OS versions so as to not isolate any users.  Considering the variability of Android versions in existence, one can very easily figure out why Android fragmentation is contemplated as the main weakness of the OS.  According to a report, about 40% of Android users around the world are no longer receiving crucial security updates from Google, which makes them vulnerable to risks of malware attacks, data theft, and a range of security breaches.  This apparently adds stress on the developers as they have to create apps for OSes with unpredictable security.

Pervasive fragmentation in Android has varied and extensive effects on the digital market along with both hardware and software development practices.

Android App Permissions –

Android apps can request extensive permissions which, if granted to a malicious app, can undermine the device, its resources and the data stored on it.

To avoid privacy and security issues, by default, the Android operating system grants minimal privileges to apps.  The apps then need to explicitly request additional permissions from the end-user, to perform privileged tasks, such as making phone calls, sending/reading SMS, accessing the GPS position, etc. Therefore, to avoid suspicion, malicious apps usually request very few (or no) privileges.  However, Android apps can synchronize and delegate tasks amongst each other, through inter-process communication (IPC) messages. The likelihood to request an action from a malicious app, poses a threat of permission re-delegation vulnerabilities.

Customizing the OS –

Although this may sound a bit odd, customization of the operating system is a major security threat faced by Android applications. In order to achieve more functionality, it is very common for users to customize their operating system. However, few users have the propensity to alter the OS by assimilating launchers and customization layers which in turn creates gaps in the security measures.

Downloading Apps from Unauthorized Sources –

Given the open-source nature of Android, building an Android app is a free affair. Due to this Android applications are not just limited to the Google Play Store, they are available on a variety of stores – even the unauthorized ones. It is therefore quite easy for someone to build malicious apps and upload them online.Also, it is important to note that time and again users lapse into unauthorized sites to download apps in order to avoid paying for an app they want. They then unintentionally download malicious apps which would attack their device and sneak into their data.

Lack of Binary Protection –

This is another serious mobile app vulnerability that can unmask the users’ sensitive data to hackers. Utilizing reverse engineering, attackers can get their hands on such sensitive information like business logic, passwords, API keys, etc.  A hacker, by using automated tools, can reverse engineer an app and transform it to execute malicious actions.

Improper Encryption/Insufficient Cryptography –

The two conditions in which a system’s cryptography may get infringed to reveal sensitive data are:

  • Weak underlying algorithm that is used for encryption and decryption.
  • Flaws in the implementation of the cryptographic process.

There are several factors that can result in broken cryptography in mobile apps, such as:

  • Circumventing in-built code encryption algorithms.
  • Improper management of digital keys.
  • Usage of custom or denigrated encryption protocols.

Inadequate cryptographic controls can result in the unauthorized accessing of sensitive data (for instance personal information of the user) from the device.

Improper Session Handling –

In order to make the mobile app user-friendly and easier to use, very often mobile developers allow non-expiring or long user sessions.  Cutting the log-in time reduces the friction for the users.  Also, this helps to moderate the time to purchase and checkout which in turn helps the company to generate more revenue.

For session management, mobile apps utilize OAUTH tokens, SSO services, and cookies.  In order to warrant proper session handling, the mobile app should authenticate the user via the backend and then issue a session cookie to the app.

Improper session handling happens when a hacker could gain access to a session token at any point in a transaction between the mobile application and the backend servers.  An attacker having gained access to the session tokens can imitate a valid user and perform sensitive transactions. In critical cases, a hacker might masquerade as an administrative user and gain access to higher privileges, which could lead to dangerous outcomes.

Obsolete Tools to Test Mobile Applications –

Many developers are still using testing tools for android applications that are only compatible with antiquated Angular 8.0.

JavaScript-Binding-Over-HTTP (JBOH) and JavaScript Binding Annotation –

Network attackers can manipulate the network by taking over HTTL traffic through JavaScript binding (add Javascript Interface) and loading Web view content over HTTP.  Hackers frequently make posts on the user’s social network from the device without needing any special Android permissions in the host app via HTTP or DNS hijacking.

Read more – Apps to Install and Avoid on Your Smartphones

Lack of Multifactor Authentication –

A mobile app is exposed to attack by hackers in absence of proper user authentication.App developers/administrators would install the anti-virus, build a firewall, deploy encryption and carry out periodical vulnerability tests; however, all these efforts will be in vain in the absence of multifactor authentication.

Multifactor authentication is the process of employing an additional layer of security authentication in the form of a confirmation code sent through SMS or answer to a personal question used for authentication.  Multifactor authentication is crucial to ensure that the account is only accessible to the user who owns it and not to anyone else.

It is perspicuous to recognize that despite considerations, some security challenges carry a greater chance to be missed. Therefore, it necessitates app development teams to espouse a secure Android development process.

In the web development realm, Mtoag is the best service provider for drupal module development and leaves extreme marks across the globe

4 Worst Defect Reporting Habits and How Testers Should Avoid them

Defects are serious and often small errors/mistakes can be expensive for a business. Anyone involved in the software development process knows what to do when they find a defect. They need to report it, either in a defect tracking tool or a defect tracker. The principles for using the defect tracker are the same. It is obvious that defect trackers do not guarantee 100% defect-free software yet by implementing the best practices, this is certainly possible to improve your software quality. In order to appreciate the good, it is necessary to recognize what is not. We know for sure that it is impossible for a QA manager to achieve a 100% bug-free application. However, it is at the discretion of the QA manager to lead things the way he wants to. He can recheck and decide if the defect is valid/complete or not, and it is solely his decision.

1.Some Developers have a Lazy Attitude

Some clients also have an SLA (service level agreement) for the number of acceptable and invalid defects. Once this number exceeds the limits, they can penalize the contractors for each invalid defect reported. Thus, defect tracking should not be considered a simple and easy process. Defect tracking should be done with due diligence.

Resolution: It is important to take responsibility for your deliverable. Sometimes a defect may come back due to lack of information, or simply because it may not be a bug. It may not always be a developer’s fault and it is not that they may not want to own the problems in the app. It could definitely be confusion or a mistake on another team’s part. So it is important to take defects seriously, and leave no room for confusion by actively participating in the defect reporting process.

2.Recording Bugs in Haste

During the testing phases of a product development lifecycle, there are different stages where defects can appear. Sometimes, developers fail to understand the severity of an issue or bug and report them in a haste. Often, a bug may not be affecting the quality or performance of an app but it may have an effect on the user experience. It is important to make your decision wisely.

Resolution: Anyone reporting a bug should not be in rush. Make sure that they completely understand the impact of the issue from different angles. This is how testers can add value to the software quality assurance process by using defect tracking tools. It is not just performed to ensure that it is not working, it is important to address the concerns as to what will happen if this continues to not work. There is a huge difference between the two situations, and both should be considered proactively.

3.Creative Suggestions and Feedback

Testers have a great opportunity to provide their feedback and suggestions on how to improve a software app. In a defect tracking tool, a tester can also submit a response to provide suggestions to enhance the features. This is where a tester can get creative and think out of the box to improve the user experience.

Resolution: if a tester thinks that a certain feature is missing a factor and knows how to add something extra to that feature, he should share his idea. The only worst thing that could happen is it could get rejected. But the main thing here to be creative and keep trying. Make sure testers use this skill cautiously. They should never make negative comments. Instead of making direct comments, alternative ways should be used to define the suggestions.

4.Working on your own all the time

Another mistake that a developer makes is that he tries to work on a piece of code all by himself. He never seeks help or assistance from other team members, so much so that he ends wasting his own time. Sometimes, he assumes that he is building a product the right way but you may not be doing so.

Resolution: It is important to involve other team members in your defect tracking process their work can improve when you discuss ideas with them and also help in mentoring less experienced members in a team, who are most likely to get stuck in the defect tracking process.

All the above defect reporting habits should be avoided so that QA and development teams can make the most of their software testing efforts. They should also use their defect tracking tools diligently to achieve the expected results.