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Top 10 PHP interview Questions and Answers for 2019 – CBitss Technologies

It is safe to say that you are prepare for the Interviews in PHP Development for the first time and apprehensive for the Interviews that what questions can be inquired?

Try not to be Stressed!

Chandigarh Study encourages you for the preparations of the Top PHP Interview Questions in Web-Development. PHP is an vital part of the web world, and each web designer ought to have the basic knowledge in PHP. Here we are making reference to the list of most frequently of the time asked Top PHP inquiries Questions and Answers in 2018 that will assist you with being set up for the interview for the profile of PHP Developer.

Top-php-Interview-Questions-and-Answers-for-2019

Top 10 PHP interview Questions and Answers for 2019

  • What is PHP?

PHP (recursive acronym for PHP: Hypertext Preprocessor) is the most generally utilized open source scripting language, significantly used for web and application development and can be embedded into HTML.

  • What is the meaning of Hypertext Preprocessor?

PHP  previous  began as Personal Home Page tools, created by Rasmus Lerdorf in 1995, and it further gained the name “PHP Hypertext Preprocessor” which is the recursive backronym along the way  to speak to its extended capacities. PHP code can be just blended with HTML code, or it tends to be utilized in mix with different templating engines and web framework.

  • Why is the PHP called Hypertext?

PHP is called hypertext preprocessor as its libraries are as of now aggregated. At the point when a PHP page is arrive, the PHP code is look at or “parsed” by the server the page lives on and the yield from the PHP capacities on the page are ordinarily returned as HTML code, which can be perused by the browser.

  •  What are the primary error types in PHP and how they are different?

In PHP there is three primary sort of errors:

Notification – Simple, non-basic errors that happen during the script execution. A case of a Notice would be accessing an undefined variable.

warning – more essential errors than Notices, in any case, the scripts proceed with the execution. A model would be include() a files that does not exist.

fatal – this kind of errors causes an end of the script execution when it happens. A case of a Fatal mistake would get to a property of a non-existent objects or require() a non-existent document.

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  • What’s the difference between the include() and require() function?

They both include a particular file yet on require the procedure exits with a fatal error  if the record can’t be included, while include explanation may even now pass and jump to the subsequent stage in the execution.

  • What are Traits?

Traits are a mechanism that enables you to make reusable code in language like PHP where different legacy isn’t supported. A Trait can’t be instantiated on its own.

  • What is the difference between Session and Cookie?

The primary distinction among sessions and cookies is that sessions are put away on the server, and cookies are put away on the client’s computers in the text file format. cookies can’t hold different factors, But Session can hold various factors. We can set expiry for a cookies, the session just stays dynamic as long as the browser is open. Clients don’t approach the information you stored in Session, since it is stored in the server. Session is basically utilized for login/logout purpose  while cooking utilizing for user activity tracking.

  • How will you get the browser’s details using PHP?

One of the environment variable by PHP is HTTP_USER_AGENT which identifies the client’s browser and operating framework.

  • How will you generate random numbers using PHP?

The PHP rand() function is utilized to produce a random number. This capacity can produce numbers with-in a given range. The random number generator ought to be seeded to keep an regular pattern of numbers being produced. This is accomplished used the srand() function that determines the seed number as its argument.

  • What is the purpose $_PHP_SELF variable?

PHP default variable $ _PHP_SELF is used for the PHP script name and when you click on the “submit” button then same php script will be called.

  • How will you redirect a page using PHP?

The PHP header () function supplies raw HTTP headers in the browser and can be used to redirect to another location. Redirecting scripts should be at the top of the page to prevent any other part of the page from loading. Target location: Header is specified as the argument of the title () function. After calling this function, the exhaust () function can be used to prevent the parsing of the remaining code.

 

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Top Android Interview Questions and Answers for 2019 – CBitss Technologies

Why you can’t  be able to run standard Java bytecode on Android?

Answer: Android utilizes Dalvik Virtual Machine (DVM) which requires a exceptional bytecode. First of all, we have need to change Java class files into Dalvik Executable files utilizing  an Android tool called “dx”. In ordinary conditions, developers will not be utilizing this tool directly and fabricate tools will care for the generation of DVM compatible files .

Can Android application only be programmed in Java?

Answer: No, it is not required . You can program Android application  can be created utilizing NDK in C/C++. The NDK is a toolset that enables you to execute parts of your application  utilizing native-code languages for example C and C++. Regularly, great utilize cases for the NDK are CPU-intensive application for example game engines, signal processing, and physics simulation.

Distinction between an ordinary .png and a nine-fix picture?

Answer: It is a resizable bitmap asset that can be utilized for backgrounds or other images on the gadget . NinePatch class grants drawing a bitmap in nine segments . The nine patch images have extension as.9.png. It permits extension in 9  different ways, i.e. 4 corners that are unscaled, 4 edges that are scaled in 1 axis, and the center one that can be scaled into both axes .

Top-Android-Interview-Questions-and-Answers-for-2019

What are the distinctive storage methods in Android?

Answer: Android offers several distinct alternatives for data persistence. Shared Preferences – Store private primitive information in key-value sets. This occasionally gets constrained as it offers only key-value sets . You cannot save your individual java types. Internal Storage – Store private information on the device memory .

 

What is an ANR warning in Android?

Answer: ANR is short for application location Not Responding. Android frameworks show this dialog if the application location is performing excessively of task on the fundamental thread and has been unresponsive from quite a while .

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Can you convey executable JARs on Android? Which packaging is supported by Android?

Answer: No, Android stage does not support JAR arrangements . application are packed into Android Package (.apk) utilizing  Android Asset Packaging Tool (AAPT) and afterward conveyed onto Android stage. Google gives Android Development Tools for Eclipse that can be utilized to produce Android Package .

How can ANR be prevented?

Answer: One procedure that keeps the Android framework from finishing up a code that has been responsive for a significant lot of time is to make a child thread. Inside the child thread, most of the actual tasks of the codes can be placed, so that the fundamental thread runs with minimal periods of unresponsive time .

Difference between Mobile application Testing and Mobile Testing?

Answer: Mobile application  testing is the testing of application on a device which mainly focuses on functions and features of the application .

And Mobile Testing is the testing of the actual mobile device and target on the mobile appearance like Call, SMS, Contacts, Media Player, inbuilt browsers etc.

Define and clarify Android Framework.

Answer: Android structure is a arrangement of API’s utilizing  which the Android developers compose code for the mobile application . It contains the strategies and classes to compose the programming code.

Android structure incorporates a alternate arrangement of tools to make image pane, text field, buttons, etc. It also incorporates “Activities” with which the client communicates and “Services”, which are the programs that kept running in the background. It is a package of various components like Intents, Broadcast Receivers, Content Providers, and so on.

 

What is implied by Services?

Answer: Service is an Android part which keeps running in the background and acts independently. It does not provide any user interface.

Though the services are running behind the scene, a clients can proceed their work on various application . More often, the clients don’t know about the services which are running in the background. These services enable the framework to kill the procedure without interrupting the client’s progressing work .

For more Information About Android You Can Join Cbitss Technologies. CBitss Provides Best Android training in chandigarh


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Facebook Ads

5 Simple Ways To Get Higher Conversion  Rates On Your Facebook Ads

Something attractive and lightly ironic about Facebook ads is the fact that the worst and best examples are equally microscopic to the user – but for badly different reasons. Think about it. When the equitable person assume Facebook ad they expected think you’re condition to the small, usually meaningless  and miscellaneous hyperlinks or pictures advertise to the side of a company’s profile. These broadly overlooked ads are called attitude ads or domain ads. Learn Conversion Rates with PPC Training in Chandigarh.

facebook ads

On the flip side, a well-accomplished Facebook ad will also be microscopic in the sense that the user won’t recognize that it’s definitely an ad. The desktop or mobile Photo Page Post ads are the most likely pepartions to achieve this, as sometimes users will directly mistake an ad for actual posted content applicable to the profile.

As business partner or entity looking for ways to make your Facebook ads absurd at a much greater rate using a critical, targeted method, we’ll be consider at five key access to make sure your ads apply to the latter, more fruitful category.

 

  1. Have A Clear Objective When Making Ads

From an emotional viewpoint, if you don’t absolutely put in the effort to understand what your consideration is in creating an ad, how your ad will be placed and accepted by an online audience, or the objective of building that ad in the first place, it’ll show. It’s straightforward if you dwell on it for a little: if you don’t understand what or how you’re announcements  removed onlooker has no chance of getting your information , the attention of efficiency of your message cannot be underrate.

Check out this page for a extensive attitude on a number of different advertising approach decision by Facebook and general advice on their management based on the most likely decision that advocate expect when exploit a definite method. There is some concern between the facebook ads and the behavior of confidential growth, such as the fact that Facebook applications help reimbursed application installations and generate less development in the number of new users. Meanwhile, more complex and conducted advertising methods such as paid post obligation have a number of possible alteration results: increased likes, increased agreement through commenting, advocate a post so that it receives more lead ship and so forth. PPC Training in Chandigarh is the best place to learn PPC Ads campaigns.

When choosing and creating the covenant of an app, having a mischievous vision of your crowd, the Changes of surrounding your campaign, and your construct set of growth results is the first thing you need to make sure you’ve checked off.

 

  1. Use Targeted Marketing

It’s a given that among the people that see your ads, a portion will actually skip over it while another group of body will fulfill growth objectives. The point of using forward marketing techniques to fairly structure the content and message of your Facebook ads adapt with the idea of settled the chances that your designed audience will be the ones to debate your advertisements and accomplish those growth objectives. It basically serves as a ditch for relevance on that level.

Targeted marketing is more finished and powerful than it seems formally. Geographical and detailed data ending with labels of interest belong to some of the basic metrics involved.

 

  1. Utilize The Power Editor

It’s good method to fully evaluate the natural features and functionalities provided by a operating system before spin towards third-party solutions, and Facebook ads are no excepting. In our case, one important tool that’s sitting right in advanced of our eyes is called the Power Editor.

Essentially, the Power Editor is a assembled in organizational and administrative tool that allows you to view various ad campaigns and understand the progress and performance of concerted ad groups or ads.  Facebook has its own instructor showing new users the ropes to this dashboard and adjoining the powerful features applicable to help the management process.

Familiarity with the Power Editor mug will allow you to quickly oversee large drive that deal with many ads, as well as aid you in other areas, such as addressed marketing by allowing you to create custom gallery.

 

  1. Objectively Measure Your Ads And Their Performance

Power Editor isn’t the only capable, native feature available to Facebook advertisers. The Facebook ads controller element gives you the ability to really catch the excuse of data through metrics such as cost per result, the activity of the customer’s company and purchasing behaviors, and even to generate a list of results of happy conversion.  

 

  1. Test Out Creative Designs

Visual delivery usually cause the most direct, appealing, and attention-capture results when it comes to a user’s first effect of ads. Many companies can find a strong point of sale in the visual presentation by showing case studies applicable to the work of your business. Visuals that are absorbing while grab the essence of the company’s purpose are the ideal type of image to blend into an ad in order to infuse it with a conversions twist. Testing is also vital to this process. Choosing two to three drawing and seeing which one is best accepted by an audience, debiting the amount of cluttering text, and sizing your ads accordingly all factor into the esthetic impression made on users as they scan a page that contains your ad.

 


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WordPress

What is WordPress : A guide for beginners

 

WordPress is a Content Management System (CMS) that helps users create Dynamic Websites and Blogs. This means that Open Source based on the PHP MySQL Framework is absolutely free CMS.

WordPress is the web’s most popular blogging system. The user who manages to manage, facilitate and manage the management of the website from their CMS is managed.

Object

  • Content Management System (CMS) ?
  • WordPress Features
  • WordPress Plugins
  • WordPress Themes
  • Advantages
  • Disadvantages

Wordpress

 

What is Content Management System (CMS)?

Content Management System (CMS) is such a software. A lot of data such as text, photos, music, documents etc. Stores and provides them in our website. It helps to modify, edit and publish the contents of the website.

WordPress Features

  • User Management: This helps in managing user information, such as changing the user’s role, creating a user (subscriber, contributor, author, editor or administrator), to create user, change password, and user information. The main part of the User Manager is Authentication.

 

  • Media Management: This is a tool that manages media files and folders. This allows you to easily upload, organize and manage your files on your website.

 

  • Theme System: This helps in modifying the site view. It include pictures, beauticians, format records and custom pages.

 

  • Reach out with Plugins: Many modules are accessible which give custom capacities and highlights as per client’s needs.

 

  • Search Engine Optimized: This provides search engine optimization (SEO) tools that make on-site SEO easy.

 

  • Multilingual: It can translate all the contents of the page into any language according to user’s instructions.

 

  • Importers: This user helps in importing data as post. It acceptation custom files, discussion, post pages and tags.

 

Whenever we think of opening a blog, we become baffled between lots of options, such as Blogger, WordPress, Tumblr etc.

What blog platform we select depends on what we want to do with the blog. If you want to be a blog just for fun or to control your personal journal, then you can use BlogSpot, WordPress.com, or Tumblr because they are free and also easy to manage.

If you are building a blog to promote your business or earn money, then use a professional platform like WordPress.org (self hosted).

 

WordPress Plugins

WordPress plugins are a specialty of WP software. This helps you add new features to your featured site. There is a WP plugin for everything. All you have to do is find the plugin and add them to your site.

WordPress Themes

Through WordPress theme you can change the design of your website. Many free theme options are available in WP and many premiums too. By using it you can easily create a effective website.

Advantages

  • Customization is easy, the user needs to know
  • This is an open source platform and available in free.
  • CSS files can be modified according to the needs of the user.
  • There are many plugins and templates available in free. User can modify these plugins according to their need.
  • It’s very easy to edit the content in it, because it uses the WYSIWYG editor, which means that the user will see what you type, without having to do the commands.
  • Media files are easily and quickly uploaded.
  • Customization is easy, according to user’s needs.

Disadvantages

  • By using too many plugins the website can be heavy, which will cause loading slow.
  • To get the modification in the WP website, it is important to have a PHP knowledge.
  • It is difficult to modify graphic images and tables.

More information join CBitss Technologies. CBitss Provide WordPress / MySQL / PHP Training in Chandigarh , join now


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MySQL

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MySQL Data Types

 

  • Introduction to MySQL Data Types
  • Rules for using MySQL Data Types
  • Different MySQL Data Types

 

Introduction to MySQL Data Types

Before creating Tables, you should know about data types. Data types have an elegant role while creating tables. Data types apply to fields. Every column stores a different kind of value in any table. Data types are used to define what kind of value the store will store. Every column is defined when creating the data type table.

Imagine that you are creating a table that will store information about employees. In this table you want to add a column that will store the names of the employees. For this column you will define character data type while creating table. This is similar to creating a variable in a programming language.

In this tutorial, I’m just telling you about data types. You can learn how to use them in the tables. MySQL data types can be divided into 4 major categories.

  1. Numeric
  2. Character String
  3. Binary String
  4. Temporal   

Mysql

 

Rules For Defining Data Types

Before discussing these data types with detail, let’s try to know some of the rules that you should keep in mind while decrying data types.

  1. You should use the same data type that will represent your data properly.
  2. You should define a data type that can define the data at least in memory space. By doing so you save resources.
  3. You should use data type that can store the maximum value of your data.

Now let’s try to know more about the data types used in MySQL.

 

Numeric Data Types

Numeric data types are used to store numeric values. Numeric types have been divided into 4 categories. These are being given below.

Integer

Integer types are used to store whole numbers. Whole numbers are numbers that do not have fractional part (decimal and numbers after that). Integer types have been divided into 5 categories according to size.

Types Explanation
Tinyint This is an integer data type to store a very small value. In it, you can store any number from 128 to 128.
Smallint This data type is used to store more value than tinyint. In it you can store a value of -32768 to 32768.
Medium Int This is the data type to store a medium size value. Its range ranges from -8388608 to 8388607.
Int This is the most popular integer type, in which you can store value from -2147483648 to 2147483648.
Big Int This is the largest integer type and you can store any value up to 9223372036854775807.

      

Floating Point

Floating point numbers are numbers that include the fractional part (decimal and the number after that). Floating point numbers have been divided into 2 categories according to size.

Type   Explanation
Float   Float single precision (7 digits after decimals) is the floating point type. Its size is 4 bytes.
Double   This is double precision floating point type. Its size is 8 bytes.

 

Fixed Point Types

Fixed point data types are used to store decimal numbers. Decimal numbers contain a number that is integer, in which the fractional part can also be included. The special thing of this data type is that in it you can store only fractional part. You can also control values ​​as if you want to store 2 values ​​after decimals, you can also do this by using this data type.

Bit Type

Bit data type presents the bit field value. In the Bit data type, you add width, it shows how many bits of the value to store.

Example – bit_column BIT (4)

 

Character String Data Types

Character string data types represent alphanumeric values ​​(number and character). Character string is a very valuable data type, many programming languages ​​use it. There are 3 types of character string data types in MySQL, let’s try to know them.

 

Type   Explanation  
Char Char is a fixed length data type. When you define a column of char type, you have to give the maximum length (the number of bytes you want to store). You can not store a value greater than that length.
VarChar VarChar is a variable length data type. You can also store values ​​of more size than the length you are given in it.
Text   Text type stores unstructured text. These can store the value of the text variable length.  

  

Binary String Data Type

Binary values ​​are sequences of bytes. It is stored as a pair of 8 bits. You can also store images, sounds, movies, and executable files in the Binary string data types. Because these are all in binary format. There are 2 types of binary string data types in MySQL.

Type Explanation
Binary This data type is the same as char but it stores binary byte strings.
VarBinary This is similar to the data type varchar but it stores the binary byte string.

 

Temporal Data Type

In MySQL, date and time types are called temporal types. In such data types, you can store temporal information such as time, year, date etc. Temporal data types are of 5 types.

Type

Explanation  

Time type Time store is done in this data type. Its size is 3 bytes.  
Year type This data type is used to store any year.
Date type Date type is used to store single date.
DateTime type This type is used to store both date and time.
Timestamp type It also stores date and time like date Time type, just the format is different.

 

If you are in Chandigarh and are looking for MySQL and PHP training in Chandigarh then join CBITSS Technologies. CBitss  is the Best Mysql and PHP Training Institute in Chandigarh, join now.

 


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