What is Waterfall Model?  Waterfall Modal is a traditional model and it is a sequential design process. In Waterfall Model. we can’t do backtracking i.e. if we once freeze the ...
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Some technical words that are in used while testing: - Error: - Mistakes done in program or code that is written by a developer is known as Error. It is ...
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What is Software Testing? Software testing is the process of checking or testing all defects and it ensures software fulfilled all requirements and business statics. Or Software testing process is ...
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If you are getting error while importing or restoring the database dump like as mentioned below : MySQL: Can't create table './dbname/data.frm' (errno: 150) This may come due to foreign ...
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What is Bootstrapping? In Angular 4 we use a bootstrapper. You can find the bootstrapping logic in the src/main.ts module: import { enableProdMode } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import ...
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BASH has many Shell Environment variables on which its function depends. The list of environment variables which is set for current session can be listed out using env or printenv commands. $ env $ ...
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Vim Editor is command line text editor, an enhanced version of 'vi'. To open a file in vim use below mentioned command:- $ vim myfile There are 2 modes of ...
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Welcome!! Fellow Angular 4 aspirant, I have written this tutorial in hope of helping audacious people like yourselves who want to create their first angular 4  application with Windows OS ...
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LINUX FILESYSTEM Linux Filesystem is an inverted tree structure which consists folders and files. At the root of the filesystem is '/' (forward slash). Everything under Linux is kept inside ...
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Issue "unable to find the JDK in the system" can occur while doing a new installation or in existing installed NetBeans. This can be resolved by following very easy steps: In New ...
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Manual Pages Manual Pages is one stop help for the commands and utilities in Linux OS. To read the manual pages man command is used. $ man uptime $ man dmidecode One ...
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Details about Command Line Interface In early days of computing, there was no Graphical User Interface. There was only CLI to interact with the computer. Computers back then were very ...
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Operating System: Introduction The operating system is the group of software that works together to operate the underlying hardware and provide an interface for user applications. User applications like media player, ...
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How to  create Bootable Media We are now going to install CentOS 7 from a bootable USB drive. To create a bootable USB drive of CentOS 7 we need CentOS 7 ...
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I/O REDIRECTION There are three standard devices in CLI, they are Standard Input, Standard Output and Standard Error. Default Standard Input device is Keyboard. The screen is the default Standard ...
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Ethereum is a platform created to build the decentralized app which will have no downtime, fault-tolerant, No censorship and No third-party interference. Our traditional application currently depends on some big ...
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 What is PHP Traits? The concept of Traits is introduced in PHP 5.4, which is basically a group of functions which can be used in any other classes. To overcome ...
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What is Interface? An Interface contains methods without body i.e {}. Means, there we get only the declaration of the function, not the definition of the function. A class which uses ...
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We have a table structure with table name EMP as showing in below image 1. Write A Query to find 2nd Highest Salary in MySQL? SELECT SAL FROM EMP ORDER BY ...
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What is Abstraction in PHP? In one way, hiding unnecessary details or implementation about the functionality from the user is called  Abstraction. For Example:- We all use the functionality of ...
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We have mentioned some Interview Questions on iOS App Development with Swift in this Article. What is the difference between let and var in swift? let and var are kind ...
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It is one of the important programming principle in OOPs Concepts. It will let you to code in a more modular way by which you will be able to reuse ...
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Many times we want to insert a table structure in Gmail message. But unfortunately, Gmail hasn't provided such feature. Even outlook provide such feature. So how to resolve this issue in a ...
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In this article, we will be talking about how to insert update and delete records using Core Data Framework. To be very clear, Core Data is not a database it ...
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What is Core Data? Core Data is a kind of framework is build around SQLite, so that we can manage the model object layer. In a nutshell if we talk ...
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What are Push Notifications? Push notifications is a kind of message which an App publisher wants to notify a user. It is a server pushed message. For Example, there is ...
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What is a UITabBar? As you see in various application there is a bottom bar, that is actually a UITabBar which has buttons, and on the click of those applications screens ...
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What is a UIButton? A UIButton is kind of control provided by Apple so that user can perform some interaction and on the basis of that we can execute our custom code. In ...
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What is Storyboard? Storyboard is kind of file which you see in each and every application you create, in this article we will have a brief discussion on what is ...
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API Callings What is an API? API stands for “Application program interface”, well that doesn’t explain much; so, an API is a set of protocols, procedures, tools that helps in ...
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