An exception is nothing but an unwanted or unexpected event that occurs during the execution of a program. In such case, normal flow of the program is disturbed, and program terminates abnormally, which is not a good practice, therefore there is a need to handle these exceptions. Exception handling is a mechanism to handle runtime …
Traditionally, each individual task (Ex – mailing, Web hosting, database etc) of an enterprise, used to run on individual dedicated servers. It used to be like – 1 server, 1 operating system, 1 task – even if these components were not using the full capacity of the given server/machine on which they were running. With …
1. Never rely only on reading interview Q&As Interview Q&As mostly distract you rather than help you. Even if you get similar questions asked in an interview; the way you answer those would be different if you really practiced that specific topic and not just read about it in interview Q&As tutorial. Interviewer can easily catch the gaps in your answer and …
First things first A repository, also known as repo is nothing but collection of source code. It allows you to save versions of your code, which you can access when needed. Setting up a repository Initializing a new repository: git init git init command allows us to create a new repo. It is a one-time …
Source code management Source code management (SCM) is used to keep a track of changes in the source code repository. A repository is nothing but collection of source code. As software project grow in lines of code and number of contributors/ developers, the cost of communication overhead and management complexity also grow. SCM tracks a …
JWT stands for JSON Web Token. In simple words, it is an effective way of transmitting information between parties on internet. Let us first try to understand the purpose of tokens in general with an analogy of usage of tokens at some candy shop. You first pay for the items that you want to buy to the …
Functions, Conditional Statements and Loops in Bash Let’s continue leaning about bash scripting. In this article we will deep dive in Functions, Conditional Statements and Loops in Bash. You can checkout Basics of Bash before deep diving into scripting part. Function in bash script To organize and reuse code with more efficiency and readability of the script, …
What is bash? Bash is the shell or command language interpreter for GNU/ Linux operating systems that processes shell commands. In other words, it’s a shell interpreter that takes commands from user and performs actions with the help of underlying operating system services. Bash currently runs on nearly every version of Unix. What is bash …
What is OAuth: It is a framework to facilitate delegated and controlled access on behalf of user. So basically, it is a protocol that allows a user to grant a given third-party web site or application access to the user’s protected resources, without necessarily revealing their long-term credentials or even their identity. There are different …
Optional was introduced in Java 8 and its primary objective is to prevent NullPointer exceptions in code. Consider it as wrapper/container object which may or may not hold a non-null value. One needs to unwrap/de-containerize it to get the actual content using methods provided by Optional itself. For example – method ‘isPresent‘ invoked on Optional …
