Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
If we're going to use a NoSQL DB for our app, then we want something fast and easy to use. We learn that "NoSQL" doesn't necessarily imply "no maintenance". We think about using managed hosting services like MongoDB's Atlas or Amazon's DynamoDB, but we choose to host it ourselves, whether on our premises or in our own cloud instance. We evaluate several NoSQL options including Redis and Cassandra and pick MongoDB. We may be able to get it installed by installing it from our Linux distribution, using Mongo’s repositories, or using a snap. But if something goes wrong, we might ... Read More
Both multiprocessors and multicomputers are the types of parallel computing systems. The basic difference between a multiprocessor and a multicomputer is that a multiprocessor is a single computer system containing multiple processors interconnected with the common I/O and memory devices, whereas a multicomputer is a system consists of several autonomous computers connected in a network and each computer has its own I/O and memory devices, and other computing resources. Read through this article to find out more about multiprocessors and multicomputers and how they are different from each other. What is Multiprocessor? A multiprocessor is a data processing system that ... Read More
Bash is a BourNeSh (Bourne Again ShEl) which is an improved variant oF thE origiNal Bourne shEll.It is used to run programs in the Bash programming language, and is often referred to as "the default shell" for Linux distributions. Sh is a simple commandinterpreter for the UNIX System V Release 4.0. Both Bash and sh can be used to write scripts in various languages such as Perl, Python, Ruby, PHP, Java, C++, JavaScript, Tcl, SQL, and others. sh #!/bin/sh bash #!/bin/bash Note A shell is an interface between the end-users and the operating systems. sh implements the ... Read More
Some software reads an entire input file into memory before processing it. If the input file contains a very long string, the software may crash if there isn't enough memory to hold the entire string. We’ll look at ways to change a single character in a very large one-liner file in Linux. Some applications cannot handle very large one-liners, so we’ll examine our options. Target File Some modern JavaScript frameworks compress all of the code onto a single statement. Let’s say we have a one-liner of JavaScript code called original.js with an error in it. It calls “fliter“ instead of ... Read More
Github is an online source code repository and hosting service for open-source projects, which provides the ability to host, version control, review, fork, and submit changes to any project hosted there. The following steps will help you download a tarball of your choice from github.com − By using git clone Download Git repository as a tar or zip file You can use either the command line tool "Github" (which is installed by default) or the GUI client "SourceTree". However, if you don't have these tools, you can download the source code in tar format and extract its contents ... Read More
A Linux command that you run from a terminal window can be built-in (a part of the system), a function (an application that runs when you enter certain commands), an alias (another name for a command), or an external executable (a program that you download). You can use the which, command, whereis, whatis, and type tools to determine what each one is and where they are located. We will look at the which, command, types, and whereis commands as they are usually found in most Linux-Based OSs. So let’s explore how to get the path of a Linux command in ... Read More
On almost every machine, the localhost and 127.0.0.1 are functionally the same. But, they are not exactly the same. This article is meant for explain the important differences between localhost and 127.0.01. What is Localhost? "localhost" is the machine name or IP address of the host server. You can think of it as the domain name for "127.0.0.1". The localhost allows a network connection to loop back on itself. It is a communication port that is connected to the local server. It helps us in spoofing the network connections when such a network does not exist. We tend to use ... Read More
An operating system acts as a bridge between the hardware and applications. The CPU is that part of the system which handles all the tasks of the system. Sometime such situations arise, when it is required to interrupt the currently running task and take a rapid action. Therefore, in operating system, there are two methods namely interrupt and polling for dealing with such events. In both interrupt and polling, the CPU is paused what it is doing and made to execute an essential task. Both interrupt and polling are quite different from each other in several ways. In this article, ... Read More
Both interlaced and progressive scan are types of raster scanning techniques extensively used in analog video systems. The basic difference between interlaced scan and progressive scan is that the interlaced scan employs the scanning of even and odd marked lines of a picture which are displayed consecutively as two isolated fields that are superimposed to show one frame on the screen, while the progressive scan employs a single sweep over the whole picture at a time. In this article, we will discuss the important differences between interlaced and progressive scan. Let's start with some basics of interlaced scan and progressive ... Read More
Fourier series is a branch of Fourier analysis of periodic signals. Fourier series splits a periodic signal into a sum of sines and cosines with different amplitudes and frequencies. Fourier series was introduced by a French mathematician Joseph Fourier. On the other hand, the Fourier Transform is a mathematical operation that decompose a signal into its constituent frequencies. The Fourier transform is also called frequency domain representation of a signal because it depends on the frequency of the signal. Read through this article to find out more about Fourier Series and Fourier Transform and how they are different from each ... Read More