However, good the frontend is, it is useless without the backbone, the backend. Backend development needs a lot of in-depth study of frameworks to make your task easy and work worthwhile. In this I will be talking about the backend frameworks that are best to use.
The internet cloud is full of unique tools whether you're building a simple restaurant reservations app or a software. The major PHP frameworks like Symfony or Laravel or even JS frameworks like Node.js and meteor may be your armory for building highly functional prototypes, but for high performance, the go to languages have always been Java, C++, Go, etc. since it gives them a performance overhead over the interpreted languages. The core of development that these languages hold is irreplaceable.
Sometimes we choose a language based on the unique circumstance in what role the server will play in our application. For example we might choose Node JS and Express framework on our server for an asynchronous ad server, or web socket based chat application. Or if it is an API to deliver math calculations back to a mobile application we might choose Python or R. Similarly to work on networking apps and deploy chat messenger type of programs, java is a powerful language.
Operating System Concepts:
Operating system is a program that controls both hardware and software on a device.
The major components are,
Few questions can be asked in interview
What is marshaling
Why paging is used
What is virtual memory
What is the difference between hard and soft real-time system.
What is multi-tasking, multi programming, multi-threading.
What is fragmentation? different types of it?
Railway Recruitment Boards are examining bodies in association with the Government of India to recruit new employees for Indian Railways Department. RRB comprises of 21 boards spread all over India.
RRB conducts the competitive examinations for various posts as –
RRB SSE|JE RRB ALP
RRB Group D
Every year millions of candidates appears in the railway exams to get selected as an government employee in railway department but only few gets chance to make their dreams come true.
Recently, the RRB had announced the notification for conducting RRB ALP and RRB Group D 2018 Exams.
There are 62905 vacancies for RRB Group D and 26502 for ALP and technicians.
If you wish to apply for the latest vacancies in railways, then be updated with every single notification announced by the board.
I hope it helps!
JEE Main and JEE Advanced are the gateways to get the admission in most reputed institutes of India.
Qualifying these two exams is the first step towards a solid engineering career.
Candidates who qualify in the JEE Main Exam with good rank will be eligible to appear in JEE Advanced Exam.
Its essential for an aspirant to clear the JEE Advanced Exam to be known as an IIT JEE qualified candidate.
JEE Advanced Exam will be far more difficult then JEE Main.
Aspirant should have to work hard to crack this exam.
Following are the basic details for JEE Advanced Exam –
Type of Exam – National Level Exam
Category – Undergraduate
Total Number of Candidates to get eligible for JEE Advanced – 2,24,000
Selection Procedure – Through JoSAA counselling on the basis of JEE Advanced Ranks.
Mode of Examination – Online Mode.
RRB SSE (Senior Section Engineer) is one of the most sought career option for all the graduate engineers who are seeking a job in Indian Railway.
The Railway Recruitment Board will soon announce the notification for conducting the RRB SSE 2018 Exam.
Candidates who wish to appear in this examination, must have top quality study material for preparation.
These study materials are – RRB SSE Books, RRB Previous Year Question Papers, Notes etc.
From all of these, having good books is the most essential thing to crack the RRB Exam.
Get the top books by clicking on the above-mentioned link and start preparing for RRB SSE 2018.
I Hope it helps!
Over the last year, the hottest topics in networking have been software-defined networking (SDN) and Network Virtualization (NV) but Software-defined networking (SDN) is still a relatively new model used to design, build, and manage networks but have gained tremendous momentum because at least six of the largest networks in the world like Google, Facebook, Verizon etc, are supporting it. So lets have a look what the SDNs are and their benefits.
Software-Defined Networking (SDN) is an emerging architecture that is dynamic, manageable, cost-effective, and adaptable, making it ideal for the high-bandwidth, dynamic nature of today’s applications.
Basically, software-defined network attempts to build a computer network by separating it into two systems.
The first system is the control plane which proivdes performace and fault mangement via net flow IP fix SNMP and other standard protocols. It typically handles cofiguration managament of the SDN compliant devices and understands the network topology loaded with these details. The controller can process connection requests based on desired requirement such as QoS levels. The controller can also perform link management between devices.
The second system is the data plane which is responsible for forwarding traffic to the selected destination. Switches can either be reliant on the controller to make forwarding decisions or make the decisions on their own. The control plane configures connection paths or flows into the data plane through the use of a control protocol.
The control protocol is used by the controller in a software-defined network to perform important functions such as connection setup. When a host attempts to communicate with another host over an SDN, the first packets from the client involved with the new flow are used to determine whether or not a forwarding decision can be made locally by the switch or if the switch needs to ask the controller what to do. If the switch determines that it must ask the controller, it will do so via a secure channel using the control protocol.
Software-Defined Networking helps organizations accelerate application deployment and delivery, dramatically reducing IT costs through policy-enabled work-flow automation by converging the management of network and application services into platforms that can automate the provisioning and configuration of the entire infrastructure.
Benefits of SDN:-
Inexpensive switches that have very little resident software and processing needs.
Centralization of the forwarding information base.
SDN dynamically respond to application requirements.
Optimization of utilization of the network without sacrificing service quality SDNs.
SDNs can filter packets as they enter the network and hence can act as simple firewalls at the edge of the network.
SDNs switches can redirect certain suspicious traffic flows to higher layer security controls such as IPS systems,
application firewalls and data loss prevention devices.
It can be used as a simple cost-effective load balancing device.
SDNs controllers can be clustered for fault tolerance and high availability.