Objectives
What is java Annotation?
How Java Annotation helps development?
What are the types of annotation?
How to declare a custom annotation?
What are the Java built in annotations?
What are the relations between Spring framework to annotation?
What is Java Annotation?
Java annotation is meta-data of classes, methods, and fields. It carries additional information. But It doesn’t change semetics meaning of program. With the help of annotation, programmer do aspect of programming at runtime. Not only runtime, Annotation retention policy would...
Saturday, May 25, 2024
Saturday, April 20, 2024
It stands for Secure Socket Layer/Transport layer Security. It is encryption based internet security protocol which works on transport layer of OSI model. It was first developed by Netscape in 1995. After that some modification was made by IETF (Internet Engineering Task Force) and renamed as TLS. So SSL is direct predecessor of TLS, and both are logically same except some insignificant modification.
It prevents man in the middle (MITM) attack. The...
Saturday, November 25, 2023
Java can achieve callback paradigm using functional interface. It's
widely used in APIs. Java developer are fortunate to have these. Lets jump
into it.
First of all we have to know about what is callback function. According
to wikipedia:
In
computer programming, a callback or callback function is any reference to
executable code
that is passed as an
argument
to another piece of code; that code is expected to call back (execute) the
callback function as part of its job. This execution...
Sunday, November 5, 2023
AgendaWhat is Redis? Use cases and benefits of Redis?Why Redis is suitable for microservices apps?How Redis supports multiple data formats?Data persistence and Recovery with redis?How to optimize memory cost with Redis on Flash?Scaling Redis & High Availability across multiple geographic locations?
What is Redis? Use cases and benefits of Redis?It stands for Remote Dictionary Server. It stores data on computer’s memory (RAM). It is often used...
Friday, February 10, 2023
We are going to learn Linux Operating system. It will helps you to become Power user of Linux Operating system in your workplace. Let's get started.First lesson is divided into two parts: Basic Operating system navigation. 1. navigating from one directory to another 2. getting file information 3. removing files and directories. File and text manipulation 1. searching through your directories 2. find a specific file 3. copying and pasting 4. chaining commands Linux terminal has an interpreter who interpretes linux commands. This interprete...
Thursday, October 27, 2022
Any programming language has data types that can store data in memory e.g. primitive: integer, floating, string, reference variable: object variable, and more. Sometimes we want to convert one data type into another. So in a simple sentence, type casting is the way of assigning one data type value to another data type. In java language, it's very important to understand primitive type casting and reference or object variable type casting. Though...
Friday, June 17, 2022
OSPF stands for Open Shortest Path First. OSPFv2 is used along with IPv4 network layer protocol. But OSPFv3 is for IPv6.It is developed as an alternative distance vector algorithm (routing information protocol. abbreviation- RIP). Lets make clear concept about link state: Every router has multiple interfaces and each interface acts of a network segment and each of them is called a link of network. Network segment could be stub network, connected two routers etc. So Link-State refers the information of the state of link. A link-state info could...
Wednesday, June 1, 2022
NAT: Network Address Translation and PAT: Port Address TranslationTerms: NAT Pool: A container of Public IPv4 addresses maintained NAT-enabled router. NAT enabled router can pull one of the public IPv4 addresses from NAT Pool while translating from private IPv4 addresses to public addresses. Note: A NAT router typically operates at the border of a stub network; A stub network comprises one or more network with a single connection from neighboring network. NAT Terminalogy: - Inside local - Inside global - Outside local - Outside global Local...
Wednesday, May 25, 2022
What is ACL in OSI Network Layer? It stands for Access Control List and it is a packet filtering technique. It works in the same way as a router determines a route for an incoming packet. ACL is a sequential list of permits or denies statements and each statement is called Access Control Entry (ACE). What is Packet Filtering in terms of ACL??When network traffic passes through a router's interface which is configured with an ACL, that router takes the packet IP information and compares that information against each ACE, in sequential order,...
