If again these things repeat again will delete this channel seriously you guy's terrible waste everything

Told you all but you are all super busy fellows

Simple and easy to understand 😊😊 complete notes i will provide in pdf format like this in pdf or ppt format

BIT MANIPULATION

OPERATING SYSTEM

How do you decide which type of database to use?
.
.
There are hundreds or even thousands of databases available today, such as Oracle, MySQL, MariaDB, SQLite, PostgreSQL, Redis, ClickHouse, MongoDB, S3, Ceph, etc. How do you select the architecture for your system? My short summary is as follows:

🔹Relational database. Almost anything could be solved by them.
🔹In-memory store. Their speed and limited data size make them ideal for fast operations.
🔹Time-series database. Store and manage time-stamped data.
🔹Graph database. It is suitable for complex relationships between unstructured objects.
🔹Document store. They are good for large immutable data.
🔹Wide column store. They are usually used for big data, analytics, reporting, etc., which needs denormalized data.

👉 Over to you: Obviously, I did not cover every type of database. Is there anything else you often use, and why do you choose it?

System Design Article (01): 𝐂𝐚𝐜𝐡𝐢𝐧𝐠

𝐂𝐚𝐜𝐡𝐢𝐧𝐠 is one of the very important building blocks of designing any rebust system. It has been has been asked in many big tech giant companies' system design rounds including: #google #meta #amazon #microsoft #netflix etc...

In this article, I have covered very neat & clean everything about caching like:
✍️ 𝐂𝐚𝐜𝐡𝐢𝐧𝐠 𝐈𝐧𝐭𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧.
✍️ 𝐖𝐡𝐲 𝐰𝐞 𝐧𝐞𝐞𝐝 𝐜𝐚𝐜𝐡𝐢𝐧𝐠?
✍️ 𝐃𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭 𝐭𝐲𝐩𝐞𝐬 𝐨𝐟 𝐜𝐚𝐜𝐡𝐢𝐧𝐠 𝐭𝐞𝐜𝐡𝐧𝐢𝐪𝐮𝐞𝐬.
✍️ 𝐀𝐝𝐯𝐚𝐧𝐭𝐚𝐠𝐞𝐬 / 𝐃𝐢𝐬𝐚𝐝𝐯𝐚𝐧𝐭𝐚𝐠𝐞𝐬 𝐨𝐟 𝐞𝐚𝐜𝐡 𝐜𝐚𝐜𝐡𝐞 𝐭𝐲𝐩𝐞.

I hope you'll like it🤞 If you have any doubts or want to talk about this, please feel free to comment 💬

I have spent hours 🕑 preparing this article for you and want to help the maximum number of people. so kindly show your support by sharing this with your friends & connections 😊

One opening available for a good service based company (female candidates only ) package possibly near 2x then companies coming to Sathya

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Possible shift timings 2pm-11pm 1hr break so total 9 hours

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It started exactly the 10th day and we have some great openings for freshers only

We are for you but please don't make noise in coaching that we shared answers 😂😂 and please don't copy all answers copy just to pass not to surpass

Never give all answers correct to anyone only way to get selected in interviews

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Execute the restApi calls today in lab

principles of oops
what is abstraction
what is encapsulation
what is class
what is object
diff b/w this & super &super()
method vs constructors
inheritance
polymorphism
overloading
overriding
interface
abstract class
interface vs abstract class
diff b/w static polymorphism and dynamic polymorphism
string vs string builder vs string buffer
what is collection
exceptional handling

Q1.) What is a frameWork?
A1.)1. a frameWork is a collection of jar and war files.
2. it consists of reUsable components and libraries.
3. it is collection of classes and interfaces
4. it provides structure for writing programs

Q2.) Types of frameWork ?
A2.)1. Invasive FrameWork
a frameWork that forces you to implement or extend
2. Non-Invasive FrameWork
a frameWork that do-not force to implement or extend
eg:- struts , hibernate , spring

Q3.) What is IOC & IOC Lifecycle ?
A3.) it is a design pattern that allows program control to be inverted
or
transfer from traditional in-process control structure to separate service provider .

LifeCycle of IOC

1. Initialization :- IOC container is initialised and configured.
2. Binding :- Components are registered with container & can be specifying interfaces .
3. Resolution :- Dependencies of the components are resolved and the appropriate instance is created
4. Invocation :- Container invokes specific methods of the components.
5. Destruction :- Component destroyed & restore released

Q4.) What is SingleTon class and Rules to create class ?
A4.) A class that is limited to one instance of itself
this means only one object of the class can be created
Most common use of this class is to provide global access to objects

RULES of Singleton class

1. class must be declared Private
2. private constructor
3. static variables of same type
4. public static method must return instance of class

Q5.) What is dependency Injection and Types
A5.) a class receives instances of object it depends upon external
source rather than creating them itself .
this allows class to be independent of how the object
it depends on are created & makes code easier to maintain test

Rules of DI

1. Constructor-based Dependency Injection:- in this dependent object is provided
as the parameter in the constructor of class .
it is provided when class is instantiated.

2. Setter-based Dependency Injection :- dependent object is provided in class through setter methods
this is useful when dependency is optional or when it can be changed even after class is instantiated

3. Interface-based Dependency Injection :- defined some methods that must be implemented by dependent objects
this is useful when class needs to be decoupled from dependent objects
allowing it into different implementations of dependent objects

4. Autowiring Dependency Injection :- this injection in spring
framework enables you to inject the object dependency implicitly.
It internally uses setter or constructor injection.

Autowiring can't be used to inject primitive and string values. It works with reference only.

Q6.) types of bean configuration technique in java

1. XML Based Configuration: This is the most common and popular way of configuring the Spring beans. The beans are configured using the XML file, which contains all the bean definitions.

2. Annotation Based Configuration: This type of configuration allows you to create beans using annotations. You don’t need to create an XML file for the beans.

3. Java Based Configuration: This type of configuration uses pure Java classes to configure the beans. The beans are configured using the @Bean annotation.

Q7.) What is Annotation and use of annotation?
A7.) a form of metaData , A way to provide additional information about a program construct without changing the program itself it can be used to provide information about class, methods or field specifying code generation or compilation instruction or providing external metadata from XML.
it allows developers to add custom information to their code without modifying the code itself , making it easier to keep track of important information .
this is useful when working on large code base or when trying to keep track of changes overtime .

Q8.) What is Auto-Wiring?
A8.) it enables frameWork to inject dependency into beans

autom