Spring

Question 1

What is Spring

Answer 1

A framework for enterprise Java applications

Question 2

What are Springs benefits

Answer 2

IoC, DI, MVC, Boilerplate Reduction

Question 3

What are some spring sub projects

Answer 3

Core - Inversion of Control, DepInjectoin
Web - Provides Application Context
JDBC-Provides DB classes like JDBC Template
MVC - Model View Controller
ORM - JPA, JDO, Hibernate
DI - Describe how to create objects

Question 4

How to inject beans

Answer 4

Setter, Constructor, Field

Question 5

BeanFactory

Answer 5

An interface representing the container of all bean instances

Question 6

ApplicationContext

Answer 6

A container that holds all metadata, data, and beans of the application

Question 7

Bean

Answer 7

A POJO Initialized by Spring

Question 8

Default Bean Scope

Answer 8

Singleton

Question 9

Are Beans Thread Safe

Answer 9

Not if Singleton

Question 10

What is Java Config used for?

Answer 10

Configuring the Spring application instead of using xml

Question 11

Can you have more than one config file for spring?

Answer 11

Yes.

Question 12

What is Spring Security

Answer 12

A module that provides authentication methods

Question 13

Spring Boot

Answer 13

A preconfigured project to cut boilerplate. Like create-react-app.

Question 14

Spring Prototype Pattern

Answer 14

Used to generate multiple instances of a bean.

Question 15

@RequestMapping

Answer 15

Used to tie an http request to a method.

Question 16

What is the config file for your db. It describes the datasource.

Answer 16

JDBC Template

Question 17

What is Aspect Oriented Programming?

Answer 17

Aspect Oriented Programming when a regex (PointCut) matches the variable (JoinPoint) being evaluated, then a method (Advice) is executed.

Question 18

What is Weaving

Answer 18

The process spring uses to tie aspects to objects.

Question 19

What coding paradigm uses events to horizontally scale?

Answer 19

Reactive Programming - Analogous to microservices, the concept of using events to scale your classes.

Question 20

How does spring 5 work with java 9?

Answer 20

Spring 5 and java 9: Everything is modularized. A module is a level above packages. Analogous to container classes in react and angular modules.

Question 21

What is a conditional

Answer 21

Used to specify the order of bean instantiation. E.g. if Bean A requires bean B to be loaded, you can ensure that B is instantiated before A.