안녕하세요 5월부터 시작하는 수업에서BM (광고, 결제) 시스템과 서버 기본기 구현을 배우게 되는것으로 알고있는데요!이과정에서 c#과 AWS를 사용하여 직접 서버를 구축하는 방법을 배우는것인지아니면 파이어베이스나 뒤끝같은 관리형 서비스를 사용하는 방법을 배우는건지 궁금합니다 !

Introduction:The United Kingdom's logistics industry has undergone a significant transformation in recent years, marked by the rise of advanced transport services. This article delves into the intricacies of transport services UK, emphasizing the evolution of full truck load services and container transportation services. Understanding the nuances of Full Container Haulage Services in the UK is crucial for businesses seeking efficient and reliable logistics solutions.The Dynamics of Transport Services in the UK:Transport services in the UK play a pivotal role in facilitating the movement of goods across the country. As businesses strive for efficiency, the demand for advanced logistics solutions, including full truck load services and container transportation services, has surged.The Evolution of Full Truck Load Services:Full truck load services have evolved to meet the growing demands of businesses. These services involve transporting a dedicated truckload of goods from one location to another, ensuring optimal utilization of resources and timely deliveries. Businesses benefit from the flexibility and cost-effectiveness offered by full truck load services.Container Transportation Services: A Critical Component:Container transportation services have become a critical component of modern logistics. These services involve the movement of goods in standardized containers, enhancing security and streamlining the loading and unloading processes. The versatility of container transportation services makes them ideal for various industries.Full Container Haulage Services in the UK – Bridging Gaps:Full Container Haulage Services in the UK have emerged as a bridge between manufacturers, suppliers, and end consumers. These services ensure the seamless transportation of fully loaded containers, optimizing supply chain efficiency and reducing transit times.Cost-Effective Solutions for Businesses:Businesses are increasingly turning to full truck load services and container transportation services in the UK for their cost-effective nature. By maximizing the capacity of each shipment, companies can reduce transportation costs and enhance overall operational efficiency.Efficiency in Supply Chain Management:Efficiency in supply chain management is a key driver for the adoption of advanced transport services. Full truck load services and container transportation services contribute to a streamlined supply chain, minimizing delays and improving overall productivity.Technological Advancements in Transport Services:The integration of technology has significantly enhanced the effectiveness of transport services in the UK. GPS tracking, real-time monitoring, and route optimization are just a few examples of how technology is revolutionizing the logistics landscape, making full truck load and container transportation services more reliable than ever.Environmental Considerations in Logistics:The focus on sustainability has prompted a shift towards environmentally friendly transport services. Companies are exploring greener alternatives in full truck load and container transportation services, aligning with global efforts to reduce the carbon footprint of the logistics industry.Global Connectivity through Container Transportation:Container transportation services play a vital role in establishing global connectivity. The standardized containers used in these services facilitate seamless intermodal transportation, connecting the UK to international markets and fostering economic growth.The Role of Regulations in Transport Services:Regulations governing transport services in the UK have a significant impact on the industry. Compliance with safety standards, weight restrictions, and environmental regulations is essential for businesses offering full truck load and container transportation services.Challenges and Solutions in Full Container Haulage Services:While Full Container Haulage Services in the UK offer numerous advantages, they are not without challenges. Issues such as port congestion, customs delays, and infrastructure limitations pose obstacles that require innovative solutions to ensure smooth operations.Collaboration in the Logistics Ecosystem:Collaboration is key in the logistics ecosystem. Businesses providing full truck load and container transportation services must collaborate with suppliers, manufacturers, and other stakeholders to create a cohesive and efficient supply chain network.Technology-Driven Warehousing in Transport Services:Warehousing is an integral part of transport services, and technological advancements have transformed traditional warehouses into smart, tech-driven hubs. Automation, robotics, and data analytics optimize storage, retrieval, and distribution processes, complementing full truck load and container transportation services.The Future of Transport Services in the UK:As technology continues to evolve, the future of transport services in the UK looks promising. Innovations such as autonomous vehicles, blockchain for supply chain transparency, and sustainable fuel alternatives are likely to shape the next phase of full truck load and container transportation services.Navigating the Landscape of Transport Services:In conclusion, the landscape of transport services in the UK is undergoing a paradigm shift. Businesses must adapt to the changing dynamics by embracing full truck load and container transportation services, leveraging technology, and fostering collaborative relationships to thrive in the evolving logistics industry.

제가 이해한것이 맞는지 확인하고 싶어 질문을 남기게 되었습니다. Event는 Signal, Non-Signal 상태를 WaitForSingleObject(handle, INFINITE)를 통해 대기합니다.여기서 INFINITE로 무한정 대기를 통해 불필요한 컨텍스트 스위치가 일어나지 않게 됩니다.하지만 그만큼 자원(메모리? CPU? )의 손해가 일어나기에 생겨난 것이 Conditional Variable입니다. Conditional Variable cv.notify_one();를 통해 대기하고 있던 Thread를 실행합니다. Conditional Variable는 메모리에 Thread를 Wait 시키지 않고 대기 시키다가 cv.notify_one();를 통해 실행하는 것이고 Event는 Thread를 메모리에 WaitForSingleObject(handle, INFINITE)를 통해 대기시켰다가 SetEvent(handle);를 통해 실행시킨 점이 차이라고 이해하면 될지 여쭙고 싶습니다.  

안녕하세요. 강의에서 타이핑 하신 Example Source를 제공받을 수 있을까요?    

안녕하세요..! 또 질문을 드려서 너무 죄송합니다.authorized_keys에 제가 만든 public 키를 추가를 해줬는데 터미널로 접속하려고 하니까 아래와 같이 접속이 거부됩니다..! 혹시나 키를 잘못 기입했나 해서 다시 복사해서 넣었는데도 저렇게 거부가 되는데 다른 이유가 있을까요?너무 죄송합니다..!!답변주시면 정말 감사드리겠습니다!

영상 3분 47초쯤에//shallow copy with Object.assign()부분에서 bArray와 cArray를 비교하는데, 참조하는 위치가 달라서 같지 않다고 false를 반환합니다. shallow copy가 주소값만을 복사하고 deep copy가 값을 하나하나 복사하려 독립적인 메모리를 차지하는 것으로 알고 있는데, 어느 부분에서 잘못 이해한 건가요?ㅜㅜ

[질문 템플릿]1. 강의 내용과 관련된 질문인가요? 예2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? 예3. 질문 잘하기 메뉴얼을 읽어보셨나요? 예[질문 내용]저는 실행 결과가 왜 깔끔하게 나오지 않는지 알려주세요..!

상속 받은 엔티티는 @Builder를 사용하는게 아니라, 다음과 같이 @SuperBuilder로 자식, 부모 엔티티 모두에 선언해줘야 한다고 합니다.<Book 엔티티>package jpabook.jpashop.domain.item; import jakarta.persistence.DiscriminatorValue; import jakarta.persistence.Entity; import lombok.*; import lombok.experimental.SuperBuilder; @Entity @DiscriminatorValue("B") @Getter @SuperBuilder @AllArgsConstructor @NoArgsConstructor public class Book extends Item { private String isbn; private String author; }<Item 엔티티>package jpabook.jpashop.domain.item; import jakarta.persistence.*; import jpabook.jpashop.domain.Category; import jpabook.jpashop.exception.NotEnoughStockException; import lombok.AllArgsConstructor; import lombok.Getter; import lombok.NoArgsConstructor; import lombok.Setter; import lombok.experimental.SuperBuilder; import java.util.ArrayList; import java.util.List; @Entity @Getter @SuperBuilder @AllArgsConstructor @NoArgsConstructor @Inheritance(strategy = InheritanceType.SINGLE_TABLE) public class Item{ @Id @GeneratedValue @Column(name = "ITEM_ID") private Long id; private String name; private int price; private int stockQuantity; @ManyToMany(mappedBy = "items") private List<Category> categories = new ArrayList<>(); /*비즈니스 로직*/ //todo: stock 증가 public void addStock(int quantity) { this.stockQuantity += quantity; } //todo: stock 감소 public void removeStock(int quantity) { int restStock = this.stockQuantity - quantity; if (restStock < 0) { throw new NotEnoughStockException("need more stock"); } this.stockQuantity = restStock; } } <ItemController 클래스>package jpabook.jpashop.controller; import jakarta.validation.Valid; import jpabook.jpashop.domain.item.Book; import jpabook.jpashop.service.ItemService; import lombok.RequiredArgsConstructor; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.PostMapping; @Controller @RequiredArgsConstructor public class ItemController { private final ItemService itemService; @GetMapping("/items/new") public String createForm(Model model) { model.addAttribute("form", new BookForm()); return "items/createItemForm"; } @PostMapping("/items/new") public String create(@Valid @ModelAttribute("form") BookForm form, BindingResult result) { if (result.hasErrors()) { return "items/createItemForm"; } Book book = createBook(form); itemService.saveItem(book); return "redirect:/"; } //todo: dto 정보를 받아서 엔티티를 만드는 단순 작업은 컨트롤러에서 처리 private Book createBook(BookForm form) { return Book.builder() .name(form.getName()) .price(form.getPrice()) .stockQuantity(form.getStockQuantity()) .author(form.getAuthor()) .isbn(form.getIsbn()) .build(); } }이렇게 하고, Jpashop의 상품등록에 들어가서 데이터를 입력하면 정상적으로 DB에 데이터가 저장됩니다. 

1월 22, 2024 11:47:46 오후 org.hibernate.jpa.internal.util.LogHelper logPersistenceUnitInformationINFO: HHH000204: Processing PersistenceUnitInfo [name: hello]1월 22, 2024 11:47:46 오후 org.hibernate.Version logVersionINFO: HHH000412: Hibernate ORM core version 6.4.2.Final1월 22, 2024 11:47:46 오후 org.hibernate.cache.internal.RegionFactoryInitiator initiateServiceINFO: HHH000026: Second-level cache disabled1월 22, 2024 11:47:47 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configureWARN: HHH10001002: Using built-in connection pool (not intended for production use)1월 22, 2024 11:47:47 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreatorINFO: HHH10001005: Loaded JDBC driver class: org.h2.Driver1월 22, 2024 11:47:47 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreatorINFO: HHH10001012: Connecting with JDBC URL [jdbc:h2:tcp://localhost/~/test]1월 22, 2024 11:47:47 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreatorINFO: HHH10001001: Connection properties: {password=****, user=sa}1월 22, 2024 11:47:47 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreatorINFO: HHH10001003: Autocommit mode: false1월 22, 2024 11:47:47 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections <init>INFO: HHH10001115: Connection pool size: 20 (min=1)1월 22, 2024 11:47:47 오후 org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl constructDialectWARN: HHH90000025: H2Dialect does not need to be specified explicitly using 'hibernate.dialect' (remove the property setting and it will be selected by default)1월 22, 2024 11:47:47 오후 org.hibernate.engine.transaction.jta.platform.internal.JtaPlatformInitiator initiateServiceINFO: HHH000489: No JTA platform available (set 'hibernate.transaction.jta.platform' to enable JTA platform integration)1월 22, 2024 11:47:47 오후 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PoolState stopINFO: HHH10001008: Cleaning up connection pool [jdbc:h2:tcp://localhost/~/test] 코드는 프로젝트 초기 설정 소스 코드 그대로 실행했는데 안됩니다...

로컬에서 테스트로 브라우저 실행하는 방법이 궁금합니다~!

http://boj.kr/01660705b14346a68f903e9c57b3553b처음에 설명하신 String을 접근하는 방법과 cmp를 만드는 것 까지 접근했으나 계속 틀렸다고 나옵니다 ㅠㅠ한번 살펴봐주시면 감사하겠습니다!

[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]영한님 수업 잘 따라오면서 나머지 강의들은 잘 프로그램이 작동했는데 HTTP요청 데이터 -API 메시지 바디 -JSON강의 실습이후 json요청 페이지에서만 오류가 뜨고 localhost8080에서는 백지 화면이 뜹니다 제가 무지해 혹시 오류가 따로 있을거같아 컴파일보드 메모장으로 첨부해봅니다.. 오후 11:15:43: Executing ':ServletApplication.main()'... > Task :compileJava UP-TO-DATE > Task :processResources UP-TO-DATE > Task :classes UP-TO-DATE > Task :ServletApplication.main() . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v3.2.2) 2024-01-22T23:15:44.017+09:00 INFO 4424 --- [ main] hello.servlet.ServletApplication : Starting ServletApplication using Java 21.0.1 with PID 4424 (C:\Users\�赿��\Desktop\Spring-mvc\servlet\build\classes\java\main started by �赿�� in C:\Users\�赿��\Desktop\Spring-mvc\servlet) 2024-01-22T23:15:44.018+09:00 INFO 4424 --- [ main] hello.servlet.ServletApplication : No active profile set, falling back to 1 default profile: "default" 2024-01-22T23:15:44.667+09:00 INFO 4424 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http) 2024-01-22T23:15:44.676+09:00 INFO 4424 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2024-01-22T23:15:44.677+09:00 INFO 4424 --- [ main] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.18] 2024-01-22T23:15:44.711+09:00 INFO 4424 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2024-01-22T23:15:44.712+09:00 INFO 4424 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 652 ms 2024-01-22T23:15:44.787+09:00 INFO 4424 --- [ main] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page: ServletContext resource [/index.html] 2024-01-22T23:15:44.968+09:00 INFO 4424 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port 8080 (http) with context path '' 2024-01-22T23:15:44.973+09:00 INFO 4424 --- [ main] hello.servlet.ServletApplication : Started ServletApplication in 1.2 seconds (process running for 1.426) 2024-01-22T23:15:49.563+09:00 DEBUG 4424 --- [nio-8080-exec-1] o.a.coyote.http11.Http11InputBuffer : Before fill(): parsingHeader: [true], parsingRequestLine: [true], parsingRequestLinePhase: [0], parsingRequestLineStart: [0], byteBuffer.position(): [0], byteBuffer.limit(): [0], end: [0] 2024-01-22T23:15:49.564+09:00 DEBUG 4424 --- [nio-8080-exec-1] o.a.coyote.http11.Http11InputBuffer : Received [GET / HTTP/1.1 Host: localhost:8080 Connection: keep-alive Cache-Control: max-age=0 sec-ch-ua: "Not_A Brand";v="8", "Chromium";v="120", "Google Chrome";v="120" sec-ch-ua-mobile: ?0 sec-ch-ua-platform: "Windows" Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7 Sec-Fetch-Site: none Sec-Fetch-Mode: navigate Sec-Fetch-User: ?1 Sec-Fetch-Dest: document Accept-Encoding: gzip, deflate, br Accept-Language: ko-KR,ko;q=0.9,en-US;q=0.8,en;q=0.7 ] [��ü �Ķ���� ��ȸ] - start [��ü �Ķ���� ��ȸ] - end 2024-01-22T23:15:49.582+09:00 DEBUG 4424 --- [nio-8080-exec-1] o.a.coyote.http11.Http11InputBuffer : Before fill(): parsingHeader: [true], parsingRequestLine: [true], parsingRequestLinePhase: [0], parsingRequestLineStart: [0], byteBuffer.position(): [0], byteBuffer.limit(): [0], end: [704] 2024-01-22T23:15:49.582+09:00 DEBUG 4424 --- [nio-8080-exec-1] o.a.coyote.http11.Http11InputBuffer : Received [] 2024-01-22T23:15:49.583+09:00 DEBUG 4424 --- [nio-8080-exec-1] o.apache.coyote.http11.Http11Processor : Socket: [org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@41b5971e:org.apache.tomcat.util.net.NioChannel@8c53d83:java.nio.channels.SocketChannel[connected local=/[0:0:0:0:0:0:0:1]:8080 remote=/[0:0:0:0:0:0:0:1]:51861]], Status in: [OPEN_READ], State out: [OPEN] 2024-01-22T23:15:49.598+09:00 DEBUG 4424 --- [nio-8080-exec-3] o.a.coyote.http11.Http11InputBuffer : Before fill(): parsingHeader: [true], parsingRequestLine: [true], parsingRequestLinePhase: [0], parsingRequestLineStart: [0], byteBuffer.position(): [0], byteBuffer.limit(): [0], end: [704] 2024-01-22T23:15:49.599+09:00 DEBUG 4424 --- [nio-8080-exec-3] o.a.coyote.http11.Http11InputBuffer : Received [GET /favicon.ico HTTP/1.1 Host: localhost:8080 Connection: keep-alive sec-ch-ua: "Not_A Brand";v="8", "Chromium";v="120", "Google Chrome";v="120" sec-ch-ua-mobile: ?0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 sec-ch-ua-platform: "Windows" Accept: image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8 Sec-Fetch-Site: same-origin Sec-Fetch-Mode: no-cors Sec-Fetch-Dest: image Referer: http://localhost:8080/ Accept-Encoding: gzip, deflate, br Accept-Language: ko-KR,ko;q=0.9,en-US;q=0.8,en;q=0.7 ] [��ü �Ķ���� ��ȸ] - start [��ü �Ķ���� ��ȸ] - end 2024-01-22T23:15:49.601+09:00 DEBUG 4424 --- [nio-8080-exec-3] o.a.coyote.http11.Http11InputBuffer : Before fill(): parsingHeader: [true], parsingRequestLine: [true], parsingRequestLinePhase: [0], parsingRequestLineStart: [0], byteBuffer.position(): [0], byteBuffer.limit(): [0], end: [604] 2024-01-22T23:15:49.601+09:00 DEBUG 4424 --- [nio-8080-exec-3] o.a.coyote.http11.Http11InputBuffer : Received [] 2024-01-22T23:15:49.601+09:00 DEBUG 4424 --- [nio-8080-exec-3] o.apache.coyote.http11.Http11Processor : Socket: [org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@41b5971e:org.apache.tomcat.util.net.NioChannel@8c53d83:java.nio.channels.SocketChannel[connected local=/[0:0:0:0:0:0:0:1]:8080 remote=/[0:0:0:0:0:0:0:1]:51861]], Status in: [OPEN_READ], State out: [OPEN]

안녕하세요. 강의 잘 보고 잘 따라가고 있습니다! 우선 좋은 강의 제공해주셔서 감사 인사 드립니다!AWS lightsail 부분 수강하고 있는 와중에 workflows 내용에 대한 질문이 생겼습니다.여기 내용을 보면 npm 설치와 redis 설치가 포함되어있는데 저렇게 설치를 하는 곳은 가상 ubuntu 서버에 하는 거라고 보면 될까요? 이미 AWS lightsail 서버에는 node와 npm 및 redis 설치를 다 끝냈는데 매번 pull request 할 때마다 다시 설치가 되는건가 궁금합니다!같은 맥락으로 도커 이미지를 나중에 만들어서 빌드를 하게 된다면 매번 수정된 내용이 반영되는 이미지를 다시 만들어서 그 이미지를 빌드해서 배포를 하는 건가요? 질문은 이 정도로 마치겠습니다! 긴 질문 읽어주셔서 감사합니다.

이 함수를 이용하려면 TargetDataHandle을 넣도록 되어 있는데요.그래서 Trace 어빌리티 테스크를 통해 전달받은 데이터를 사용한 것 같습니다.그런데 다른 방식으로 타겟을 정하거나 수동으로 ApplyGameplayEffectSpectToTarget()를 사용하려면FGameplayAbilityTargetDataHandle을 억지로 만들어 채워야 하나요??

int a = 10; System.out.println(a); // 10 a = 50; System.out.println(a); // 50이 코드에서 a에 50이 할당될 때 10은 메모리에서 삭제된다는 의미인가요?그러면 이 재할당이 될 때 jvm 내의 가비지 컬렉터가 작동해서 메모리를 수거해 가는 것이라고 이해하면 되는 것인지 궁금해서 질문 남깁니다! 

  저는 저렇게 나오지 않습니다.자동완성이 안되어서 그냥적었는데 다음과 같에 에러가 발생 했어요.

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]2:48분쯤에 버그가 일어났을 때 실무에서는 데이터베이스의 데이터를 복구할 때 다시 버그가 일어난 시점으로 데이터베이스를 다시 되돌릴 수 있나요? 롤백기능같은걸 실무에서 쓰는지 강의를 듣다가 궁금해서 질문해봅니다!

연결리스트 삭제 시 헤드노드가 NULL인 경우를 고려해야 하는 이유가 궁금합니다. 삭제 전에 삭제할 노드를 미리 찾는 과정이 수반되는데, 그 과정은 헤드노드가 NULL값이 아니라는 것을 전제로 이루어집니다.   따라서 삭제할 노드를 찾아서 삭제를 진행하는 단계까지 왔다는 것은 헤드노드가 NULL이 아니라는 것을 전제로 한다고 볼 수 있습니다. 그럼에도 불구하고 삭제를 진행하는 함수에서 헤드노드가 NULL인 경우를 고려하시고 이에 대한 예외처리 코드를 작성하셨는데, 혹시 그에 대한 이유가 있을까요?

강의 2분에 서버쪽에서 쿼리 가져오는게 좋은 상황이 검색 노출이 될 때 라고 하셨는데, SEO 이외에 다른 장점은 없나요? 서버사이드가 속도가 더 빠르지 않을까 라고 생각을 하고 있었습니다.

안녕하세요!! 저는 UserLoaHistoryRepository에 existsByBookNameAndIsReturn이렇게 메소드를 만들어도 bean 에러가 나네요,, 이유가 뭘까요!! 선생님