Java

How is the first node in a linked list determined?

Which configuration will have priority: XML, Java, or annotations?

What is JavaServer Pages (JSP)?

@PutMapping("/create") public Book create(Map<String, Object> map) throws Exception { System.out.println("Check if book exists " + map); Book book = new ObjectMapper().convertValue(map, Book.class); Book b = repo.findByTitle(book.getTitle()); if (b != null) { throw new Exception("Book already exists"); } book.setId(UUID.randomUUID().toString()); repo.save(book); log.debug("Book {} by {} is created with id {}", book.getTitle(), book.getAuthor(), book.getId()); return book; } public BookStoreController(BooksRepository repo, Boolean bool, List<String> keys) { this.repo = repo; if (Boolean.TRUE.equals(bool)) { // check first key if(keys != null && !keys.isEmpty()){ String firstKey = keys.get(0); if (firstKey == "public") { for (String key : keys){ // ... some logic log.debug("Using key {}", key); }; } } } }

Is it allowed to have duplicate values within a Set collection?

Design a database schema for a cinema management system, considering information about halls, sessions, and seating.

What are the default equals and hashCode modifiers in Java?

How can a pessimistic locking mechanism be implemented to ensure data integrity in a multithreaded environment?

Middle — Middle+

AstonProoftechСБЕР+1

What is sorting?

What are constraints in SQL?

What is the difference between Mono and Flux in reactive programming?

What object-oriented programming principle do generics implement?

Who checked and evaluated the tasks assigned at your previous workplace?

Junior — Middle

Северсталь-Ифоком

Are there registered users in the current project?

How does the try-catch construct work in Java?

How should the data type be correctly updated in an existing database table?

Junior — Middle

Иннотех

Can you tell how tasks were assigned to you in your previous job and how it was done?

Junior — Middle

СБЕР

What does the '*' symbol mean in the SELECT statement when executing an SQL query?

What is the difference between well-formed XML and valid XML?

What is the purpose of the method for setting a value in an object?