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// mutates the current state -> setPhotos([...photos, photo]); // does not see the change // mutates the variable // no key

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What to do if a folder does not have read access during recursive traversal?

What is the difference between stocks and bonds?

package com.example.photogallery.controller; import com.example.photogallery.model.Photo; import com.example.photogallery.service.PhotoService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import org.springframework.web.multipart.MultipartFile; import java.util.ArrayList; import java.util.List; @RestController @RequestMapping("/api/photos") public class PhotoController { @Autowired private PhotoService photoService; private List<Photo> photos = new ArrayList<>(); private static Integer totalCount = 0; @GetMapping public List<Photo> getAllPhotos() { return photos; } @PostMapping("/upload") public String uploadPhoto(@RequestParam("file") MultipartFile file) { try { Photo photo = new Photo(); photo.setFileName(file.getOriginalFilename()); photo.setFileSize(file.getSize()); photo.setContentType(file.getContentType()); photos.add(photo); totalCount++; photoService.savePhoto(photo); return "Photo uploaded successfully"; } catch (Exception e) { return "Error uploading photo"; } } @GetMapping("/count") public Integer getCount() { return totalCount; } @DeleteMapping("/{id}") public void deletePhoto(@PathVariable Long id) { for (Photo photo : photos) { if (photo.getId().equals(id)) { photos.remove(photo); totalCount--; photoService.deletePhoto(id); break; } } } @GetMapping("/search") public List<Photo> searchPhotos(@RequestParam(required = false) String query) { if (query.isEmpty()) { return photos; } List<Photo> results = new ArrayList<>(); for (int i = 0; i < photos.size(); i++) { if (photos.get(i).getFileName().contains(query)) { results.add(photos.get(i)); } } return results; } }

Share your experience and role in recent projects, technology stack.

If two services want to write the same record to the database simultaneously, what will happen?

One of the services in the request chain stopped responding. How will you troubleshoot step by step?

What is a futures contract as a financial instrument?

Write a function FindFilesByExtension that recursively searches for files in a directory and returns a slice of absolute file paths ([]string) that meet the following conditions: file extension == targetExtension (case-insensitive) file size > minSizeKB The function should traverse all nested subdirectories. Example directory structure: /projects/ ├── doc.pdf (2048 KB) ├── report.docx (512 KB) ├── src/ │ ├── Main.go (2 KB) │ ├── Utils.go (5 KB) └── images/ └── photo.jpg (3072 KB) Check examples: files1, _ := FindFilesByExtension("/projects", "pdf", 1000) // files1 == []string{"/projects/doc.pdf"} files2, _ := FindFilesByExtension("/projects", "go", 3) // files2 == []string{"/projects/src/Utils.go"} files3, _ := FindFilesByExtension("/projects", "jpg", 2000) // files3 == []string{"/projects/images/photo.jpg"}

Naming conventions in Go — how should abbreviations be written?

If we find a directory during a recursive traversal, which path do we use?

What anti-patterns in microservice architecture do you know?