What methods are used to implement the Singleton pattern in code?.

The canonical answer to this question is that additional training and specialized courses help deepen knowledge and improve qualifications. For example:

• Courses on Java SE and Java EE (e.g., on Coursera, Udemy, Stepik).
• Oracle Certified Professional Java Programmer (OCPJP) certification.
• Courses on modern frameworks: Spring, Hibernate.
• Training on DevOps tools, if relevant to the role.
• Participating in online hackathons and practical projects.

It is important to mention specific course names and platforms if required, and describe what skills were gained.