TechTree IT Systems interview questions

1. Tell me about yourself. 2. What is Query? 3. What is multi-Threading in Spring Boot? 4. Program: find the longest prefix from the string array String str = { 'flower', 'fly', 'flew '} 5. What annotation is used in an exception? 6.I want to upload multiple files, and I got an error. How can you handle?

Started with the introduction, then we talk about my projects. How you implement this project? OOPs concepts like abstraction, encapsulation, types of inheritance, interface. Difference between abstraction and interface. Different types of access modifiers. One Simple DSA question on Array - Find the 2nd smallest number in array