Cloudely Interview Questions and Answers

Code for prime numbers 1 to 100 and SQL query.

• Use a loop to iterate through numbers 1 to 100.

• For each number, check if it is divisible by any number from 2 to itself-1.

• If not divisible, it is a prime number.

• SQL query: SELECT * FROM table_name WHERE number_column >= 1 AND number_column <= 100 AND is_prime = true;

wait, notify, and notifyAll are methods used for inter-thread communication in Java.

• wait() method causes the current thread to wait until another thread invokes the notify() or notifyAll() method for this object.

• notify() method wakes up a single thread that is waiting on this object's monitor.

• notifyAll() method wakes up all threads that are waiting on this object's monitor.

Controller is a general term for classes that handle requests in a web application, while RestController specifically handles RESTful requests.

• Controller is a general term for classes that handle requests in a web application

• RestController is a specialized type of controller that specifically handles RESTful requests

• RestController is annotated with @RestController, while Controller is annotated with @Controller

• RestController returns data directly in the response body, while C...read more

Heap is used for dynamic memory allocation, while stack is used for static memory allocation.

• Heap memory is used for storing objects and is managed by the JVM, while stack memory is used for storing method calls and local variables.

• Heap memory is larger in size compared to stack memory.

• Heap memory is accessed randomly, while stack memory is accessed in a LIFO (Last In First Out) manner.

• Examples: Objects created using the 'new' keyword are stored in the heap, while method call...read more

Lambda expression is a concise way to represent an anonymous function in Java.

• Lambda expressions are used to provide implementation of functional interfaces.

• They enable you to treat functionality as a method argument, or code as data.

• Syntax: (parameters) -> expression or (parameters) -> { statements; }

• Example: (int a, int b) -> a + b

Spring is a framework for building Java applications, while Spring Boot is a tool that simplifies the setup and configuration of Spring applications.

• Spring is a comprehensive framework for building Java applications, providing support for various modules like Spring MVC, Spring Security, and Spring Data.

• Spring Boot is an opinionated tool that simplifies the setup and configuration of Spring applications by providing defaults for dependencies and configurations.

• Spring Boot inc...read more