Back-end

Beginner Level (0–1 Years) 1. What is the difference between `render` and `redirect_to` in Rails controllers? Answer: `render` displays a view template without changing the URL or starting a new request-response cycle. `redirect_to` sends an HTTP redirect response to the browser, initiating a new request and updating the URL. 2. How does Rails handle database […]

Beginner Level (0–1 Years) 1. What happens when you try to override a static method in Java? Answer: Static methods belong to the class, not the instance, so they cannot be overridden; they can only be hidden. Hiding means the method called depends on the reference type, not the object type. This is not true

Beginner Level (0–1 Years) 1. What is the output of the following code: echo 5 + “5 days”;? Answer: The output is 10. PHP performs type juggling in mathematical operations, converting the string “5 days” to the integer 5 by extracting the leading numeric part and ignoring the non-numeric part (” days”). Thus, 5 +

Beginner Level (0–1 Years) 1. What happens if you use a blocking operation like `fs.readFileSync()` in an API route handler? Answer: Using fs.readFileSync() in an API route handler pauses the program until the file is read, slowing down the app and preventing it from handling other requests. Node.js uses an event loop to manage tasks,

Beginner Level (0–1 Years) 1. Explain how the service container differs from the facade pattern in Laravel. What mistake do beginners often make when using facades? Answer: The service container is Laravel’s dependency injection system, managing class bindings and resolving instances at runtime via constructor or method injection. A facade provides a static interface to

Beginner Level (0–1 Years) 1. What is the output of bool(“False”) in Python? Answer: It returns True because any non-empty string is truthy, even the string “False”. 2. Explain the difference between is and == in Python. Answer: == checks for value equality, while is checks for identity (same memory location). 3. How do you