Tcg Digital Solutions Interview Questions and Answers

Classes are reference types while structs are value types.

• Classes support inheritance while structs do not.

• Classes have default access modifier as internal while structs have it as private.

• Classes have a destructor while structs do not.

• Classes are allocated on heap while structs are allocated on stack.

• Classes can be null while structs cannot.

A linked list is a data structure where each element points to the next one.

• Create a Node class with a value and a next pointer

• Create a LinkedList class with a head pointer and methods to add, remove, and traverse nodes

• Example: LinkedList ll = new LinkedList(); ll.add(5); ll.add(10); ll.remove(5);

Higher Order Component is a function that takes a component and returns a new component with additional functionality.

• Higher Order Components (HOCs) are a pattern in React for reusing component logic.

• They are functions that accept a component and return a new component with enhanced capabilities.

• HOCs can be used for cross-cutting concerns like authentication, logging, or data fetching.

• They enable code reuse, composition, and separation of concerns in React applications.

Virtual DOM is a concept in web development where a lightweight copy of the actual DOM is created and manipulated for efficient rendering.

• Virtual DOM is an abstraction of the real DOM.

• It is used in frameworks like React to improve performance.

• Changes made to the virtual DOM are compared with the actual DOM, and only the necessary updates are applied.

• This approach reduces the number of direct manipulations on the actual DOM, resulting in faster rendering.

• Virtual DOM allows dev...read more

Inorder tree traversal is a way of visiting each node in a binary tree in a specific order.

• Start at the leftmost node of the tree

• Visit the left subtree recursively

• Visit the current node

• Visit the right subtree recursively

Life Cycle Methods in React

• React components have several life cycle methods that are called at different stages of a component's life

• These methods allow developers to perform actions like initializing state, fetching data, and updating the UI

• Some commonly used life cycle methods are componentDidMount, componentDidUpdate, and componentWillUnmount

Dispatch Queue is a thread-safe way to execute tasks asynchronously, while Operations are a way to encapsulate tasks.

• Dispatch Queue is a high-level API for managing concurrent operations.

• Operations are objects that encapsulate a single task or multiple tasks.

• Dispatch Queue is simpler to use and recommended for most use cases.

• Operations provide more control over task dependencies and cancellation.

• Both can be used together to achieve complex concurrency scenarios.