NetObjex Interview Questions and Answers

ACID properties ensure reliability and consistency in database transactions.

• ACID stands for Atomicity, Consistency, Isolation, and Durability.

• Atomicity ensures that a transaction is treated as a single, indivisible unit of work.

• Consistency ensures that a transaction brings the database from one valid state to another.

• Isolation ensures that concurrent transactions do not interfere with each other.

• Durability ensures that...read more

REST and GraphQL are both API architectural styles, but differ in terms of data fetching and flexibility.

• REST is a stateless, client-server communication model using HTTP methods.

• GraphQL is a query language and runtime for APIs, allowing clients to request specific data.

• REST has predefined endpoints and fixed data structures, while GraphQL offers flexible queries and responses.

• REST is better suited for simple, resource...read more

Sharding is a technique used in database systems to horizontally partition data across multiple servers for improved performance and scalability.

• Sharding involves dividing a large database into smaller, more manageable parts called shards.

• Each shard contains a subset of the data and is stored on a separate server.

• Sharding helps distribute the workload and allows for parallel processing of queries.

• It improves performanc...read more

A callback is a function that is passed as an argument to another function and is executed later when a certain event occurs.

• Callbacks are commonly used in asynchronous programming to handle the completion of a task.

• They allow for the separation of concerns and promote code reusability.

• An example is the use of callbacks in JavaScript's setTimeout() function.

Event loop is a mechanism that allows for efficient handling of multiple events in a single thread.

• Event loop is used in asynchronous programming to handle non-blocking I/O operations.

• It continuously checks for events in a queue and executes their associated callbacks.

• Event loop is commonly used in JavaScript for handling browser events and asynchronous tasks.

• It helps prevent blocking of the main thread and ensures res