Aliens Group Interview Questions and Answers

MIS is a system that collects, processes, and presents information to support decision-making. Daily tasks are managed through organization, prioritization, and communication.

• Define the purpose and scope of the MIS to ensure it aligns with organizational goals

• Collect and input data from various sources to generate reports and analysis

• Use software tools such as spreadsheets, databases, and business intelligence systems to organize and analyze data

• Regularly review and update th...read more

public static use for accessing methods and variables without creating an object

• Allows access to methods and variables without creating an object

• Useful for utility classes where objects are not needed

• Can be used to create global variables or constants

• Example: Math class in Java has only static methods and constants

I use finance in my day to day life by budgeting, tracking expenses, investing, and making financial decisions.

• Creating and sticking to a monthly budget

• Tracking expenses and income to ensure financial stability

• Making investment decisions to grow wealth

• Analyzing financial options before making big purchases

Design is the art of visually communicating ideas and solving problems through creativity and innovation.

• Design is about creating visually appealing and functional solutions

• It involves understanding the target audience and their needs

• Design is a combination of creativity, problem-solving, and communication

• Examples: logos, websites, packaging, posters

Event Loop in JavaScript manages the execution of multiple tasks in a single-threaded environment.

• Event Loop is responsible for handling asynchronous operations in JavaScript.

• It continuously checks the call stack and the task queue, moving tasks from the queue to the stack when the stack is empty.

• Tasks like setTimeout, setInterval, and AJAX requests are handled by the Event Loop.

• Event Loop ensures that JavaScript remains non-blocking and responsive.

Sharding in Node.js involves splitting a database into smaller parts to improve performance and scalability.

• Sharding is a technique used to horizontally partition data across multiple servers or databases.

• It helps distribute the load evenly and improves performance by allowing parallel processing of queries.

• In Node.js, sharding can be implemented using libraries like MongoDB's sharding feature or custom sharding logic in code.

Indexing in Node.js is a way to optimize data retrieval by creating indexes on specific fields in a database.

• Indexing in Node.js can be done using libraries like Mongoose for MongoDB databases.

• Indexes can improve query performance by allowing the database to quickly locate the requested data.

• Example: Creating an index on a 'username' field in a user collection can speed up queries searching for a specific user.