10+ ECIL Interview Questions and Answers

I prioritize tasks, communicate with stakeholders, and adjust resources as needed to meet deadlines.

• Prioritize tasks based on importance and urgency

• Regularly communicate with stakeholders to provide updates and address any issues that may impact deadlines

• Adjust resources or seek help from team members if necessary to meet deadlines

Reverse a linked list

• Iterative approach using three pointers

• Recursive approach with base case and recursive call

• In-place reversal using stack

Designing Facebook involves creating a social networking platform with features like user profiles, news feed, messaging, and more.

• Create a user registration and login system

• Develop a news feed algorithm to display relevant content

• Implement a messaging system for users to communicate

• Design a user profile page with customizable options

• Incorporate features like groups, events, and pages

• Ensure scalability and security of the platform

Improving Front End System Performance

• Optimize images and reduce their size

• Minimize HTTP requests and use caching

• Use lazy loading for images and videos

• Reduce the number of DOM elements

• Use a Content Delivery Network (CDN)

• Minimize the use of external scripts and plugins

• Use asynchronous loading for scripts

• Optimize CSS and JavaScript files

• Use browser caching

• Implement server-side rendering

Event Loop is a mechanism that allows JavaScript to handle multiple tasks simultaneously.

• Event Loop is a part of JavaScript runtime that continuously checks the call stack and the task queue.

• It prioritizes the tasks in the queue and pushes them to the call stack when it's empty.

• This allows JavaScript to handle I/O operations and other asynchronous tasks without blocking the main thread.

• Example: setTimeout() function adds a task to the task queue and the Event Loop schedules i...read more

Data analysis is crucial for making informed decisions. Tokopedia's vast data provides a great opportunity for analysis. My bachelor's thesis focused on data-driven insights.

• Data allows for informed decision-making and insights.

• Tokopedia's extensive data provides a valuable opportunity for analysis.

• My bachelor's thesis delved into data-driven insights and analysis.

Coalesce is used to reduce the number of partitions in a DataFrame or RDD, while repartition is used to increase the number of partitions.

• Coalesce is a narrow transformation that can only decrease the number of partitions.

• Repartition is a wide transformation that can increase or decrease the number of partitions.

• Coalesce is preferred over repartition when reducing the number of partitions.

• Repartition shuffles the data across the cluster, which can be an expensive operation.

• Ex...read more

Failable initialisers are initialisers that can return nil instead of an instance of the class.

• Failable initialisers are denoted by placing a question mark after the init keyword.

• They are commonly used to handle invalid input or to fail gracefully.

• Example: init?(name: String) { if name.isEmpty { return nil } }

• Failable initialisers can be used with optional binding to safely unwrap the returned instance.

Design a chat application for real-time communication

• Use WebSocket for real-time communication

• Implement user authentication and authorization

• Include features like group chat, private messaging, and file sharing

• Design a responsive and user-friendly interface

• Ensure data security and privacy