BYJU'S Data Engineer Interview Questions and Answers

Q1. Question based on Window Functions in sql
Add your answer
Q2. Order of execution
Ans. 
Order of execution refers to the sequence in which operations are carried out in a program or system.
• Execution starts from the top of the program and moves downwards.

• Operations within parentheses are executed first.

• Multiplication and division are executed before addition and subtraction.

• Functions are executed when they are called.

• Control structures like loops and conditionals affect the order of execution.
Answered by AI
View 1 more answer

Q1. Write a sql query to find out different routes for a airline. Table has two columns which are destination and source
Ans. 
Use a SQL query to find different routes for an airline based on source and destination columns in a table.
• Use a SELECT statement to retrieve the distinct combinations of source and destination.

• Use the DISTINCT keyword to ensure only unique routes are returned.

• Order the results by source and destination for easier analysis.
Answered by AI
View 1 more answer
Q2. Situational questions based on Business KPI
Add your answer

Q1. Simple discussion on the role and company culture
Add your answer

Q1. Case study question
Add your answer

Q1. Basic Discussion on relocation and interest in joining the company.
Add your answer

Two dynamic programming challenges at the hard level on LeetCode and 10 medium-level SQL challenge.

Q1. Explain request lifecycle in rails?
Ans. 
Request lifecycle in Rails involves routing, controller actions, rendering views, and responding to the client.
• 1. Request comes in through the browser or API endpoint.

• 2. Rails router determines which controller and action to route the request to.

• 3. Controller action processes the request, interacts with the model, and prepares data for the view.

• 4. View template is rendered with the data from the controller.

• 5. Response ...read more
Answered by AI
Add your answer
Q2. Code Merge Sort using Ruby
Ans. 
Implement Merge Sort algorithm in Ruby
• Divide the array into two halves recursively

• Merge the sorted halves back together

• Use a helper method to merge the two halves
Answered by AI
Add your answer

Q1. Concepts of node and Js
Add your answer

Q1. How to manage and configure postfix mail server.
Ans. 
Postfix mail server can be managed and configured using configuration files and command line tools.
• Edit the main configuration file /etc/postfix/main.cf to make changes to the server settings

• Use postconf command to view or change configuration parameters

• Restart the postfix service after making changes for them to take effect

• Utilize tools like postmap to manage lookup tables for postfix

• Monitor mail server logs for troub
Answered by AI
Add your answer
Q2. OS go to maintenance mode, how to fix it.
Ans. 
To fix an OS in maintenance mode, reboot the system, check for any recent changes or updates, run diagnostics, and restore from a backup if necessary.
• Reboot the system to see if it resolves the issue

• Check for any recent changes or updates that may have caused the OS to go into maintenance mode

• Run diagnostics to identify any hardware or software issues

• Restore the OS from a backup if needed
Answered by AI
Add your answer

Q1. Basic Questions based on pervious project
Add your answer

Q1. Asked about myself
Add your answer
Q2. Said salary process is sometimes slow
Add your answer

Q1. Tell me about yourself
Add your answer
Q2. Coding Question
Add your answer

Q1. Tell me about yourself
Add your answer
Q2. Salary discussion
Add your answer