Coditas Technologies Interview Questions, Process, and Tips

Q1. Flattening Json
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Q2. SQL Queries like window function and rank
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Q1. Create a DAG to execute python script parallely
Ans. 
Create a Directed Acyclic Graph (DAG) to execute Python scripts in parallel.
• Define tasks for each Python script to be executed in parallel

• Use a parallelism parameter to specify the number of tasks to run concurrently

• Set up dependencies between tasks to ensure proper execution order

• Use a DAG scheduler like Apache Airflow to manage and execute the DAG
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Q2. SQL Queries like window function
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Q1. Python code to find repeated numbers and their concurrency
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Python code to find repeated numbers and their concurrency
• Iterate through the array and use a dictionary to store the count of each number

• Iterate through the dictionary to find numbers with count greater than 1 and their concurrency
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Q2. SQL Joins and Optimization
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Q1. Project Worked on and brief overview
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Q2. Technologies worked on
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I have worked on a variety of technologies including Python, SQL, Hadoop, Spark, and AWS.
• Python

• SQL

• Hadoop

• Spark

• AWS
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Q3. Rate in skills out of 5
Ans. 
Rate in skills out of 5
• Programming: 5

• Data Analysis: 4

• Database Management: 4

• Machine Learning: 3
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Q1. What transformation done in project
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Q2. Explain explode function
Ans. 
Explode function is used to split a string into an array of strings based on a delimiter.
• The explode function takes in a delimiter and a string as input

• It splits the string into an array of strings based on the delimiter

• For example, explode(',', 'apple,banana,orange') would return ['apple', 'banana', 'orange']
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Q3. Python question to convert string to dictionary
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Q4. Spark coding question to flatten a Json
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Q5. Persist, cache and unpersist in pyspark
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Q1. Java script questions with example
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Q2. React native architecture
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Q1. Coding problem based on string manipulation
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Q2. React native questions
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The first round was group discussion; which was conducted by an institution referring candidates to the company. I was shortlisted.

The next round was also conducted by the company itself, and it was group discussion again, it went well. I believe there were around 12 candidates in one batch, and I was shortlisted. And I got the selection mail for the final technical interview, but then they call me and say I'm kept on hold and never contacted me.

Q1. I was kept on hold thus i never got the chance of attending the interview.
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Q1. Javascript and React basics.
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Q2. Todo list in reactjs
Ans. 
A todo list application built using ReactJS
• Use React components to create a form for adding new todos

• Store todos in state and map over them to display in a list

• Implement functionality to mark todos as complete and delete them

• Utilize CSS for styling and make the app responsive
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Q1. Sessions in MVC
Ans. 
Sessions in MVC are used to store user-specific data across multiple requests.
• Sessions are used to maintain state between HTTP requests in MVC applications.

• Session data is stored on the server and can be accessed by the client using a session ID.

• Sessions can be used to store user authentication information, shopping cart items, etc.
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Q2. Using keyword in C#
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Keywords in C# are reserved words that have special meaning and cannot be used as identifiers.
• Keywords are predefined and cannot be changed or redefined.

• Examples of keywords in C# include 'class', 'int', 'void', 'if', 'else', 'for', 'while', etc.

• Keywords are case-sensitive.
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