Telstra Data Engineering Analyst Interview Questions and Answers

Q1. What is your roles and responsibilities ?
Ans. 
As a Business Analyst, I bridge the gap between stakeholders and IT, ensuring project requirements are met effectively.
• Gather and analyze business requirements from stakeholders, e.g., conducting interviews and workshops.

• Create detailed documentation, such as business requirement documents (BRDs) and functional specifications.

• Facilitate communication between technical teams and business units to ensure alignment on pro...read more
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Q2. How do you manage stakeholders ?
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Effective stakeholder management involves communication, understanding needs, and building relationships for project success.
• Identify stakeholders: Map out all stakeholders involved in the project, such as clients, team members, and executives.

• Understand their needs: Conduct interviews or surveys to gather insights on their expectations and concerns.

• Regular communication: Schedule regular updates through meetings or re...read more
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Q3. What is your techniques for requirement gathering?
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Effective requirement gathering involves various techniques to ensure comprehensive understanding of stakeholder needs.
• Interviews: Conduct one-on-one sessions with stakeholders to gather detailed insights. For example, interviewing doctors to understand patient management systems.

• Surveys and Questionnaires: Distribute structured forms to collect quantitative data from a larger audience. For instance, using surveys to a...read more
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Q1. About yourself and roles
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Q2. Network domain check skills
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Q1. Tell me about yourself
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I am a detail-oriented business analyst with a strong background in data analysis and problem-solving.
• Experienced in gathering and analyzing business requirements

• Skilled in creating detailed reports and presentations

• Proficient in using data visualization tools like Tableau

• Strong communication and interpersonal skills

• Certified in Agile methodologies
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Q2. Us healthcare provider patient
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Q1. Scenariop based question us
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Q2. Sdlc lifecycle and phases
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Q1. Sql question related to windows function
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Q2. Unix basics - find a word in a set of files
Ans. 
Using Unix command 'grep' to find a word in a set of files
• Use 'grep' command followed by the word you want to search for and the file(s) you want to search in

• Add the '-r' flag to search recursively in all files in a directory

• Use '-i' flag for case-insensitive search

• Example: grep 'hello' file.txt

• Example: grep -r 'error' /path/to/directory

• Example: grep -i 'apple' file1.txt file2.txt
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Q3. Python question related to file system, regex
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Q1. What is the difference between start schema and snowflake schema
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Star schema is a denormalized schema with a single fact table and multiple dimension tables, while snowflake schema is a normalized schema with multiple dimension tables normalized into sub-dimension tables.
• Star schema has a single fact table surrounded by multiple dimension tables, while snowflake schema has dimension tables normalized into sub-dimension tables.

• In star schema, dimensions are denormalized, while in sno...read more
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Q2. How do you load data into bigquery using dataflow
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Data can be loaded into BigQuery using Dataflow by creating a pipeline in Dataflow that reads data from a source and writes it to BigQuery.
• Create a Dataflow pipeline using Apache Beam SDK

• Read data from a source such as Cloud Storage or Pub/Sub

• Transform the data as needed using Apache Beam transformations

• Write the transformed data to BigQuery using BigQueryIO.write()
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Q1. Questions on spark and kafka
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Q1. How soon you will join
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It was basic coding to test the Python skills like reading data from local and uploading in cloud then some basic dag related questions

Q1. Clustering and partition difference in data warehousing solutions
Ans. 
Clustering involves grouping similar data together, while partitioning involves dividing data into smaller, manageable sections.
• Clustering is used to group similar data points together based on certain criteria, such as customer segments or product categories.

• Partitioning involves dividing a large dataset into smaller, more manageable sections for easier data retrieval and processing.

• Clustering is often used for data a...read more
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Q2. What are the different approaches to Optimising SQL
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Different approaches to optimizing SQL include indexing, query optimization, and database design.
• Use indexing to improve query performance

• Optimize queries by avoiding unnecessary joins and using appropriate functions

• Design the database schema efficiently to reduce redundancy and improve data retrieval speed
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Q3. Spark and it’s architecture
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Q4. Finding the count of Item bought by an customer from Flipkart during a year excluding February
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To find the count of items bought by a customer from Flipkart during a year excluding February, you need to aggregate the data and filter out February transactions.
• Aggregate the data by customer and item purchased

• Filter out transactions from February

• Count the number of items bought by each customer
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