PayPal Data Analyst Intern Interview Questions and Answers

B2B invoice management application - Using ReactJS in front-end and Java in back-end and then integrate with machine learning algorithms to update dates and find out the customers according to the present data (important customers and then manage their invoices).

Q1. Interview - About technical skills.
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Q1. Programming skills
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Q1. Discussion on linear regression and regularisation techniques
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Q2. Discussion on tree based models and measures to score the models
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Q1. DBSCAN Clustering
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Q2. How does current work helps solving use cases for PayU
Ans. 
My current work involves analyzing transaction data to identify patterns and trends, which can help PayU optimize their payment processing services.
• Analyzing transaction data to identify fraudulent activities and improve security measures for PayU

• Developing predictive models to forecast transaction volumes and optimize payment processing times

• Utilizing machine learning algorithms to personalize user experiences and inc...read more
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Q1. Details about past projects
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Q2. Details about latest project
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Q1. SQL coding tests
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Q1. Discussed about hybrid mode of work
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Q1. What is a Transformer
Ans. 
A Transformer is a type of deep learning model that uses attention mechanisms to improve the efficiency of sequence-to-sequence tasks.
• Utilizes self-attention mechanism to weigh the importance of different input elements

• Commonly used in natural language processing tasks such as machine translation and text generation

• Examples include BERT, GPT, and Transformer-XL
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Q1. Normal HR questions,
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Q1. Based on my resume sql excel and python
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Q1. Guesstimates ,puzzle
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