MasterCard Data Consultant Interview Questions and Answers

Q1. Short cut keys of tools
Ans. 
Short cut keys are keyboard shortcuts that allow users to quickly perform actions in various tools.
• Ctrl + C: Copy

• Ctrl + V: Paste

• Ctrl + X: Cut

• Ctrl + Z: Undo

• Ctrl + S: Save

• Ctrl + P: Print
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Q1. Project explanation in brief manner
Ans. 
Developed a predictive model to forecast sales based on historical data
• Collected and cleaned historical sales data

• Performed exploratory data analysis to identify trends and patterns

• Built and trained machine learning model using regression techniques

• Evaluated model performance using metrics like RMSE and MAE
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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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We were trained for 2 weeks on web dev. and data science and were given individual 2 projects, according to the performance on them and a final interview, candidates were selected.

Q1. All about the assignment done
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Q2. Your interest and particular domain you want to work in
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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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