Cognizant
American multinational information technology services and consulting company.
4 Rounds
~21 Days
Medium
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Data Scientist
•
System Design
•
medium
Walk me through the process of taking a trained scikit-learn model and deploying it as a REST API in a production environment.
#Deployment
#FastAPI/Flask
#Docker
Data Scientist
•
System Design
•
medium
A model deployed for a retail client 6 months ago is showing degraded performance. What are the types of model drift, and how do you detect them?
#Model Monitoring
#Data Drift
#Concept Drift
Data Scientist
•
Technical
•
medium
Describe your experience using cloud platforms (AWS SageMaker, Azure ML, or GCP Vertex AI) for end-to-end model training and deployment.
#Cloud Computing
#AWS
#Azure
#GCP
Machine Learning Engineer
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System Design
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hard
How do you optimize the inference speed of a Large Language Model (LLM) deployed in production?
#LLMs
#Optimization
#Inference
Machine Learning Engineer
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System Design
•
medium
How do you monitor a machine learning model in production? Specifically, how do you detect and handle concept drift?
#Model Monitoring
#Concept Drift
#MLOps
Machine Learning Engineer
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Technical
•
medium
Describe your experience with cloud ML platforms like AWS SageMaker, Azure ML, or GCP Vertex AI. How do you use them for model training and deployment?
#Cloud Computing
#AWS
#Azure
#GCP
Machine Learning Engineer
•
Technical
•
medium
Walk me through how you would containerize a trained Scikit-Learn model and deploy it as a REST API.
#Docker
#FastAPI
#Deployment
Difficulty Radar
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Senior EngineerFocuses on core competencies, system constraints, and clear communication.
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Always explain your thought process before writing code or drawing architecture.