Xcaliber Infotech Interview Questions, Process, and Tips

Q1. What is bias variance tradeoff in machine learning
Ans. 
Bias-variance tradeoff is the balance between underfitting and overfitting in machine learning models.
• Bias refers to error from erroneous assumptions in the learning algorithm, leading to underfitting.

• Variance refers to error from sensitivity to small fluctuations in the training set, leading to overfitting.

• The tradeoff involves finding the right level of model complexity to minimize both bias and variance.

• Regularizati...read more
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Q2. Explain your project
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Q3. Write a SQL code to find 2nd highest salary
Ans. 
SQL code to find 2nd highest salary
• Use the MAX() function to find the highest salary

• Use the WHERE clause to exclude the highest salary

• Order the salaries in descending order and limit the result to 1
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Q1. SQL queries (Aggregate Functions) Advanced excel Scenario Based Questions SQL Joins User Story
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Q1. User Stories (2-3) Types of documents that BA prepares 5-6 scenario based questions Agile Methodologies Scrum Events and Artifacts
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Basic Java arrays que

Q1. Basic technical que
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Q1. Mostly SQL Questions Scenario based questions
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Q1. Tricky scenario based questions Questions based on hobbies Asked to write User stories for specific requirements
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Q1. Etl process explanations?
Ans. 
ETL (Extract, Transform, Load) is a data integration process that involves extracting data from various sources, transforming it, and loading it into a destination.
• Extract: Data is gathered from multiple sources like databases, APIs, or flat files. Example: Pulling customer data from a CRM system.

• Transform: Data is cleaned, enriched, and formatted to meet business requirements. Example: Converting date formats or aggre...read more
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Q2. Sql, database, frontend, manual questions
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Q3. Agile process with overall project knowledge
Ans. 
Agile process emphasizes collaboration, flexibility, and iterative progress in project management, enhancing overall project knowledge.
• Agile promotes regular communication through daily stand-ups, ensuring everyone is aligned on project goals.

• Iterative development allows for continuous feedback, enabling teams to adapt quickly to changes.

• Cross-functional teams enhance overall project knowledge by integrating diverse sk...read more
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Python sql coading questions with mcqa

Q1. What is Acid Properties
Ans. 
ACID properties are a set of properties that guarantee database transactions are processed reliably.
• ACID stands for Atomicity, Consistency, Isolation, Durability

• Atomicity ensures that either all operations in a transaction are completed or none are

• Consistency ensures that the database remains in a consistent state before and after the transaction

• Isolation ensures that multiple transactions can occur concurrently withou...read more
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Q1. Knowledge of UX and other process flow questions.
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Assignment given on design and UX wireframe

Q1. One on one round with VP
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