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Veltris Interview Questions and Answers
14 Interview questions
Activation functions introduce non-linearity, enabling neural networks to learn complex patterns and relationships in data.
Activation functions determine the output of a neuron given an input, influencing the network's ability to model complex functions.
Common activation functions include ReLU (Rectified Linear Unit), Sigmoid, and Tanh, each with unique properties.
ReLU is popular for hidden layers due to its simpl...
Machine learning models learn from data through training, involving data preparation, model selection, training, and evaluation.
Data Collection: Gather relevant data, e.g., images for image classification.
Data Preprocessing: Clean and format data, e.g., normalizing pixel values.
Model Selection: Choose an appropriate algorithm, e.g., decision trees or neural networks.
Training: Feed data into the model to adjust wei...
Led various data science projects focusing on predictive modeling, NLP, and data visualization to drive business insights.
Developed a predictive model for customer churn using logistic regression, improving retention rates by 15%.
Implemented a natural language processing (NLP) solution to analyze customer feedback, identifying key areas for product improvement.
Created interactive dashboards using Tableau to visual...
I would reflect on my performance, seek feedback, and use the experience to grow professionally and personally.
Reflect on my contributions: I'd analyze what I did well and where I could improve.
Seek constructive feedback: I'd ask my manager for insights on my performance.
Network with colleagues: I'd maintain relationships for future opportunities.
Update my resume: I'd ensure my skills and experiences are current f...
Designing a custom loss function involves defining a metric that aligns with specific model objectives and data characteristics.
Identify the problem: Understand the specific task (e.g., classification, regression) and the desired outcomes.
Define the loss: Create a mathematical expression that quantifies the difference between predicted and actual values.
Incorporate domain knowledge: Use insights from the specific ...
has_one is a one-to-one association while has_and_belongs_to_many is a many-to-many association in Ruby on Rails.
has_one is used when one record is associated with another record.
has_and_belongs_to_many is used when multiple records are associated with multiple records.
has_one creates a foreign key in the associated record's table.
has_and_belongs_to_many creates a join table to store the associations.
The full design process involves identifying requirements, brainstorming ideas, creating prototypes, testing and refining designs, and finalizing the product.
Identify requirements and constraints
Brainstorm ideas and concepts
Create prototypes for testing
Test and refine designs based on feedback
Finalize the product design
Let, Var, and Const are JavaScript keywords used for declaring variables with different scoping rules and mutability.
Var has function scope and can be redeclared and reassigned.
Let has block scope and can be reassigned but not redeclared.
Const has block scope and cannot be reassigned or redeclared.
Use const for values that won't change, let for values that will, and var for legacy code or global variables.
Test case for ordering a product with a promo code on an e-commerce site.
Verify product selection: Ensure the user can select a product from the catalog.
Check promo code entry: Validate that the promo code field is present and functional.
Apply valid promo code: Test applying a valid promo code and check if the discount is applied correctly.
Apply invalid promo code: Ensure that an error message is displayed when an...
API testing ensures that APIs function correctly, meet requirements, and handle errors gracefully.
Verify API endpoints: Check if the endpoints return the expected responses, e.g., GET /users should return a list of users.
Validate response formats: Ensure the API returns data in the correct format, such as JSON or XML.
Test authentication: Confirm that secure endpoints require proper authentication, e.g., a token fo...
Veltris Interview Experiences
22 interviews found
Anonymous
Asked about find the duplicates of a number
I applied via Naukri.com and was interviewed in May 2024. There was 1 interview round.
(2 Questions)
- Q1. L1 vs L2 regularization
- Ans.
L1 regularization adds penalty equivalent to absolute value of coefficients, promoting sparsity. L2 regularization adds penalty equivalent to square of coefficients, promoting smaller weights.
L1 regularization is also known as Lasso regularization.
L2 regularization is also known as Ridge regularization.
L1 regularization can lead to feature selection by setting some coefficients to zero.
L2 regularization is more stable ...
- Q2. Ensemble techniques
Interview Preparation Tips
Skills evaluated in this interview
I appeared for an interview in Dec 2024, where I was asked the following questions.
- Q1. How does a machine learning model acquire knowledge from training data, and what steps are involved in the model training pipeline?
- Ans.
Machine learning models learn from data through training, involving data preparation, model selection, training, and evaluation.
Data Collection: Gather relevant data, e.g., images for image classification.
Data Preprocessing: Clean and format data, e.g., normalizing pixel values.
Model Selection: Choose an appropriate algorithm, e.g., decision trees or neural networks.
Training: Feed data into the model to adjust weights,...
- Q2. What is the role of activation functions in neural networks, and how do they influence the learning process?
- Ans.
Activation functions introduce non-linearity, enabling neural networks to learn complex patterns and relationships in data.
Activation functions determine the output of a neuron given an input, influencing the network's ability to model complex functions.
Common activation functions include ReLU (Rectified Linear Unit), Sigmoid, and Tanh, each with unique properties.
ReLU is popular for hidden layers due to its simplicity...
Sudarshanam Anusha
(1 Question)
- Q1. About testing process
I applied via Referral and was interviewed in Apr 2024. There were 2 interview rounds.
Test case assignment
(1 Question)
- Q1. Based on java and selenium
Selected
I appeared for an interview before Jun 2024, where I was asked the following questions.
- Q1. Introduce yourself
- Ans.
I am a Lead Data Scientist with extensive experience in machine learning, data analysis, and driving data-driven decision-making.
Over 8 years of experience in data science and analytics, focusing on predictive modeling and statistical analysis.
Led a team of data scientists at XYZ Corp, where we developed a machine learning model that improved customer retention by 20%.
Expert in Python, R, and SQL, with hands-on experie...
- Q2. Explain projects
- Ans.
Led various data science projects focusing on predictive modeling, NLP, and data visualization to drive business insights.
Developed a predictive model for customer churn using logistic regression, improving retention rates by 15%.
Implemented a natural language processing (NLP) solution to analyze customer feedback, identifying key areas for product improvement.
Created interactive dashboards using Tableau to visualize s...
Interview Preparation Tips
Selected
I appeared for an interview before Mar 2024, where I was asked the following questions.
- Q1. How do you design custom loss function?
- Ans.
Designing a custom loss function involves defining a metric that aligns with specific model objectives and data characteristics.
Identify the problem: Understand the specific task (e.g., classification, regression) and the desired outcomes.
Define the loss: Create a mathematical expression that quantifies the difference between predicted and actual values.
Incorporate domain knowledge: Use insights from the specific field...
- Q2. Scenario based question on RAG & Agentic AI
(1 Question)
- Q1. Explain the difference between has one and has and belongs to many in Ruby on Rails
- Ans.
has_one is a one-to-one association while has_and_belongs_to_many is a many-to-many association in Ruby on Rails.
has_one is used when one record is associated with another record.
has_and_belongs_to_many is used when multiple records are associated with multiple records.
has_one creates a foreign key in the associated record's table.
has_and_belongs_to_many creates a join table to store the associations.
(1 Question)
- Q1. Why do you want to change
Skills evaluated in this interview
Selected
I applied via Campus Placement and was interviewed in Feb 2023. There were 4 interview rounds.
Simple , basic programming skills are enough
(1 Question)
- Q1. Interview is mostly on DBMS,and Daya structures
(1 Question)
- Q1. Favorite subject, Hobbies,and relation woth technology
(1 Question)
- Q1. Favorite subject, inspiration
Interview Preparation Tips
I applied via Campus Placement
SubString - From a string find all the possible substrings following a pattern
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