Blend360 Data Engineer Interview Questions and Answers

Q1. Python - find max from array without using built in function
Ans. 
Find max from array in Python without using built-in function.
• Iterate through the array and compare each element with a variable storing the current maximum value.

• If the element is greater than the current maximum, update the variable.

• Return the variable after iterating through the entire array.
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Q2. Spark cluster configuration
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Q3. Python split data interview question
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Full c concept MCQ with IQ and Computaional Thinking

Q1. Number system convertion in c
Ans. 
Number system conversion in C involves converting numbers between different bases, such as decimal to binary or hexadecimal.
• Use functions like itoa() to convert integers to strings in different bases

• Use strtol() to convert strings to integers in different bases

• Remember to specify the base when converting numbers
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Q2. Pointers, struct, Data Structure
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Q1. Decimal to Binary Convertion
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Q2. Hexa Decimal to Binary convertion
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Forecasting problem - Predict daily sku level sales

Q1. What is difference between bias and variance
Ans. 
Bias is error due to overly simplistic assumptions, variance is error due to overly complex models.
• Bias is the error introduced by approximating a real-world problem, leading to underfitting.

• Variance is the error introduced by modeling the noise in the training data, leading to overfitting.

• High bias can cause a model to miss relevant relationships between features and target variable.

• High variance can cause a model to ...read more
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Q2. Parametric vs non parametruc model
Ans. 
Parametric models make strong assumptions about the form of the underlying data distribution, while non-parametric models do not.
• Parametric models have a fixed number of parameters, while non-parametric models have a flexible number of parameters.

• Parametric models are simpler and easier to interpret, while non-parametric models are more flexible and can capture complex patterns in data.

• Examples of parametric models inc...read more
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Puzzles, speed, logical questions

Q1. Self introduction
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Q2. Background and coding knowledge
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Q1. DevOps tools related questions
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Q2. And python programming questions
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Q1. Introducing your self, and some basic technical questions.
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Q1. Basic core java questions like 1. Why object oriented? 2. Oops concept 3.diffrence between method overloading and overriding 4.static members 5.Occurance of a string 6.why immutable string is? 7.construc...read more
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Q2. Basic program in array
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Q1. 1. How to fetching data from html 2. Service about rest API 3. Difference between doget and dopost 4. Sql sub query 5. Collection question
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Q1. Basic question about company and role
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Topics:
Python, Django, MySQL, Automation, Technical questions

Q1. Topics: Python, Django, MySQL, Automation, Technical questions
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Q2. Explain Django Architecture
Ans. 
Django follows Model-View-Controller (MVC) architectural pattern.
• Django has a high-level architecture that follows the Model-View-Controller (MVC) architectural pattern.

• The Model layer represents the database schema and business logic.

• The View layer is responsible for rendering the templates and presenting the data to the user.

• The Controller layer handles the user's input and interacts with the Model and View layers.

• Dj...read more
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Q3. Difference between XML and JSON
Ans. 
XML is a markup language while JSON is a lightweight data interchange format.
• XML uses tags to define elements while JSON uses key-value pairs.

• XML is more verbose and complex than JSON.

• JSON is easier to read and parse than XML.

• XML supports namespaces and validation while JSON does not.

• XML is widely used in web services and document exchange while JSON is preferred for data exchange between applications.
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