Vertisystem Data Engineer Interview Questions and Answers

The aptitude test was relatively straightforward, consisting of both aptitude and technical questions, with a difficulty level ranging from easy to medium.

Q1. Was asked to write a code on basic DSA concept
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Q2. Then was asked basic questions on DSA and SQL
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Q1. Asking about the whereabouts
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Q2. Checking com skills and availability
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Q1. Basic questions based on resume
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Q2. Basic .net questions
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Q3. Logical questions related to problem solving
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Full c concept MCQ with IQ and Computaional Thinking

Q1. Number system convertion in c
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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
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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
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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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Q1. Four Pillars of OOPS in Java?
Ans. 
Encapsulation, Inheritance, Polymorphism, Abstraction are the four pillars of OOPS in Java.
• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the implementation details and showing only the necessary features.
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Q2. What is a constructor in Java?
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A constructor in Java is a special type of method that is used to initialize objects.
• Constructors have the same name as the class they are in.

• They do not have a return type, not even void.

• Constructors are called when an object of a class is created.

• Example: public class Car { public Car() { // constructor code } }
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Q1. Basic flutter coding questions
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Coding test on java full stack

Q1. Explain about classes
Ans. 
Classes are blueprints for creating objects in object-oriented programming. They define properties and behaviors.
• Classes are templates for creating objects with similar properties and behaviors.

• They can have attributes (variables) and methods (functions).

• Classes can inherit properties and behaviors from other classes through inheritance.

• Example: Class 'Car' can have attributes like 'color' and methods like 'drive'.
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Q2. What is string in java?
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A string in Java is a sequence of characters used to represent text.
• Strings are objects in Java and are immutable, meaning their values cannot be changed once they are created.

• Strings can be created using double quotes, like "Hello, World!", or by calling the String constructor.

• String concatenation can be done using the '+' operator, like "Hello" + "World".

• Common methods for manipulating strings include length(), charA...read more
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Q1. Basic all type questions
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Q1. Project related and technology se related
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