Jet2 Travel Technologies Data Engineer Interview Questions and Answers

Q1. Explain Moving Average
Ans. 
Moving Average is a statistical technique used to analyze data points by creating a series of averages of different subsets of the full data set.
• Moving Average helps in smoothing out fluctuations in data to identify trends over time.

• It is calculated by taking the average of a specific number of data points within a defined window.

• For example, a 3-day moving average for stock prices would be the average of the stock pri...read more
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Q2. Explain Decorators
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Decorators in Python are functions that modify the behavior of other functions.
• Decorators are denoted by the @ symbol followed by the decorator function name.

• They allow you to add functionality to an existing function without modifying its code.

• Common use cases include logging, timing, and authentication.

• Example: @decorator_function def function_to_decorate(): pass
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Q3. Explain Object Oriented Programming
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Object Oriented Programming is a programming paradigm based on the concept of objects, which can contain data and code.
• OOP focuses on creating objects that interact with each other to solve complex problems.

• Objects have attributes (data) and methods (functions) that can manipulate the data.

• Encapsulation, inheritance, and polymorphism are key principles of OOP.

• Example: In a car simulation program, a 'Car' object can hav...read more
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Q4. Explain classes objects
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Classes are blueprints for creating objects in object-oriented programming.
• Classes define the properties and behaviors of objects

• Objects are instances of classes

• Classes can inherit properties and behaviors from other classes

• Classes can have constructors to initialize objects

• Classes can have methods to perform actions
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Q5. Explain Functions
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Functions are blocks of code that perform a specific task and can be reused multiple times in a program.
• Functions help in organizing code and making it more modular.

• They can take input parameters and return output values.

• Functions can be called multiple times from different parts of the program.

• Examples: summing two numbers, finding the maximum value in a list.
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Q6. Pandas and Numpy
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Q7. Swap L1 and L5 in a list
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Swap L1 and L5 in a list
• Create a temporary variable to store the value of L1

• Assign the value of L5 to L1

• Assign the value of the temporary variable to L5
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Q1. Sql, advance Excel formulas
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Well designed to test the aptitude competence of the candidate.

Q1. Explanations for the answers given to the aptitude questions.
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Q2. Questions from python.
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Logical and aptitude test, game round

First round is gaming round with 13 levels
And the aptitude with science, technical and non technical questions

Q1. General questions were asked Tell me about yourself And then technical he round with puzzles and aptitude to solve
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Q2. Long term and short term goals
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Q3. Strength and weakness
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Q4. Puzzles and aptitude questions
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