Globant Data Engineer Interview Questions and Answers

Q1. About the project and technical aspect
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Q1. What is the architecture of Spark?
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Q1. About project what are optimization you have done
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Easy to medium (30 mins, offline)

Q1. 1. search algorithm 2. sorting
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Q1. How to read files in pandas?
Ans. 
Pandas can read various file formats including CSV, Excel, JSON, HTML, and SQL.
• Use pandas.read_csv() to read CSV files

• Use pandas.read_excel() to read Excel files

• Use pandas.read_json() to read JSON files

• Use pandas.read_html() to read HTML tables

• Use pandas.read_sql() to read SQL tables

• Specify the file path or URL as the argument

• Additional parameters can be used to customize the reading process
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Q2. How to use lambda function
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Lambda functions are anonymous functions that can be used to perform a single task or operation.
• Lambda functions are defined using the lambda keyword.

• They can take any number of arguments but can only have one expression.

• Lambda functions are often used as arguments for higher-order functions.

• Example: lambda x: x**2 defines a lambda function that squares its input.

• Example: sorted(my_list, key=lambda x: x[1]) sorts a lis...read more
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Q1. Reverse the linked list.
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Q1. Internel working of Hashmap
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Q1. Salary Discussion
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Q1. Explain OOPS concept and how you apply it in your implementation
Ans. 
OOPS is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOPS focuses on the concept of classes and objects

• Encapsulation: bundling data and methods that operate on the data within a single unit

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

• Polymorphism: ability to present the same interface for diffe...read more
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Q2. Difference between Comparable and Comparator. Difference between Abstract Class and Interface
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Comparable is an interface used for natural ordering, Comparator is an interface used for custom ordering. Abstract class can have method implementations, Interface cannot.
• Comparable interface is used to define the natural ordering of objects. Example: String class implements Comparable interface for natural ordering based on alphabetical order.

• Comparator interface is used to define custom ordering of objects. Example:...read more
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Q3. Given a string. Find the number of occurrences of each character
Ans. 
Count occurrences of each character in a given string
• Create an array to store the count of each character

• Iterate through the string and increment the count of each character in the array

• Return the array with counts for each character
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Q4. Given an array. Remove the number of duplicates
Ans. 
Remove duplicates from an array of strings
• Iterate through the array and store each element in a set to keep track of unique values

• Create a new array with the unique values from the set
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Q5. Given a student object having name and grade data variables. Sort the object on the basis of highest grade.
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It included aptitude, technical and coding questions

Q1. Questions on SQL(Joins)
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Q2. Questions on arrays, substrings
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Q1. Location preferred
Ans. 
Remote work preferred, open to occasional travel
• Remote work preferred

• Open to occasional travel

• Flexible with location
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Q2. Family background
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