Frage im Vorstellungsgespräch bei Tata Consultancy Services

DB Python and IronPython, CPython What is the fastest implementation of Python What is memory management in Python Stack and Heap memory Garbage collector Multithreading and Multiprocessing Global Interpreter Lock/Context switch How to improve performance if threads/processor is limited OOPs concept Inheritance/Polymorphism Class method What is init in classes Is init required in every class What is self in Class. Is it a reserved keyword? What is ‘__’ before a string? What is ‘_’ before a string? How are protected and private variables created? What are static variables in Python? Does it exist? DB Shallow copy and Deep copy? Serialization and Deserialization? Define functools/iter tools? Collections module? Decorator? [1,2,3] to 123 without using loop Map function What is join? Join two lists Find common characters between two lists? Set operations in python? Any experience in xlsxwriter, openpyxl How to clean data using pandas, data cleaning? Skewness kurtosis Data analysis and Data transformation experience? Plotting graph example in Python? Matplotlib? Get vs Post vs Put methods DB Sessions and cookies?