top interview questions and answers for Python (1)

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Top Interview Questions and answers for Python

• By
• Bigclasses

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• 1. What is the command used for existing help
  window or for helping command prompt?
• The command used for existing the help window
  is the quit command. The python shell prompt
  will appear by closing the help window
  automatically.

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• 2. How to avoid overload constructors or
  methods in Python?
• The Pythons constructor_init_() is the first
  method of a class. We can try to instantiate an
  object _init_() is automatically invoked by
  python to initialize members of an object.

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• 3. What does the split(), sub(), and subn()
  methods do?
• The Split() uses a regax pattern to split a
  given string into a list. The Sub() will find all
  the substrings where this regex pattern will
  match and then replace them with a different
  string. Subn() is similar to the Sub(). It
  returns the new string along with the no. of
  replacements.

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• 4. Mention the way to display the contents of
  text files in the reverse order
• Firstly, convert the file into the list.
  Secondly, reverse this list by using reversed().
• 5. Mention the way to remove duplicates from a
  list
• You can remove duplicates from the list by
  sorting it from the list, then scanning this list
  from the end, and lastly, delete the duplicate
  elements while scanning the list from
  right-to-left.

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• 6. What are an ODBC and Python?
• ODBC stands for Open Database Connectivity. It
  is the API standard that allows the connections
  with the database supporting the interface as a
  PostreSQL database or Microsoft Access. There are
  3 ODBC modules for Python 1) PythonWin ODBC
  module 2) MxODBC 3) pyodbc

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• 7. Is Python object-oriented?
• Python is object-oriented. It is
  object-oriented programming language. The OOP is
  a programming paradigm based on classes and
  instances of classes. The features of OOP are
  given below
• Encapsulation
• Data Abstraction
• Inheritance
• Polymorphism

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• 8. What does the TkIner do?
• The TkIner is the library of Python. It is a
  toolkit for the GUI development. It supports
  various GUI tools and even widget that is used in
  the GUI applications. The common attribute of
  them includes Dimensions, Colours, Fonts,
  Cursors, and etc.

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• 9. What kind of sequences is supported by
  Python?
• The Python supports 7 sequences, types. They
  are as follows- str, list, tuple, Unicode, byte
  array, xrange, and buffer.
• 10. What does the append() and extend() methods
  do?
• The append() adds the element at the end of the
  list. The extent() adds the elements of another
  list at the end of the list.

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• 11. Mention the simple differences between Java
  and Python
• The Java and Python are used by programmers,
  but the Python is preferred more due to its
  excellent speed of coding. Java has a static type
  data type, and Python has a dynamic typed-data
  type. And Python has a better data science and
  machine learning applications.

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• 12. Mention the working of a compile-time and
  run-time code check.
• Python performs the compile-time checking
  thought some of the checks are postponed like
  name, type, name and etc until the code is
  executed. And if the code references are
  user-defined function doesnt exist, the code
  will then compile successfully. The code might
  even fail with an exception only if it is the
  executed path references the function.

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