Python Interview Questions for Freshers

Wikipedia defines Python as “a widely used general-purpose, high-level programming language. Its design philosophy emphasizes code readability, and its syntax allows programmers to express concepts in fewer lines of code than would be possible in languages such as C++ or Java.” It is essentially a programming language with objects, modules, threads, exceptions and automatic memory management. The benefits of python include simplicity, ease of use, portability, extensibility, and availability of built-in data structures.

“PEP 8” is a coding convention. It is a set of recommendations on making Python code more readable.

Python memory is managed by the Python “private heap space”. All Python objects and data structures are located in a “private heap”. Python also has an inbuilt “garbage collector”, that recycles all the unused memory, frees it up, and makes it available to the “heap space”.

• “PyChecker” is a static analysis tool that detects the bugs in Python source code and sends out warnings around the style and complexity of the bug.
• “Pylint” is a tool that verifies whether the module meets accepted coding standards.

The “Pickle” module converts any Python object into a string representation and dumps it into a file using the “dump” function. This process is called “Pickling”. “Unpickling”, on the other hand, is the process of retrieving original Python objects from the stored string representation.

Python is an interpreted language. Python programs run directly from the source code. It converts the source code that is written by the programmer into an intermediate language, which is again translated into machine language before getting executed.

Everything in Python is an “object” and all “variables” hold references to the objects. The value of the “references” are in accordance to “functions”. As a result of this, you cannot change the value of the “references”. However, you can change the “objects” if they are mutable.

They are syntax constructions to ease the creation of “Dictionary” or “List” based on existing “iterable”.

“lambda forms” in python do not have statements since they are used to create new “function” objects and then return them during runtime.

“Pass” is a no-operation Python statement. It is essentially a place holder in the compound statement which should be left blank.

In Python, “iterators” are used to iterate a group of “elements” or “containers”.

The unit testing framework of Python is known as “unittest”. It supports the sharing of setups, automation testing, shutdown code for tests, aggregation of tests into collections, among others.

Mutable “types”:

• List
• sets
• Dictionaries

Immutable "types":

• Strings
• Tuples
• Numbers

In Python, every new “name” has a place where it resides. This location is known as “namespace”.

It is a single expression anonymous function often used as an inline function.

“Slicing” is a mechanism to select a range of items from sequence types like list, tuple, strings etc.

Generators are the means to implement iterators. It is a normal function except that it yields “expression” in the “function”.

“Docstring” is a Python documentation string. It is the means to document Python “functions”, “modules” and “classes”.

“Xrange” returns the “Xrange” object while range returns the “list” irrespective of the size of the “range”.

Each Python program file is a “module”, which imports other modules like “objects” and “attributes”. A Python program folder is a “package” of “modules”. A package can have “modules” or “subfolders”.

“PEP 8” is a coding convention. It is a set of recommendations on making Python code more readable. If you know more Python Interview Questions which freshers must need to know to face interview please comment below so we can add them to the list