Python Interview Preparation Guide
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Python Interview Questions and Answers will guide us now that Python is a general-purpose high-level programming language. Its design philosophy emphasizes code readability. Python claims to remarkable power with very clear syntax and its standard library is large and comprehensive. Learn more about the Python Programming language basic and advance concepts or get preparation of Python Jobs Interview by our Python Interview Questions and Answers Guice.

25 Python Questions and Answers:

1 :: What is python?

Python is an open source language that is getting a lot of attention from the market.

1) Created by: Guido van Rossum nearly 11 years ago

2) Python is an interpreted, high-level programming language, pure object-oriented and powerful server-side scripting language for the Web.

3) Python is a good prototype language. In just a few minutes, you can develop prototypes that would take you several hours in other languages.
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2 :: Is python the right choice for Web based Programming?

Python is another open source programming that has become popular for creating web-related applications and large programs. Scripts written in Python are often very clear to read; the language is also known for its flexibility. Whether you are looking for database tools, image manipulation scripts, or something else entirely, if it is written in Python, you will find it here.
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3 :: What are uses of lambda?

It used to create small anonymous functions at run time. Like e.g.

def fun1(x):

return x**2

print fun1(2)

it gives you answer 4

the same thing can be done using

sq=lambda x: x**2

print sq(2)

it gives the answer 4
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4 :: When you need ordered container of things, which will be manipulated, use lists.

Dictionary is key, value pair container and hence is not ordered. Use it when you need fast access to elements, not in ordered fashion. Lists are indexed and index of the list cannot be “string” e.g. list ['myelement'] is not a valid statement in python.
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5 :: When do you use list vs. tuple vs. dictionary vs. set?

List and Tuple are both ordered containers. If you want an ordered container of constant elements use tuple as tuples are immutable objects.
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6 :: Do they know a tuple/list/dict when they see it?

Dictionaries are consisting of pair of keys and values.like {’key’:'value’}.

book={’cprog’:'1024',’c++’:'4512'}

Keys are unique but values can be same. The main difference between list and tuple is you can change the list but you cannot change the tuple. Tuple can be used as keys in mapping where list is not.
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7 :: What is used to represent Strings in Python? Is double quotes used for String representation or single quotes used for String representation in Python?

Using Single Quotes (')

You can specify strings using single quotes such as 'Quote me on this' . All white space i.e. spaces and tabs are preserved as-is.

Using Double Quotes (")

Strings in double quotes work exactly the same way as strings in single quotes. An example is "What's your name?"

Using Triple Quotes (''' or """)

You can specify multi-line strings using triple quotes. You can use single quotes and double quotes freely within the triple quotes. An example is

'''This is a multi-line string. This is the first line.

This is the second line.

"What's your name?," I asked.

He said "Bond, James Bond."
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8 :: Who created the Python programming language?

Python programming language was created by Guido van Rossum.
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9 :: Why cannot lambda forms in Python contain statements?

A lambda statement is used to create new function objects and then return them at runtime that is why lambda forms in Python did not contain statement.
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10 :: How is memory managed in Python?

Memory is managed through private heaps. Private heap is managed by python memory manager.
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