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Question 1

Who created python and when

Answer 1

Guido van Rossum during 1985- 1990.

Question 2

a very popular general-purpose interpreted, interactive,
object-oriented, and high-level programming language.

Answer 2

Python

Question 3

when was python first introduced

Answer 3

1991

Question 4

One of the key factors contributing to Python’s popularity is its concise set of keywords. Python’s appeal lies in its straightforward syntax, the use of indentation to maintain code structure instead of cluttering it with curly brackets, and its dynamic typing, which eliminates the need for prior variable declarations.

Answer 4

Python is Easy to learn

Question 5

Python comes with a cool interactive tool called a “shell.” It’s like
having a chat with Python itself! When you open the Python shell, it
shows a friendly&raquo_space;> prompt. You can type in any math or code stuff
you want, and Python will talk back to you right away.

Answer 5

Python is Interactive

Question 6

Python is a versatile language that can wear many hats when it comes to programming styles. It’s fundamentally object-oriented, which means everything in Python is treated as an object. But here’s the cool part: Python can also act like other types of languages.

Answer 6

Python is MultiParadigm

Question 7

Even though it has a very few keywords (only Thirty Five), Python
software is distributed with a standard library made of large number of modules and packages.

Answer 7

Python’s Standard Library

Question 8

Python’s standard distribution has an excellent graphics library called TKinter. It is a Python port for the vastly popular GUI toolkit called TCL/Tk.

Answer 8

Python for GUI Applications

Question 9

Almost any type of database can be used as a backend with the Python application. DB-API is a set of specifications for database driver software to let Python communicate with a relational database.

Answer 9

Python’s Database Connectivity

Question 10

Python has become an essential skill for data scientists. Today, real time web applications, mobile applications and
other devices generate huge amount of data.

Answer 10

Python for Data Science

Question 11

Python libraries like Scikit-learn and TensorFlow are incredibly useful
for creating models that predict things, like figuring out if customers
are happy or guessing what stock prices might do in the future.

Answer 11

Python for Machine Learning

Question 12

Python’s web frameworks, like Django, Pyramid, Flask, and others, are highly favored by web developers because they speed up the process of creating web applications.

Answer 12

Python for Web Development

Question 13

OpenCV is a widely popular library for capturing and processing images. Image processing algorithms extract information from images, reconstruct image and video data.

Answer 13

Python for Computer Vision and Image
processing

Question 14

Python found one of its first applications in automating CRON
(Command Run ON) jobs. Certain tasks like periodic data backups, can be written in Python scripts scheduled to be invoked automatically by operating system scheduler.

Answer 14

Python for Job Scheduling and Automation

Question 15

Python programming provides no braces to indicate blocks of code for class and function definitions or flow control. Blocks of code are
denoted by line indentation, which is rigidly enforced. All statements
within the block must be indented

Answer 15

Python Lines and Indentation

Question 16

Python accepts single (‘), double (“) and triple (‘’’ or “””) quotes to
denote string literals, as long as the same type of quote starts and ends
the string.

Answer 16

Quotations in Python

Question 17

Data items belonging to different data types are stored in computer’s
memory. Computer’s memory locations are having a number or
address, internally represented in binary form.

Answer 17

Python Variables

Question 18

Python Naming Patterns

Answer 18

Camel Case, Pascal Case, and Snake Case

Question 19

represents a kind of value and determines what operations
can be done on it

Answer 19

Data Types

Question 20

Any data item having a numeric value is a number. There are Four
standard number data types in Python.

Answer 20

Number Type

Question 21

A string is a sequence of one or more Unicode characters, enclosed in
single, double or triple quotation marks (also called inverted commas).

Answer 21

Strings in Python

Question 22

In Python, List is an ordered collection of any type of data items. Data tems are separated by comma (,) symbol and enclosed in square
brackets ([]).

Answer 22

List in Python

Question 23

an ordered collection of any type of data items.
Data items are separated by comma (,) symbol and enclosed in parentheses or round brackets ().

Answer 23

Tuples in Python

Question 24

List is mutable object, whereas tuple is immutable. An object is
immutable means once it is stored in the memory, it cannot be
changed.

Answer 24

The difference between list and tuple

Question 25

collection of key:value pairs. The pairs are separated by comma and put inside curly brackets {}. To establish mapping between key and value, the semicolon':' symbol is put between the two.

Answer 25

Dictionary Type

Question 26

a collection, but is not an indexed or ordered collection as string, list or tuple. An object cannot appear more than once in a set, whereas in List and Tuple, same object can appear more than once.

Answer 26

Set Type

Question 27

refers to converting an object of one type into another.

Answer 27

Casting in Python

Question 28

Types of Operators

Answer 28

* Arithmetic Operators * Comparison (Relational) Operators * Assignment Operators * Logical Operators * Membership Operators * Identity Operators

Question 29

Arithmetic Operators

Answer 29

* Addition Operator (+) * Subtraction Operator (-) * Multiplication Operator (*) * Division Operator (/) * Modulus Operator (%) * Exponent Operator (**) * Floor Division Operator (//)

Question 30

Assignment Operators

Answer 30

* Augmented Addition Operator (+=) * Augmented Subtraction Operator (-=) * Augmented Multiplication Operator (*=) * Augmented Division Operator (/=) * Augmented Modulus Operator (%=) * Augmented Exponent Operator (**=) * Augmented Floor division Operator (//=)

Question 31

Comparison Operators

Answer 31

< Less than a Greater than a>b <= Less than or equal to a<=b >= Greater than or equal to a>=b == Is equal to a==b != Is not equal to a!=b

Question 32

running. This makes the application interactive. Depending on how it is developed, an application may accept the user input in the form of text entered in the console (sys.stdin),

Answer 32

Python - User Input

Question 33

computer programs follow a straightforward sequence, executing one instruction after another in the order they appear.

Answer 33

Control Flow

Question 34

The program is able to decide which of the alternative group of instructions to be executed, depending on value of a certain Boolean expression.

Answer 34

Decision Making

Question 35

Most of the processes require a group of instructions to be repeatedly executed. In programming terminology, it is called a loop. Instead of the next step, if the flow is redirected towards any earlier step, it constitutes a loop.

Answer 35

Looping or Iteration

Question 36

statement takes an expression and compares its value to successive patterns given as one or more case blocks. Only the first pattern that matches gets executed.

Answer 36

MatchCase Statement

Question 37

has the ability to iterate over the items of any sequence, such as a list, tuple or a string.

Answer 37

For loop

Question 38

repeatedly executes a target statement as long as a given Booleanexpression is true.

Answer 38

Python while Loops

Question 39

It terminates the current loop and resumes execution at the next statement, just like the traditional break statement in C.

Answer 39

Python break Statement

Question 40

statement in Python returns the control to the beginning of the current loop. When encountered, the loop starts next iteration without executing the remaining statements in the current iteration.

Answer 40

Python Continue Statement

Question 41

used when a statement is required syntactically but you do not want any command or code to execute.

Answer 41

Python pass Statement

Question 42

block of organized, reusable code that is used to perform a single, related action. Functions provide better modularity for your application and a high degree of code reusing.

Answer 42

Python Functions

Question 43

examples are print(), int(), len(), sum(), etc. These functions are always available, as they are loaded into computer's memory as soon as you start Python interpreter.

Answer 43

Built-in functions

Question 44

The standard library also bundles a number of modules. Each module defines a group of functions. These functions are not readily available.

Answer 44

Functions defined in built-in modules

Question 45

you can also create your own functions. You can define custom functions to provide the required functionality.

Answer 45

User-defined functions

Question 46

When the function is called, value to each of the formal arguments must be provided. Those are called

Answer 46

actual arguments.

Question 47

While defining a function, you must give a list of variables in which the data passed to it is collected. The variables in the parentheses are called

Answer 47

formal arguments.

Question 48

- You can define a function with default value assigned to one or more formal arguments.

Answer 48

Default Arguments

Question 49

Variables in the function definition are used as keywords. When the function is called, you can explicitly mention the name and its value.

Answer 49

Keyword Arguments

Question 50

A variable defined inside a function has local scope. It means that the variable is only accessible and usable within that specific function.

Answer 50

Local Scope:

Question 51

A variable defined outside of any function, typically at the top level of a Python script or module,

Answer 51

Global Scope:

Question 52

provided to load a Python object from one module. The object may be a function, class, a variable etc.

Answer 52

The import Statement

Question 53

The "+" operator is well-known as an addition operator, returning the sum of two numbers. However, the "+" symbol acts as

Answer 53

String Concatenation

Question 54

With this formatting method you can use embedded Python expressions inside string constants. may contain expressions inside the {} placeholder.

Answer 54

f-string Formatting

Question 55

Escape Sequence

Answer 55

\ -Backslash and newline ignored \r -ASCII Carriage Return (CR) \\ -Backslash (\) \t -ASCII Horizontal Tab (TAB) \‘ -Single quote (') \v -ASCII Vertical Tab (VT) \“ -Double quote (") \ooo -Character with octal value ooo \b -ASCII Backspace (BS) \xhh -Character with hex value hh \f -ASCII Formfeed (FF) \a -ASCII Bell (BEL) \n -ASCII Linefeed (LF)

Question 56

Capitalizes first letter of string

Answer 56

capitalize()

Question 57

Converts all uppercase letters in string to lowercase. Similar to lower(), but works on UNICODE characters alot

Answer 57

casefold()

Question 58

Converts all uppercase letters in string to lowercase.

Answer 58

lower()

Question 59

Inverts case for all letters in string.

Answer 59

swapcase()

Question 60

Returns "titlecased" version of string, that is, all words begin with uppercase and the rest are lowercase.

Answer 60

title()

Question 61

composed of a number pixels arranged in a grid. Each of these pixels is a color that can be represented as a red, green, and blue (RGB) value. These values range from 0 to 255 for each of the red, green, and blue components.

Answer 61

Digital Image

Question 62

raw building blocks of an image.

Answer 62

pixel

Question 63

processing the image digitally with the help of a computer.

Answer 63

Digital Image processing

Question 64

built on the top of PIL (Python Image Library) and is considered as the fork for the same as PIL has been discontinued from 2011.

Answer 64

Pillow

Question 65

module that provides simple 2D graphics for Image objects. You can use this module to create new images, annotate or retouch existing images, and generate graphics on the fly for web use.

Answer 65

ImageDraw Class

Question 66

The Pillow module provides the open() and show() function to read and display the image respectively.

Answer 66

Image Class

Question 67

method of the Image class is used to rotate the image by a particular angle counterclockwise around its center.

Answer 67

rotate()

Question 68

image (flip or rotate in 90 degree steps).

Answer 68

.transpose()