Getting Started with Python

Both A and R are true and R is the correct explanation of A.

Explanation
Python is an object-oriented programming language, which means it supports the concepts of classes and objects. In Python, everything is treated as an object, including integers, strings, functions, and even modules and packages. Using Python, any software can be designed.

A is true but R is false.

Explanation
Python uses an interpreter to convert source code to object code. The Python interpreter is a special virtual engine that converts source code (written in Python) to machine code that can be executed by the computer.

Both A and R are true and R is the correct explanation of A.

Explanation
The print() function is a built-in function in Python that displays the content on the system screen or console. To print the value of a variable, Python uses the print() function.

Both A and R are true and R is the correct explanation of A.

Explanation
Python is a cross-platform language because it can run on various operating systems, such as Windows, Macintosh, Apple, Linux etc.

Both A and R are true and R is the correct explanation of A.

Explanation
Python is a dynamically typed language because variables do not need to be declared with a specific type. Instead, the type of a variable is determined at runtime based on the value assigned to it.

A is false but R is true.

Explanation
Python is not considered the fastest programming language as it is slower than many compiled languages such as C or C++ because it is interpreted rather than compiled. Python is an interpreted language, which means that Python code is executed line by line at runtime by an interpreter, without the need for a separate compilation step to machine code.

Both A and R are true and R is the correct explanation of A.

Explanation
Python's Integrated Development and Learning Environment (IDLE) or interpreter provides two modes to work with: interactive mode and script mode. Interactive mode comprises the Python prompt '>>>' where we can start typing commands and see the output immediately. In script mode, we can write a Python program in a file and execute it to display the output.

Both A and R are true and R is the correct explanation of A.

Explanation
Python is a general-purpose language, meaning it is versatile and can be used to create a variety of programs. Python is an object-oriented language used to build websites and software, automate tasks, and conduct data analysis.

Guido van Rossum

Reason — Python was developed by Guido van Rossum.

"This is great!"

Reason — The "This is great!" text uses double quotes (") to properly enclose the entire string. In Python, strings enclosed in either single quotes (') or double quotes (") are valid, but the entire string must be enclosed in the same type of quote. The other options have mismatched quotes, which cause syntax errors in Python.

Free and Open Source

Reason — Python is a free and open-source language.

print("Hello")

Reason — In Python, when using the print() function, strings must be enclosed in matching pairs of either single (') or double quotes ("). Therefore, the correct statement is print("Hello").

Ctrl+Q

Reason — The shortcut key combination for exiting Python shell is Ctrl+Q.

.py or .pyw

Reason — The extension for a Python file is .py or .pyw.

Interpreted

Reason — Python is an interpreted language. This means that Python code is executed line by line at runtime by an interpreter, without the need for a separate compilation step to machine code.

Python shell

Reason — The interactive interpreter of Python is termed as Python shell.

Command prompt

Reason — The three greater than signs (>>>) are called the Python command prompt or interactive prompt.

#

Reason — The # symbol in Python indicates the start of a single-line comment, which extends from the # to the end of the line.

print("Programming is fun")
print("Python") 
print("Computer Science")

Reason — In Python, the print() function is written in lowercase (print) and strings must be enclosed in matching pairs of either single (') or double quotes ("). Therefore, the correct code would be :

print("Programming is fun")
print("Python") 
print("Computer Science")

Python treats capital and small letters as different

Reason — Python is a case-sensitive language. This means that Python differentiates between capital and small alphabets.

Interactive mode

Reason — Interactive mode of Python gives instant result of typed statement.

Python was developed in February 1991.

Guido Van Rossum is the developer of Python. ABC language and Modula-3 contributed to Python as a programming language.

Python is free and open-source means that it is available to anyone at no cost, and its source code can be freely accessed, modified, and distributed by anyone.

Yes, Python is a case-sensitive language. This means that Python differentiates between uppercase (capital) and lowercase (small) letters.

IDLE is a simple Integrated Development and Learning Environment that comes with Python. The most important feature of IDLE is that it is a program that allows the user to edit, run, browse and debug a Python program from a single interface.

Printing in Python refers to using the print() function to output information to the console. The print() function takes one or more arguments, converts each argument to a string (if necessary), and displays them as text. On the other hand, displaying can be a more general term that encompasses presenting information or output in various forms, not limited to just text output in the console.

The salient features of Python are as follows:

1. Python is an interpreted, interactive, directly executed language with a pre-compiled code. This means that it is processed at runtime by the interpreter and we need not compile our program before executing it.
2. It is a loosely type object-oriented programming language with a few keywords, simple English-like structure and is easy to learn.
3. It is a free, open-source and portable language having a large repository of libraries.
4. It takes less time to develop as Python programs are typically 3 to 5 times shorter than the equivalent programming languages. This is because of its built-in, high-level data types and its dynamic typing.
5. It is extensible/extendable and highly efficient as there is no wastage of time in declaring the types of variables or arguments.
6. It supports GUI (Graphical User Interface) and garbage collection (better memory management).
7. It is easily compatible with other languages like C, C++, Core Java etc.
8. Python is used for both scientific and non-scientific programming.

Python is platform-independent and a cross-platform language because it can run on various operating systems, such as Windows, macOS, Linux etc.

Advantages of Python programming language are:

1. Easy to Use — Python is compact, programmer-friendly and very easy to use object oriented language with very simple syntax rules.
2. Expressive Language — Python is an expressive language, it takes fewer lines of codes to represent the same syntax.
3. Interpreted Language — Python is an interpreted language, not a compiled language. It makes Python an easy-to-debug language and thus suitable for beginners to advanced users.
4. Completeness — Python has a rich standard library that provides modules for most types of required functionality like emails, web-pages, databases, GUI development, network connections, etc.
5. Cross-platform Language — Python can run equally well on variety of platforms — Windows, Linux/UNIX, Macintosh, supercomputers, smart phones, etc.
6. Free and Open Source — Python language is freely available along with its source-code.
7. Variety of Usage/Applications — Python has evolved into a powerful, complete and useful language over these years. These days Python is being used in many diverse fields/applications, some of which are Scripting, Web Applications, Game development, Database Applications, System Administrations, Rapid Prototyping, GUI Programs.

We can work in Python in two ways:

1. Interactive mode (also called Immediate mode)
2. Script mode

Interactive mode is useful for testing code. We can type the commands one by one and get the result of error immediately for each command. Disadvantages of Interactive mode are that it does not save commands in form of a program and also output is sandwiched between commands.

Some limitations of Python programming language are:

1. Not the Fastest Language — As Python is an interpreted language so its execution-times are not that fast compared to some compiled languages.
2. Lesser Libraries than C, Java, Perl — Library collection of C, Java, Perl is better than Python.
3. Not strong on Type-Binding — Python interpreter is not very strong on catching 'Type-Mismatch' issues.
4. Not easily convertible — Translating Python programs to other languages is difficult due to its lack of syntax.

In script mode, we write a Python program in a file and execute it to display the output and in interactive mode, we use the Python prompt '>>>' to start typing commands and see immediate output.

(a)

>>> 3 + 8.0 + 6 * 12

(b)

>>> print(16 + 5.0 + 44.0)

2 5

In the above code, num1 is initially assigned the value 4. Then, num2 is set to num1 + 1, resulting in num2 being 5. Subsequently, num1 is reassigned the value 2, changing its original value from 4 to 2. When print(num1, num2) is executed, it displays the current values of num1 and num2, which are 2 and 5, respectively.

Interactive Mode:

>>> print("Python is easy to learn and write.")
>>> print("It allows us to work in two modes: Interactive mode and Script mode.")
>>> print("Interactive mode is also known as Python Shell and Script mode is also known as Python Editor.")
>>> print("It is a platform-independent language.")
>>> print("We find it interesting to work with Python.")

Script Mode:

print("Python is easy to learn and write.")
print("It allows us to work in two modes: Interactive mode and Script mode.")
print("Interactive mode is also known as Python Shell and Script mode is also known as Python Editor.")
print("It is a platform-independent language.")
print("We find it interesting to work with Python.")

full_name = "Jeevika Sharma"
birthday = "January 17, 2000"

print("Full Name:", full_name)
print("Birthday:", birthday)

Full Name: Jeevika Sharma
Birthday: January 17, 2000

(a) It raises TypeError as 'n' is an invalid keyword argument for print() function.

(b) 17

(c) 4.2 hello 4 world 7.5

(a) 46

(b) 100

21.99113
I am a class XIstudent
I am
class XI student
I'm 16 years old

True

Reason — Python is a dynamically typed language because variables do not need to be declared with a specific type. Instead, the type of a variable is determined at runtime based on the value assigned to it.

False

Reason — For repeating or recalling the last command in the Python shell, the correct key is the up arrow key (↑).

False

Reason — In Python, print and Print are not the same because Python is a case-sensitive language.

True

Reason — The sep argument in the print() function is used to specify a string that separates the objects being printed. The default separator is a space.

False

Reason — Python is an interpreted high-level language.

True

Reason — Python is a cross-platform language because it can run on various operating systems, such as Windows, macOS, Linux, etc.

True

Reason — Python is an interpreted language, not a compiled language. This means that Python code is executed line by line at runtime by an interpreter, without the need for a separate compilation step to machine code.

True

Reason — Python is free and open-source, meaning anyone can freely use, distribute, and modify it. It is also highly portable, running on various platforms such as Windows, macOS, Linux, and others.

True

Reason — Python Editor refers to a mode in IDLE where we can write and run Python scripts, also known as Script mode.

True

Reason — Ctrl+Q shortcut key combination is used to exit Python.