Python Fundamentals

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Questions and Answers

Who developed Python Programming Language?

  • Niene Stom
  • Rasmus Lerdorf
  • Wick van Rossum
  • Guido van Rossum (correct)

Which of the following is a valid way to comment in Python?

  • `# This is a comment` (correct)
  • `/* This is a comment */`
  • `<!-- This is a comment -->`
  • `// This is a comment`

What is the result of the following expression in Python: 5 + 2 * 3

  • 21
  • 1
  • 7
  • 11 (correct)

What will be the output of the following code snippet?

a = 5
b = 2
print(a // b)

<p>2 (C)</p> Signup and view all the answers

What is the output of the following code?

num1 = "5"
num2 = 3
result = num1 * num2
print(result)

<p>&quot;555&quot; (C)</p> Signup and view all the answers

What is the output of the following code?

value = 2 + 3 * 4 / 2
print(value)

<p>8.0 (C)</p> Signup and view all the answers

What is the output of the following code?

x = "5"
y = "2"
print(x + y)

<p>&quot;52&quot; (A)</p> Signup and view all the answers

Which of the following statements is true about Python variables?

<p>Python variables are case-sensitive. (C)</p> Signup and view all the answers

Which of the following is the correct way to take user input in Python?

<p><code>input()</code> (C)</p> Signup and view all the answers

Which of the following is the correct type conversion for converting a floating-point number to an integer in Python?

<p><code>int(float_num)</code> (D)</p> Signup and view all the answers

What is the value of result in the following code?

num = "8"
result = int(num) + 5
print(result)

<p>13 (D)</p> Signup and view all the answers

Find the output of the below python code:

str = "GFG"
print(not (not(str and "")))

<p>False (C)</p> Signup and view all the answers

Find the output of the below python code:

print(~(~2))

<p>2 (C)</p> Signup and view all the answers

What is the result of 10 > 5 and 5 < 3?

<p>False (C)</p> Signup and view all the answers

Flashcards

Who developed Python?

Python was developed by Guido van Rossum.

Python comment syntax

The correct way to comment in Python is using the # symbol. Anything following # on a line is ignored by the interpreter.

Python expression: 5 + 2 * 3

In Python, operator precedence follows the PEMDAS rule. Multiplication is performed before addition.

What is floor division (//)?

The // operator in Python performs floor division, returning the integer part of the division.

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String multiplication in Python

Multiplying a string by an integer repeats the string that many times. '5' * 3 gives '555'.

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Evaluate: 2 + 3 * 4 / 2

Python follows PEMDAS. Multiplication and division are executed before addition.

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String concatenation

In Python, adding strings concatenates (joins) them.

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Are Python variables case-sensitive?

Python variables are case-sensitive, meaning myVar and myvar are treated as different variables.

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Taking user input

The input() function is used to take user input in Python.

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Convert float to int

int(float_num) converts a floating-point number to an integer in Python.

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int("8") + 5

The int() function converts the string to an integer, allowing mathematical operations. So int("8") + 5 equals 13.

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Truthy and Falsy values with "GFG"

In Python, any non-empty string is considered True. In this case not(str and "") simplifies to False.

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What does ~~2 equal?

The bitwise negation operator (~) inverts the bits of a number. ~2 is -3 and ~(-3) is 2.

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10 > 5 and 5 < 3

In Python, the 'and' operator returns True only if both conditions are true, otherwise it returns False.

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Study Notes

  • Quiz on Python Fundamentals

Python Development

  • Guido van Rossum developed the Python programming language.

Comments in Python

  • # This is a comment is a valid way to comment in Python.

Python Expressions

  • The result of the expression 5 + 2 * 3 in Python is 11 due to operator precedence.

Python Code Output

  • The code snippet a = 5; b = 2; print(a // b) will output 2, as // performs integer division.
  • Given the code num1 = "5"; num2 = 3; result = num1 * num2; print(result), the output is "555" because it concatenates the string "5" three times.
  • For the code value = 2 + 3 * 4 / 2; print(value), the output is 8.0 due to operator precedence.
  • Given the code x = "5"; y = "2"; print(x + y), the output is "52" as it concatenates the strings.

Python Variables

  • Python variables are case-sensitive.

User Input

  • input() is the correct way to take user input in Python.

Type Conversion

  • int(float_num) is the correct type conversion for converting a floating-point number to an integer in Python.

Further Python Code Examples

  • Given the code num = "8"; result = int(num) + 5; print(result), the value of result is 13.
  • The output of the code str = "GFG"; print(not (not(str and ""))) is False.
  • The output of the code print(~(~2)) is 2.

Boolean operations

  • The result of 10 > 5 and 5 < 3 is False.

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