Python Basics: Constants, Variables, and More

Which of the following is a correct way to define a constant in Python?

• `const PI = 3.14`

• `PI = 3.14`

• `constant(PI) = 3.14`

• `#define PI 3.14`

What is the correct way to declare a variable `x` with the value `10` in Python?

• `int x = 10`

• `x := 10`

• `x = 10`

• `var x = 10`

Which of the following is used to print a message in Python?

• `print("Hello, World!")`

• `echo "Hello, World!"`

• `System.out.println("Hello, World!")`

• `printf("Hello, World!")`

Which of the following data types does not exist in Python?

• `list`

• `tuple`

• `array`

• `set`

How do you concatenate two strings, `a` and `b`, in Python?

• `a + b`

• `a.concat(b)`

• `concat(a, b)`

• `a & b`

What is the output of the following code snippet? `print("Python"[1:3])`

• `Pyt`

• `yth`

• `yt`

• `tho`

Which of the following is the correct way to convert the string `"123"` to an integer in Python?

• `int("123")`

• `parseInt("123")`

• `"123".toInt()`

• `convert.toInt("123")`

What will be the data type of the variable `x` after the following assignment: `x = 3.14`?

• `int`

• `float`

• `string`

• `char`

Which of the following is a valid variable name in Python?

• `3x`

• `_my_var`

• `my-var`

• `None`

What does the `len()` function return when applied to the string `"Hello, World!"`?

• `11`

• `12`

• `13`

• `14`