To represent binary data in Python, you would use the ____ data type.
- binary
- binary_data
- bit
- bytes
In Python, the bytes data type is used to represent binary data. It is a sequence of bytes, which is often used for working with binary files, network protocols, and other low-level data operations.
The ____ built-in function is used to convert a variable to an integer data type, if possible.
- convert()
- int()
- parse()
- str2int()
The int() built-in function in Python is used to convert a variable to an integer data type. If the variable can be converted to an integer, it will do so; otherwise, it will raise a ValueError if the conversion is not possible.
In Python, the ____ method is used to get the length of a string.
- count()
- len()
- size()
- str_len()
In Python, the len() method is used to get the length (number of characters) of a string. It is a built-in function that works with strings, lists, tuples, and other iterable objects.
The ____ keyword is used to create a new variable and assign it a specific data type.
- define
- int
- type
- var
In Python, the type keyword is used to create a new variable and assign it a specific data type. For example, x = type(5) would assign the integer type to the variable x.
To concatenate two strings in Python, you can use the ____ operator.
- -
- *
- /
- +
In Python, you can concatenate two strings using the + operator. For example, "Hello, " + "world" would result in "Hello, world".
In Python, a ____ is a built-in data type used to store multiple items in a single variable.
- dictionary
- list
- string
- tuple
In Python, a list is a built-in data type that is used to store multiple items in a single variable. Lists are ordered and mutable, making them suitable for a wide range of applications.
How can you create a new instance of a custom class and assign it to a variable in Python?
- class.new()
- MyClass()
- MyClass.new()
- new MyClass()
In Python, you create a new instance of a custom class using the class name followed by parentheses. This creates a new object of the class and can be assigned to a variable.
What is the difference between is and == when comparing variables in Python?
- is compares object identity, checking if two variables refer to the same object. == compares object values, checking if two variables have the same content.
- is compares object values, checking if two variables have the same content. == compares object identity, checking if two variables refer to the same object.
- is is used for deep equality comparisons, while == is used for shallow equality comparisons.
- is is used for strict equality comparisons, while == is used for loose equality comparisons.
This means that is checks if both variables point to the same memory location, while == checks if the values of the objects are equal.
How would you define a variable that can store a lambda function calculating the square of a number in Python?
- def square_lambda(x): return x * x
- let square_lambda = (x) => x * x;
- square_lambda = lambda x: x * x
- var square_lambda = function(x) { return x * x; }
In Python, you can define a variable to store a lambda function using the lambda keyword, as shown in option 1. This creates a function that takes an argument x and returns its square.
Which Python built-in function would you use to find the type of a variable?
- datatype()
- gettype()
- type()
- typeof()
In Python, the type() function is used to find the type of a variable. For example, type(x) will return the type of the variable x. The other options are not valid Python functions for this purpose.