When creating a placeholder for a function or loop that you will implement in the future, you should use the _______ statement.
- hold
- ignore
- pass
- skip
The pass statement is used as a placeholder for code that will be implemented in the future. It essentially does nothing and is often used to avoid syntax errors.
Which of the following decorators is used to define a setter method for a property in Python?
- @getter
- @property
- @setter
- @setter and @getter
The @property decorator is used to define a getter method for a property. To define a setter, you would use @.setter.
Which built-in function in Python can be used to get the data type of an object?
- dtype()
- type()
- typeof()
- typeofobject()
The type() function is used to determine the data type of an object in Python. It returns a type object, which represents the data type of the given object.
If you have a function named fun inside a module named mod, how can you import it directly?
- from mod import fun
- fun(mod)
- import fun from mod
- include mod.fun
To import a specific function from a module, you use the syntax from mod import fun. This allows you to use fun directly in your code.
A program is intended to print all even numbers between 1 to 10 but instead, it prints all numbers between 1 to 10. What control structure might be missing or misused?
- Conditional Statement
- For Loop
- Range Function
- While Loop
If a program is printing all numbers between 1 to 10 instead of just even numbers, a conditional statement might be missing or misused. Conditional statements are used to specify different actions based on certain conditions, and they are essential for filtering and printing even numbers in this case.
You have a program that checks for a user's age to determine the price of a movie ticket. How would you structure the conditional statements to determine if a user gets a discount based on their age?
- if age < 10 or age > 65:
- if age == 10 or age == 65:
- if age > 10 and age < 65:
- if age >= 10 and age <= 65:
To determine if a user gets a discount based on age, you should use 'if' statements with logical OR operators. This way, you can identify both children under 10 and seniors above 65 who are eligible for a discount.
In the context of method overloading, what does the *args syntax in Python signify?
- It represents default argument values
- It represents keyword arguments in a function signature
- It signifies that the function accepts a variable-length non-keyword argument list
- It signifies that the function cannot accept any arguments
In Python, the *args syntax in a function signature indicates that the function accepts a variable-length non-keyword argument list. This allows you to pass a varying number of positional arguments to the function. It's commonly used in method overloading to handle multiple argument scenarios.
What happens if the base class method is private, and you try to override it in a derived class?
- Compilation error
- The base class method is called
- The derived class method is overridden
- The derived class method is private
If the base class method is private, it cannot be overridden in the derived class. Attempting to do so will result in a compilation error, as private methods are not accessible outside the class.
How are correlation coefficients affected when transformations are applied to the data?
- Correlation coefficients can change
- Correlation coefficients can decrease
- Correlation coefficients can increase
- Transformations do not affect correlation coefficients
Correlation coefficients can change when transformations are applied to the data. The exact effect depends on the transformation and the nature of the data. Transformations can linearize relationships, reduce skewness, or spread out data that is concentrated at a single point, all of which can change the correlation coefficient.
For a multimodal distribution, which measure of central tendency may not be very informative?
- Mean
- Median
- Mode
- nan
For a multimodal distribution (distribution with more than one peak), the "Mean" may not be very informative. In such distributions, the mean may not be representative of any central value, as it can be influenced by the multiple peaks in the data, leading to an unrepresentative measure of the center.