Which method can be used to get the value for a given key from a dictionary, and if the key is not found, it returns a default value?
- fetch()
- get()
- retrieve()
- value()
The get() method of a dictionary allows you to retrieve the value associated with a given key. If the key is not found, it returns a default value, which can be specified as a second argument to get(). This is a useful way to avoid KeyError exceptions. The other options are not valid methods for this purpose.
Which method in Scikit-learn would you use to tune hyperparameters of a model?
- fit()
- gradient_boosting()
- GridSearchCV
- predict()
GridSearchCV is used in Scikit-learn for hyperparameter tuning. It performs an exhaustive search over specified hyperparameter values to find the best combination for the model.
Which method is commonly used to send data from a web form to a Python back-end?
- FETCH
- GET
- POST
- PUT
The common method used to send data from a web form to a Python back-end is POST. When a user submits a form, the data is sent to the server using the POST method, which allows for secure transmission of sensitive information. GET is used to retrieve data, while PUT and FETCH serve other purposes in web development.
Which of the following data structures is best suited for a First In First Out (FIFO) approach?
- Binary Tree
- Hash Table
- Queue
- Stack
A queue is a data structure that follows the First In First Out (FIFO) approach. It means that the first element added to the queue will be the first one to be removed. Queues are often used in scenarios like scheduling tasks or managing resources in a sequential manner.
Which of the following sorting algorithms is most efficient for small-sized data sets?
- Bubble Sort
- Insertion Sort
- Merge Sort
- Quick Sort
Insertion sort is the most efficient sorting algorithm for small-sized data sets. It has a simple implementation and performs well when the number of elements is small. Other sorting algorithms like Quick Sort and Merge Sort are more efficient for larger data sets.
Which Pandas function is used to read a CSV file into a DataFrame?
- read_csv()
- read_excel()
- read_json()
- read_sql()
The correct function to read a CSV file into a DataFrame in Pandas is read_csv(). It's used to load data from a CSV (Comma-Separated Values) file into a tabular data structure.
Which Python built-in function will you use to sort a list of numbers in ascending order?
- arrange()
- order()
- sort()
- sorted()
To sort a list of numbers in ascending order, you should use the sorted() function. The sort() method is used for in-place sorting, whereas sorted() returns a new sorted list, leaving the original list unchanged.
Which Python data structure is suitable for storing multiple data types and allows duplicate elements?
- Dictionary
- List
- Set
- Tuple
In Python, a list is a versatile data structure that can store multiple data types and allows duplicate elements. Lists are ordered and mutable, making them suitable for a wide range of use cases.
Which Python entity is primarily affected or modified by a metaclass?
- Classes
- Functions
- Modules
- Variables
Metaclasses primarily affect or modify classes. They define how classes themselves are created and behave, allowing you to add, modify, or replace class attributes and methods.
Which Python feature would you use to modify the behavior of a function or method?
- Decorators
- Encapsulation
- Inheritance
- Polymorphism
In Python, decorators are used to modify the behavior of functions or methods. They allow you to add functionality to existing code without modifying its structure. Decorators are often used for tasks like logging, authentication, and more.