What is the primary purpose of a debugger in Python development?
- To format code for readability
- To identify and fix code errors
- To measure code performance
- To write unit tests
The primary purpose of a debugger in Python development is to identify and fix code errors (bugs). Debuggers allow developers to step through code, inspect variables, and understand the flow of their programs to pinpoint and resolve issues. While unit tests are important, debugging is a distinct process.
To enable database migrations in Flask, the ____ extension can be used.
- Flask-Database
- Flask-Migrate
- Flask-ORM
- Flask-SQLAlchemy
To enable database migrations in Flask, the Flask-Migrate extension is used. Flask-Migrate is an extension that integrates the Alembic database migration framework with Flask applications, allowing you to manage database schema changes easily.
To find the shortest path in a graph with non-negative edge weights, the ____ algorithm can be used.
- Binary
- Bubble
- Dijkstra's
- Quick
To find the shortest path in a graph with non-negative edge weights, you can use Dijkstra's algorithm. This algorithm efficiently calculates the shortest path from a source vertex to all other vertices in a weighted graph.
To get all the keys from a Python dictionary, you can use the ____ method.
- get()
- items()
- keys()
- values()
To obtain all the keys from a Python dictionary, you should use the keys() method. This method returns a view object that displays a list of all the keys in the dictionary.
To represent a constant property in a Python class, you would typically use _____.
- const
- final
- readonly
- static
In Python, to represent a constant property in a class, you would typically use the readonly keyword. It ensures that the property cannot be modified after it's assigned a value.
The _____ method in a metaclass is executed when a new class is created.
- class
- init
- metaclass
- new
In Python, the __new__ method in a metaclass is executed when a new class is created. It allows you to customize the creation process of classes before __init__ is called.
The _____ method in Python is used to delete the object and perform the cleanup activities.
- del
- delete
- destruct
- finalize
In Python, the finalize method is used to perform cleanup activities and delete an object. This method is called automatically by the garbage collector before reclaiming the memory used by the object.
The algorithm that follows the 'divide and conquer' strategy is ____.
- Binary Search
- Bubble Sort
- Merge Sort
- Quick Sort
The algorithm that follows the 'divide and conquer' strategy is Quick Sort. In Quick Sort, the array is divided into smaller subarrays, sorted separately, and then combined.
The process of visiting all the nodes of a tree and performing an operation (such as a print operation) is called ____.
- Pruning
- Rotating
- Sorting
- Traversal
The process of visiting all the nodes of a tree and performing an operation is known as tree traversal. Tree traversal is essential for various tree-based algorithms and operations like printing the contents of a tree.
To concatenate two tuples, you can use the ____ operator.
- -
- &
- *
- +
In Python, you can concatenate two tuples using the + operator. The + operator is used for concatenating sequences, including tuples. For example, tuple1 + tuple2 will combine the elements of both tuples.