O(n log n)

O(1)

O(n)

O(log n)

Normalization in database design is the process of organizing data to minimize redundancy and dependency.

A method to increase data redundancy

A technique for data encryption

A way to merge multiple databases

NoSQL databases require a strict schema.

SQL databases are non-relational with a fixed schema.

SQL databases are relational with a fixed schema, while NoSQL databases are non-relational with flexible schemas.

SQL databases are designed for unstructured data.

Overfitting happens when a model is trained on too much data, leading to confusion.

Overfitting is when a model performs well on training data but poorly on unseen data due to excessive complexity.

Overfitting is when a model performs poorly on both training and unseen data due to lack of data.

Overfitting occurs when a model is too simple and cannot capture the underlying patterns.

Supervised learning, Unsupervised learning, Reinforcement learning

Transfer learning

Deep learning

Semi-supervised learning

To perform web scraping tasks

The purpose of the pandas library in Python is to facilitate data manipulation and analysis.

To create visualizations of data

To manage databases in Python

Import Matplotlib, prepare data, use plt.scatter(x, y), and plt.show()

Call plt.draw() before plt.show()

Use plt.plot(x, y) instead of plt.scatter(x, y)

Import Seaborn instead of Matplotlib

CSS is a programming language; JavaScript is a markup language.

CSS is for styling; JavaScript is for interactivity.

CSS handles data storage; JavaScript manages server requests.

CSS is used for backend development; JavaScript is for database management.

Inheritance allows a subclass to inherit properties and behaviors from a superclass, promoting code reuse and establishing a hierarchical relationship.

Inheritance allows a superclass to inherit properties from a subclass.

Inheritance is used to create multiple instances of a class.

Inheritance is a method to delete properties in Java.

A function in Python is defined using the 'def' keyword, followed by the function name and parentheses.

A function in Python is created with the 'create' keyword.

A function in Python is defined using the 'func' keyword.

A function in Python is defined by using the 'define' keyword.

array

function

undefined, null, boolean, number, string, symbol, object

date

The purpose of a primary key in a database is to uniquely identify each record in a table.

To store large amounts of data efficiently.

To group related records together in a table.

To define the structure of a database table.

The process of training a machine learning model involves data collection, preprocessing, feature selection, model selection, training, validation, testing, and deployment.

Feature selection is the last step in the training process.

Data collection is not necessary for training a model.

Model training only requires a single dataset without validation.

Supervised learning can only be applied to images, while unsupervised learning can only be applied to text.

Supervised learning requires no data for training, while unsupervised learning requires labeled data.

Supervised learning uses labeled data for training, while unsupervised learning uses unlabeled data to find patterns.

Supervised learning is used for clustering, while unsupervised learning is used for classification.

Replace missing data with the maximum value of the dataset.

Assume all missing data is zero.

You can handle missing data by removing, imputing, or using algorithms that support it.

Ignore the missing data and proceed with analysis.

The 'for' loop is used to iterate over a sequence or iterable in Python.

To handle exceptions in Python.

To create a new class in Python.

To define a function in Python.

Responsive design in CSS ensures that web content adjusts seamlessly across different devices and screen sizes.

Responsive design requires separate CSS files for each device.

Responsive design is about using fixed layouts for websites.

Responsive design only applies to mobile devices.

A class is a type of object.

A class is a blueprint for creating objects, while an object is an instance of a class.

An object can exist without a class.

A class is a specific instance of an object.

You declare a variable using 'define'.

You declare a variable in JavaScript using 'var', 'let', or 'const'.

You can only use 'let' to declare variables.

Variables are declared with 'declare'.