FREE Master of Data Science Questions and Answers
What phase of the data science process comes first?
Understanding business requirements and goals as well as selecting a business-related hypothesis to test are the first steps in creating a machine learning or statistical model that provides relevant data. Even when data scientists aren't given any particular business questions to respond to, that is still the case. Data collection and preparation, testing of several analytical models, use of the best model to analyze the data, and presentation of the findings to business executives and operational staff are the next steps in the data science process.
What is the main distinction between supervised and unsupervised learning in machine learning?
There are two types of machine learning: supervised and unsupervised. In supervised learning, training data that has been labeled and classified is used to instruct a machine learning model to generate a certain output. The objective is to make it possible for the model to find particular links and patterns in bigger data sets. On the other hand, in unsupervised learning, a data scientist applies an algorithm to unlabeled and unclassified training data. The machine learning model gathers data together and finds similarities and patterns on its own because the desired output is undefined. A hybrid method called semi-supervised learning involves labeling some of the training data.
What distinguishes a data scientist from a data engineer in particular?
Data scientists are in charge of finding, gathering, and evaluating pertinent data. However, they frequently receive support from data engineers, who facilitate analytics projects by managing a large portion of the preliminary work necessary to put data in the hands of data scientists. They might construct data pipelines to combine data from many sources, assist in integrating, cleaning, and preparing the data for analysis, or assist in the deployment and upkeep of analytical models. Data analysts, machine learning engineers, and data architects are frequently included on a data science team because they support the analytics process as well.
False or true? For success, data scientists often need a mix of technical, nontechnical, and the right personality attributes.
In general, data scientists need a wide range of abilities and traits. In addition to technical expertise in programming, predictive modeling, machine learning, deep learning, artificial intelligence, data preparation, and other fields, this also includes understanding of statistics and mathematics. The top performers also possess a variety of soft talents and characteristics, including curiosity, problem-solving and critical thinking skills, as well as communication and teamwork ability. To guarantee that data science activities yield accurate and significant results, business understanding is also crucial.
Which of the following best sums up data science's main objective?
A data science initiative's major goal is to analyze data in a way that gives a business relevant information. There may be a combination of structured, unstructured, and semistructured data in that, generally in vast quantities that make it challenging to extract insight from the data without the aid of sophisticated analytics techniques. Anomaly detection, which helps with fraud detection and cybersecurity initiatives, pattern recognition for examining customer purchases, stock trading, and other use cases, and predictive modeling of consumer behavior, market trends, and financial risks are some common data science applications in businesses.
Which programming language do data scientists use the most frequently?
According to a yearly poll on data science and machine learning done by Google subsidiary Kaggle, Python is the computer language that data scientists use the most frequently, followed by SQL and R. Among the best tools and technologies for data scientists is Julia, a more recent language. The list includes a range of Python frameworks and modules that can be used to enable analytics applications and data visualization, reflecting Python's position as the top language.
Which of the following statistical and analytical methods are frequently employed by data scientists?
Key data science approaches used in analytics applications to find links between distinct data items include classification, regression, and clustering. Examples include k-means clustering and hierarchical clustering, linear regression and multivariate regression, and naive Bayes classifiers and decision trees for categorizing data. Another method used to discover relationship rules between related data points is association analysis, which is similar to clustering.