Did you know that a data analyst makes, on average 7 to 25 LPA annually in India? This is a high wage compared to other tech positions. In India, where the demand for skilled data analysts is reasonably high, and the supply of experienced developers is relatively low, data analytics is one of the fastest-growing technologies. SkillSafari offers a program that allows you to learn data analytics in a structured manner from scratch. This article reviews some of the Top 10 Data Analyst Interview Questions and Answers for Newbies.
What is data analysis?
Data analysis is analyzing, modelling, and interpreting data to make inferences or conclusions. Every industry uses it, which explains the high demand for data analysts. Playing around with copious amounts of data and looking for undiscovered insights are the sole duties of a data analyst.
What is the K-means algorithm?
Based on how near or far apart the data points are from one another, the K-means algorithm groups the data into various sets. In the k-means algorithm, the letter "k" denotes the number of clusters and tries to keep each collection reasonably separated.
What is hierarchical clustering?
With the help of the algorithm known as hierarchical clustering, or hierarchical cluster analysis, similar objects are sorted into clusters. It produces a collection of sets distinct from one another and collectively containing identical entities.
Different statistical techniques in data analytics?
There are three different types of statistical methods in data analytics. They are
Correlation is where the establishment and measurement between two variables happen.
The regression technique allows you to find if the evolution of one variable affects the other.
Time series analysis is used to analyze future values based on the sequence of past values.
Steps Involved in Analytics Projects?
It's the most fundamental question asked in any data analyst job interview. The various steps involved in joint analytics projects start with understanding the problems and defining the goals to plan for the solution, then move on to the collection of data, where you will gather data from various sources, and the third step is cleaning the data to remove the unwanted and missing values and make it ready for analytics process, After cleaning the data, we can start implementing the exploration of the data by using data visualization, business intelligence tools, data modelling, and predictive analysis. The final step is the interpretation of trends to find out about future trends and hidden patterns.
What is an outlier?
A data point that significantly deviates from the dataset's average features is an outlier.
Box plot method:
If a given value is outside the range of the dataset's top or bottom quartiles, it is categorized as an outlier.
Standard deviation method:
It designates a value as an outlier if it differs significantly from or from the mean of the data +/- (3*standard deviation).
What is a dual-axis chart in Tableau?
When two measures are shown on two different axes, the chart is referred to as a dual-axis chart in Tableau. It compare two measurements in a single chart. For instance, you could make a dual-axis chart that displays a product's sales and profit progression.
Conclusion:
The questions mentioned above are the primary and most important questions you may face in an interview as a fresher. Learning these technologies on your own will be difficult. At Skillsafari, we have created a data analytics program where you will learn the concepts from scratch and build your customized portfolio with 100% placement assistance. To learn more about our Alchemyst 2.O program, visit our website given below: https://skillsafari.in/learning-hub/