If you're looking for Data Analyst Interview Questions & Answers for Experienced or Freshers, you are at the right place. There are a lot of opportunities from many reputed companies in the world. According to research Data Science Market expected to reach $128.21 Billion with 36.5% CAGR forecast to 2022. So, You still have the opportunity to move ahead in your career in Data Analytics. Mindmajix offers Advanced Data Analyst Interview Questions 2021 that help you in cracking your interview & acquire a dream career as Data Analyst.
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Ans: The primary responsibilities of a data analyst are as follows:
A data analyst is responsible for all data-related information and the analysis is needed for the staff and the customers.
Ans: The following are the prerequisites for an individual to become a data analyst:
Ans: The various steps involved in the analytics project are :
Ans: So data cleansing is also called as data cleaning. During this process, the inconsistency that is identified is sorted out and all the possible errors are also taken care during this process. All of these steps focus towards improving the data quality.
Ans: The logistic regression is nothing but one of the regression models that is used for data analysis purposes. This type of regression method is called a statistical method where one of the data elements is an independent variable that ultimately helps you with the outcome.
Ans: They are various tools that are available in data analysis, they are as follows:
Ans: The data mining is a process where it focuses on cluster analysis. It is considered as a process of analyzing large data sets and out of which they will be able to identify unique patterns and also help the user to understand and establish a relationship to solve any obstacles through analyzing data.
Data mining is also used to predict future trends within organizations
Ans: The four stages of data mining are as follows:
Ans: The data profiling is nothing but a process of validating or examining the data that is already available in an existing data source, so the data source can be an existing database or it can be a file. The main use of this is to understand and take an executive decision whether the data that is available is readily used for other purposes.
Ans: The list of common problems that most of the time data analyst actually oversee is nothing but:
Ans: Hadoop and MapReduce is the programming framework that was completely developed by Apache where large sets of data for an application is been processed under a distributed computing environment.
Related Article: Advantages of Hadoop MapReduce Programming
Ans: The two data validation methods that are actually used by the data analysts are:
Ans: Well, Collaborative filtering is nothing but a process or an algorithm that actually helps the user with recommendation based responses to the user based on analyzing user behavioral data.The important components of collaborative filtering are as follows:
For example: if we have to explain collaborative filtering then we can consider our browsing history pattern. Based on our browsing interest pattern we will be getting “recommended products for you” ad while you are browsing online shopping sites.
So next time when you see some of your browsed products are shown as ads remember that is Collaborative Filtering process
Ans: The Map-Reduce is nothing but a programming model where it is associated with process implementation and also analyzing large chunks of data sets parallelly. Using this programming model large data sets are segregated into small chunks of data sets which are analyzed parallelly to yield the outcome.
Ans: The clustering is defined as a process of grouping a definite set of objects based on certain predefined parameters. This is one of the value-added data analysis technique that is used industry-wide while processing a large set of data.
Ans: The applications that are based on clustering algorithm is listed below:
Ans: The properties of the clustering algorithm are as follows:
Ans: The Imputation process is nothing but a process of replacing missing data elements with substituted values. They are two types of imputation techniques that are available for use:
Ans: The criteria or standard for having a good data model is as follows:
Ans: The list of tools that are used in Big data is as follows:
Ans: The following are good to have skills for an individual which will be a value ad for the data analyst, they are following:
Predictive Analysis: This is a major game changer within process improvisation
Presentation Skills: This is vital for an individual to make sure that they are able to showcase a face to their data analysis. This can be done by using some of the reporting tools
Database knowledge: This is essential because it is widely used in day to day operational tasks for the data analyst.
Ans: The best way to deal with multi-source problems is:
Ans: The data screening is a process where the entire set of data is actually processed by using various algorithms to see whether we have any questionable data. This type of values is handled externally and thoroughly examined.
Ans: The best practices that are followed when it comes to data cleansing is as follows:
Ans: The data analysis is nothing but an in-depth study the entire data set that is available in the database.
Ans: The K-mean algorithm is one of the famous partitioning methods. Within this, the objects belong to a specific k group.
Within the k-mean algorithm:
Ans: The Hierarchical clustering algorithm is nothing but a process where it actually combines and divides the existing groups. So based on this a hierarchical structure the groups are assigned to a specific order and structure.