Rapid Fire on Data Analytics

A critical data analyst interview question you need to be aware of. A Data Analyst can confront the following issues while performing data analysis: Presence of duplicate entries and spelling mistakes. These errors can hamper data quality. Poor quality data acquired from unreliable sources. In such a case, a Data Analyst will have to spend … Read more

The core steps of a Data Analysis project include: The foremost requirement of a Data Analysis project is an in-depth understanding of the business requirements. The second step is to identify the most relevant data sources that best fit the business requirements and obtain the data from reliable and verified sources. The third step involves … Read more

To tackle multi-source problems, you need to: Identify similar data records and combine them into one record that will contain all the useful attributes, minus the redundancy. Facilitate schema integration through schema restructuring. Tackling multi-source data problems in data analytics requires a structured approach. Here’s a step-by-step guide to tackling such problems: Define the Problem: … Read more

Series analysis can usually be performed in two domains – time domain and frequency domain. Time series analysis is the method where the output forecast of a process is done by analyzing the data collected in the past using techniques like exponential smoothening, log-linear regression method, etc. Time series analysis is a statistical technique used … Read more

This is one of the important data analyst interview questions. When two separate keys hash to a common value, a hash table collision occurs. This means that two different data cannot be stored in the same slot. Hash collisions can be avoided by: Separate chaining – In this method, a data structure is used to … Read more