10+ Data Analyst Trainee Interview Questions and Answers

Joins in SQL combine data from two or more tables based on related columns.

• INNER JOIN: Returns records with matching values in both tables. Example: SELECT * FROM A INNER JOIN B ON A.id = B.id;

• LEFT JOIN: Returns all records from the left table and matched records from the right table. Example: SELECT * FROM A LEFT JOIN B ON A.id = B.id;

• RIGHT JOIN: Returns all records from the right table and matched records from the left table. Example: SELECT * FROM A RIGHT JOIN B ON A.id = ...read more

Inner join returns only the matching records from both tables, while left join returns all records from the left table and matching records from the right table.

• Inner join combines rows from both tables based on a common column.

• Left join returns all rows from the left table and matching rows from the right table.

• Inner join is used to retrieve only the matching records, while left join is used to retrieve all records from the left table.

• In inner join, if there is no match, the...read more

Fetch the latest satat ordered by data using SQL query.

• Use the SELECT statement to fetch data from the table.

• Use the ORDER BY clause to sort the data by the 'data' column in descending order.

• Use the LIMIT clause to retrieve only the latest satat.

I analyse things around me by observing, researching, and applying logical reasoning.

• I observe my surroundings and gather information

• I research and gather more information to gain a better understanding

• I apply logical reasoning to make sense of the information and draw conclusions

• I use data analysis tools and techniques to further analyze and interpret the information

• For example, if I am trying to understand customer behavior, I would observe their actions, research their dem...read more

Yes, I have experience in coding with languages such as Python, SQL, and R.

• I have experience coding in Python for data analysis and visualization.

• I am proficient in writing SQL queries for data extraction and manipulation.

• I have used R for statistical analysis and machine learning projects.

I approach programming questions methodically by breaking them down, identifying key requirements, and testing my solutions thoroughly.

• Break down the problem into smaller subproblems

• Identify key requirements and constraints

• Choose the appropriate data structures and algorithms

• Write clean and efficient code

• Test my solutions with different test cases

Yes, I have worked on projects in core Java.

• Developed a simple inventory management system using core Java

• Implemented data structures like linked lists and arrays in Java

• Created a basic calculator application using Java Swing

Clinical trials are research studies that test how well new medical treatments work in people.

• Clinical trials are conducted to determine the safety and effectiveness of new treatments, drugs, or medical devices.

• Participants in clinical trials are closely monitored by medical professionals to assess the effects of the treatment.

• There are different phases of clinical trials, with each phase serving a specific purpose in the research process.

• Results from clinical trials help inf...read more

Pharmacodynamics is the study of how drugs interact with the body to produce their effects.

• It focuses on the mechanisms of drug action at the molecular, cellular, and tissue levels.

• Pharmacodynamics involves studying drug-receptor interactions, signal transduction pathways, and physiological responses.

• Examples include understanding how a painkiller binds to receptors in the brain to reduce pain perception, or how an antibiotic disrupts bacterial cell wall synthesis.

SQL is a programming language used to manage and manipulate relational databases.

• SQL stands for Structured Query Language

• It is used to create, modify, and query databases

• Common SQL commands include SELECT, INSERT, UPDATE, and DELETE

• SQL is used in various industries including finance, healthcare, and e-commerce