20+ Optimus Drugs Interview Questions and Answers

Yes, I have experience working in cloud environments.

• I have worked with AWS, Azure, and Google Cloud Platform.

• I have experience with cloud-based data storage and processing.

• I have used cloud-based tools for data visualization and analysis.

• I am familiar with cloud security and compliance measures.

OOPS stands for Object-Oriented Programming. The 4 pillars of OOPS are Inheritance, Encapsulation, Abstraction, and Polymorphism.

• OOPS stands for Object-Oriented Programming

• 4 pillars of OOPS are Inheritance, Encapsulation, Abstraction, and Polymorphism

• Polymorphism allows objects of different classes to be treated as objects of a common superclass

• Example: Sorting an array of strings in ascending order - ['apple', 'banana', 'cherry']

• Example: Sorting an array of strings in descen...read more

Yes, I have experience working in cloud environments.

• I have worked with AWS, Azure, and Google Cloud Platform.

• I have experience with cloud-based data storage and processing.

• I have used cloud-based tools for data visualization and analysis.

• I am familiar with cloud security and compliance measures.

HashMap and HashTable are both data structures used to store key-value pairs, but HashMap is not synchronized and allows null keys/values.

• HashMap is not synchronized, while HashTable is synchronized.

• HashMap allows null keys and values, while HashTable does not.

• HashMap is faster than HashTable for most operations.

• HashMap is part of the Java Collections Framework, while HashTable is a legacy class.

To change many to many relationships in PowerBI to one to many, you can create a bridge table or use DAX measures.

• Create a bridge table to connect the two tables with a one to many relationship

• Use DAX measures to aggregate data from the many to many relationship

• Normalize the data model by breaking down the many to many relationship into two one to many relationships

I prioritize tasks based on deadlines and importance, communicate with stakeholders, and adjust timelines if necessary.

• Prioritize tasks based on deadlines and importance

• Communicate with stakeholders to manage expectations

• Adjust timelines if necessary to accommodate competing priorities

Selenium is a tool used for automating web applications testing. Waits are used to synchronize tests with the application state.

• Selenium framework includes TestNG, JUnit, etc. for test execution and reporting

• Types of waits in Selenium include Implicit Wait, Explicit Wait, and Fluent Wait

• Selenium commands include findElement(), sendKeys(), click(), getText(), etc.

OLAP is used for analyzing historical data while OLTP is used for managing real-time transactional data.

• OLAP stands for Online Analytical Processing and is used for data analysis and reporting.

• OLTP stands for Online Transactional Processing and is used for managing real-time transactional data.

• OLAP databases are optimized for read-heavy workloads and complex queries.

• OLTP databases are optimized for write-heavy workloads and simple queries.

• Examples of OLAP tools include Micros...read more

Time shift timings refer to the difference in time between two events or data points.

• Time shift timings are used to analyze trends and patterns over time.

• They can be calculated by subtracting the time of one event or data point from another.

• For example, the time shift between two stock market closing prices can be used to analyze market trends.

• Time shift timings can also be used in forecasting and predictive modeling.

• They are important in fields such as finance, economics, an...read more

Active Directory is a directory service developed by Microsoft for Windows domain networks.

• Centralized database for managing network resources

• Stores information about users, computers, and other network objects

• Allows administrators to control access and permissions

• Facilitates single sign-on for users across different applications

• Supports group policies for managing security settings

SQL query using window function

• Use the OVER() clause to define the window frame

• Common window functions include ROW_NUMBER(), RANK(), DENSE_RANK(), and NTILE()

• Example: SELECT column1, column2, ROW_NUMBER() OVER(ORDER BY column1) AS row_num FROM table_name

Key Performance Indicators (KPIs) are measurable values that demonstrate how effectively a company is achieving key business objectives.

• KPIs should be specific, measurable, achievable, relevant, and time-bound (SMART)

• Examples of KPIs include revenue growth rate, customer acquisition cost, customer retention rate, and conversion rate

• KPIs vary depending on the industry and business goals

Querying in pandas involves using functions like .loc, .iloc, and .query to filter and manipulate data.

• Use .loc to select rows and columns by labels

• Use .iloc to select rows and columns by index positions

• Use .query to filter rows based on a boolean expression

A composite key is a combination of two or more columns in a database table that uniquely identifies each row.

• Composite keys are used when a single column cannot uniquely identify a row.

• They are created by combining multiple columns together.

• Example: a table tracking student enrollments may use a composite key of student ID and course ID.

A circular loop is a closed path in which the end points are connected to form a circle.

• A circular loop can be found in electrical circuits where current flows continuously in a closed path.

• Circular loops are commonly used in magnetic fields to demonstrate the concept of magnetic flux.

• Circular loops can also refer to physical objects like a hula hoop or a circular roller coaster track.

The project utilized a variety of technologies including Python, SQL, Tableau, and Excel.

• Python

• SQL

• Tableau

• Excel

Covariance measures the relationship between two variables, indicating whether they vary together or in opposite directions.

• Covariance can be positive, negative, or zero.

• A positive covariance indicates that as one variable increases, the other variable also tends to increase.

• A negative covariance indicates that as one variable increases, the other variable tends to decrease.

• A covariance of zero indicates that there is no linear relationship between the variables.

My motivation stems from a passion for uncovering insights from data and making a positive impact through data-driven decisions.

• Passion for uncovering insights from data

• Desire to make a positive impact through data-driven decisions

• Enjoyment of problem-solving and analytical challenges

Testing is the process of evaluating a system or component to determine if it meets specified requirements.

• Testing involves executing a system or component with the intent of finding defects.

• Types of testing include unit testing, integration testing, system testing, and acceptance testing.

• Testing helps ensure that the software or system functions correctly and meets user expectations.

• Examples of testing tools include Selenium for automated web testing and JUnit for Java unit ...read more

Type 1 error occurs when a true null hypothesis is incorrectly rejected.

• Occurs when the null hypothesis is true but is rejected

• Also known as a false positive

• Denoted by alpha (α) in hypothesis testing

• Example: Concluding a new drug is effective when it actually isn't

ETL process involves extracting data from various sources, transforming it to fit business needs, and loading it into a target database.

• Extract data from multiple sources such as databases, files, APIs, etc.

• Transform the data by cleaning, filtering, aggregating, and structuring it.

• Load the transformed data into a target database or data warehouse.

• ETL tools like Informatica, Talend, and SSIS are commonly used for this process.