Demandbase Interview Questions and Answers

Move all zeros in an array of strings to the end.

• Iterate through the array and move all zeros to the end by swapping with non-zero elements.

• Maintain a pointer to keep track of the position to swap with zeros.

• Example: Input: ['a', 'b', 'c', '0', 'd', '0'], Output: ['a', 'b', 'c', 'd', '0', '0']

To find the minimum element in a stack in O(1) complexity, we can use an auxiliary stack.

• Create an auxiliary stack to keep track of the minimum element.

• Push the first element of the main stack onto the auxiliary stack.

• For each subsequent element, compare it with the top element of the auxiliary stack.

• If it is smaller, push it onto the auxiliary stack.

• To get the minimum element, simply return the top element of the auxiliary stack.

• When popping elements from the main stack, als...read more

I have 3 years of experience working with Scala in developing backend applications.

• Developed RESTful APIs using Scala Play framework

• Utilized Akka for building highly concurrent and distributed systems

• Worked on data processing tasks using Apache Spark with Scala

Airflow is an open-source platform to programmatically author, schedule, and monitor workflows.

• Airflow is used for orchestrating complex workflows in data pipelines.

• It allows users to define workflows as Directed Acyclic Graphs (DAGs).

• Airflow provides a web-based UI for monitoring and managing workflows.

• It supports various integrations with different systems and tools.

• Example: Using Airflow to schedule ETL jobs for data processing.

Extensive experience with Java programming language

• Proficient in Java programming for over 5 years

• Developed multiple applications using Java, including web applications and desktop applications

• Strong understanding of object-oriented programming concepts in Java

• Experience with Java frameworks such as Spring and Hibernate

• Familiar with Java development tools like Eclipse and IntelliJ IDEA

Look for C-level details in company annual reports, press releases, investor presentations, and industry publications.

• Company annual reports

• Press releases

• Investor presentations

• Industry publications

Public companies are traded on stock exchanges and have more regulatory requirements, while private companies are not traded publicly and have more flexibility.

• Public companies have more regulatory requirements due to SEC regulations

• Private companies have more flexibility in decision-making and operations

• Public companies have more transparency as they are required to disclose financial information to the public

• Private companies have more privacy as they are not required to di...read more

Data analytics using excel involves analyzing and interpreting data using various tools and functions in Excel.

• Use functions like VLOOKUP, SUMIF, and PivotTables to analyze data

• Create charts and graphs to visualize data trends

• Use conditional formatting to highlight important data points

• Perform statistical analysis using Excel's data analysis toolpack

• Clean and organize data using filters and sorting functions