Delta Information Systems, Inc. is a leading provider of next-generation, intelligent information systems. Specializing in comprehensive data solutions, Delta Information Systems helps businesses transform data into actionable insights. With an unwavering commitment to innovation, the company serves a diverse clientele across various industries, focusing on maximizing the value of their data assets.

Joining Delta Information Systems as a Business Intelligence (BI) Analyst means diving into the heart of data-driven decision-making. As a BI Analyst, you will be responsible for developing, implementing, and maintaining business intelligence solutions to help drive strategic business decisions. This position requires a strong foundation in data analytics, visualization tools, SQL, and an understanding of business processes.

If you're preparing for your interview at Delta Information Systems, this guide from Interview Query will provide you with valuable insights, including the company's interview process, commonly asked questions, and helpful tips. Let's get started!

Submitting Your Application

The first step is to submit a compelling application that reflects your technical skills and interest in joining Delta Information Systems, Inc. as a Business Intelligence professional. Whether you were contacted by a Delta Information Systems recruiter or have taken the initiative yourself, carefully review the job description and tailor your CV according to the prerequisites.

Tailoring your CV may include identifying specific keywords that the hiring manager might use to filter resumes and crafting a targeted cover letter. Furthermore, don’t forget to highlight relevant skills and mention your work experiences.

Recruiter/Hiring Manager Call Screening

If your CV happens to be among the shortlisted few, a recruiter from the Delta Information Systems Talent Acquisition Team will make contact and verify key details like your experiences and skill level. Behavioral questions may also be a part of the screening process.

In some cases, the Delta Information Systems Business Intelligence hiring manager stays present during the screening round to answer your queries about the role and the company itself. They may also indulge in surface-level technical and behavioral discussions.

The whole recruiter call should take about 30 minutes.

Technical Virtual Interview

Successfully navigating the recruiter round will present you with an invitation for the technical screening round. Technical screening for the Delta Information Systems Business Intelligence role usually is conducted through virtual means, including video conference and screen sharing. Questions in this 1-hour-long interview stage may revolve around data systems, ETL pipelines, and SQL queries.

In the case of Business Intelligence roles, take-home assignments regarding data warehousing, analytics, and data visualization are incorporated. Apart from these, your proficiency against hypothesis testing, probability distributions, and business analysis fundamentals may also be assessed during the round.

Depending on the seniority of the position, case studies and similar real-scenario problems may also be assigned.

Onsite Interview Rounds

Followed by a second recruiter call outlining the next stage, you’ll be invited to attend the onsite interview loop. Multiple interview rounds, varying with the role, will be conducted during your day at the Delta Information Systems office. Your technical prowess, including data modeling and data visualization capabilities, will be evaluated against the finalized candidates throughout these interviews.

If you were assigned take-home exercises, a presentation round may also await you during the onsite interview for the Business Intelligence role at Delta Information Systems.

Quick Tips For Delta Information Systems Business Intelligence Interviews

• Know Your Data Systems: Questions are standardized and rely heavily on understanding ETL processes, SQL, and data warehousing concepts. Be sure to brush up on these areas.
• Be Business-Minded: Delta Information Systems assesses how well you can provide business-driving insights with data. Brush up on your business analysis and problem-solving skills.
• Showcase Your Tools Proficiency: Skills in BI tools like Tableau, Power BI, or Looker are often crucial. Be prepared to discuss and demonstrate your proficiency in these platforms.

Interview Query

Typically, interviews at Delta Information Systems, Inc. vary by role and team, but commonly Business Intelligence interviews follow a fairly standardized process across these question topics.

• Write a SQL query to select the 2nd highest salary in the engineering department. Write a SQL query to select the 2nd highest salary in the engineering department. If more than one person shares the highest salary, the query should select the next highest salary.

• Write a function to find the maximum number in a list of integers. Given a list of integers, write a function that returns the maximum number in the list. If the list is empty, return None.

• Create a function convert_to_bst to convert a sorted list into a balanced binary tree. Given a sorted list, create a function convert_to_bst that converts the list into a balanced binary tree. The output binary tree should be balanced, meaning the height difference between the left and right subtree of all the nodes should be at most one.

• Write a function to simulate drawing balls from a jar. Write a function to simulate drawing balls from a jar. The colors of the balls are stored in a list named jar, with corresponding counts of the balls stored in the same index in a list called n_balls.

• Develop a function can_shift to determine if one string can be shifted to become another. Given two strings A and B, write a function can_shift to return whether or not A can be shifted some number of places to get B.

• What are the drawbacks of having student test scores organized in the given layouts? Assume you have data on student test scores in two different layouts. Identify the drawbacks of these layouts and suggest formatting changes to make the data more useful for analysis. Additionally, describe common problems seen in "messy" datasets.

• How would you locate a mouse in a 4x4 grid using the fewest scans? You have a 4x4 grid with a mouse trapped in one of the cells. You can scan subsets of cells to know if the mouse is within that subset. Describe a strategy to find the mouse using the fewest number of scans.

• How would you select Dashers for Doordash deliveries in NYC and Charlotte? Doordash is launching delivery services in New York City and Charlotte. Describe the process for selecting Dashers (delivery drivers) and discuss whether the criteria for selection should be the same for both cities.

• What factors could bias Jetco's study on boarding times? Jetco, a new airline, has the fastest average boarding times according to a study. Identify potential factors that could have biased this result and explain what you would investigate further.

• How would you design an A/B test to evaluate a pricing increase for a B2B SAAS company? A B2B SAAS company wants to test different subscription pricing levels. Design a two-week-long A/B test to evaluate a pricing increase and determine whether it is a good business decision.

• How much should a ride-sharing app budget for a $5 coupon initiative? A ride-sharing app has a probability (p) of dispensing a $5 coupon to a rider and services (N) riders. Calculate the total budget needed for the coupon initiative.

• What is the probability of riders getting a coupon? A driver using the app picks up two passengers. Determine:

• The probability of both riders getting the coupon.

• The probability that only one of them will get the coupon.

• What is a confidence interval for a statistic and why is it useful? Explain what a confidence interval is, why it is useful to know the confidence interval for a statistic, and how to calculate it.

• What is the probability of finding an item on Amazon's website? Amazon has a warehouse system where items are located at different distribution centers. In a city, the probability that item X is available at warehouse A is 0.6 and at warehouse B is 0.8. Given that items are only found on the website if they exist in the distribution centers, calculate the probability that item X would be found on Amazon's website.

• Is a coin fair if it comes up tails 8 times out of 10 flips? You flip a coin 10 times, and it comes up tails 8 times and heads twice. Determine if this is a fair coin.

• What are time series models and why are they needed? Describe what time series models are and explain why they are needed when less complicated regression models are available.

• How would you justify the complexity of building a neural network model and explain predictions to non-technical stakeholders? Your manager asks you to build a neural network model to solve a business problem. How would you justify the complexity of the model and explain its predictions to non-technical stakeholders?

• How would you evaluate the suitability and performance of a decision tree model for predicting loan repayment? You are tasked with building a decision tree model to predict if a borrower will repay a personal loan. How would you evaluate whether a decision tree is the correct model, and how would you assess its performance before and after deployment?

• How does random forest generate the forest, and why use it over logistic regression? Explain the process by which random forest generates its forest. Additionally, discuss why one might choose random forest over logistic regression for certain problems.

• How would you explain linear regression to a child, a first-year college student, and a seasoned mathematician? Explain the concept of linear regression to three different audiences: a child, a first-year college student, and a seasoned mathematician. Ensure each explanation is appropriate for their understanding level.

• What are the key differences between classification models and regression models? Describe the main differences between classification models and regression models.

What is the average salary for a Business Intelligence at Delta Information Systems, Inc.?

Q: What is the interview process at Delta Information Systems, Inc. like?

A: The interview process at Delta Information Systems, Inc. typically involves multiple stages: an initial phone screen with HR, a technical interview focusing on your Business Intelligence skills, and an onsite interview to assess your problem-solving abilities and cultural fit with the company.

Q: What are some common technical skills required for the Business Intelligence position?

A: Key skills for the Business Intelligence role include experience with data warehousing, SQL proficiency, data visualization tools like Tableau or Power BI, and strong analytical capabilities. Familiarity with ETL processes and reporting is also valuable.

Q: How would you describe the company culture at Delta Information Systems, Inc.?

A: Delta Information Systems, Inc. prides itself on a collaborative and innovative culture. The company values continuous learning, teamwork, and the willingness to take calculated risks to drive business success.

Q: What makes working at Delta Information Systems, Inc. unique?

A: Working at Delta Information Systems, Inc. offers the opportunity to be part of a dynamic and forward-thinking team. The company emphasizes professional growth, hands-on learning, and the chance to work on impactful projects that drive business intelligence forward.

Q: How can I prepare for an interview at Delta Information Systems, Inc.?

A: To prepare for your interview, research the company's history and recent projects, practice common interview questions via Interview Query, and brush up on your technical skills. Be ready to discuss your past experiences and how they align with the Business Intelligence role at Delta Information Systems, Inc.

If you want more insights about the company, check out our main Delta Information Systems Interview Guide, where we have covered many interview questions that could be asked. We’ve also created interview guides for other roles, such as software engineer and data analyst, where you can learn more about Delta Information Systems’ interview process for different positions.

At Interview Query, we empower you to unlock your interview prowess with a comprehensive toolkit, equipping you with the knowledge, confidence, and strategic guidance to conquer every Delta Information Systems interview question and challenge.

You can check out all our company interview guides for better preparation, and if you have any questions, don’t hesitate to reach out to us.

Good luck with your interview!