How does a data array differ from a stack?
This is another technical question the interviewer uses to determine your qualifications for this position. Throughout the interview, you will be asked many different technical, operational, and practical questions. The purpose of these is to make sure you can perform the tasks required by the job and have experience in the areas needed for this role.
"The difference between a data array and a stack is that the array doesn't have a predetermined procedure for how to add or retrieve data. On the other hand, a stack has a strict 'last in and first out' or LIFO approach. The data array provides more flexibility but requires more storage space. The stack may be more appropriate when managing financial or product inventory data."
Knowing the difference between a data array and a stack demonstrates your qualifications as a senior software engineer. More importantly, your ability to communicate this in simple, non-technical language will show the interviewer that you can collaborate with other stakeholders within the organization who may not have the same technical expertise as you or the other software development team members. Don't fall into the trap of trying to impress the interviewer using highly technical language, acronyms, or jargon they may not understand. This often puts the interviewer off and will make them more prone to choose somebody who communicates more clearly.
Community answers are written by other candidates practicing this set. Reading how others frame the same question is one of the fastest ways to sharpen your own.
Anonymous Answer
A data array is specifically for organized or unorganized data with no restrictions on how to add or retrieve the data from the array. It's far more versatile than a stack, however, a stack does have specific restrictions on how things are added and retrieved from the stack by enforcing a LIFO retrieval process. A stack has rather niche uses and could be used for specific processes where LIFO order is crucial such as inventory systems that handle product sales when the cost is rising. In that case, it may be beneficial for the company and accounting to use a stack and abide by LIFO to sell the higher priced item first.
Amanda's Feedback
Good job! You've explained how a data array differs from a stack. You've also shared that a stack is beneficial in a sales scenario. You can further enhance this answer by providing an example of how/when a data array is the best option for use. This helps show the interviewer that you can appropriately match technology needs with business needs.
