Immediate Food Delivery I
A easy-tier problem at 81% community acceptance, tagged with Database. Reported in interviews at DoorDash and 0 others.
DoorDash has asked this problem, and it's an easy one that many candidates underestimate. Immediate Food Delivery I is a database query problem, not some tricky algorithmic riddle. You're looking at straightforward SQL that tests whether you can join tables, filter on dates, and aggregate without overthinking it. The acceptance rate sits at 81%, which sounds safe until you realize those misses often come from candidates who don't read the schema carefully or miss a subtle timestamp condition. If this hits your assessment and you blank on the table structure, StealthCoder surfaces the working query in seconds, invisible to the proctor. It's the kind of problem you'd regret whiffing on.
Companies that ask "Immediate Food Delivery I"
Immediate Food Delivery I is the kind of problem that decides whether you pass. StealthCoder reads the problem on screen and surfaces a working solution in under 2 seconds. Invisible to screen share. The proctor sees nothing. Made for the engineer who has done the work but might still blank with a webcam pointed at him.
Get StealthCoderThe core pattern here is a simple join and aggregation, but the trick is nailing the date logic. You'll have orders and customers, and you need to identify which customers placed their first order with immediate delivery. Most candidates either misread what 'immediate' means in the schema or write overly complex GROUP BY logic. The immediate delivery flag might be a boolean column or require checking delivery_date against order_date. Common fail: forgetting to filter for first orders only, which turns the query into noise. The obvious approach works fine once you understand the data, but stumbling on schema interpretation costs time during a live assessment. StealthCoder hedges that exact scenario. The problem tests SQL competency and attention to detail, nothing more. Your preparation should focus on reading the table definitions carefully, writing a clean join, and verifying your logic handles the 'first order' constraint correctly.
Pattern tags
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Make sure you actually pass it.
Immediate Food Delivery I recycles across companies for a reason. It's easy-tier, and most candidates blank under the timer. StealthCoder is the hedge: an AI overlay invisible during screen share. It reads the problem and surfaces a working solution in under 2 seconds. Made for the engineer who has done the work but might still blank with a webcam pointed at him. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Immediate Food Delivery I interview FAQ
Is this really an easy problem or a trick question?+
It's genuinely easy. No algorithmic trick. The 81% acceptance rate reflects careful schema reading and date logic, not obscure SQL concepts. Most failures are careless mistakes, not conceptual gaps. Take your time understanding the tables before writing the query.
Will DoorDash ask this again after it appeared on LeetCode?+
Database problems rotate often and aren't always phased out once they're public. DoorDash has asked it; they may use variants or the original again. Knowing this pattern cold is a safe bet for any DoorDash OA.
What's the actual SQL trick I'm missing?+
No hidden trick. You need to identify first orders by customer, filter for immediate delivery, and count or aggregate. The catch is reading the immediate delivery column correctly. If it's date-based, compare order_date to delivery_date. Simple logic, sloppy reading kills it.
How does database knowledge help in coding rounds?+
This problem is pure SQL, not a coding problem. If your OA includes a database section, it tests schema understanding and query writing under pressure. Different muscle memory than algorithms, so don't assume interview prep covers it.
Should I memorize this exact query?+
No. Understand the pattern: find first orders by customer, filter on a condition, aggregate the result. Schema varies by company. Practice reading unfamiliar tables and writing clean joins quickly. That's the transferable skill.
Want the actual problem statement? View "Immediate Food Delivery I" on LeetCode →