In a Tumbling Window with window-size 5 minutes and advance-interval 5 minutes, which window sequence is produced?

In a Tumbling Window with window-size 5 minutes and advance-interval 5 minutes, which window sequence is produced?

• A. [0-5min] [5-10min] [10-15min]
• B. [0-4min] [5-9min] [10-14min]
• C. [1-6min] [6-11min] [11-16min]
• D. [0-5min] [5-9min] [10-15min]

Answer: (A)

The windowing idea being tested is that tumbling windows are fixed-size, non-overlapping intervals. When both the window size and the advance interval are 5 minutes, you get consecutive, back-to-back windows that start at 0, then 5, then 10 minutes, and so on. So the produced sequence covers the timeline in 5-minute blocks: [0-5min], [5-10min], [10-15min]. This is why that option is the right one. The other sequences would imply different widths or an offset start, which isn’t what a 5-minute tumbling window with a 5-minute advance yields.

The windowing idea being tested is that tumbling windows are fixed-size, non-overlapping intervals. When both the window size and the advance interval are 5 minutes, you get consecutive, back-to-back windows that start at 0, then 5, then 10 minutes, and so on. So the produced sequence covers the timeline in 5-minute blocks: [0-5min], [5-10min], [10-15min]. This is why that option is the right one. The other sequences would imply different widths or an offset start, which isn’t what a 5-minute tumbling window with a 5-minute advance yields.