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Which of the following Kafka Streams operators are stateful? (select all that apply)
Suggested Answer: B, C, D, F
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Seehttps://kafka.apache.org/20/documentation/streams/developer-guide/dsl-api.html#stateful-transformations
22 comments · newest first
TE
Temeka
2 days ago
Yeah, and C) joining too.
IR
Irma
7 days ago
I think B) reduce is stateful.
CE
Cecily
12 days ago
I agree, E) peek is stateless as well.
ES
Esteban
17 days ago
A) flatmap seems stateless to me.
WI
Willis
23 days ago
I feel like D) count is also stateful.
WA
Walker
28 days ago
What about F) aggregate? That's definitely stateful.
YO
Youlanda
1 month ago
Yeah, and C) joining too.
LO
Louann
1 month ago
I think B) reduce is stateful.
NA
Nancey
1 month ago
Count is stateful? I didn't know that!
DE
Delbert
2 months ago
Wait, are you sure about joining? Seems a bit sketchy.
JE
Jerry
2 months ago
Totally agree, reduce and aggregate are definitely stateful.
CA
Catrice
2 months ago
I thought peek was stateful too?
GE
Gearldine
2 months ago
B, C, D, and F are stateful.
KA
Kayleigh
2 months ago
I’m surprised peek isn’t stateful!
LE
Leslee
2 months ago
Count is stateful? Really?
LA
Lashunda
3 months ago
Definitely agree with B and F!
RE
Reta
3 months ago
I thought flatmap was stateful too?
LA
Latosha
3 months ago
B, C, D, F are stateful.
DO
Dominga
3 months ago
Joining seems tricky; I think it might be stateful too, but I can't recall all the details.
KA
Kaycee
3 months ago
I practiced a question similar to this, and I feel like flatmap and peek are stateless, but I could be wrong.
LA
Lachelle
4 months ago
I think count is also stateful since it keeps track of the number of records, right?
EV
Evelynn
5 months ago
I remember that reduce and aggregate are definitely stateful, but I'm not sure about joining.