Huawei H13-723_V2.0 Exam - Topic 6 Question 69 Discussion

Actual exam question for Huawei's H13-723_V2.0 exam

Question #: 69
Topic #: 6

existSpark, assuminglinesIs anDStreamObject, which of the following statements can periodically count the number of words on this stream?

Alines.flatMap(_.split??)).map(word=>(word,1)).reduce(_+_).print ( )

Blines.flatMap(_.split??)).map(word=>(word,word.length())).reduceByKey(_+_).print ( )

Clines.flatMap(_.split??)).map(word=>(word,1)).reduceByKey(_+_).print ( )

Dlines.flatMap(_.split??)).flatmap(word=>(word,1)).groupByKey(_+_).print ( )

Show Suggested Answer

Suggested Answer: C

by Aleta at Nov 24, 2025, 10:53 PM

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Keva

1 day ago

A seems too simple.

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Irving

6 days ago

I prefer option A.

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Holley

11 days ago

It counts words correctly with reduceByKey.

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Krissy

17 days ago

Why C?

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Holley

22 days ago

I think option C is the best.

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Chandra

27 days ago

B) seems like it would just count characters, not words.

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Mel

2 months ago

Wait, can you really use reduceByKey with a tuple like that?

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Remona

2 months ago

D) looks off, can't group by key like that.

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Alyce

2 months ago

I think C) works too, right?

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Huey

2 months ago

Haha, the `_.split??` part is a typo, right? Gotta love these exam questions that are full of bugs.

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Felicidad

2 months ago

Hmm, I'm going to go with option D. Seems like the most straightforward way to count the words.

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Belen

2 months ago

I'm pretty sure the answer is C, but I'm still confused about the `_.split??` part. What's that all about?

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Marsha

3 months ago

Option B is also a valid solution, as it counts the length of each word instead of just the number of occurrences.

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Paulina

3 months ago

Option D seems off to me too; I don't recall using groupByKey for counting like this. It feels like it would be inefficient.

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Brett

3 months ago

I remember practicing a similar question, and I think option B is counting word lengths instead of just counting words, so it can't be right.

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Teddy

3 months ago

I'm not entirely sure, but I feel like option A might be wrong since it uses reduce instead of reduceByKey.

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Georgene

3 months ago

I think option C looks familiar because it uses reduceByKey, which is often used for counting in Spark.

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Jacqueline

3 months ago

This is straightforward. I'd go with option C - it looks like the most direct way to count the words on the stream.

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Vicky

4 months ago

A) is the correct one for counting words!

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Berry

4 months ago

I've seen similar questions before. I think option C is the way to go, but I'll verify the details.

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Tegan

4 months ago

Option C is the correct answer. It uses the `reduceByKey` function to count the number of occurrences of each word.

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Dyan

4 months ago

I'm a bit confused by the question. Can we go over the concepts again before the exam?

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Yolande

4 months ago

Option A? Really? That's just printing the stream, not counting the words. Whoever wrote this question needs to go back to Spark 101.

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Nina

5 months ago

Okay, let's see. I think I know the basic approach, but I'll need to double-check the syntax.

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Anthony

5 months ago

Hmm, this looks like a tricky one. I'll need to think through the options carefully.

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