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PostgreSQL PGCES-02 Exam - Topic 1 Question 78 Discussion

Actual exam question for PostgreSQL's PGCES-02 exam
Question #: 78
Topic #: 1
[All PGCES-02 Questions]

A sequence has the following definition: CREATE SEQUENCE seq1 CACHE 10 CYCLE; Select the value that is returned by executing the following SQL. SELECT nextval('seq1');

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Suggested Answer: A, C

by Jacquelyne at Dec 07, 2024, 01:56 PM

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Colette
6 months ago
CYCLE means it goes back to the start, so B is right.
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Callie
6 months ago
I thought it would return 0, but I guess not!
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Hildred
6 months ago
Wait, does it really cycle back to 1 after reaching 10?
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Leonora
7 months ago
Definitely going with option B, that's the first value.
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Brynn
7 months ago
The sequence starts at 1 by default.
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Stephaine
7 months ago
I’m a bit confused about the CACHE option. Does it affect the first value? I might lean towards C, but I’m not certain.
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Tiera
7 months ago
I practiced a similar question, and I believe the first value returned is always 1. So, I would go with B.
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Therese
7 months ago
I'm not entirely sure, but I remember something about sequences cycling back to the start. Could it be D?
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Mammie
8 months ago
I think the sequence starts at 1, so maybe the answer is B.
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Laticia
8 months ago
I've got this one! The CYCLE option means the sequence will reset to 1 after reaching the maximum value, so the correct answer is C - 10.
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Cecil
8 months ago
I'm a little confused by the CYCLE option. Does that mean the sequence will just keep going indefinitely, or will it reset to 1 after reaching some maximum value? I'll have to double-check the documentation on that.
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Zona
8 months ago
Okay, let me break this down step-by-step. The sequence is defined to cache 10 values, and it's set to cycle. So the first 10 calls to nextval() should return 1 through 10, and then it should start over at 1.
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Jesus
8 months ago
Hmm, I'm a bit unsure about how the CACHE and CYCLE options work in this context. I'll need to think it through carefully.
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Tamar
8 months ago
This looks like a straightforward sequence question. I think I can handle this one.
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Lajuana
1 year ago
This question is a real sequence-buster! I'm tempted to say E) -10, just to see the look on the examiner's face.
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Ciara
1 year ago
I'm going to go with A) 0. Why not? Sequences can be a bit unpredictable sometimes, so 0 seems like a good answer to throw off the competition.
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Elly
1 year ago
Hmm, this is tricky. I'm leaning towards C) 10, because the CACHE 10 parameter means the sequence will pre-allocate 10 values at a time.
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Nickolas
11 months ago
I'm not sure, but I'll go with A) 0 as my guess.
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Eric
11 months ago
I agree with C) 10, the CACHE parameter does pre-allocate values.
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Anissa
12 months ago
I believe it's D) 11, since the sequence will cycle back to the beginning after reaching the maximum value.
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Nydia
12 months ago
I think it's B) 1, because the sequence starts at 1 by default.
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Crissy
1 year ago
My guess is D) 11. Since the sequence is set to CYCLE, it will start over from the beginning once it reaches the maximum value, so the next call should return 11.
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Annette
11 months ago
I agree with D) 11. The sequence will cycle back to the beginning after reaching the maximum value.
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Claudio
11 months ago
I believe it's C) 10. Since the cache is set to 10, it will return the next value in the cache.
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Brittani
12 months ago
I think it's B) 1. The sequence starts at 0 and increments by 1 each time.
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Lacresha
1 year ago
I think the correct answer is B) 1. The CACHE 10 parameter means that the sequence will pre-allocate 10 values, so the first call to nextval() should return 1.
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Daren
1 year ago
I think it might be D) 11 because of the CYCLE option.
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Daren
1 year ago
I agree, the correct answer is B) 1.
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Julene
1 year ago
Hmm, that makes sense too. I guess we'll have to wait and see what the correct answer is.
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Jeanice
1 year ago
I disagree, I believe the answer is B) 1 because the sequence starts at 0 and the first value returned is 1.
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Julene
1 year ago
I think the answer is A) 0 because the sequence starts at 0 and cycles after reaching the maximum value.
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