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Hitachi Vantara HCE-5920 Exam - Topic 4 Question 56 Discussion

In a PDI transformation you are retrieving data from a large lookup table using a Database Lookup step from improve performance, you enable caching in the step and use the Load all data from table option.In this scenario, which three statement s are correct about the data flow of the 'Database Lookup step? (Choose three.)
A) When caching is enable, only rows with matching lookup values will passed through. and B) There must be enough allocated heap space to store the lookup fields allocated heap space to store the lookup fields in memory. and C) Cached comparisons are case sensitive.
D) Every input row must have only one matching row in the lookup table
E) Only one matching row is used from the Lookup table.

Hitachi Vantara HCE-5920 Exam - Topic 4 Question 56 Discussion

Actual exam question for Hitachi Vantara's HCE-5920 exam
Question #: 56
Topic #: 4
[All HCE-5920 Questions]

In a PDI transformation you are retrieving data from a large lookup table using a Database Lookup step from improve performance, you enable caching in the step and use the Load all data from table option.

In this scenario, which three statement s are correct about the data flow of the 'Database Lookup step? (Choose three.)

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Suggested Answer: A, B, C

by Lettie at Sep 18, 2024, 11:05 AM

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My
7 months ago
B is crucial, without enough heap space it won't work!
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Dorian
8 months ago
E seems off, you can have multiple matches but only one is used.
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Crissy
8 months ago
Wait, are cached comparisons really case sensitive?
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Andree
8 months ago
I disagree with D, multiple matches can happen.
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Frank
8 months ago
A and B are definitely correct!
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Giovanna
9 months ago
I feel like option D is tricky; I thought every input row could have multiple matches, but maybe that's not the case here.
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Maurine
9 months ago
I practiced a similar question where case sensitivity was mentioned, but I can't recall if it's true for cached comparisons.
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Jeffrey
9 months ago
I think option B is definitely correct because if there's not enough heap space, the lookup won't work properly.
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Cary
9 months ago
I remember something about caching, but I'm not sure if it only passes matching rows or if it can pass others too.
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Iluminada
9 months ago
I'm feeling pretty confident about this one. The caching and lookup behavior is something I've worked with before, so I should be able to identify the correct statements.
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Marsha
9 months ago
Okay, I think I've got a handle on this. The key is understanding how caching works in the Database Lookup step and the implications for performance and data flow.
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Hillary
9 months ago
Hmm, I'm a bit confused about the "Load all data from table" option. Does that mean the entire lookup table is loaded into memory? I'll need to double-check that.
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Kayleigh
9 months ago
This looks like a tricky question about database lookup caching. I'll need to carefully read through the options and think through the data flow.
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Lizbeth
9 months ago
This is a good opportunity to demonstrate my understanding of PDI data flow and lookup performance optimization. I'll make sure to read each option carefully.
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Latosha
9 months ago
Psychometric testing feels more like an HR function, and I'm pretty certain that deciding strategic objectives falls outside an operational line manager's duties.
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Magdalene
2 years ago
I believe statement D is correct, each input row should have only one matching row in the lookup table.
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Helene
2 years ago
I agree with statement B, we need enough memory to store lookup fields.
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Deja
2 years ago
I think statement A is correct because only matching rows are passed through.
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Margot
2 years ago
Hah, this question's got me scratching my head. I'll go with B, D, and E. Hopefully, I don't end up in the 'lookup table of shame'!
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Millie
2 years ago
Ah, the joys of database lookups! I'm feeling confident with A, B, and D. Can't forget the importance of that single match!
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Stefany
2 years ago
Hmm, let's see... I'd go with B, C, and E. The case sensitivity thing is a real gotcha, you know?
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Francoise
2 years ago
E) Only one matching row is used from the Lookup table.
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Leeann
2 years ago
C) Cached comparisons are case sensitive.
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Omer
2 years ago
B) There must be enough allocated heap space to store the lookup fields allocated heap space to store the lookup fields in memory.
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Della
2 years ago
Woah, this one's a toughie! But I think A, B, and E are the correct answers. Gotta love that caching, am I right?
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Lajuana
2 years ago
Yes, that's correct. Caching can make a big difference in data retrieval speed.
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Lili
2 years ago
I think you're right, A, B, and E are correct. Caching really helps with performance.
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