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PostgreSQL PGCES-02 Exam - Topic 9 Question 39 Discussion

Select two transaction isolation levels supported in PostgreSQL.
A) DIRTY READ and E) SERIALIZABLE
B) READ COMMITTED
C) REPEATABLE READ
D) PHANTOM READ

PostgreSQL PGCES-02 Exam - Topic 9 Question 39 Discussion

Actual exam question for PostgreSQL's PGCES-02 exam
Question #: 39
Topic #: 9
[All PGCES-02 Questions]

Select two transaction isolation levels supported in PostgreSQL.

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Suggested Answer: A, E

by Ernest at Feb 07, 2023, 08:34 AM

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Isaac
8 months ago
Surprised to see PHANTOM READ mentioned, isn't that just a concept?
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Fabiola
8 months ago
REPEATABLE READ is definitely supported as well.
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Donette
9 months ago
Wait, I thought DIRTY READ was a thing too?
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Corinne
9 months ago
Totally agree, those are the main ones!
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Diego
9 months ago
READ COMMITTED and SERIALIZABLE are two levels in PostgreSQL.
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Mayra
9 months ago
I recall REPEATABLE READ being mentioned in class, but I can't remember if it was paired with SERIALIZABLE or something else.
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Buck
9 months ago
I’m a bit confused about DIRTY READ; I thought it was a concept but not an actual isolation level in PostgreSQL.
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Malika
9 months ago
I practiced a question like this, and I believe SERIALIZABLE is definitely one of the options.
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Fatima
9 months ago
I think I remember that READ COMMITTED is one of the isolation levels, but I'm not sure about the second one.
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Gladys
9 months ago
I'm pretty confident the answer is to revert to the latest snapshot. That's the typical way to restore a VM to a previous state, so I'm going with option B.
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Delsie
9 months ago
I'm pretty sure Part I describes the TOGAF approach to Enterprise Architecture, so I'll go with option A.
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Blair
9 months ago
Okay, I think I've got a strategy for this. I'll focus on the cost and availability of the materials to determine the best option.
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Alethea
9 months ago
I think one challenge is definitely reduced visibility due to NAT. That sounds familiar from our practice discussions.
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Nana
10 months ago
Hmm, this seems like a tricky one. I'll need to think it through carefully.
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Dortha
10 months ago
I think it's the "accept" and "relay" actions, but I'm not completely sure about "accept."
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Leonida
1 year ago
B and E for the win! Though I have to say, DIRTY READ sounds like something you'd find in a cheap detective novel, not a database manual.
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Eleonora
1 year ago
I always go for SERIALIZABLE when it comes to transaction isolation levels.
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Vivan
1 year ago
Yeah, DIRTY READ does sound like it belongs in a mystery novel.
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Gearldine
1 year ago
I agree, B and E are the way to go.
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Becky
1 year ago
Alright, time to put my PostgreSQL prowess to the test. I'm confident B and E are the correct answers here. Though I do wonder if DIRTY READ is a real thing, maybe it's some kind of avant-garde isolation level that never caught on.
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Craig
1 year ago
Yes, DIRTY READ is not a valid option, stick with B and E for the correct transaction isolation levels.
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Rachael
1 year ago
DIRTY READ is not one of the supported levels, so you can confidently go with B and E.
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Catarina
1 year ago
I think you're right, B and E are indeed supported isolation levels in PostgreSQL.
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Marjory
1 year ago
Ah, the age-old PostgreSQL isolation level question. B and E are the way to go, can't go wrong with the classics. Though I have to admit, PHANTOM READ does sound like something out of a horror movie.
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Kasandra
1 year ago
I always stick with READ COMMITTED and SERIALIZABLE for my transactions.
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Paris
1 year ago
Yeah, PHANTOM READ does sound a bit spooky, but it's not as commonly used in practice.
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Clorinda
1 year ago
I agree, READ COMMITTED and SERIALIZABLE are commonly used isolation levels.
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Tashia
1 year ago
Ha! DIRTY READ, really? Sounds like something my college roommate would've tried to pull off. I'm going with B and C, those are the legit ones I remember from my PostgreSQL studies.
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Arlette
1 year ago
Hmm, B and E seem like the correct answers here. I'm pretty sure DIRTY READ is not an actual isolation level, and PHANTOM READ is just a phenomenon that can occur in certain isolation levels.
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Marge
1 year ago
Exactly, those are the two transaction isolation levels supported in PostgreSQL.
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Charlena
1 year ago
So, READ COMMITTED and SERIALIZABLE are the two correct options.
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Graciela
1 year ago
Yes, DIRTY READ is not a supported isolation level and PHANTOM READ is a phenomenon, not an isolation level.
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Dottie
1 year ago
I think you're right, B and E are the correct transaction isolation levels in PostgreSQL.
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Haley
1 year ago
So, the correct answers are B) READ COMMITTED and E) SERIALIZABLE.
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Cary
1 year ago
PHANTOM READ is indeed a phenomenon that can occur in certain isolation levels, but it's not one of the supported options.
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Angelica
1 year ago
Yeah, DIRTY READ is not a supported isolation level in PostgreSQL.
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Cordelia
1 year ago
Yeah, DIRTY READ is not an isolation level and PHANTOM READ is just a phenomenon.
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Markus
1 year ago
I think you're right, B) READ COMMITTED and E) SERIALIZABLE are the correct transaction isolation levels in PostgreSQL.
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Luisa
1 year ago
I think you're right, B and E are the correct ones.
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Gracie
1 year ago
I'm not sure about the other options, but I know that READ COMMITTED and SERIALIZABLE are commonly used in PostgreSQL for managing transactions.
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Moon
1 year ago
I agree with Shizue. READ COMMITTED and SERIALIZABLE are the correct options. They provide different levels of consistency and concurrency control.
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Shizue
1 year ago
I think the two transaction isolation levels supported in PostgreSQL are READ COMMITTED and SERIALIZABLE.
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