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PostgreSQL PGCES-02 Exam - Topic 5 Question 6 Discussion

psql generated the following error message: psql: could not connect to server: Connection was refused Is the server running on host "server.example.com" and accepting TCP/IP connections on port 5432? Select two reasons that are NOT the cause of this error.
A) Host 'server.example.com' does not exist. and E) The username and/or password are incorrect.
B) The PostgreSQL server is not running on 'server.example.com'.
C) The PostgreSQL server is not accepting TCP/IP connections on 'server.example.com'.
D) The PostgreSQL server is running on a port other than 5432 on 'server.example.com'.

PostgreSQL PGCES-02 Exam - Topic 5 Question 6 Discussion

Actual exam question for PostgreSQL's PGCES-02 exam
Question #: 6
Topic #: 5
[All PGCES-02 Questions]

psql generated the following error message: psql: could not connect to server: Connection was refused Is the server running on host "server.example.com" and accepting TCP/IP connections on port 5432? Select two reasons that are NOT the cause of this error.

Show Suggested Answer Hide Answer
Suggested Answer: A, E

by Stephane at May 05, 2022, 06:39 PM

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Eileen
8 months ago
I thought incorrect credentials could cause this too, but maybe not?
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Oren
8 months ago
C is definitely a reason, but E is unrelated.
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Walton
9 months ago
Wait, could it actually be D? That’s a possibility!
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Gaston
9 months ago
I agree, B is also not the cause here.
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Glendora
9 months ago
Definitely not A, that host exists.
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Sabrina
9 months ago
I’m a bit confused, but I think option A about the host not existing could be a valid reason for the error, so maybe it’s not one of the answers we need.
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Selma
9 months ago
I feel like we had a practice question about server ports, so option D could be a reason that doesn't cause the error.
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Carman
9 months ago
I'm not entirely sure, but I think option E about username and password might not be related to the connection refusal error.
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Mirta
9 months ago
I remember we discussed that if the server isn't running, it would definitely cause a connection issue, so I think option B is likely a cause.
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Marnie
9 months ago
Okay, let me think this through. The question says the GVP deployment requires TTS using MRCP, so I need to make sure the MRCP settings are correct. I'll go with option A and update the MRCP URL.
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Erasmo
10 months ago
Okay, I've got this. PIM is focused on efficient multicast routing, so the answer has to be about something like preventing forwarding loops or ensuring delivery. I'm confident I can get this right.
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Tommy
10 months ago
I think Application Centric Infrastructure is definitely involved since it optimizes deployment. It feels similar to practice questions we've done.
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