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Question
what are Lookup caches options? Including persistent caches.
 Question Submitted By :: ETL
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
There are two types of Lookup Cache options -

1. Dynamic cache.
2. Persistent cache

1. dynamic Cache - The Dynamic cache is a property of the
look up which if selected makes other ports of the same
record to be checked as Look up apart from the Look up port.

2. Persistent Cache - persistent cache is something like on
the first run the lookup table values gets into a cache and
is stored on the server's hard disk. Each time the run is
made the values would be looked up from this cache only.

Persistent cache is done only when the lookup has to be
made on same set of values each time.
 
Is This Answer Correct ?    2 Yes 1 No
Abhishek.x.upadhyay
 

 
 
 
Other ETL Interview Questions
 
  Question Asked @ Answers
 
what is SMP AND MPP?   7
list the transformation used for the following:Heterogeneous sources,Homogeneous sources,Find the 5 highest paid employees with in a dept,create a summery table,generate surrogate keys   2
how do u implement unconn.stored proc. in a mapping?   1
what are the parts of Informatica server ? GE 1
Two different admin users created for repository are________and_________.   1
what is the advantage of persistent cache? when it should be used?   1
what is pmrep command?   1
how to connect to a flatfile through ftp in informatica TCS 1
how do u estimate the number of partitions that a mapping really requires? Is it dependent on the machine configuration?   1
what are variable ports and list two situations when they can be used? Satyam 4
what is the meant by Normalization and de-normalization?   2
what are business components in Informatica?   1
 
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