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Data Structure?

 
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This was one of the interview question that I faced.

A log file contains the text in the following format
logTime appName loglevel logText
logTime appName loglevel logText
logTime appName loglevel logText
logTime appName loglevel logText
.
.
.
.
n

which is the best suited Data structure for this. Such that we can search logs. For instance log search with condition as logTime or condition as LogTime and appName?
 
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Two Master tables for App Name and Log level. Another table having log time, log text and FKs from master tables. Total 3 tables required.

Then you can query DB using various JOINs.

???!!!
 
Nikhil Jain
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which Data Structure. No DB is to be used.
 
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Sorry, you asked what was the best. A database would be best.
 
It is sorta covered in the JavaRanch Style Guide.
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