You are implementing a method in an ASP.NET application that includes the following requirements.
* Store the number of active bugs in the cache.
* The value should remain in the cache when there are calls more often than every 15 seconds.
* The value should be removed from the cache after 60 seconds.
You need to add code to meet the requirements.
Which code segment should you add?
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A.
Cache.Insert(“ActiveBugs”, result, null, DateTime.Now.AddSeconds(60), TimeSpan.FromSeconds(15));
B.
Cache.Insert(“Trigger”, DateTime.Now, null, DateTime.Now.AddSeconds(60), Cache.NoSlidingExpiration);
CacheDependency cd = new CacheDependency(null, new string[] { “Trigger” });
Cache.Insert(“ActiveBugs”, result, cd, Cache.NoAbsoluteExpiration, TimeSpan.FromSeconds(15));
C.
Cache.Insert(“ActiveBugs”, result, null, Cache.NoAbsoluteExpiration, TimeSpan.FromSeconds(15));
CacheDependency cd = new CacheDependency(null, new string[] { “ActiveBugs” });
Cache.Insert(“Trigger”, DateTime.Now, cd, DateTime.Now.AddSeconds(60), Cache.NoSlidingExpiration);
D.
CacheDependency cd = new CacheDependency(null, new string[] { “Trigger” });
Cache.Insert(“Trigger”, DateTime.Now, null, DateTime.Now.AddSeconds(60), Cache.NoSlidingExpiration);
Cache.Insert(“ActiveBugs”, result, cd, Cache.NoAbsoluteExpiration, TimeSpan.FromSeconds(15));
Explanation:
doubtful answer
You cannot set both the absoluteExpiration and slidingExpiration parameters. If you intend the cache item to expire at a specific time, you set the absoluteExpiration parameter to the specific time, and the slidingExpiration parameter to NoSlidingExpiration.
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this is why A is wrong
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