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NEW QUESTION: 1
You must remove the user harhest from your Oracle Linux system because the person has left the company:
User harhest has numerous files, directories, and a crontab.
You issue:
Userdel -r harhest
Which three outcomes result from the execution of this command?
A. crontab /var/spool/cron/harhest is removed.
B. The home directory of harhest is removed.
C. Files owned by narhest in any directory are removed.
D. Files in the harhest home directory are removed.
E. The /var/spool/mail/harhest mailbox is removed.
F. All directories owned by harhest are removed.
Answer: B,D,E
Explanation:
Explanation
The userdel command modifies the system account files, deleting all entries that refer to the user name LOGIN. The named user must exist.
parameter -r
-r, --remove
Files in the user's home directory will be removed along with the home directory itself and the user's mail spool. Files located in other file systems will have to be searched for and deleted manually.
NEW QUESTION: 2
You receive an error when importing data into the pilot instance. You need to troubleshoot the error. What should you do first?
Answer:
Explanation:
Explanation
NEW QUESTION: 3
You are developing a Windows Communication Foundation (WCF) service to provide an in-memory cache. The following code is part of your solution. (Line numbers are included for reference only.)
01
02 public interface IInMemoryCacheService
03 {
04 [OperationContract()]
05 string GetCachedItem(string key);
06
07 [OperationContract()]
08 void CacheItem(string key, string item);
09
10 }
11
12 [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)]
13 public class CacheService : IInMemoryCacheService
14 {
15
16 Hashtable cache = new Hashtable();
17
18 public string GetCachedItem(string key)
19 {
20 return cache(key).ToString();
21 }
22
23 public void CacheItem(string key, string item)
24 {
25 if (cache.Contains(key))
26 cache.Remove(key);
27 cache.Add(key, item);
28 }
29 }
Users report that the cache is getting updated with cache changes of other users.
You need to ensure that each user's cache is maintained and isolated from other users.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)
A. Insert the following code at line 01.
[ServiceContract(SessionMode=SessionMode.NotAllowed)]
B. At line 12, replace InstanceContextMode.Single with InstanceContextMode.PerSession.
C. Insert the following code at line 01.
[ServiceContract(SessionMode=SessionMode.Required)]
D. At line 12, replace InstanceContextMode.Single with InstanceContextMode.PerCall.
Answer: B,C
Explanation:
Explanation/Reference: InstanceContextMode enumeration
(http://msdn.microsoft.com/en-us/library/system.servicemodel.instancecontextmode.aspx)
PerSession
A new InstanceContext object is created for each session.
PerCall
A new InstanceContext object is created prior to and recycled subsequent to each call.
If the channel does not create a session this value behaves as if it were PerCall.
Single
Only one InstanceContext object is used for all incoming calls and is not recycled subsequent
to the calls.
If a service object does not exist, one is created.
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