Riverbed Riverbed Certifications 499-01 Questions & Answers

• Question 181:

  JIDA automatically collects metrics from predefined categories of classes except:

  A. EJBs: classes that implement the javax.ejb.EntityBean or javax.ejb.SessionBean interfaces

  B. JDBC - classes that implement any of several interfaces in the java.sql package

  C. JNDI - classes that implement the javax.naming.Context or javax/naming/directory/DirContext interfaces

  D. Portlets - classes that implement the javax.portlet.Portlet interface

  E. Generic classes

  Correct Answer: E

• Question 182:

  Which statement is incorrect about how dynamic sampling agents (DSAs) manage 1- second data storage?

  A. By default, the DSA attempts to keep 1-second data for 2 hours. The length of this time period is specified by the RawDataPersistDuration attribute in the dsa.xml file.

  B. The DSA deletes the oldest 1-second data from the database If there is less than 10 percent of free disk space (the default for the RawDataPersistFreeSpaceTargetPercent attribute)

  C. The DSA deletes the oldest 1-second data from the database if the database file is larger than specified in the RawDataPersistMaxDiskTarget attribute (unlimited as default).

  D. If both the RawDataPersistFreeSpaceTargetPercent and RawDataPersistMaxDiskTarget attributes are satisfied, the DSA deletes data, if necessary, to retain only as much data as specified by RawDataPersistDuration.

  E. At startup, and every 2 hours thereafter (or the frequency specified by RawDataPersistPurgeInterval), the DSA deletes the oldest 1-second data from the database.

  Correct Answer: A

• Question 183:

  How do you control the overhead of AppInternals Xpert agents?

  A. Install agents on a limited number of machines.

  B. Restart the server.

  C. Agents self tune so there is no need to control the overhead.

  D. Never install more than 5 agents.

  E. Use multiple consoles.

  F. Unplug the server.

  Correct Answer: C

• Question 184:

  What is the most recommended network time protocol (NTP) configuration for AppInternal Xpert?

  A. Managed nodes use the embedded client and synchronize with a common server.

  B. Managed nodes use the embedded NTP client and synchronize with symmetric multiprocessing (SMP).

  C. Managed nodes use their own NTP client.

  D. No specific NTP configuration is needed, as AppInternal Xpert could handle the correct timing by itself.

  Correct Answer: B

• Question 185:

  This change will not require a restart in the application when using AppInternals Xpert:

  A. Changes in jida.config

  B. Enabling monitoring of generic classes with config.package metrics

  C. Changes in the -agentpath parameter

  D. Enabling cross-tier transactions

  Correct Answer: B

• Question 186:

  By default, the analysis engine uses a "moving-window" algorithm to determine dynamic limits. You can change the algorithm by changing the DynamicLimitsAlgorithm attribute to any of these values, except:

  A. MovingWindowPercentile

  B. MovingWindowSigma

  C. HourlyLimits

  D. HistoricalBaseline

  E. HardLimits

  Correct Answer: E

• Question 187:

  How should you instrument a Java application when a command line to start the application is not readily accessible?

  A. This is not feasible currently.

  B. Recompile or modify the code.

  C. Set the JAVA_TOOL_OPTIONS environment variable to add the argument into the application start up.

  D. We should not instrument applications that use embedded virtual machines.

  Correct Answer: C

• Question 188:

  In AppInternals Xpert consoles, you can click on a transaction trace or metric to open the line of source code that defines the generic class.method that generated that transaction or metric when applicable. Which statements are true regarding linking between source code and AppInternals Xpert data? (Select 3)

  A. You can toggle back and forth between the source code and the AppInternals Xpert performance data to examine selected class/method transactions that exceed a particular duration.

  B. You can open the source code directly into Transaction Trace Warehouse.

  C. In Visual Studio or Eclipse source code, you can click on the name of a generic method or click inside the code for the method and link to traces on transactions that the .NET or Java code generated, and display those transactions in Transaction Trace Warehouse.

  D. You can click on the name of a generic method or click inside the code for the method and link to AppInternals Xpert metrics that the method generated, displaying in the desktop console.

  E. You can open the source code directly into Transaction Trace Analysis.

  Correct Answer: ACD

• Question 189:

  Which tab in the AppInternals Xpert interface do you use to enable continuous tracing for JIDA and .Net data adapter instances?

  A. Metric Filters

  B. Schedule

  C. Users

  D. Configure Groups

  Correct Answer: D

• Question 190:

  Which metrics help the user perform heap analysis? (Select 3)

  A. Percent of free heap

  B. Percent of time garbage collecting

  C. Percent of usage

  D. Average number of live objects

  Correct Answer: ABD