Event Scripts JN0-423 Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   An event script is used to automatically roll back the configuration if a commit causes a critical interface to go down. The script runs a 'show interfaces' command and checks the status. The engineer is concerned that the script might fail to detect the interface status due to a transient error in the CLI command. What is the most robust way to handle this in the script?

   • AWrap the CLI command in a try-except block, and if an exception occurs, log the error and retry the command a few times before giving up.
   • BUse the 'jcs:output' function to print the command output and rely on the operator to check it manually.
   • CExecute the command only once and assume the output is correct.
   • DDisable error handling entirely so the script fails fast and the operator is alerted.
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2. 12foundation · easy

   Which construct is commonly used in an event script to handle errors?

   • Aif statements
   • Bvariable declarations
   • Ctry-catch blocks
   • Dfor loops
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4. 13foundation · easy

   Which scenario is a typical use case for a Junos event script?

   • AReplacing the routing protocol daemon
   • BAutomatically capturing a core dump when a process crashes
   • CManually applying a configuration change during maintenance
   • DProviding a web-based dashboard for monitoring
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5. 14application · medium

   A data center operator wants to automatically generate a support bundle and email it to the NOC whenever a critical alarm is raised on a QFX switch. The engineer is evaluating whether to use an event script or a traditional syslog-based monitoring system. What is the primary advantage of using a Junos event script for this task?

   • AEvent scripts can replace the need for any external monitoring system entirely.
   • BEvent scripts run directly on the device, allowing immediate collection of diagnostics without waiting for an external system to poll.
   • CEvent scripts can be written in any programming language, including C++ and Java.
   • DEvent scripts are automatically replicated to all devices in a chassis cluster.
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6. 15foundation · easy

   Which feature is used to debug an event script by logging its execution details?

   • Ashow log messages
   • Btraceoptions
   • Crequest system reboot
   • Dcommit check
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