6.2 Construct Valid JSON-encoded Files 350-401 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A network engineer has written a JSON file that will be used to configure a set of routers. The file is large and hand-written. Before using it in production, the engineer wants to ensure it is well-formed. Which method is most reliable for validating the JSON?

   • AUse a JSON validator or parser, such as `jq . file.json`
   • BCheck that the file uses consistent indentation
   • CVisually inspect the file for balanced braces and brackets
   • DEnsure that all keys are unique
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2. 7application · medium

   A network engineer is preparing a JSON file to be consumed by an automation tool that requires well-formed JSON. The engineer has written the file by hand and wants to validate it before deployment. Which approach will reliably confirm that the file is valid JSON?

   • AEnsure the file uses single quotes for all strings.
   • BCheck that the file has consistent indentation and no trailing spaces.
   • CRun the file through a JSON parser or validator, such as jq or an online validator.
   • DVerify that the file contains at least one object and one array.
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4. 8application · medium

   A network engineer is building a JSON file to represent a list of interfaces on a switch. Each interface has a name, a status (up/down), and a list of VLANs assigned. The engineer writes the following snippet and runs it through a JSON validator, which reports an error. Which line contains the syntax error?

   • A]}
   • B{"name": "GigabitEthernet0/1", "status": "up", "vlans": [10, 20]}
   • C{"interfaces": [
   • D{"name": "GigabitEthernet0/2", "status": "down", "vlans": [30, 40],}
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5. 9foundation · easy

   In JSON, which data type is used to represent an ordered collection of values?

   • Anumber
   • Barray
   • Cstring
   • Dobject
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6. 10application · medium

   A network automation script needs to represent a hierarchical topology: a site contains multiple devices, and each device has a list of interfaces. Which JSON structure correctly models this relationship?

   • A{"site": "HQ", "devices": {"r1": {"interfaces": "Gi0/0"}, "r2": {"interfaces": "Gi0/0"}}}
   • B{"site": "HQ", "devices": [{"name": "r1", "interfaces": ["Gi0/0", "Gi0/1"]}, {"name": "r2", "interfaces": ["Gi0/0"]}]}
   • C{"site": "HQ", "devices": ["r1", "r2"], "interfaces": ["Gi0/0", "Gi0/1"]}
   • D{"site": "HQ", "devices": {"r1": "Gi0/0", "r2": "Gi0/1"}}
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