You are defining a .proto file for a gRPC service that reports sensor readings. Each reading has a timestamp (Unix epoch in seconds) and a value that can be fractional. Which scalar types should you use for the 'timestamp' and 'value' fields?

int32 timestamp = 1; double value = 2;

string timestamp = 1; double value = 2;

uint32 timestamp = 1; float value = 2;

int64 timestamp = 1; double value = 2;

A developer on your team is writing a gRPC service that receives a Junos configuration message. The message has a field 'mtu' defined as int32. When a client sends a message without setting 'mtu', the server-side generated code reads the field. What value will the server observe?

The field is skipped during deserialization

What is the recommended practice for removing a field from a .proto message while maintaining compatibility?

Delete the field and reuse its field number for a new field

Keep the field number but mark it as reserved

Rename the field to indicate it is deprecated

Change the field type to a different type

How does Protocol Buffers maintain backward compatibility when adding a new field to a message?

By reusing an existing field number that is no longer in use

By removing old fields to reduce message size

By changing the message name to indicate a new version

By assigning a new field number that has not been used before

Juniper NetworksCertified Specialist, Automation and DevOps (JNCIS-DevOps)

Domain 2Objective 1

Proto Buff JN0-423 Practice Questions (Page 4)

Part of the gRPC domain, which makes up ~29% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~10–17 in this domain), expect 2–3 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

8concepts

Questions 16–20

16application · medium
You are defining a .proto file for a gRPC service that reports sensor readings. Each reading has a timestamp (Unix epoch in seconds) and a value that can be fractional. Which scalar types should you use for the 'timestamp' and 'value' fields?
Select an answer first
17application · easy
A developer on your team is writing a gRPC service that receives a Junos configuration message. The message has a field 'mtu' defined as int32. When a client sends a message without setting 'mtu', the server-side generated code reads the field. What value will the server observe?
Select an answer first
18foundation · easy
What is the recommended practice for removing a field from a .proto message while maintaining compatibility?
Select an answer first
19foundation · easy
What is the process of converting a byte array back into a Protocol Buffers message object called?
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20foundation · easy
How does Protocol Buffers maintain backward compatibility when adding a new field to a message?
Select an answer first

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