High REST Question 189 of 226

When would you pick gRPC over JSON REST between internal Java services?

Java Specialist · Speak this in 60–90 seconds · Faridabad & Delhi NCR

PICTURE THIS: A REST CALL

ClientGET /users/1

ServerFind row

JSON back200 OK

Simple meaning

gRPC gives typed protobuf contracts, HTTP/2 multiplexing, and cheaper payloads for chatty internal RPCs.

WHY — REST instead of guessing?

Why interviewers care about REST:

They are checking judgment

on REST.

A good answer names

the situation, the default choice, and one exception - that reads as experience.

Stay structured

Name the idea, why it exists, then one short example.

Close cleanly

End with when you use it and one common pitfall.

STEPS — What happens step by step?

Before you speak the answer, walk the interviewer through these steps:

1
gRPC gives typed protobuf
contracts, HTTP/2 multiplexing, and cheaper payloads for chatty internal RPCs.
2
REST/JSON stays better for
public browsers, curl debugging, and third-party partners.
3
Many companies expose REST
at the edge and gRPC inside the mesh.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

EXAMPLE — See it in action

Here's a short line you can speak, broken into clear beats:

Say this line

“REST/JSON stays better for public browsers, curl debugging, and third-party part”

Break into beats

RESTJSONstaysbetterforpublic

Speaking order

2987408337471632900

Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

Key takeaway

gRPC gives typed protobuf contracts, HTTP/2 multiplexing, and cheaper payloads for chatty internal RPCs. REST/JSON stays better for public browsers, curl debugging, and third-party partners.