[Solved] Given the code below, what will be the output of final_output? prompt1 = Prompt(template="Hello, {name}!") prompt2 = Prompt(template="How can I help you today?") chain = Chain().add(prompt1).... | LangChain

LangChain - Prompt Templates

Given the code below, what will be the output of final_output?

prompt1 = Prompt(template="Hello, {name}!")
prompt2 = Prompt(template="How can I help you today?")
chain = Chain().add(prompt1).add(prompt2)
final_output = chain.run({"name": "Alice"})

A"Hello, Alice! How can I help you today?"

B"Hello, {name}! How can I help you today?"

C"Hello, Alice!"

DError: Missing input for prompt2

Step-by-Step Solution

Solution:

Step 1: Understand prompt templates and chaining
Prompt1 uses the variable {name} which is replaced by "Alice". Prompt2 is a fixed string without variables.
Step 2: Analyze chain.run behavior
Running the chain passes the input to prompt1, producing "Hello, Alice!" then continues to prompt2, appending "How can I help you today?".
Final Answer:
"Hello, Alice! How can I help you today?" -> Option A
Quick Check:
Chained prompts combine outputs [OK]

Quick Trick: Chained prompts concatenate outputs with variables replaced [OK]

Common Mistakes:

Thinking prompt2 needs input variables
Expecting placeholders to remain unreplaced
Assuming only first prompt output is returned

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More LangChain Quizzes

Given the code below, what will be the output of final_output?

Step 1: Understand prompt templates and chaining

Step 2: Analyze chain.run behavior

Final Answer:

Quick Check:

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