1Z0-1127-25 LLM Fundamentals Practice Question
Which of the following is a decoder-only model architecture?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
GPT-3
GPT is a decoder-only model. BERT is encoder-only. T5 is encoder-decoder.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
T5
Why it's wrong here
T5 is encoder-decoder.
- ✓
GPT-3
Why this is correct
GPT-3 is decoder-only, using masked self-attention.
- ✗
BART
Why it's wrong here
BART is encoder-decoder.
- ✗
BERT
Why it's wrong here
BERT is encoder-only.
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