Which of the following statements about DDPG are correct?
DDPG maintains four networks: actor, critic, target actor, and target critic
The critic is trained by minimising the Bellman error using off-policy data sampled from the replay buffer
DDPG is directly applicable to discrete action spaces without modification
The actor is updated by ascending the gradient of the critic's Q-value with respect to actor parameters
Correct answers
DDPG maintains four networks: actor, critic, target actor, and target critic
The critic is trained by minimising the Bellman error using off-policy data sampled from the replay buffer
The actor is updated by ascending the gradient of the critic's Q-value with respect to actor parameters
Question 6 of 21 in the IIT Madras BS Reinforcement Learning (Reinforcement Learning) End Term paper sat on 10 May 2026, in the January 2026 term (Reinforcement Learning 10 May 26 (Session 2)). It carries 1 mark.
