• An Operation also referred to as op can return zero or more tensors which can be used later on in the graph.
• tf.zeros() — creates a matrix full of zeros
• TensorFlow is a framework created by Google for creating Deep Learning models.
• The session run actually causes the execution of three operations in the graph, creating the two constants then the matrix multiplication.
• any variables or operations used outside of the with new_graph.as_default() will be added to the default graph that is created when the library is loaded.

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