If each core in a 16-core processor has a yield of 90% and nothing else on the chip fails. what is the yield of the chip ?

The correct answer is option 2.

Key Points  A multi-core processor is a computer processor on a single integrated circuit with two or more separate processing units, called cores, each of which reads and executes program instructions.

Given that,  

Number of core = 16-core 

Processor yield = 90% (0.9)

Since there is no failure rate of the chip and as it is a 16-core processor with 90 % efficiency,

All the cores must work,  therefore, the yield of the chip is (0.9)¹⁶.

Hence the correct answer is (0.9)16.