In this exercise, we will examine how replacement policies affect miss rate. assume a two-way set associative cache with four one-word blocks. consider the following word address sequence: 0, 1, 2, 3, 4, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7, 0. consider the following address sequence: 0, 2, 4, 8, 10, 12, 14, 16, 0
5.20.3 [5] < §§5.4, 5.8> simulate a random replacement policy by flipping a coin. for example, "heads" means to evict the first block in a set and "tails" means to evict the second block in a set. how many hits does this address sequence exhibit?

Aheat pump with refrigerant-134a as the working fluid is used to keep a space at 25°c by absorbing heat from geothermal water that enters the evaporator at 500c at a rate of 0.065 kg/s and leaves at 40°c. the refrigerant enters the evaporator at 20°c with a quality of 23 percent and leaves at the inlet pressure as saturated vapor. the refrigerant loses 300 w of heat to the surroundings as it flows through the compressor and the refrigerant leaves the compressor at 1.4 mpa at the same entropy as the inlet. determine: (a) the degrees of subcooling of the refrigerant in the condenser, b)-the mass flow rate of the refrigerant . (c) the heating load and the cop of the pump, and d)-the theoretical minimum power input to the compressor for the same heating load.