(w) rheone, Au finterinonesy: 9. Paradevim cDato and rasky. (1) carch tuark. A9 Prownovive achedulious. ) Whoushouar. 2. Direcr memory ancress is used for high-spered 20 devices in order to avoiat increasing the CPD's execution loud. (Bjp) 4) How does the CPU interface with the device to coordinate the transter? b) How does the CCPU know when the memory operations are complete? c) The CPU is allowcd to execute other programs while the DMA controller is transferring. dara. Does this process interfere with the execution of the user programs? It so, describe what forms of interference are caused. 3. Whar are the benefirs and the disadvantages of each of the following? Cansider both the System level and the programmer level. (10p) d) Syrhchromous and asyrichronous communication. Automatic and explicit buffering Send by copy and send by neference Zixerisized and Variable-sized messages (w) rheone, Au finterinonesy: 9. Paradevim cDato and rasky. (1) carch tuark. A9 Prownovive achedulious. ) Whoushouar. 2. Direcr memory ancress is used for high-spered 20 devices in order to avoiat increasing the CPD's execution loud. (Bjp) 4) How does the CPU interface with the device to coordinate the transter? b) How does the CCPU know when the memory operations are complete? c) The CPU is allowcd to execute other programs while the DMA controller is transferring. dara. Does this process interfere with the execution of the user programs? It so, describe what forms of interference are caused. 3. Whar are the benefirs and the disadvantages of each of the following? Cansider both the System level and the programmer level. (10p) d) Syrhchromous and asyrichronous communication. Automatic and explicit buffering Send by copy and send by neference Zixerisized and Variable-sized messages