Question Detail User programs interact with I/O devices through ? Operating SystemHardwareBusesProcessor Answer: Option A Similar Questions : 1. Which technique helps processor to run a program concurrently with input output operations ? IOPDMAInterrupt driven I/ODCA Answer: Option C 2. The unit which decodes and translates each instruction and generates the necessary enable signals for ALU and other units is called ALUControl UnitCPULogical Unit Answer: Option B 3. An instruction code must specify the address of the ? OperandOpecodeBoth of aboveNone of above Answer: Option A 4. A number system that uses only two digits, 0 and 1 is known as ? Octal number systemHexadecimal systemBinary systemDecimal system Answer: Option C 5. Which is used for this and known as high speed buffer exist with almost each process ? PrimarySecondaryCacheRAM Answer: Option C Read more from - Computer System Architecture Questions Answers