2 points 5. If the physical memory address has 20 bits, the maximum amount of memory it can access is 1GB 1 MB 1KB 4GB 2MB 6. "LDR R1. [RO, #4)" updates the base address and uses updated memory 2 points access to access memory content. What is the addressing mode? Pre-index Post-index Pre-index with Update 2 points 7. In arithmetic instructions, data stored in the memory can be as ALU operands directly, for example, SUB RO, R1. [R2] is a valid assembly statement True False 2 points 8. Assembly directives are actual machine commands and can be translated into 32-bit machine code by the assembler. True False