During the Execution of a Program Which Gets Initializes First?

During the execution of a program which gets initialized first? Explanation: For the execution of a process first the instruction is placed in the PC.

Is the first register that get initialize during the program execution?

The answer to this question is Program Counter.

Which operation is performed by this instruction add Loca R0?

Individual instructions are brought from the memory into the processor, which executes the specified operations. Data to be stored are also stored in the memory. Examples: - Add LOCA, R0 This instruction adds the operand at memory location LOCA, to operand in register R0 & places the sum into register.