[amp_mcq option1=”Program counter” option2=”Y register” option3=”Status register” option4=”Trap base register” correct=”option4″]
The correct answer is D. Trap base register.
The trap base register (TBR) is a register in the SPARC processor that contains the address of the trap vector table. The trap vector table is a table of addresses of routines that are called when the processor encounters a trap.
The program counter (PC) is a register that contains the address of the next instruction to be executed. The Y register is a general-purpose register that can be used for any purpose. The status register (SR) contains information about the state of the processor, such as the current mode and the condition codes.
When the processor encounters a trap, it loads the address of the trap vector table from the TBR and then branches to the appropriate routine in the trap vector table. The trap vector table is typically located in memory, but it can also be located in a special register called the trap address register (TAR).
The trap vector table is a very important part of the SPARC processor. It allows the processor to handle a variety of traps in a consistent and efficient manner.