Question

1. What does the instruction jal do?

   		It populates the PC with the address given by the input.
   		It saves the current PC (plus 4 bytes) to the $ra register and the populates the PC with the address given by the input.
   		It populates the PC counter with the word currently stored in the $ra register.
   		It allocates the input number of bytes (provided as an immediate value) onto the stack.

1 points   

QUESTION 6

1. What is a function pointer?

   		A variable that holds the name of a function as a string.
   		A variable that holds the address of where a function begins in memory
   		A variables that points to the stack space where a function's input parameter list begins.
   		A variable that holds the return value of a function.

Answer 1

What does the instruction jal do?

Here is the sequence of steps followed in jal instruction

jal sub    # $ra <― PC + 4 
           # PC  <― sub

So, the correct statement is "It saves the current PC (plus 4 bytes) to the $ra register and the populates the PC with the address given by the input"

What is a function pointer?

A variable that holds the address of where a function begins in memory.