Set - 4

Question 6 :

In what way interrupts are classified in 8085?

Answer :

In 8085 the interrupts are classified as Hardware and Software interrupts.

Question 7 :

What is the difference between primary & secondary storage device?

Answer :

In primary storage device the storage capacity is limited. It has a volatile memory. In secondary storage device the storage capacity is larger. It is a nonvolatile memory. Primary devices are: RAM / ROM. Secondary devices are: Floppy disc / Hard disk.

Question 8 :

Which Stack is used in 8085?

Answer :

LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.

Question 9 :

What is Program counter?

Answer :

Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.

Question 10 :

What is the RST for the TRAP?

Answer :

RST 4.5 is called as TRAP.