Question $20$

Which of the following is a group of bits that tells the computer to perform a particular operation?

accumulator

register

instruction code

none of the mentioned

Question $21$

Which of the following is equal to $4$ bits?

Byte

Nibble

Record

All of the mentioned

Question $22$

What is the content of stack pointer $($ESP$)?$

Address of the top element in the stack

Address of current instruction

Address of next instruction

None of the above

Question $23$

Which of the following is performed by half adder?

Binary addition operation for $2$ decimal inputs

Binary addition operation for $2$ binary inputs

Decimal addition operation for $2$ decimal inputs

Decimal addition operation for $2$ binary inputs