Program Status Word (PSW) - MCQs with answers

Program Status Word (PSW) - MCQs with answers

1. Which bit/s play/s a significant role in the selection of a bank register of Program Status Word (PSW)?

a. RS1
b. RS0
c. Both a & b
d. None of the above

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2. Which flags represent the least significant bit (LSB) and most significant bit (MSB) of Program Status Word (PSW) respectively?

a. Parity Flag & Carry Flag
b. Parity Flag & Auxiliary Carry Flag
c. Carry Flag & Overflow Flag
d. Carry Flag & Auxiliary Carry Flag

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3. Which register bank is supposed to get selected if the values of register bank select bits RS1 & Rs0 are detected to be '1' & '0' respectively?

a. Bank 0
b. Bank 1
c. Bank 2
d. Bank 3

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4. It is possible to set the auxiliary carry flag while performing addition or subtraction operations only when the carry exceeds ______________

a. 1st bit
b. 2nd bit
c. 3 rd bit
d. 4th bit

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