What is wrong, if anything, with the circuit in the given figure based on the lo

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Question
What is wrong, if anything, with the circuit in the given figure based on the logic analyzer display accompanying the circuit?
Options
A. The CO terminal is shorted to ground.
B. The S1 output is shorted to V_cc.
C. The P1 input is not being added into the total.
D. Nothing is wrong; the circuit is functioning correctly.

Correct Answer

The P1 input is not being added into the total.

Digital Arithmetic Operations and Circuits problems

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2. An input to the mode pin of an arithmetic/logic unit (ALU) determines if the function will be:
Options
A. one's-complemented
B. arithmetic or logic
C. positive or negative
D. with or without carry

4. Which of the statements below best describes the given figure?
Options
A. Half-carry adder; Sum = 0, Carry = 1
B. Half-carry adder; Sum = 1, Carry = 0
C. Full-carry adder; Sum = 1, Carry = 0
D. Full-carry adder; Sum = 1, Carry = 1

5. What distinguishes the look-ahead-carry adder?
Options
A. It is slower than the ripple-carry adder.
B. It is easier to implement logically than a full adder.
C. It is faster than a ripple-carry adder.
D. It requires advance knowledge of the final answer.

8. Convert each of the decimal numbers to two's-complement form and perform the addition in binary.

+13 ?10

add ?7 add +15
Options
A. 0001 0100 0000 0101
B. 0000 0110 0001 1001
C. 0000 0110 0000 0101
D. 1111 0110 1111 0101

10. What is the major difference between half-adders and full-adders?
Options
A. Nothing basically; full-adders are made up of two half-adders.
B. Full adders can handle double-digit numbers.
C. Full adders have a carry input capability.
D. Half adders can handle only single-digit numbers.

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