An input to the mode pin of an arithmetic/logic unit (ALU) determines if the fun

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Question
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

Correct Answer

arithmetic or logic

Digital Arithmetic Operations and Circuits problems

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2. 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

3. 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.

5. Convert each of the signed decimal numbers to an 8-bit signed binary number (two's-complement).
+7 ?3 ?12
Options
A. 0000 0111 1111 1101 1111 0100
B. 1000 0111 0111 1101 0111 0100
C. 0000 0111 0000 0011 0000 1100
D. 0000 0111 1000 0011 1000 1100

7. 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.

10. 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

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