Which of the following expressions is in the sum-of-products form? (A + B)(C + D

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Question
Which of the following expressions is in the sum-of-products form?
Options
A. (A + B)(C + D)
B. (AB)(CD)
C. AB(CD)
D. AB + CD

Correct Answer

AB + CD

Combinational Logic Circuits problems

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2. Each "1" entry in a K-map square represents:
Options
A. a HIGH for each input truth table condition that produces a HIGH output.
B. a HIGH output on the truth table for all LOW input combinations.
C. a LOW output for all possible HIGH input conditions.
D. a DON'T CARE condition for all possible input truth table combinations.

3. Which of the following statements accurately represents the two BEST methods of logic circuit simplification?
Options
A. Boolean algebra and Karnaugh mapping
B. Karnaugh mapping and circuit waveform analysis
C. Actual circuit trial and error evaluation and waveform analysis
D. Boolean algebra and actual circuit trial and error evaluation

5. The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?
Options
A. A > B = 1, A < B = 0, A < B = 1
B. A > B = 0, A < B = 1, A = B = 0
C. A > B = 1, A < B = 0, A = B = 0
D. A > B = 0, A < B = 1, A = B = 1

7. The implementation of simplified sum-of-products expressions may be easily implemented into actual logic circuits using all universal ________ gates with little or no increase in circuit complexity. (Select the response for the blank space that will BEST make the statement true.)
Options
A. AND/OR
B. NAND
C. NOR
D. OR/AND

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