Digital Electronics-Digital Arithmetic Operations and Circuits
Digital Electronics-Digital Arithmetic Operations and Circuits
21. The range of positive numbers when using an eight-bit two's-complement system is:
- 0 to 64
- 0 to 100
- 0 to 127
- 0 to 256
22. What are the two types of basic adder circuits?
- sum and carry
- half-adder and full-adder
- asynchronous and synchronous
- one- and two's-complement
23. A half-adder circuit would normally be used each time a carry input is required in an added circuit.
- TRUE
- FALSE
26. Determine the two's-complement of each binary number.
00110 00011 11101
00110 00011 11101
- 11001 11100 00010
- 00111 00010 00010
- 00110 00011 11101
- 11010 11101 00011
27. Solve this binary problem: 01110010 – 01001000 =
- 00011010
- 00101010
- 01110010
- 00111100
28. What distinguishes the look-ahead-carry adder?
- It is slower than the ripple-carry adder.
- It is easier to implement logically than a full adder.
- It is faster than a ripple-carry adder.
- It requires advance knowledge of the final answer.
29. Half-adders can be combined to form a full-adder with no additional gates.
- TRUE
- FALSE