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Final Examination 1. When designing a processor microarchitecture, the use of a cache to mask the complexity imposed by long memory load times is an example of (a) abstraction. (b) discipline. (c) hierarchy. (d) regularity. 2. A 4-bit binary number can represent this many different values: (a) 4 (b) 8 (c) 16 (d) 32 3. 02ED is the equivalent to (a) 74910 (b) 13578 (c) 0010111011112 (d) More than one of the above 4. Two's-complement as a number system has the following advantages over the sign/magnitude system: (a) A larger range of values (b) Can be added on a standard adder (c) Only one value to represent zero (d) All of the above 5. A half-adder differs from a full adder in that it (a) can only add one bit to one bit. (b) does not have a carry-in line. (c) does not have a carry-out line. (d) All of the above. 6. An example of a carry propagate adder is a (a) ripple-carry adder. (b) carry-lookahead adder. (c) prefix adder. (d) All of the above. 7. The IEEE 754 floating-point notation differs from the fixed point notation in that it (a) includes an implicit leeding bit. (b) hes an implicit binary point to differentiate the whole-number component from the fractional component. (c) includes a sign bit. (d) All of the above. 8. DRAM (a) does not need to be continuously powered. (b) stores a bit as the presence or absence of charge on a capacitor. (c) Both of the above. (d) None of the above. 9. SRAM (a) does not need to be continuously powered. (b) stores a bit as the presence or absence of charge on a capacitor. (c) Both of the above. (d) None of the above. 10. ROM (a) does not need to be continuously powered. (b) stores a bit as the presence or absence of charge on a capacitor. (c) Both of the above. (d) None of the above. 11. R-type instructions always have an rd, rt, and rs field, because (a) R-type instrucitons always use three registers. (b) it makes the common case fast. (c) simplicity favors regularity. (d) smaller is faster. 12. The following are I-type instructions: (a) addi (b) lw (c) sw (d) All of the above