Some file systems allow disk storage to be allocated at different levels of granularity. for instance, a file system could allocate 8 kb of disk space as a single 8-kb block or as sixteen 512-byte blocks. how could we take advantage of this flexibility to improve performance? what modifications would have to be made to the free-space management scheme in order to support this feature? 12.2 consider a file system on a disk that has both logical and physical block sizes of 512 bytes. assume that the information about each file is already in memory. for each of the three allocation strategies (contiguous, linked, and indexed), answer these questions: how is the logical-to-physical address mapping accomplished in this system? (for the indexed allocation, assume that a file is always less than 512 blocks long.) b. if we are currently at logical block 12 (the last block accessed was block 12) and want to access logical block 3, how many physical blocks must be read from the disk?

Atool that matches persoal skills qualities interests and talets to a career is called a

When making changes to optimize part of a processor, it is often the case that speeding up one type of instruction comes at the cost of slowing down something else. for example, if we put in a complicated fast floating-point unit, that takes space, and something might have to be moved farther away from the middle to accommodate it, adding an extra cycle in delay to reach that unit. the basic amdahl's law equation does not take into account this trade-off. a. if the new fast floating-point unit speeds up floating-point operations by, on average, 2ă—, and floating-point operations take 20% of the original program's execution time, what is the overall speedup (ignoring the penalty to any other instructions)? b. now assume that speeding up the floating-point unit slowed down data cache accesses, resulting in a 1.5ă— slowdown (or 2/3 speedup). data cache accesses consume 10% of the execution time. what is the overall speedup now? c. after implementing the new floating-point operations, what percentage of execution time is spent on floating-point operations? what percentage is spent on data cache accesses?

Ramona enjoys her job because she is able to kids in an after school program. the work value ramona feels strongest about is a. leadership b. risk c. independence d. work with people select the best answer from the choices provided a b c d