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Question 26 A preemptive version of shortest job first is Not yet answered Marked out of 1.00 O a. round-robin scheduling O b. shortest remaining time first Flag question O c. first-come first served d. three-level scheduling O e. none of these. Question 27 In CPU-bound processes Not yet answered Marked out of 1.00 O a. A good process mix is achieved Flag question O b. Synchronization cannot be performed correctly O c. The wait times may be too big O d. More time spent in computation than I/O O e. More time spent in I/O than computation Question 28 Which one of the following statements is correct about command line interpreters? Not yet answered Marked out of 1.00 O a. Some commands are implemented within the command line interpretter and others are implemented as external files. Flag question Ob. All commands must be implemented within the command line iterpreter itself. O c. Some commands are implemented within the command line interpreter but cannot be called from the command line. O d. All commands can be called from the command line but none of them is implemented within the command line interpreter. Question 29 Not yet answered What data structure contains information about a process' state, its program counter, stack pointer, and other information? Marked out of 1.00 O a. the scheduler Flag question O b. the interrupt vector O c. process control block O d. the thread e. none of these Question 30 Not yet How many instructions can a processor execute at a time? answered Marked out of 1.00 O a. Depends on the operating system Flag question O b. Two O c. One O d. Equal to the number of processes in the ready queue O e. Equal to the number of concurrent processes in memory