CompSys E3

Which one holds in non-preemptive batch scheduling?

• Wait Time + Hold Time

  = Execution Time

• Execution Time - Wait Time

  = Hold Time

• Hold Time + Execution Time

  = Wait Time

Which is often the most important metric in interactive scheduling?

• Execution Time

• Response Time

• Wait Time

• Hold Time

Convoying is best described as:

• A long-running job gets preempted repeatedly by new arriving shorter jobs thus greatly increasing its wait time.

• A long-running job blocks many shorter jobs and thus greatly inflates mean wait times.

• A high-priority process is blocked because a low-priority is holding the lock and won't get dispatched to release the lock.

Which job will get dispatched first using SJF?

• A

• B

• C

• D

Which of these have we seen as solutions to priority inversion?

• Priority Ancestors

• Priority Ceiling

• Priority Floor

• Priority Inheritance

Which of these can be used to avoid moving data through cpu while copying data from a device to RAM? (Select best fit)

• Registers

• MMU

• DMA

• Interrupts

Calling EXEC never returns

• True

• False