11Busy waiting means:AA process repeatedly checks a condition, using CPU while waitingBA process is swapped outCA process is terminatedDA process sleepsView AnswerDiscussWorkspaceReportSaveEasy
12A semaphore is:AA file lock onlyBAn integer variable accessed only through atomic wait (P) and signal (V) operationsCA memory pageDA type of processView AnswerDiscussWorkspaceReportSaveEasy
13The wait (P) operation on a semaphore:ADeletes itBDecrements it and blocks if the value becomes negativeCResets it to zeroDIncrements itView AnswerDiscussWorkspaceReportSaveEasy
14A critical section is:AA protected memory areaBThe first line of a programCA part of code that accesses shared resources and must not run concurrentlyDA hardware componentView AnswerDiscussWorkspaceReportSaveEasy
15Which classical problem models processes that read shared data and processes that write it?ADining philosophers problemBReaders–writers problemCProducer–consumer problemDSleeping barber problemView AnswerDiscussWorkspaceReportSaveEasy