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Wgu D686 Objective Assessment 2 Newest D686 Operating Systems for Computer Scientists Oa Final Exam

HEAL100 Health Care — exam and revision material · Other

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Health Care exam material, 11 pages. Originally published on StudyMerit.

Pages
11
Academic year
2025/2026
Language
English

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➢ ➢ ➢ ➢ ➢ WGU D686 WGU D686 OA | Objective Assessment | Questions and Answers | 202 6 Update | 100% Correct. Testbankscove Downloaded by Aisyln Vaughn (samuelkingstone40@gmail.com) lOMoARcPSD|14174986

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Page 1 1. How does demand paging optimize memory usage? A) Loads only the necessary parts of a program B) Allocates memory randomly C) Prevents the use of secondary storage Downloaded by Aisyln Vaughn (samuelkingstone40@gmail.com) lOMoARcPSD|14174986

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D) Loads the entire program into memory Correct answer: A Rationale: Demand paging loads pages into memory only when they are accessed, reducing memory usage. 2. What is the first step in the life cycle of a blocking read request? A) Kernel moves the process to the ready queue B) CPU handles the interrupt C) Process issues a read() system call D) Device driver processes the request Correct answer: C Rationale: The process initiates the I/O operation by calling read(). 3. What does a file - control block (FCB) store? A) File attributes and metadata B) Physical disk layout C) Directory structure D) Device driver information Correct answer: A Rationale: FCB stores metadata like permissions, size, timestamps. Page 2 4. What is the term for wasted memory between allocated partitions in fixed partitioning? A) External fragmentation B) Process allocation in partitions C) Compaction D) Internal fragmentation Correct answer: D Rationale: Fixed partitioning wastes space inside a partition if the process is smaller — that's internal fragmentation. 5. Which method allows adding new rights and removing some rights in an access matrix? Downloaded by Aisyln Vaughn (samuelkingstone40@gmail.com) lOMoARcPSD|14174986

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