NSCT – Memory Management MCQs 20 min Score: 0 Attempted: 0/20 Subscribe 1. . Memory management in an operating system is responsible for: (A) Managing files (B) Allocating and deallocating memory to processes (C) Managing CPU scheduling (D) Managing printersShow All Answers 2. . Which type of memory is directly accessible by the CPU? (A) Main memory (RAM) (B) Secondary memory (C) Cache (D) Hard disk 3. . Contiguous memory allocation means: (A) Process occupies scattered memory locations (B) Memory is virtual (C) Memory is not allocated (D) Process occupies a single contiguous block of memory 4. . External fragmentation occurs when: (A) Memory is divided into fixed-size blocks (B) Free memory is scattered and not usable (C) CPU is idle (D) Processes are too small 5. . Internal fragmentation occurs when: (A) Process cannot fit into memory (B) CPU executes slowly (C) Memory is shared (D) Allocated memory is larger than required, leaving unused space 6. . Paging is a memory management technique that: (A) Allocates memory to files only (B) Uses variable-length memory blocks (C) Allocates memory sequentially (D) Divides memory into fixed-size blocks called pages 7. . In paging, the fixed-size blocks of main memory are called: (A) Pages (B) Registers (C) Blocks (D) Frames 8. . In paging, the blocks of a process are called: (A) Segments (B) Frames (C) Registers (D) Pages 9. . Which technique allows non-contiguous memory allocation without external fragmentation? (A) Paging (B) Segmentation (C) Contiguous allocation (D) Swapping 10. . Segmentation divides a process into: (A) Variable-size segments (B) Fixed-size pages (C) Frames (D) Registers 11. . Which memory management technique combines paging and segmentation? (A) Swapping (B) Contiguous allocation (C) Virtual memory (D) FIFO 12. . Virtual memory allows: (A) Faster CPU speed (B) Only one process to run at a time (C) No memory sharing (D) More processes to run than physical memory 13. . The memory management unit (MMU) is responsible for: (A) CPU scheduling (B) Translating virtual addresses to physical addresses (C) File management (D) Printer management 14. . Swapping is a technique where: (A) CPU is swapped with memory (B) Process is temporarily moved to secondary memory to free RAM (C) Files are swapped (D) Registers are swapped 15. . Which of the following can cause thrashing in memory? (A) High CPU usage (B) Disk scheduling (C) External fragmentation (D) Excessive paging 16. . First Fit, Best Fit, and Worst Fit are algorithms for: (A) CPU scheduling (B) File management (C) Disk scheduling (D) Memory allocation 17. . First Fit memory allocation: (A) Allocates the smallest free block (B) Allocates the largest free block (C) Allocates the first free block large enough for the process (D) Allocates memory randomly 18. . Best Fit memory allocation: (A) Allocates the smallest free block that fits the process (B) Allocates the first available block (C) Allocates the largest block (D) Allocates randomly 19. . Worst Fit memory allocation: (A) Allocates the largest free block (B) Allocates the smallest block (C) Allocates the first available block (D) Allocates randomly 20. . The main goal of memory management is to: (A) Allocate CPU efficiently (B) Ensure efficient and fair use of memory (C) Manage printers (D) Increase disk speed
