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OS FA3-4
OS FA3 to FA4
| Question | Answer |
|---|---|
| In this process, if a new hole is adjacent to other holes, the system merges these adjacent holes to form one larger hole. Group of answer choices paging scheduling compaction coalescing | coalescing |
| It occurs when a process requiring m memory locations reside in a partition with n memory locations where m < n. Group of answer choices Internal fragmentation External fragmentation swapping dynamic loading | Internal fragmentation |
| A hardware device that performs the run-time mapping from logical to physical addresses Group of answer choices Memory management unit Page table Control unit Arithmetic logic unit | Memory management unit |
| It refers to a collection of processes that are residing in main memory and are ready and waiting to execute Group of answer choices device queue thread queue job queue ready queue | ready queue |
| An address generated by the CPU. Group of answer choices Logical address IP address offset address physical address | Logical address |
| Given the following details below: Main Memory Size = 64 bytes Process Size = 32 bytes Page or Frame Size = 4 bytes Compute for the number of frames. Group of answer choices 4 8 12 16 | 16 |
| Multi programming allows to keep many processes in memory simultaneously Group of answer choices True False | True |
| Over-allocated memory occurs if there is a need to transfer a page from disk to memory but there is ____ memory space available Group of answer choices no big free huge | no |
| One major advantage of virtual memory is that programs can be ________ than physical memory. Group of answer choices reduced smaller larger shorter | larger |
| It is a technique that allows the execution of processes that may not be completely in memory. Group of answer choices Physical memory Virtual memory Cache memory Executable memory | Virtual memory |
| In demand paging system, there is an additional bit in the page table which is the valid-invalid bit Group of answer choices True False | True |
| This bit is set to invalid to indicate that a corresponding page is in secondary storage. Group of answer choices True False | True |
| The effectiveness of the demand paging is based on a property of computer programs called the _______. Group of answer choices globality of reference publicity of reference privacy of reference locality of reference | locality of reference |
| Demand paging system is similar to paging system with swapping. Group of answer choices True False | True |
| It is important to keep the page-fault rate _____ in a demand-paging system. Group of answer choices high medium medium high low | low |
| The modify bit for a page is set whenever any word or byte is written into, indicating that the page has been modified Group of answer choices True False | True |
| Directions: Solve the given reference string below using 4 frames in the following page replacement algorithms. 1 3 0 3 5 6 3 Using Least Recently Used (LRU) algorithm, the number of page faults is ________. Group of answer choices 7 5 6 4 | 5 |
| Directions: Solve the given reference string below using 4 frames in the following page replacement algorithms. 9 5 7 9 1 1 4 8 0 1 0 2 Using OPTIMAL algorithm, the number of page faults is ________. Group of answer choices 13 12 8 7 | 8 (correct answer is actually 9) |
| Directions: Solve the given reference string below using 4 frames in the following page replacement algorithms. 9 5 7 9 1 1 4 8 0 1 0 2 7 Using First-In-First-Out (FIFO) algorithm, the number of page hits is ________. 6 11 9 4 | 4 |
| Directions: Solve the given reference string below using 3 frames in the following page replacement algorithms. 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1 Using (FIFO) algorithm, the number of page hits is ________. 13 5 6 12 | 5 |
| Directions: Solve the given reference string below using 5 frames in the following page replacement algorithms. 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1 Using OPTIMAL algorithm, the number of page faults is ________. 7 8 13 12 | 7 |
| Directions: Solve the given reference string below using 3 frames in the following page replacement algorithms. 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1 Using (FIFO) algorithm, the number of page faults is ________. 14 13 12 15 | 15 |
| Directions: Solve the given reference string below using 5 frames in the following page replacement algorithms. 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1 Using (FIFO) algorithm, the number of page hits is ________. 12 11 10 13 | 11 |
| Directions: Solve the given reference string below using 3 frames in the following page replacement algorithms. 1 3 0 3 5 6 3 Using First-In-First-Out (FIFO) algorithm, the number of page hits is ________. Group of answer choices 2 13 1 12 | 1 |
| Directions: Solve the given reference string below using 3 frames in the following page replacement algorithms. 1 3 0 3 5 6 3 Using OPTIMAL algorithm, the number of hits is ________. Group of answer choices 9 3 7 1 | 1 (correct answer is actually 2) |
| Directions: Solve the given reference string below using 4 frames in the following page replacement algorithms. 1 3 0 3 5 6 3 Using OPTIMAL algorithm, the number of page faults is ________. Group of answer choices 6 5 7 4 | 5 |
| The size of a logical block is usually ____ bytes. Group of answer choices 215 512 125 64 | 512 |
| A typical hard disk have a rotation speed from __ Group of answer choices 3500 to 7200 4500 to 7200 500 to 1200 3500 to 6200 | 4500 to 7200 |
| It is a way to read and write data on disks, where the number of bits per track is uniform (constant number of sectors). Group of answer choices Constant Linear Velocity Constant Line Velocity Constant Angular Velocity Constant Angle Velocity | Constant Angular Velocity |
| Modern disks are addressed as large one-dimensional arrays of logical blocks, where the ______ is the smallest unit of transfer. Group of answer choices physical block local block sector block logical block | logical block |
| These disks are coated with a hard surface, so the read-write head scans it directly on the disk surface without destroying the data. Group of answer choices flappy disks Blu-ray discs floppy disks compact discs | floppy disks |
| A disk normally has a device _______ indicating which files are on the disk. Group of answer choices directory block housing cabinet | directory |
| The main requirement of secondary storage is to be able to store very large amount of data _______ Group of answer choices everyday temporarily sometime permanently | permanently |
| It provides the bulk of secondary storage for modern computer systems. Group of answer choices RAM Magnetic Disk Registers Cache memory | Magnetic Disk |
| It is the time it takes for the sector to rotate under the head. Group of answer choices Rotation time Latency time Transfer Time Seek time | Latency time |
| ______ are rigid metal or glass platters covered with magnetic recording material. Group of answer choices Disks Video tape Flash Drive Compact Disc | Disks |
| The First Come First Served disk scheduling selects the request according to the order in the disk queue Group of answer choices True False | True |
| Since most jobs depend heavily on the disk for loading and input and output files, it is important that disk service be as fast as possible. Group of answer choices True False | True |
| C-SCAN scheduling essentially treats the disk as though it were circular where the last track is adjacent to the first one. Group of answer choices True False | True |
| The OS can improve on the average disk service time by scheduling the requests for disk access. Group of answer choices True False | True |
| LOOK disk scheduling algorithm is sometimes called the elevator algorithm Group of answer choices True False | False |
| Directions: Given the following track requests in the disk queue compute for the total head movement (THM) of the R/W Head 39, 14, 38, 17. Consider that the read write head is positioned at location 10. Compute for the total head movement for a 100.. | track 39 |
| compute for the total head movement (THM) of the R/W Head 98, 53, 22, 16, 24. Consider that the read write head is positioned at location 32. Compute for the THM for a 100.. Using LOOK (going higher tracks dir), what is the first served track request? | track 53 |
| R/W Head 39, 14, 38, 17. Consider that the read write head is positioned at location 10. Compute for the total head movement for a 100 (0 - 99) track disk for each disk scheduling algorithm. Using SCAN (heading towards 0 point), how many THM? | 49 tracks |
| Head 98, 53, 22, 16, 24. Consider that the read write head is positioned at location 32. Compute for the total head movement for a 100 (0 - 99) track disk for each disk scheduling algorithm. Using LOOK (going lower tracks direction), what is the first.. | 24 tracks |
| R/W Head 39, 14, 38, 17. Consider that the read write head is positioned at location 10. Compute for the total head movement for a 100 (0 - 99) track disk for each disk scheduling algorithm. Using C-LOOK (going lower tracks direction), how many THM? | 48 tracks* (correct answer is 29) |
| virus” is a vulnerability of which configuration? Group of answer choices Single Computer (without E-mail or internet) Laptop with E-mail LAN connected with internet all of these | all of these |
| Which among the given is a vulnerability of a single computer without e-mail or internet? Group of answer choices sniffers Compressed Passwords E-mail FTP | Compressed Passwords (lmao, its misspelled - "compromised") |
| What is the “ease of protection” of a single computer without e-mail or internet? Group of answer choices High medium low none of these | High |
| __________ plays a key role in computer system security. Group of answer choices Driver MS Word Application Software Operating System | Operating System |
| What is the “ease of protection” of a LAN connected without Internet? Group of answer choices none of these High low Medium | Medium |
| “Sniffers” is a vulnerability of a LAN connected (with internet). Group of answer choices True False | True |
| “Resistance to attacks” is the same as _______. Group of answer choices Strategies to identify the attack Strategies for limiting damage Strategies for detecting attacks Strategies for repelling attacks | Strategies for repelling attacks |
| Which of the following example strategies belong to the key property “Adaptation and evolution to reduce effectiveness of future attacks”? authentication intrusion recognition patterns integrity checking system diversification | intrusion recognition patterns |
| ___________ must be on guard to arm their operating systems with all available defense against attack Group of answer choices System Administrators Project Managers System Analyst Programmers | System Administrators |
| Which among the given is a vulnerability of a LAN connected without internet? Group of answer choices Sniffers Email FTP Web Servers | Sniffers |
| Hardware malfunction is an example of: Group of answer choices Intentional Intrusion trap door Denial of service unintentional Intrusion | unintentional Intrusion |
| Spoofing can be applied to emails, phone calls, and websites Group of answer choices True False | True |
| Spear-phishing is variation of phishing In which the phishier sends fake emails to a certain employee of an organization. Group of answer choices True False | True |
| Hoax site is an example of spoofing Group of answer choices True False | True |
| Which of the given is considered as system vulnerabilities Group of answer choices email exchange vulnerable firewalls all of these file downloads | all of these |
| Which of the following is an example of an intentional attack? Group of answer choices Blended Threats Viruses and worms all of these Trojan Horses | all of these |
| Blended threats are considered as intentional attacks. Group of answer choices True False | True |
| Spoofing is the act of disguising a communication from an unknown source as being from a known, trusted source. Group of answer choices True False | True |
| This infects the boot record of a disk, saving a legitimate copy of the master boot record in a different location on the volume. Group of answer choices Master boot record virus Boot sector virus Master record virus File infector virus | Master boot record virus |
| Snoopers are programs that reside on computers attached to the network. Group of answer choices True False | False * (Might be true idk) |
Created by:
nemesis12414