Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
OS SA3
| Question | Answer |
|---|---|
| _______ was used as an early secondary-storage medium, but the access time is much slower than for disks. | Magnetic Tape |
| Which of the given is considered aspects of disk management for which an operating system is responsible. | All of these |
| The system stores information by recording it ______ on the sector under the read-write head. | magnetically |
| Each disk platter has a flat _______ shape, like a phonograoh record. | Circular |
| 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. | True |
| LOOK disk scheduling algorithm is sometimes called the elevator algorithm | False |
| The Shortest Seek Time First disk scheduling selects the request with the minimum seek time from the current head position. | True |
| In a disk the information is recorded on the __ | Surface |
| It is the time it takes for the sector to rotate under the head. | Latency Time |
| A _______ has a separate read-write head for each track. | Fixed-head system |
| It is a way to read and write data on disks, where the number of bits per track is uniform (constant number of sectors). | Constant Angular Velocity |
| The OS can improve on the average disk service time by scheduling the requests for disk access. | True |
| C-SCAN scheduling essentially treats the disk as though it were circular where the last track is adjacent to the first one. | True |
| The First Come First Served disk scheduling selects the request according to the order in the disk queue | True |
| The Shortest Seek Time First disk scheduling selects the request with the maximum seek time from the current head position. | False |
| A disk normally has a device _______ indicating which files are on the disk. | directory |
| ______ are rigid metal or glass platters covered with magnetic recording material. | Disks |
| A ________ movable-head system has only one read-write head per surface and the system moves the head to access a particular track | Movable-Head system |
| One of the earliest secondary-storage media is the _______. | Magnetic Tape |
| It is a way to read and write data on disks, where the density of bits (bits/unit length) per track is uniform. | Constant Linear Velocity |
| Given the following track requests in the disk queue 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 total head movement for a 100 (0 - 99) track | 156 tracks |
| Which of the configurations is vulnerable to “Sniffers”? | LAN connected with or without Internet |
| A type of virus which is triggered by a specific time | Time Bomb |
| 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 (0 - 9 | 49 tracks |
| It is the time it takes for the sector to rotate under the head. | Latency time |
| Small programs written to alter the way a computer operates, without permission of the user. | Virus |
| Spear-phishing is variation of phishing In which the phishier sends fake emails to a certain employee of an organization. | True |
| A typical hard disk have a rotation speed from __ | 4500 - 7200 |
| An incident where the head contacts the disk surface, the head will scrape the recording medium off the disk. | Head crashes |
| It is the time it takes to actually transfer data between disk and main memory. | Transfer time |
| Modern disks are addressed as large one-dimensional arrays of logical blocks, where the ______ is the smallest unit of transfer. | Logical block |
| In C-SCAN scheduling, when it reaches the other end, it immediately returns to the beginning of the disk without servicing any requests on the return trip. | True |
| The size of a logical block is usually ____ bytes. | 512 |
| “Adaptation and evolution to reduce effectiveness of future attacks” is described as_________. | Strategies for improving system survivability based on knowledge retrieved from attacks. |
| Which of the given is an example strategy of the key property “Recover of essential and full services after attack”? | contingency planning |
| The “Ease of protection” of a LAN connected (with Internet) is “High”. | False |
| The “Ease of protection” of a LAN connected (with internet) is “Medium”. | False |
| Which of the given is not an example of unintentional attack? | all of these |
| Logic Bomb is a destructive program that can be triggered by a keystroke or connection with the Internet | True |
| These refer to entering systems by guessing authentic passwords. | Repeated trials |
| Vishing is similar to smishing except that the victims receive a voice mail telling them to call a phone number or access a website. | True |
| Worm is a program to use to enhance the speed of your computer. | False |
| A type of virus which is triggered by a certain event like keystroke | Logic Bomb |
| LAN connected (without internet) is vulnerable to “spoofing” | True |
| Which of the configurations is vulnerable to “Spoofing”? | LAN connected with or without Internet |
| What is the “Relative risk” of a LAN connected without internet? | Medium |
| Which of the given is an example strategy of the key property “Recognition of attack and damage”? | intrusion detection |
| Windows 10 is an example of hand-held operating system | False |
| Security breach can happen due to uneducated users and unauthorized access to system resources | True |
| Blended threats are considered as intentional attacks. | True |
| Which of these are the key properties of a survivable system? | All of the above |
| Computer “Virus” is a vulnerability of Single Computer (without E-mail or internet) | True |
| The more complex and powerful the ________, the more likely it is to have vulnerabilities to attack. | operating System |
| Which of the following example strategies does not belong to the key property “Recovery of essential and full services after attack”? | Authentication |
| What is the “Relative risk” of a LAN connected with internet? | High |
| Hoax Sites are used when unauthorized users want to disguise themselves as friendly sites. | True |
| Infects data files (such as word processing documents, spreadsheets, etc.) | Marci Virus |
| Spoofing can be applied to emails, phone calls, and websites | True |
| Sniffers are programs that reside on computer attached to the network | True |
| Which among the given is not a vulnerability of a single computer without e-mail or internet? | Sniffers |
| What is the “ease of protection” of a single computer without e-mail or internet? | High |
| Security breach is a gap in system security that can be malicious or not. | True |
| Works by attaching itself to a template (such as NORMAL.DOT), which in turn is attached to word processing documents. | Macro Virus |
| __________ are programs that reside on computers attached to the network. | none of the these |
| Small programs written to alter the way a computer operates, without permission of the user. Group of answer choices anti-virus | Virus |
Created by:
kuromisa