COP4600 - Quiz Questions

COP4600 - Quiz Questions Is each of the following true of UEFI, BIOS, both, or neither? (UEFI, BIOS, Both, Neither) I. Usable on x86-64 (x64) standalone personal computer systems II. Usable on x86-32 (i386) and all earlier standalone personal computer systems III. Standard for ARM chipset systems IV. Has standardized NVRAM locations for system variables V. Uses a dedicated bootloader partition - ANS I: Both II: BIOS III: Neither IV: UEFI V: UEFI Batch systems had to implement multiprogramming. (True, False) - ANS False I/O-bound jobs underutilize the CPU in uniprogrammed systems. (True, False) - ANS True Memory protection was not needed in uniprogramming batch systems. (True, False) - ANS True A major motivation for multiprogramming batch systems was improving resource utilization. (True, False) - ANS True In "old" batch systems, the user was also the operator. (True, False) - ANS False Parameters passed to a procedure/method are located in the________ segment of a process. 1. heap 2. text 3. stack 4. data - ANS 3. stack Dynamically allocated variables are located in the________ segment of a process. 1. heap 2. text 3. stack 4. data - ANS 1. heap Constants are found in the________ segment of a process. 1. heap 2. text 3. stack 4. data - ANS 4. data Instructions to be executed by a process are located in its ________ segment. 1. heap 2. text 3. stack 4. data - ANS 2. text Which are the conceptual elements of the process model? (Yes, No) I. Independent execution II. Synchronous execution III. Unique program counter IV. Fairness in scheduling - ANS I. Yes II. No III. Yes IV. No Which of the following are true of procedure calls and system calls? Select "True" or "False". I. The system call traps to the operating system, while the procedure call does not. II. The system call stores its parameters in one or more registers. III. The procedure call pushes an activation frame on the stack, while the system call does not. - ANS I. True II. True III. True Which of the following approaches, in the common case, yields the CPU when waiting for a resource to become available? (True, False) I. Semaphores II. Mutexes III. Spin Locks IV. Pipes V. Networking - ANS I. True II. True III. False IV. True V. True Select the locking mechanism that each synchronization method below uses. (Condition Variables, Messaging, Shared Memory) I. Networking II. Monitors III. Pipes IV. Spin Locks V. Semaphores - ANS I. Messaging II. Condition Variables III. Messaging IV. Shared Memory V. Shared Memory Which of the following are true? Select all that apply. 1. A program may have more than one process. 2. A thread may have more than one process. 3. A process may have more than one thread. 4. A process may have more than one program. - ANS 1. A program may have more than one process. 3. A process may have more than one thread. Which of the following describes the Dining Philosophers problem? (True, False) A. It is a variant of the producer-consumer problem B. It is a variant of the bounded-buffer problem C. It can result in starvation if not handled D. It can arise when multiple processes engage in a spin lock on the same process E. It can arise when multiple processes require access to two shared resources at once - ANS A. False B. False C. True D. False E. True Select the problem(s) whose solutions are described (at least in part) by each statement. Solutions to the problem... (Producer-Consumer Problem, Reader-Writers Problem, Both) A. Prevent reading and writing to data to the same place at the same time B. Address writing to multiple entries simultaneously C. Account for multiple threads reading different entries simultaneously D. Account for multiple threads reading the same entry simultaneously E. Address issues in maintaining persistent data - ANS A. Both B. Producer-Consumer Problem C. Both D. Reader-Writers Problem E. Reader-Writers Problem Which of the following describes the Producer-Consumer problem? (True, False) A. It can result in race conditions if not handled B. It is a variant of the bounded-buffer problem C. It can arise when multiple processes act to read and/or write an infinite buffer D. It can arise when multiple processes act to read and/or write a finite buffer - ANS A. True B. True C. False D. True Which of the following are times at which physical addresses might be computed in operating systems discussed in class? (Yes, No) A. Development time B. Compile time C. Link time D. Load time E. Run time F. Hammer time G. Adventure time H. Mail time - ANS A. Yes B. Yes C. Yes D. Yes E. Yes F. No G. No H. No The main benefit of overlay systems is that they allow a process to be larger than the available memory. (True, False) - ANS True Which memory approaches can suffer from external fragmentation? (Yes, No) A. Multiple fixed partitions B. Multiple variable partitions C. Paging systems - ANS A. No B. Yes C. No A file system directory... (Yes, No) A. Is a type of file B. Holds a list of file entries C. Holds pointers to a list of process threads D. Depends on 1.21GW being sent to the flux capacitor - ANS A. Yes B. Yes C. No D. No Which of a following are sometimes held in the File Control Block (FCB) of a file (as discussed in class)? (Yes, No) A. File type B. File path C. File permissions D. File locks E. Image thumbnails - ANS A. Yes B. No C. Yes D. Yes E. No Which of the following describes a direct file system ("hard") link? 1. A file entry pointer that holds the inode (or block location) of a file 2. A file entry that holds the path of a file 3. A link between file systems 4. Hero from Legend of Zelda in aggro mode (this is a joke. Do not select this answer.) - ANS 1. A file entry pointer that holds the inode (or block location) of a file Consider that, in a target file, block number n must be read from storage. Which of the following file system schemes use a chained approach to allocation that requires visiting an entry (in storage or main memory) for every block in the file up to and including block n in order to find that block (i.e., requires O(n) time)? (Yes, No) I. Contiguous II. Linked List III. File Allocation Table IV. Indexed V. Chained Indexed - ANS I. No II. Yes III. Yes IV. No V. No How does a bigger block size impact each of the following file system measures generally (and particularly on an index allocation scheme)? Choose "increase", "decrease", or "no effect". I. Data rate on a spinning disk II. External Fragmentation III. Maximum File Size IV. Storage Utilization Rate V. File System Consistency Rate - ANS I. Increase II. No effect III. Increase IV. Decrease V. No effect The IBM nine-track tapes that became the industry standard for storage for three decades had several sizes, the most common being 2400 feet. The high-density version stored data at 1600 bits/inch/track. If one track was used for parity and the rest for data, how much raw data, in KB, could one of these tapes hold? (Use the metric 1KB = 1000B.) - ANS 46,080 Which of the following is true of programmed I/O? (True, False) I. Can be structured to map device memory into the main memory address space II. Can be structured to map device memory into a separate port address space III. Devices directly access system memory to store or retrieve information IV. Requires the CPU to perform memory computation and data transfers V. Requires a co-processor to perform memory computations and data transfers - ANS I. True II. True III. False IV. True V. False Order the following IO approaches from highest to lowest CPU load. 1. Polling 2. Interrupt 3. DMA - ANS 1. Highest 2. Middle 3. Lowest Which of the following are layers that are part of the IP protocol? (Yes, No) A. Application B. Presentation C. Session D. Transport E. Network - ANS A. Yes B. No C. No D. Yes E. Yes Which of the following is true of the IP protocol? (True, False) A. Began as ISO standard B. Created for ARPAnet internetworking C. Incorporates strict layering system D. Designed based on OSI layering model E. Incrementally implemented in the field - ANS A. False B. True C. False D. False E. True (i can not embed the image) - ANS No Explanation: (i can not embed the image) - ANS B. Yes C. Yes Explanation: Which of the following is the highest ranked school in Florida, 7th in public institutions, and 5th in the nation online overall? 1. Florida State University (Free Shoes University) 2. University of Central Florida (U Can't Finish.. or 3. spell, apparently) 3. Florida Atlantic University (Fear the Burrowing Owls!!!) 4. University of South Florida (wait, is this a real place?) 5. University of Florida (Gator Nation) - ANS 5. University of Florida (Gator Nation) GO GATORSSSS WOOOOOO