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Examen
CMSC421: Midterm 1(All accurately solved)
T/F: "A* tree search is not complete if some step costs are equal to zero." correct answers False. If we have finite number of states and avoid cycles/loops, it will be complete. (Me: OHHH I think that it will complete, but it might not be Optimal bc we haven't said anything about whether the heuristic is admissible) T/F: Uniform cost search is complete even if some step costs are equal to zero. correct answers True, assuming we have finite number of states and avoid cycles/loops. A*...
Insightfulsh3rry
Examen
CMSC 421 Exam 1(Correctly solved)
What is the name of our instructor? correct answers Gerald Tompkins What is the email of our instructor? correct answers What does the fork system call do? correct answers The operating system will create a new process that contains the same code/data as the parent process. The state is copied, including open files, register state and all memory allocations, which include the program code. Has a new program ID What does the exec system call do? correct answers Used when the process ...
Insightfulsh3rry
Examen
Final Exam CMSC 421(All solved)
What is a system call? correct answers Programming interface to the services provided by the OS kernel. request to the operating system to allow user to wait for I/O completion What is a kernel module? correct answers a piece of code that can be added to the kernel at runtime to extend its functionality. What is the /dev file system correct answers Where the device driver files are held. In project 3 our kernel module was . We accessed the file by saying /dev/chess What is the differen...
Insightfulsh3rry
Examen
CMSC 421 - Exam 1(100% correct answers)
Professors Name and Email correct answers Lawrence Sebald TA's Names and Emails correct answers Vedmurtty Chavan Naveen Bansal Operating System correct answers A program that acts as an intermediary between the user of a computer and the computer hardware -Execute user programs and make solving user problems easier -Make the computer system convenient to user -Use the computer hardware in an efficient manner Resource Allocator correct answers Manages Resources -Decides...
Insightfulsh3rry
Examen
CMSC 421 Exam 1(Complete solutions)
difference between protection and security correct answers Protection keeps the system from killing itself. Security keeps other things from killing the system what two things does the OS do correct answers resource allocator (manages resources) and a control program (handles errors) what is the kernal correct answers The operating system component running on the computer at all times after system boot. what are the two types of programs correct answers system programs, which are associ...
Insightfulsh3rry
Examen
CMSC 421 MIDTERM(100% Verified)
Girl TA correct answers Aishwarya sapkale - Teacher correct answers Gerald Tompkins - How might starvation and deadlock happen to processes running in a computer? correct answers Starvation and deadlock can occur in case where something is locked due to another process accessing it and never exiting it such as the Reader's and Writer's problem What is the difference between a named pipe and ordinary pipe? (Other than one has a name and the other does not.) How and why are they used?...
Insightfulsh3rry
Examen
CMSC 421: Exam 4 (A+ Guaranteed)
Virtual memory correct answers a collection of one or more logical address spaces, each of which may exceed the size of physical memory Logical address correct answers referred to as virtual address Demand paging correct answers principle of loading a page into memory only when the page is needed, rather than at the start of the execution Present bit correct answers binary flag in each page table entry that indicates whether the corresponding page is currently resident in memory If a...
SirAnton
Examen
CMSC 421 Midterm 2023-2024 (with Complete Solutions)
What does time sharing mean? correct answers Time sharing is a logical extension of multiprogramming in which the CPU executes multiple jobs by switching among them so fast that the user can still interact with each program while it's running. Requires an interactive computer system which provides direct communication between the user and the system. Storage device hierarchy? Which is faster? correct answers Top to bottom: registers cache main Memory nonvolatile memory hard-dis...
SirAnton
Examen
CMSC 421 final (All Solved 100%)
Golgi & Cajal correct answers discovery of neurons McCulloch and Pitts correct answers abstract model of neural processing Hebb correct answers theory of neural learning Hodgkin and Huxley correct answers mathematical model of neural signals Hubel and Wiesel correct answers visual systems Turing (1950) correct answers computing and intelligence Dartmouth Conference (1956) correct answers AI becomes recognized McCarthy (1959) correct answers programs with common sense Know...
SirAnton
Examen
CMSC 421 Exam 2 (100% Correct)
First-Come, First-Served Scheduling correct answers Processes are executed in order received. Convoy Effect - problem where long processes make shorter, potentially more important processes, wait. Shortest Job First Scheduling correct answers Schedule processes/jobs with shortest burst time first. Priority Scheduling correct answers Assign every process a priority Starvation is a risk - low priority processes may never execute. Use aging - increase priority of a process over time...
SirAnton
Examen
CMSC 421 - Exam 1 (Graded A+)
Operating System correct answers A program that acts as an intermediary between the user of a computer and the computer hardware -Execute user programs and make solving user problems easier -Make the computer system convenient to user -Use the computer hardware in an efficient manner Resource Allocator correct answers Manages Resources -Decides between conflicting requests Control Program correct answers Controls what programs run and when they run Atomic correct answers Not int...
SirAnton
Examen
CMSC 421 Exam 1 (All Accurately Solved)
difference between protection and security correct answers Protection keeps the system from killing itself. Security keeps other things from killing the system what two things does the OS do correct answers resource allocator (manages resources) and a control program (handles errors) what is the kernal correct answers The operating system component running on the computer at all times after system boot. what are the two types of programs correct answers system programs, which are associ...
SirAnton