CSCE 3600

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) What is a process? The active implementation of an otherwise passive program. Within the process context (also known as user context), there are four components: Text, data, stack, heap. Within the register context, the components are: General purpose registers, stack pointer, program counter, etc.. PID 0 Swapper/sched, used for memory management. PID 1 Init, continually running in the background and used to start...

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) What is the function of a linker? (general) Combines previous compiled and assembled object code along with standard library functions to make an executable file What does a linker do with external references in object files? (input/output) Resolves references in each object file to external variables and procedures declared in other files What is the role of loaders in programming? (Loaders) Loaders ensure that objec...

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) File Viewing Command: tail print the last n lines of a file File Viewing Command: diff compare files line-by-line Time Related Command: date print date and time in various formats Time Related Command: cal print calendar for month and year Disk Related Command: df print file system disk space usage Disk Related Command: du estimate file space usage for directory and all subdirectories Miscellaneous Command: cle...

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) applications interact with the kernel through system calls true the dual mode operations of an operating system are the ______________ mode and the ____________ mode user; kernel logical OS structure refer to ppt Linux is a ___________ and ___________ operating system. multiuser; multitasking linux allows users to run ________________, manage ________________, and _______________ with other systems applications; r...

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) lexeme The sequence characters matching a pattern tokens In lexical analysis, the compiler scans the source code from left‐to‐right, character‐by‐character, and groups these characters into lexemes, and outputs a sequence of ______ to the syntax analyzer keywords lexeme: if, while, ... operators lexeme: <=, ||, *, +, ... identifiers lexeme: i, i1, j1, sum... numbers lexeme constants: 12, 3.14... (a|b...

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) Compaction -Reduce external fragmentation -Shuffle memory contents to place all free memory together in one large block Best Fit -Keep linked list of free blocks -Search he whole list on each allocation -Choose block that comes closest to matching the needs of allocation -Save excess for later -Merge adjacent free blocks during release operation First Fit -Keep linked list of free blocks -Scan the list for the f...

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) Global Transformation Applied over large segments like loops or functions, requires more analysis. Compile Time Evaluation (constant folding) 3 + 8 turns into 11 Dead code elimination comments and other things that aren't used go away Elimination of common sub-expressions if something is used a lot, then make a variable that is equal to that math, and use that instead of the big one. Frequency reduction move so...

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) CPU Utilization percentage of time the CPU is actively being used -maximize utilization -maximized by multi programming (when one program has to wait, another one takes over) Throughput # of job completions (processes) per unit of time -maximize throughput Turnaround time amount of time to execute a process (completion time - arrival) Waiting time (Queuing time) amount of time process spent waiting in the ...

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) Virtual Memory Technique that allows execution of a program that may not completely reside in memory (RAM). Removes burden of memory resource management from the programmer. OS Controller (with architecture help) Program Controlled Memory Management OS Controlled Memory Management Demand Paging Bringing a page into memory only when it is needed. Less I/O and memory needed, faster response, more users. Page Fault an ...

CSCE 3600 EXAM QUESTIONS AND ANSWERS LATEST UPDATE (ALREADY GRADED A+) Randomly How does the CPU scheduled return parent and child values? exit Function to terminate process Orphan A child whose parent is terminated Zombie A child whose terminated, but whose parent is not waiting False True or false: If you change child data, it will change the parent data Posix thread Most commonly used threads in unix Muted locks, condition variables, semaphores List all 3 ways to synchronize t...