Suppose that we have the following stack, where the red line is the indicator for sp. The stack growsdownwards in main memory, just as it does in a regular RISC-V main memory. Both Wordo andWord1 occupy 1 word each:Word (Word1If we want to store the following contents of the stack: (i) a byte from to, (ii) a half word from t1, (iii)a word from t2, such that the stack becomes the following shown below:WordtoIt1t2So essentially, we are popping Word1 from stack and then pushing t0, t1 and t2 in order.Given the following RISC-V code:1 addi sp, sp,2 sb to,3 sh tl,4 SW t2,O -7,0, 1, 5Please select the proper number sequence to fill in the blanks in lines of code maintaining the correctorder. All the numbers in the options below are in decimalO-3, 0, 1, 5▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬(sp)(sp)(sp)O-3, 6, 4, 0O None of the options

Suppose that we have the following stack, where the red line is the indicator for sp. The stack grows downwards in main memory, just as it does in a regular RISC-V main memory. Both Word0 and Word1 occupy 1 word each: Word0 Word1 If we want to store the following contents of the stack: (i) a byte from to, (ii) a half word from t1, (iii) a word from t2, such that the stack becomes the following shown below: Word to t1 t2 So essentially, we are popping Word1 from stack and then pushing t0, t1 and t2 in order. Given the following RISC-V code: 1 addi sp, sp, 2 sb to, 3 sh tl, 4 sw t2, Please select the proper number sequence to fill in the blanks in lines of code maintaining the correct order. All the numbers in the options below are in decimal O -7,0, 1, 5 O-3, 0, 1, 5 (sp) (sp) (sp) O None of the options O-3, 6, 4, 0

Suppose that we have the following stack, where the red line is the indicator for sp. The stack grows downwards in main memory, just as it does in a regular RISC-V main memory. Both Word0 and Word1 occupy 1 word each: Word0 Word1 If we want to store the following contents of the stack: (i) a byte from to, (ii) a half word from t1, (iii) a word from t2, such that the stack becomes the following shown below: Word to t1 t2 So essentially, we are popping Word1 from stack and then pushing t0, t1 and t2 in order. Given the following RISC-V code: 1 addi sp, sp, 2 sb to, 3 sh tl, 4 sw t2, Please select the proper number sequence to fill in the blanks in lines of code maintaining the correct order. All the numbers in the options below are in decimal O -7,0, 1, 5 O-3, 0, 1, 5 (sp) (sp) (sp) O None of the options O-3, 6, 4, 0

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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stack permutation of the numbers 0, 1, ..., n-1 is a permutation obtained as the sequence of numbers output by a stack after the original numbers have been processed left-to-right through a stack (via legal push and pop operations). For example, 0, 3, 2, 1 is a stack permutation of 0, 1, 2, 3 obtained by the sequence of operations: push, pop, push, push, push, pop, pop, pop. However, the permutation 1, 3, 0, 2 is not a stack permutation of 0, 1, 2, 3 Which of the following sequences are not stack permutations of 0,1,2,3,4,5,6,7,8,9? There could be more than one answer: select all those that you think are correct. There is a penalty for incorrect choices. Group of answer choices 4, 6, 8, 7, 5, 3, 2, 9, 0, 1 4, 3, 2, 1, 0, 9, 8, 7, 6, 5 2, 5, 6, 7, 4, 8, 9, 3, 1, 0 0, 4, 6, 5, 3, 8, 1, 7, 2, 9
Two approaches used to write the specifications for operations between a sender and a receiver object (e.g., Stack) are based on design by contract and defensive design. Using an IDE (e.g., Eclipse) write well-documented code for the Stack class using both approaches (StackDC, StackDD). Assume the Stack stores Integer objects with a maximum size of 5 objects. The Stack must be implemented using a LinkedList from the Java library.
1. Consider the following transition system for a stack: empty partial full Write SMV code to build a model for the given transition system.
Write a program that converts an infix expression into an equivalent postfix expression. The rules to convert an infix expression into an equivalent postfix expression are as follows: Suppose infx represents the infix expression and pfx represents the postfix expression. The rules to convert infx into pfx are as follows: a. Initialize pfx to an empty expression and initialize the stack. b. Get the next symbol, sym, from infx. b.1. If sym is an operand, append sym to pfx. b.2. If symis (, push sym into the stack. b.3. If sym is ), pop and append all the symbols from the stack until the most recent left parenthesis. Pop and discard the left parenthesis. b.4. If sym is an operator: b.4.1. Pop and append all the operators from the stack to pfx that are above the most recent left ( and have precedence greater than or equal to sym. b.4.2. Push sym onto the stack. c. After processing infx, some operators might be left in the stack. Pop and append to pfx everything from the stack. In this…
8.19. The UNIX kernel will dynamically grow a process's stack in virtual memory as needed, but it will never try to shrink it. Consider the case in which a program calls a C subroutine that allocates a local array on the stack that consumes 10 K. The kernel will expand the stack segment to accommodate it. When the subroutine returns, the stack pointer is adjusted and this space could be released by the kernel, but it is not released. Explain why it would be possible to shrink the stack at this point and why the UNIX kernel does not shrink it.
Write an Arm Assembly Program that does the following:•Stores on the stack a list of words of memory where the first element of the list is how manyremaining elements are in the list, and the rest of the elements in the list are initialized tosome random values.– Example:list: 6, -3, 4, 5, 9, 22, 99//stores a list of the 6 elements -3, 4, 5, 9, 22, 99•At the end of the program, register r0 should hold the sum of only the negative values in thearray (nonnegative elements are ignored).•Note that your program must work correctly even if the values stored in the list are changed.
2. For the code below, draw a picture of the program stack when the function partition() is called the 2nd time. # extracted from suquant's reply at # https://stackoverflow.com/questions/18262306/quicksort-with-python def partition(array, begin, end): pivot = begin for i in range(begin+1, end+1): if array[i] <= array[begin]: pivot += 1 array[i], array[pivot] = array[pivot], array[i] array[pivot], array[begin] = array[begin], array[pivot] return pivot def quicksort(array, begin, end): if begin >= end: return pivot = partition(array, begin, end) quicksort(array, begin, pivot-1) quicksort(array, pivot+1, end) # added calling code if __name__ == "__main__": mylist = [8, 2, 17, 4, 12] quicksort(mylist, 0, 4)
The compare and swap() instruction can be used to design lock-free data structures such as stacks, queues, and lists. The program example shown in Figure 6.18 presents a possible solution to a lock-free stack using CAS instructions, where the stack is represented as a linked list of Node elements with the top representing the top of the stack. Is this implementation free from race conditions?
In the study of formal languages state-transition diagrams are often usedto visualize changes in a machine’s configuration as it acts on input. To visualize amachine’s configuration think of its parts: Commonly a finite set of states, a finiteinput alphabet Σ, Perhaps storage devices (a stack, input/output tapes). The states arepictured as named circles sometimes decorated with symbols to denote special states,e.g. start and final states. Changes in configuration are denoted by labeled edges andperhaps changes in storage.1. Describe how edges are labeled and their meaning for finite state machines.2. Describe how edges are labeled and their meaning for pushdown automata.3. Describe how edges are labeled and their meaning for Turing machines.
For this assignment you need to write a parallel program in C++ using OpenMP for vector addition. Assume A, B, C are three vectors of equal length. The program will add the corresponding elements of vectors A and B and will store the sum in the corresponding elements in vector C (in other words C[i] = A[i] + B[i]). Every thread should execute approximately equal number of loop iterations. The only OpenMP directive you are allowed to use is: #pragma omp parallel num_threads(no of threads) The program should take n and the number of threads to use as command line arguments: ./parallel_vector_addition Where n is the length of the vectors and threads is the number of threads to be created. Pseudocode for Assignment mystart = myid*n/p; // starting index for the individual thread myend = mystart+n/p; // ending index for the individual thread for (i = mystart; i < myend; i++) // each thread computes local sum do vector addition // and later all local sums combined. As an input vector A,…
A counter automaton is a pushdown automaton that only uses one stack symbol (in additionto the bottom of the stack marker). This means that the stack acts as a simple counter: the push operationincreases the counter, the pop operation decreases it, and you can check if the counter is currently set to 0by looking for the bottom of the stack. In particular, you can not store a string over an arbitrary alphabeton the stack. For example, the automaton for anbn we have seen in class is a counter automaton.Let L = {w ∈{a, b}∗|w contains the same number of symbols a and b}.(2.a) Build a counter automaton accepting the language L. As in Question 1, describe the algorithmused by your automaton, and draw a transition diagram.(2.b) Write down an accepting computation of your automaton on the string abbbabaa.
Suppose you have a stack with a maximum size of 1000 elements and you want to perform the following operations: Push 500 elements onto the stack. Pop 200 elements from the stack. Push 800 elements onto the stack. Pop all remaining elements from the stack. What is the final size of the stack after performing all these operations?