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RSS订阅原创 MySQL - 实验一 - 数据定义
前情提要：WEB设计中接触过数据库，这个学期系统性重新学习，使用语言MySQL。文章目录1. 实验目的2. 实验内容3. 实验步骤(1)创建关系数据库基本表(2)更改表Students(3)删除表/表属性(4)创建/删除索引4. 总结1. 实验目的熟悉SQL的数据定义语言，能够熟练地使用SQL语句来创建和更改基本表，创建和取消索引。2. 实验内容用MySQL创建数据库University_Mis使用CREATE语句创建基本表。更改基本表的定义: 增加列，删除列，修改列的数据类型。.
2021-04-01 15:15:47
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原创 Operating System Concepts Essentials 2nd - Chapter 3 - Exercises
3.1 Using the program shown in Figure 3.30, explain what the output will be at LINE A.#include <sys/types.h>#include <stdio.h>#include <unistd.h>int value = 5;int main(){pid t pid; pid = fork(); if (pid == 0) { /* child proc
2021-04-01 13:45:21
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原创 Operating System Concepts Essentials 2nd - Chapter 1 - Review
1.10 Provide at least two advantages of multiprocessor systems.Faster executionHigher reliabilityCheaper than uniprocessor systems1.13 How does a clustered system differ from a multicore system?1.14 How does multiprogramming increase CPU utilization
2021-04-01 11:34:05
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原创 Operating System Concepts Essentials 2nd - Chapter 2 - Exercises
2.4 What are the three major activities of an operating system with regard to secondary-storage management?Free storage space managementAppropriate storage allocationDisk scheduling2.6 What system calls have to be executed by a command interpreter or
2021-04-01 11:30:28
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原创 Operating System Concepts Essentials 2nd - Chapter 1 - Exercises
Operating System Concepts Essentials 2nd - Chapter 1 - Exercises1.1 What are the three main purposes of an operating system?>Manage and allocate resources needed to solve problems. （Act as a resource allocator)Manage the execution of user programs
2021-04-01 10:58:24
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