performance engineering interview questions

Classic Linux kernel interview questions 1) What kernel locks does Linux have? 2) What is the meaning of the user mode and Kernel Mode in Linux? 3) How to Apply for a large kernel memory? 4) What are the main methods for inter-process communication? 5) What are the functions used by the partner system to apply for kernel memory? 6) which of the following functions can I use to apply for kernel memory throu

P G Company's eight typical interview questions (refer to the answer) Please provide concise examples that will help us better understand your capabilities. 1. Describe an instance where you set your sights on a high/demaning goal and saw it through completion. Demnding goal: To design a musical and dramatic show to celebrate the centenrix anniversary of Tianjin University. The person who reach this goal:

. Briefly describe the meaning of the viewThe meaning of a view lies in two ways:1) simplify complex queries. If you need to perform a complex query frequently, you can build a view based on this complex query, and then query this view.2) Restrict data access. A view is essentially a SELECT statement, so when you access the view, you can only access the columns that are involved in the corresponding SELECT statement, and the other columns in the Base table act as security and secrecy.11. What ar

Analysis:Store basic data types1. Create an arr reference in the stack2. Create an int array of length 3 in the heap and initialize it, assigning the default value of 03. Point an ARR reference to an int array4. Re-assign values to each int value in an int arrayStore reference type User1. Create a Userarr reference in the stack2. Create a user array of length 3 in the heap and initialize it, assigning a default value of NULL3. Point the Userarr reference to the user array4. Create a user1,user2

maintainability and non-repetition of wheel-making. For example, all spring templates (JDBC,REST,JPA, and so on) have the following advantages: they are built in a consistent way, so you can skip these general steps to focus on more important business logic. Spring MVC is not necessarily the best web framework. There are other, for example, Struts 2,wicket and JSF. That said, spring can also be well integrated with these frameworks (STRUTS,JSF, etc.). XML files are too bloated, and this

are not placed under the sub-domain name, but placed in a separate primary domain name. There is also a reason that the browser for a domain name will have a limit on the number of requests, this method can be convenient to do CDN.What are the states of the readystate of 23.ajax, and what are the meanings respectively?Ajax readystate A total of 5 states, respectively, 0-4, each of which means that the meaning of each number is 0 is not called the Open method, 1 means that the Send method is not

statement changes, the end value is changed. Now the demand changes: ① Select to use input to simulate select ② Use select on the phone. ③ There will always be inexplicable demands. This is Okay. How do you write the current code? Do you know how to write a few codes ??? So let's look at the implementation of MVC. Ye xiaochai's one-page book is really Let's take a look at this god-like code .... We initially thought that he had these problems: ① Code maintenance is difficult, at least I think