java database interview questions

Summary of interview questions and summary of questions 1. Describe the animation mechanism in detail2. Describe the event mechanism3. Description: Measure and Layout. Draw process. When the size of a subclass changesWhat kind of chain reaction will it cause?4. What are the four main components of Android? 4 startup modes of Activity5. Start the Service in two w

: This article mainly introduces the basic questions about PHP interview questions. if you are interested in PHP tutorials, please refer to them. 1. What methods do you use to solve the traffic issue for websites with large traffic volumes? First, check whether the server hardware is sufficient to support the current traffic. Second, optimize

AngularJS interview questions and angularjs questions What are the differences between ng-if and ng-show/hide? The first difference is that ng-if creates this dom node only when the following expression is true. ng-show is created at the initial time and uses display: block and display: none. The second difference is that ng-if will generate a new scope (implicit

optimization strategies Implementation principle of B + tree for MySQL indexing What happens when an index does not hit, causing a full table scan Differences and relationships in the Java bio-NiO AIO Why the bio is blocked NiO is non-blocking NiO is what the model is The overall architecture of Java IO and the design patterns used Reactor model and Proactor model HTTP request message structure and content

operation: Normal mode, edit mode, and command mode.③ keyboard input in normal mode any character is executed as a command, or you can enter a command to move the cursor, character, word, line copy, paste, and delete.④ edit mode is used primarily for text input. In this mode, any characters entered by the user are saved as the contents of the file.⑤ Command mode, the user can do some things such as String lookup, replace, display line number, etc. or must enter the command mode.⑥ enter a colon

During the interview, you are usually asked to fill in two tables. One is your detailed information table, and the other is the answer to the questions.Both of them should pay attention to whether there are content in the anti-positive aspect. If you test your server, there are usually two types, that is Program Connect to the database or some basic Algorithm (Binary Search, recursion, etc.), the company ge

considered as follows:1. During the run of the program, a layout will not change after inflate, unless it is restarted.Because viewstub can only be inflate once and then be empty, you cannot expect to use Viewstub to control the layout later. So when you need to show and hide a layout more than once at run time, Viewstub can't. You can only use the visibility of the view to control it.2. You want to control what is displayed and hidden is a layout file, not a view.Because the ID of a layout fil

Ddchuxing -- Summary of php interview questions and ddchuxingphp questions 1. Differences between echo and print Echo has no return value. print has return value 1. If the execution fails, false is returned. echo outputs faster than print because no return value exists. echo can output one or more strings, print can only output one string. print can be used for c

according to your design to complete the following scenarios. 1. Find five articles closest to the specified article (similarity algorithms are based on the number of identical labels, and the larger the number, the more similar) Integrated Knowledge Section: 1. Talk about your understanding of cookies and sessions, what their application scenarios are, and how they might be able to explain how the session can be shared under a variety of applications. 2. Talk about your understanding of single

(reprinted and collated from the concurrent programming network, slightly modified to organize, more to explore and share, learn together, we are willing to become an offer harvester!) ）Multithreading and concurrency issues are among the questions that interviewers prefer to ask in a Java technology interview. Here, the inter