networking interview questions

separately, which belongs to the salvage function operation.Interview question: Please explain the difference between ArrayList and Vector.· These two classes are subclasses of the List interface;· The Vector class is provided at JDK 1.0, and the method of operation provided is synchronous, so it is thread-safeThe Operation class;· The ArrayList class is provided at JDK 1.2, and the method provided is asynchronous, so it belongs to the non-linearProcess-safe Operation classes.If later in develo

when the following statement is executed. Select * from book where book name = 'xxxx' Select * from book where book name = 'xxxx' and press code = 'bb' Select * from book where book name = 'xxxx' and author code = 'ddd' Select * from book where Publishing House code = 'yyy' 9. Write a simple Oracle stored procedure. One output parameter must be a result set. Expert analysis of this exam: First, this examination paper belongs to the basic knowledge class from the examination points of the

Another year of job-hopping season, recently looking for work, interviewing a few companies, summed up the following questions of the interview officer:1. IOC injection and Redis message Queue--no understanding, no answer;2,. NET background async method, not AJAX this, later Baidu, said is with async, also did not know, can refer to Baidu below;3, the difference between EF and ADO, the use of which open sou

ObjectiveRecently saw a group of small partners posted a set of interview questions, and recently job-hopping gold season, small series can not help but take a little time to summarize the next, the answer is not appropriate place to welcome you master Pat Brick pointing. How do I determine if an element exists in selenium? First of all, there is no such method in selenium, judging elements exist to write a

Label:Thanks to our support, we will be able to do so now, and thank you for your support. In this article, we'll focus on the practical skills of MySQL, and talk about questions related to the interview. 1. How do I use the SELECT statement to find the version of the server you are running and print out the name of the current database?A: The result of the following statement shows the version of the serve

example, for ITOA (-123, s []), S = "-123 "; For details, visit: http://www.5qjob.com test questions, part of the questions and exchange groups are as follows: Enterprise question enterprise QQ recruitment group/question exchange group Huawei: 2994922Datang interview questions Datang: 15747626Deloitte -- reason

):Pass #please Implement this20: Describe the use of the range () function under Python?If you need to iterate over a sequence of numbers, you can use the range () function, and the range () function can generate arithmetical progression.As an example:For I in range (5)Print (i)This code will output 0, 1, 2, 3, 45 digitsA range (10) produces 10 values, or you can have range () start with another number, or define a different increment, or even a negative incrementRange (5, 10) five digits from 5

so file not foundNoclassdeffounderror: You can find the right class at compile time, but you can't find the right class at runtime.Iv. outofmemoryerror (Memory overflow)Cause:1, the amount of data loaded in memory is too large, such as the last time to remove too much data from the database.2, the collection class has a reference to the object, after use is not emptied, so that the JVM can not be recycled.3. There are dead loops or loops in the code that produce too many duplicate object entiti

understand the process of solving the problem, and find out what the individual has done, how to do, and what has been harvested. This is the accumulation of experience. The company ultimately needs to contribute to the work of the staff, so the need for experienced people to help solve the problem, then the ability to solve problems and thinking is very important. For students who do not have much experience, such as a new graduate or an intern, then they need a good foundation and some person

by Long LuoPersonal blog LinksRecently in the study Java多线程 , encountered a following pen question, the topic is as follows:编写一个程序，程序会启动4个线程，向4个文件A，B，C，D里写入数据，每个线程只能写一个值。 线程A：只写A 线程B：只写B 线程C：只写C 线程D：只写D 4个文件A，B，C，D。 程序运行起来，4个文件的写入结果如下： A：ABCDABCD... B：BCDABCDA... C：CDABCDAB... Online search, as if still a Google pen questions , the problem involves the knowledge points are:,, 多线程 并发 锁 , 线程间通信 .Personal Analysis Process:1

special place where constants are placed. -Program End Release 5 Code area of the program, storing 2 binary code. The variables defined in the function body are usually on the stack, and the allocated memory functions such as malloc, Calloc, realloc, etc. are allocated on the heap. The global amount is defined in the body of all functions, and after the static modifier is placed in the global zone (static zone), the static variable defined in the body of all functions is valid in the file and c

, not as binary floating-point numbers, so that the decimal precision of those values is saved. One character is used for each digit of the value, the decimal point (if scale>0), and the "-" symbol (for negative values). If scale is 0,decimal and the numeric value does not contain a decimal point or fractional part. Decimal and numeric are worth the largest range as a double, but for a given decimal or numeric column, the actual range can be limited by the precision or scale of the given