java certification test questions

Online to see 3 good Java Development engineers on the machine pen questions, there is no answer here to write the answer, for everyone reference.1, a program, enter 10 integers, and put in the array, the first descending output all the number, and then statistics and output the number of positive, negative and zero650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/56/CA/wKioL1SOYM3hdwnyAAD5bEx1wM82

Java Face Test-javaweb Chapter seven 61,JDBC the basic steps to access a database.1, load Driver2, get the connection object through the DriverManager object connection3, getting the session through the Connection object4, through the session of data additions and deletions to check, packaging objects5, close the resource 62, tell me the difference between preparedstatement and statement.1, efficiency: pr

Combined with Huawei's machine questions to showObviously want to ask some students in school to do a questionnaire survey, in order to the objectivity of the experiment, he first used a computer to generate N 1 to 1000 random integer (n≤1000), for the repeated numbers, only one, the rest of the same number is removed, the different numbers correspond to different student's number. Then the numbers from small to large sorting, in line with the order t

Development website : UnionPay Payment development PlatformPayment Process :The normal payment process is the same,2 is the payment request that will return the payment result HTML in the browser open back to the user5 is the synchronous payment result write (here is the Click Back Merchant button trigger after payment is completed)6 is the asynchronous payment result write (this is paid automatically after payment is completed)If the payment result is written to an exception, you can proactivel

Did a few years of development, today finally summon up the courage to open the blog park. Usually are looking for all kinds of Daniel, see their share of the blog to solve the bug. From today onwards, I also began to share my way of learning. Also hope that everyone support!Recently received a AXIS2 implementation of the WebService through the. NET docking needs, began to be quite simple thing, after the general reference call, the test does not pass

contents of other threads were printed out, Two questions are explained here:1) The split of the task is the Submit () method (or Execute () method) is done at the beginning of the call, and then not in a particular order to start at the same time, this confirms the previous part of the conclusion, but also because of this, shutdown () and shutdownnow () the execution point if (i== 50) In fact, it is meaningless, because when the i==50 of the newrunn

U.S. Regiment push written programming questions: There are 5 people, number 1,2,3,4,5, referee call to 1, number 1 squat, call to 2, number 2,3 squat, call to 3, number 4,5,1 squat, and so on; First select a person number p, to determine the person in each station squatting, squat output y, not squat output nIdea: use two int type to record the starting and ending numbers of squat, respectively, m,n1. When p>=mp2. After repeated, that is, the station

Java Written test Bank (01 issue) Objective Unknowingly run this public number for some time, I am glad to know so many friends, the follow-up to the Java companion will push some of the network's selected technical articles mainly. At the same time do not regularly collate some of the questions, data structure for ev

calendar;d) gettime in DateFormat ()38. With regard to null and "" It is correct to say () ABDA) null is a constantb) "" is a String objectc) NULL can call methodD) "" Method can be calledThe substring () method in the String class describes the correct () ABA) Gets a portion of the stringb) return a new stringc) return a new string arrayD) This method has no return value40. The following about the code string str = new String ("abc"); The correct description is () BCA) Only one string object w

) Createtempfile ()c) mkdir ()d) mkdirs ()36. About Print flow PrintWriter the right thing to say is () ACDA) The stream operates only for data purposes and does not manipulate the data sourceb) The stream only operates the data source and does not manipulate the data purposec) If automatic refresh is enabled, the stream can automatically refresh when it calls the println () methodD) The stream is a subclass of writer37. The statement about generics is correct () ABCA) generics are a new feature

CCF Test (Java)-the largest rectangle Questions: Question number: 201312-3 Question Name: The largest rectangle Time limit: 1.0s Memory Limit: 256.0MB Problem Description: The problem description puts n adjacent rectangles on the horizontal axis, the width of each rectangle is 1, and

This article mainly for everyone to organize Java common face test questions for your reference, the specific contents are as follows 1. The difference between sleep and wait in Java ① the two methods come from different classes, sleep comes from the thread class, and wait comes from the object class.Sleep is the sta

IP reference, can not be set as the primary node, but voting, generally used to back up data.Delayed: You can specify a time delay to synchronize data from the primary node. Mainly used to back up data, if the real-time synchronization, the accidental deletion of data immediately synchronized to the slave node, recovery and can not recover.non-voting: secondary node without the right to vote, pure backup data node. This entire MongoDB replica set has two qu