plc test questions

Test) 1. Is the layout reasonable? Are two testboxes and one button aligned? 2. length and height of testbox and button combination requirements Performance Test) 1. It takes several seconds to open the login page 2. Enter the correct user name and password, and log on to the new page, no more than 5 seconds Security Test) 1. Check whether the cookie generated

Recently in order to take the exam to crawl online soft exam questions, in the crawl encountered some problems, the following article is mainly about the use of http://www.php.cn/wiki/1514.html "target=" _blank "> Python Crawl The soft exam question of the IP automatic agent of the relevant information, the article is described in very detailed, the need for friends below to see it together. Objective Recently there is a software Professional level

to set a parent object to be equal to one or more of its sub-objects, and the parent object can operate differently depending on the attributes of the child object that is currently assigned to it. It is mainly realized by virtual function. Overriding is a subclass of the practice of redefining a virtual function of a parent class. Overloading refers to allowing multiple functions with the same name, and the parameter tables for those functions are different. Overloading is independent of polym

Int V) { Const Int P; P = V; } Answer: The reference must be initialized during definition. It should be: const Int P = V; 2. programming questions: Flip the linked list. Answer: Typedef struct Node { Int value; Struct node * next; } Slink; Slink * reverselink (slink * H) { Slink * Pre, * cur, * next; Pre = NULL; Cur = h; Next = cur-> next; While (next) { Cur-> next = pre; Pre = cur; Cur = next; Next = Next-> next; } Return cur; } 3. Write outp

Cool News PHP programmer interview questions-test part This article introduces the interview questions for php programmers of Cool News. here, I found the notes and shared them for your reference. Topic recommendation: php interview questions and answers1. there are three php files in the same directory with t

1. Question (1, 12, correct √, incorrect answer) 1. the purpose of software testing is to identify as many Software defects as possible. (Yes) 2. beta testing is a type of acceptance testing. (Error) 3. the acceptance test is implemented by the end user. (Error) 4. The tester does not need to submit any artifacts before project initiation. (Error) 5. About 80% of Software defects can be found in unit tests. (Error) 6. Code review checks whether Sou

I went to a game company for an interview two days ago. The interviewer is the head of the operations department. Because the written test is a mess, it is directly despised. The interviewer didn't bother to say anything. In fact, a lot of written questions are basic types, test center also know, but not good summary preparation. It's out of the hole! Idle is als

A dba questionNote: You can select and answer the following questions based on your own situation. You do not have to answer all the questions. You can also directly contact the interviewer to answer the questions without answering them. I. SQL tuning class1: List several table Connection MethodsHash join/merge join/nest loop (cluster join)/index join2: How to vi

javascript define two-dimensional arrays, and if not, how can you solve them?7. Assuming that a.html and b.html are under the same folder, use JavaScript to automatically jump to b.html after opening a.html five seconds.8. There are two documents A.html and a.php, the code is as follows:A.html A. php $user _name = $_get[' user_name '];$user _tel = $_get[' User_tel '];$user _email = $_get[' User_email '];$user _add = $_get[' User_add '];echo Username: $user _name?> (1) Please draw the a.htm

SELECT message.id id,message.title title,if (message. ' Hits ' is Null,0,message. ' Hits ') Hits,if (comment. ' id ' is null,0,count (*)) number From message left JOIN comment on message.id=comment.id GROUP by message. ' ID ' (3) The above Content management system, table category to save the classification information, the field is as follows (3 points) category_id Int (4) not NULL auto_increment; Categroy_name varchar (+) not null; When a user enters an article, select the article category by

[Training Questions] exam confidence test is the smallest cut, and training exam Question description: There are N people in the test room, A and B. If student I is in Test Room A, the total confidence value increases by xi; If student I is in Test Room B, the total confiden

objects of this class are used in a multithreaded environment, it is best to use StringBuffer. 39. How do I convert a comma-delimited string into an array? Reference: (1) with regular expressions, the code is roughly: ' string[] result = Orgstr.split (","); ' (2) with StringTokenizer, code:StringTokenizer Tokener = StringTokenizer (Orgstr, ",");String[] result = new String[tokener.counttokens ()];int i = 0;while (Tokener.hasnext ()) {result[i++] = Tokener.nexttoken ();}40. 数组有没有length()方法？Strin

Typical cup test questions Test Item: cup Requirement test: view the cup instruction manual Interface Test: view the appearance of the cup Functionality: use water cups for water leakage. Safety: whether the cup contains viruses or bacteria Availability: The damage d

Summary of js pitfalls written test questions (continuously updated) Ask your interviewer down. You are a qualified interviewer. The following are some mistakes-prone js test questions which will be continuously updated. 1. Evaluate the knowledge of this Var length = 10 function fn () {alert (this. length)} var ob

. LOG4J uses the log-level mechanism to write out the log output level in order of output levels from low to high.Answer: log4j is divided into off, FATAL, ERROR, WARN, INFO, DEBUG, all or the level you define. LOG4J recommends using only four levels, with the priority from high to low being ERROR, WARN, INFO, DEBUG. By defining the level here, you can control the switch to the appropriate level of log information in your application. For example, if the info level is defined here, the log infor

Common Android test questions and Answers (detailed collation)1. Please describe the activity life cycle.Answer: as shown in. There are seven periodic functions, in order: OnCreate (), OnStart (), Onrestart (), Onresume (), OnPause (), OnStop (), OnDestroy ().OnCreate (): Called when an activity is created, set in the method, and provides access to any previously stored state in the form of bundles.OnStart

These questions are seen in the German question, it is very interesting, bring to share the trap, see you will not fall into it. First question. Copy Code code as follows: $arr = Array (0=>1, "AA" =>2, 3, 4); foreach ($arr as $key => $val) { Print ($key = = "AA"? 5: $val); } How much is the output result? If the answer is 1534, it falls into the trap. Let's take a look at the structure that the array eventually forms:

Entry questions, the majority of test algorithms, common learning!1. Programmed to count the number of positive numbers, negative numbers, and zeros in the 50 real numbers entered.2. program, calculate and output all the integer solutions of the equation x2+y2=1989.3. Program, enter a 10 binary positive integer, and then output its corresponding octal, hexadecimal number.4. If a number is equal to the sum o

C Language test questions (standard answer)I. Single topic (2 points per quiz, total 20 minor 40 points)1.1-1.5 B D a c b 1.6-1.10 c a D b C1.11-1.15 A D d C b 1.16-1.20 d a b c aTwo. Fill in the blanks (2 points each, total 10 empty 20 minutes)2.1 52.2.2 10; 12; 120.2.3 110.2.4 0x801005; 0x801014.2.5 2; 5.2.6 Automatic.Three. Short answer (4 points per question, total 5 20 points)3.1 Global variables can b

The following two small test questions are collected from the Internet. If you are interested, try them, Do not compile the test results first. Answer the following according to your feelings: 1. There is such a class:Class t{Protected string AAA; Public T (string Val){AAA = val ;} Public String getstring (T){Return T. AAA ;}} And the following usage:1