basic electrical questions

short-circuit current. It has a well-developed Arc Extinguishing structure and sufficient cut-off capability.5. load switch: the construction of the load switch is similar to that of the classified isolation switch, but a simple arc extinguishing device is installed. It also has an obvious disconnection point, with a certain degree of cut-off capability, can be operated with load, but cannot directly disconnect the short-circuit current, if needed, it depends on the High-Voltage Fuses connected

PHP basic knowledge test questions and analysis, php basic knowledge test questions A total of 40 multiple-choice questions and 10 secondary questions are asked. The exam takes one and a half hours. I. multiple choice

Java basic questions (JVM), java basic questions jvm 1. What is a Java Virtual Machine? Why is Java called a platform-independent programming language "? A Java virtual machine is a virtual machine process that can execute Java bytecode. Java source files are compiled into bytecode files executed by Java virtual machin

integers x, y, Z, please put these three numbers from small to large output. Program Analysis: We try to put the smallest number on the X, first compare x with Y, if x>y the value of x and Y, and then compare X with Z, if x>z the value of X and Z, this will make x the smallest. * @author Tong * */public class Sortthreenum {public static void main (string[] args) {Scanner Scanner = new Scanner (System . in); System.out.println ("Please enter the first integer:"); int x = Scanner.nextint (); Syst

C/C ++ basic pen question 1.1.1 (operator ten questions), 1.1.1 ten questions This article seems to be a problem, which is intended to cause thinking and memories. The topic is an operator. In addition, there is no special logical relationship between these questions. I just asked them when I thought of them, but can y

Java learning path-simple basic interview questions, java path-Questions 1. What are the features of object orientation? A: The object-oriented features mainly include the following: 1) Abstraction: Abstraction refers to the process of summarizing the common features of a class of objects to construct classes, including data abstraction and Behavior Abstraction.

: 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 database access. Th

. NET basic interview questions and. net questions I graduated this year and have some temporary preparations before the interview during my job search this semester. The following answers to the interview questions shared by Lao Zhao refer to the books and video tutorials on hand, as well as the online materials. I ho

java.util.scanner;/* * Title: Decomposition of a positive integer factorization. For example: Enter 90 and print out 90=2*3*3*5. Program Analysis: The decomposition of n factorization, should first find a minimum prime number k, and then the following steps to complete: (1) If the prime number is exactly equal to N, then the decomposition of the factorization process has ended, printing can be. (2) if nOperation Result:2. Procedure 2Package Tong.yue.hong;import java.util.scanner;/** * Title: Us

mode. Binder Communication mode:A, telephone base station: Binder Driveb, the communication record: ServiceManagerHere is an example of a comparative image to illustrate the above communication and telephone base station in the binder communication model of the role: a classmate to call the B classmate, first a reunion to find B classmate's phone number, and ServiceManager driver's role is equivalent to the address book, There are some similar phone numbers on both sides of the communicatio

I recently went online and saw Microsoft recruitment questions and basic questions.I found that my IQ is low. The questions are as follows:Basic Question type (note: this type of question type is relatively simple) 1. It takes an hour to burn an uneven rope from the beginning to the end. Now there are several ropes of the same material. How can I use the burning

' is null,0,count (*)) numberFrom message left JOIN comment on message.id=comment.idGROUP 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 selecting the drop-down menuWrite how to implement this drop-down menufunction CategoryList (){$result =mysql_query ("Se

. ' 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 selecting the drop-down menu Write how to implement

, and the duplicate char is stored in ArrayList. We use the Collections.sort () function to sort the characters in the ArrayList, so the same characters must be contiguous. It then loops through the elements in the TreeSet collection, looking for the first and last occurrence of the element in ArrayList, the number of occurrences = The last occurrence-the number of occurrences of the first occurrence of +1.Second, the source codeProgram 1:Operation Result:Program 2:Operation Result:Program 3: O

word key that needs to be counted, then take advantage of Java's own indexof () Find the first occurrence of the word position,//statistics plus 1, and the previous statistics of the string truncated, in the remaining fields to match. int times = 0;while (true) {int index = Str.indexof (key), if (Index! =-1) {times++;str = str.substring (index + key.length ( ));} Else{return Times;}}}Operation Result:Source Code 3:Package Com.yue.day11;import Java.util.scanner;public class Yanghuitri {/** * Pri

); System.out.println ("Please enter the lower limit of the number:"); int low = Scanner.nextint (); System.out.println ("Please enter a number cap:"); int high = Scanner.nextint (); if (Low>high) {System.out.println ("you entered the wrong data, please re-enter!") "); System.out.println ("Please enter the lower limit of the number:"); low = Scanner.nextint (); System.out.println ("Please enter a number cap:"); high = Scanner.nextint ();} SYSTEM.OUT.PRINTLN (all primes between low+ "-" +high+ ")

) {Integer a = Integer.parseint (num);Long sum = 0;Long subsum = 0;for (int i=1;iSubsum = Subsum*10+a;sum = sum+subsum;}return sum;}}Operation Result:3. Procedure 3Package Tong.yue.hong;Import Java.util.Scanner;/** Title: If a number is exactly equal to the sum of its factors, this number is called the "end number", that is, the non-repetition factor other than itself and equal to itself. Programming to find all the finished numbers within M.* For example 6=1+2+3. The second complete number is 2

hundreds, 10 digits, single digit numbers are 1, 2, 3, 4. But must satisfy each one on the number is different, according to the permutation combination principle altogether has the 4*3*2=24 species. * @author Tong * */public class Pailiezuhe {public static void main (string[] args) {int count = 0;for (int i = 1; I Operation Result:3. Procedure 3Package Tong.yue.hong;import java.util.scanner;/** * The bonus awarded by the Enterprise is based on the profit commission. * Profit (I) less than or e