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Linux Interview Quiz Training

1. query t.txt inside the line number of empty line, AAA ... As the first line650) this.width=650; "Src=" https://s5.51cto.com/wyfs02/M01/8C/DF/wKiom1h8Q4Sy-0TZAABAIT_jujQ926.jpg-wh_500x0-wm_ 3-wmp_4-s_2437759035.jpg "title=" 01.jpg "alt=" Wkiom1h8q4sy-0tzaabait_jujq926.jpg-wh_50 "/>[Email protected] ~]# grep-n ^$ t.txt3:5:[[email protected] ~]# grep-n ^$ t.txt |awk ' BEGIN {fs= ': '} {print '} '352. query t.txt line ending with ABCgrep "abc$" t.txt650) this.width=650; "Src=" https://s2.51cto.co

The second part of the "Linux Discovery Tour" quiz

is the command prefix that does not require login (toggle) to run the command as root, which can be root?A. sudoB. BerootC. NowD. Impossible I forgot how to use the mkdir command, what should I do?A. In the Linux forum shouted, "Come on, do me a favor."B. Man mkdirC. Help mkdir Which of the following commands cannot be used to find files?A. LocateB. HelpC. Find Answer C C A A C B A A B B Part Three first lesson previewToday's class will come here, toget

Linux Interview Quiz 9

technology operation characteristics: Multi-channel, macro-parallel, micro-serial. Concurrency: In the operating system, there are several programs in a period of time that are running from the start to completion, and the programs are running on the same processor, but only one program is running on the processor at any one time point. Throughput: throughput refers to the number of successful data transfers (measured in bits, bytes, packets, and so on) over a network, device, port, virtual cir

Linux Interview Quiz 8

1. Write a script to find the last created time is three days ago, the suffix is *.log file and deleted.Answer:Find dir/-mtime +3-type f-name ". *.log"-exec rm-rf {} \;2. Write a script to move files larger than 100k in a directory to/TMP.Answer:Find dir/-type f-size +100k-exec MV {}/tmp \;3. Write a script to back up and package the database to the remote server 192.168.1.1/backup directoryAnswer:#!/bin/bash/usr/local/mysql/bin/mysqldump-uroot--default-character-set=utf8-p ' * * * * database >/

Java String Ten Quiz backup

as follows:? 1 str.substring (M, N) + ""This creates an entirely new array of characters representing the new string. The method above sometimes makes the code faster because the garbage collector reclaims large unused strings, leaving only one substring.In Oracle JDK 7, SUBSTRING () creates a new character array without an existing array. The substring () Method in JDK 6 and JDK 7 shows the difference between JDK 6 and JDK 7 substring ().String vs StringBuilder vs StringBufferString vs Stringb

Java Multithreading and Concurrency Basics interview quiz "Go"

through the collection using Iterators, the next () method of the iterator throws a Concurrentmodificationexception exception.Concurrent containers support concurrent traversal and concurrent updates.The main classes are Concurrenthashmap, copyonwritearraylist and Copyonwritearrayset, read this article to learn how to avoid concurrentmodificationexception.8. What is the Executors class?Executors provides some tool methods for the Executor,executorservice,scheduledexecutorservice,threadfactory a

Six-way JavaScript quiz questions

}6 return self (n-1) +self (n-2); 7 }8 Console.log (Fibo (6));5, to achieve the following syntax functions: var a = (5). Plus (3). Minus (6); 21number.prototype.plus=function(a) {2 return This. ValueOf () +A;3 };4number.prototype.minus=function(a) {5 return This. ValueOf ()-A;6 };7 varA = (5). Plus (3). Minus (6);8Console.log (a);6, to achieve the following syntax function: var a = Add (2) (3) (4); 9The answer comes from the Gaubee in-depth understanding of the JavaScript s

Python3 Basic Knowledge Quiz

actual correct information; otherwise continue to generate random verification code continue to wait for user inputExample of generating a random CAPTCHA code:For:Def check_code (): import random Checkcode = "For me in Range" (4): Current = Random.randrange (0,4) If current! = I: temp = Chr (Random.randint (65,90)) else: temp = random.randint (0,9) Checkcode + = str ( Temp) return checkcodewhile True: code = check_code () print

"Brush Quiz" with an array of analog Joseph ring

) The variable i indicates which person is reported by the report, each continued to count should be 8 after the touch plus 1, that is, i=i%8+1; 3) in the process of making a count, to skip the already out of the person, the implementation of the array value is set to its subscript, each row out of a position, the position of the element will be changed to 0, if a position corresponding to the array element value is 0, the change position is skipped. The position where the arr

SEO quiz: For Baidu search on-line Aurora algorithm, how should we respond?

Q: For Baidu search on-line Aurora algorithm, how should we respond?Ze Industry construction Station NET Webmaster Yang Zeyi Answer: Baidu on May 30, 2018 on-line the Aurora algorithm, aimed at advocating The resource side attaches importance to the website landing page time specification . The time factor of landing page is the important reference for Baidu to search and judge the website to collect, display and sort the result. In order to provide users with a more satisfying search experienc

Java Multithreading and Concurrency Basics interview Quiz (reprint)

Concurrentmodificationexception exception.Concurrent containers support concurrent traversal and concurrent updates.The main classes are Concurrenthashmap, copyonwritearraylist and Copyonwritearrayset, read this article to learn how to avoid concurrentmodificationexception.8. What is the Executors class?Executors provides some tool methods for the Executor,executorservice,scheduledexecutorservice,threadfactory and callable classes.Executors can be used for convenient creation of thread pools9.

How do I set a graded title for a topic in Word Quiz?

How do I set a graded title for a topic in Word Quiz? In the paper, the general is divided into several major questions, each one will have some small problems. In this case the headline is generally below bold, the small title will be empty two lattice (empty out the big question of the title and punctuation part), the content of the small problem will be indented. As pictured. For this format, I usually handle it in a paragraph. 1, set

First time Java Quiz

");System.out.println (m2.blood+ "" +m2.fire+ "" +m2.defend ");}Correct result:1100 15 102250 85 32350 100 420 0 0// Here are the official answers . Public class Hello { Public Static class moba{Private int blood=100;Private int fire=15;Private int defend=10;Private Static int sum= 0; Public void eat () {blood+=50;} Public void Sport () {fire+=10;} Public void sleep () {defend+=2;}Moba () {sum+ +;} Public Static int getsum () {return sum;} Public Static void defeat (Moba A,moba b) {A.blood+=b.b

C Language Quiz 1

There is a special set of sequence A1,a2,..., which is defined as follows: a1=1,a2=2,..., A (n) =2*a (n-1) +a (n-2). The value of the number of items in the K.Requirements: The first line is the number of groups of test data followed by n-line input, each group of test data accounted for 1 rows, including a positive integer k (1#include C Language Quiz 1

"Swoole" php5.6 Swoole (Demo) Quiz

Swoole:See the explanation on the Internet"Implementing the real-time asynchronous task queue;PHP's asynchronous, parallel, high-performance network communication engine, written in pure C, provides the PHP language for asynchronous multithreaded servers, asynchronous TCP/UDP network clients, asynchronous MySQL, asynchronous Redis, database connection pooling, Asynctask, Message Queuing, millisecond timers, Asynchronous file read-write, asynchronous DNS query. Swoole built-in Http/websocket serv

Another JavaScript quiz (code set) _javascript tips

You can measure how much you know about this knowledge. In the title after I refer to the original Bo main article and comment on the topic analysis, we compete to shoot bricks. The quiz: 1: 1 3 2: 1 "Foo" | | 0 3: 1 | | "Foo" 0 4: (1,2,3) 5: x = {Shift:[].shift}; X.shift (); 3:x.length; 6: {Foo:1} [0] 7: [True, False] [+true, +false] 8: + + '. Split (') [0] 9: A:B: c:d: e:f: G:1, 2, 3, 4, 5; 10: {a:1, b:2} [["B"]] 1 "B" + 45 12: {A:{b:2}} 13: (f

Why does Google have to do the quiz?

has entered China in the hope of focusing on its core business search, but in order to broaden its scope, Google has chosen to work with its heterogeneous partners, which are leaders in the industry; second, Google's communication with Tianya is based on a starting point, that is people-oriented, user-centered philosophy.He said that Google's cooperation with the Tianya is also closely related to Google's future search direction, Google in Chinese web search is very confident, but the network h

Analysis of Php,mysql Quiz exercises

(c) cA: $attr represents an array, then the length of the array can be obtained by $attr.length with CountThe B:unset () method cannot delete an element inside an arrayThe c:php array can store the characteristics of any type of data weakly typed language.d:php only indexed arrays39. The following statement is incorrect (B)A: The keyword used by fuzzy queries is likeB: Sort query asc is descending, desc is ascending ase is ascending; DESC is descendingC: The keyword used for paging queries is l

Linux Exercises-3 file and disk Quiz

fragmented log small files that are not cleaned up, it may occur7 , brief RAID0 , RAID1 , RAID5 working principle and characteristics of three kinds of working modes1, RAID0Split data sequentially in bits or bytes, parallel read/write on multiple disks, high data transfer rate, but no redundancy2, RAID1data redundancy is achieved through disk data mirroring, resulting in mutually backed-up data on paired independent disks. Provides high data security and availability, but disk space utilization

(to) Linux actual combat quiz: create users and passwords in bulk-see if you can?

; Echo stu{11..12}: ' Cat/dev/urandom|tr-dc 0-9|fold-w8|head-1 ' |xargs-n1|tee-a pass. txt|chpasswdMethod 3: Gorgeous from D-toneThere is a wrong argument, cut should take the second field should be-f2 the result should be: Echo stu{21..30} | Tr ' \ n ' | Sed-e ' S/^/useradd/'-E ' s/\ (stu[0-9]\{2\}\) $/\1 \\ echo "\ 1: ' Echo $[$RANDOM **3] | Cut-c1-8 ' "| Tee-a UserInfo.txt | Cut-d:-f2 | passwd--stdin \1/' | BashFunction: Create 10 users is stu21-stu30 its password is random number variables r

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