property or member variable in a block that needs to reference an external controller, be sure to use weak references, especially member variables like _testid, where many people do not use weak references and cause memory to be freed.For objects that are normally created, because they are now arc projects, remember that the golden rule of memory management can be solved.18, which third-party libraries have been used?If you've ever developed an app and answered that you haven't used a third-par
The following are the original C ++ engineer recruitment questions of our company. The questions are difficult and there are no strange questions. If you get a correct 60 or more, congratulations! You are a qualified network development
JAVA engineer interview questionsZookeeper
I went to a company for an interview today. I felt dizzy with my brains. I didn't make a few algorithm questions. The questions were relatively simple. I should have prepared myself, but the status was not good, after the
picture suffix 2, how to suffix is tampered with, then each file has a magic digital file upload-magic number5, the principle and implementation of Message Queuing Answer: 1, Message Queuing Principle 2, comprehensible message queue ActiveMQVi. Database Aspects1. The MySQL query field area is not case-sensitive?Answer: Do not differentiate, even if the value is not differentiated (I asked at the time, the area of the application of the size of the meaning of what, the interviewer did not say)2,
Sian O M engineer interview questions
1. What are the functions of the following Linux commands?
Chkconfig -- level 3 sendmail on
Tar-czvf test.tar.gz ./
Chown-R www: www/usr/local/apache/htdocs/
[-D/data1/logs] mv/data1/logs/data1/logs. old
Rsync 192.168.0.200: software.tar.gz.
Rpm-ivh sina. rpm
The job interview is the Java background development, the face of the company is not many, mainly the United States group Reviews-NetEase-NetEase Youdao-Ctrip-Huawei-ZTE-HKUST News-Beacon Communications these companies. In the past, the simple record of their own interview when the problems encountered, as well as the interview gave a little bit of advice to the
Find an internship to find the heart tired, so in the school BBS found a Sina's scattered strokes.First do a pen test, the title is as follows.1. List the UNIX signals you know and explain their use2, give you an IP address, write its unsigned 32-bit representation3, give you some HTTP stuff post request, data, Cookie,url, write an HTTP header.4. Briefly describe some shell commandsTop/mv/find/sar/touch/wc/chmod/df/strace5, write a program in PHP, print out this month's calendar6, simple SQL que
integer.In other words, a mutex can only be used for mutually exclusive access to a resource, and it cannot implement multi-threaded mutex issues for multiple resources.The semaphore can realize multi-thread mutual exclusion and synchronization of multiple homogeneous resources.When the semaphore is a single-valued semaphore, it is also possible to complete mutually exclusive access to a resource.3. The lock and unlock of the mutex must be used by the same thread, the semaphore can be freed by
Interviewer: A girl in her twenties, less than 30
A. come up with a good question, let the cool milk in the cool leader and the cool milk in the cool leader's leeching sheath be excited? 0 minutes.
For example, the "aabbcddef" character string must be output"
I started to understand the question wrong. The program I wrote was wrong. I wrote it again after prompted. :
 One of the interview questions for C/C ++, a Linux Application Development Engineer: synchronization of multi-threaded programs in Linux
Reference: three methods for Linux Thread Synchronization
In Linux, the most common three methods of thread synchronization are mutex lock, condition variable,
Regular Interview Questions and answers by a ribaba Java engineer, Baba java
1. Implementation of Spring AOP and IOC
2. Distributed message queue and distributed cache
Message Queue: RabbitMQ, Kafka
What is the hidden content of this post after a PHP programmer's classic interview and a written examination question? 201712195421.rar (41.35KB, Downloads: 1) 2010-10-1322: 37 uploads and downloads: 1 Original Post address: http://phpjava.org/thread-25-1-1.htmlthis article comes from the PHP programmer's classical interview Analysis of written examination questions
What is the hidden content of this post after a PHP programmer's classic interview and a written examination question? 201712195421.rar (41.35KB, download times: 1) 2010-10-1322: 37 Upload download times: 1 Original Post address: phpjava.orgthread-25-1-1.html this article from: PJDN -- php amp; java Forum | technical exchange community PHP programmer Classic Interview Analysis of written test
Embedded linux engineers interview questions C language basics-general Linux technology-Linux programming and kernel information, the following is a detailed description. I saw an embedded interview on the Internet and suddenly felt very small ...... In the future, I will post my answers one after another. Of course, some of my answers may not be accurate, and th
What is the hidden content of this post after a PHP programmer's classic interview and a written examination question? 201712195421.rar (41.35KB, download times: 1) 2010-10-1322: 37 Upload download times: 1 Original Post address: phpjava.orgthread-25-1-1.html this article from: PJDN -- php amp; java Forum | analysis of classic interview and written examination question
This is an interview question for someone in early October. After-sales position: Senior Network Engineer. The interviewer is a three-member CCIE. The interview lasted more than two hours, and he was very impressed. Now this offer is basically determined, and the subject is still considering situations such as treatmen
the HR, is a beauty! , I was really asked the sweating like Ah! Multiple speechless! I can only giggle at the time!Why come to Shanghai? You basically jump once a year slot, say the first 2 times why you job-hopping? Why don't you want to stay in the company? You've only been here for a few months! And why Choose PPS? What is your most important thing about business?Just interview you is our Technical manager, said you are good, is the salary open hi
Computer Network interview questions, computer network questions
1,OSI Layer-7 protocol,Layer-4 TCP/IP protocol,Five-Layer Protocol mentioned in instructor Xie xiiren's online textbookComparison
(1) OSI's layer-7 protocol is only a theoretical protocol, which is not a
Same Network. net interview questions, Cheng net. net interview
(Basic questions for recent graduates)
1. Differences between session and cookie: how to set the location where session and cookie are stored, and how different domains share the relationship between cookie. ses
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