Small partner at the beginning of the year has been rang this job, but due to the special situation this year, stayed at home for half a year, during this TA did not waste time, absorb the deficiencies before, and strive to study the source code, and the knowledge of the framework…….
In fact, companies of all sizes have interviewed a lot, but they always fail to get a satisfactory offer. Either the package is too low, or the interview is abused.
After the previous several interview failure, finally understand what is called the foundation is not firm, shaking the earth.
The interviewer casually for a knowledge point in-depth investigation, can not answer, so, how can you pass the interview?
However, I have received the good news from my friend recently, and have received the offer from Ali. The company is big enough, but Base is ok, although it is
But there was still a vague sense that he was satisfied.
In fact, I’m still a little confused, why he suddenly got the offer from Ali after his previous foundation was so ordinary.
Then, unable to help himself, he asked him:
“What have you been doing? What did Ali ask you in the interview?”
As a result, this guy this big half a year actually has been in closed cultivation, some basic source code slowly gnawed again.
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Basic HashMap and ConcurrentHashMap
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Thread pool source code implementation
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Block queue BlockingQueue related implementation
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ReentrantLock implementation, and the implementation principle of its internal synchronizer Sync
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The implementation principle of Future
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How does AtomicXXX work
technical
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Monitoring in the project: what are the common monitoring indicators?
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What are the technologies involved in microservices and the issues that need to be addressed?
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What do you know about the registry?
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Are you aware of consul’s reliability?
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Have you gone into detail about Consul’s mechanics? Has it been compared with other registries?
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The project uses Spring a lot. Do you know the principle of Spring? Principles of AOP and IOC
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Besides automatic configuration, what other differences does Spring Boot have compared to traditional Spring?
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What do we know about Spring Cloud?
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The life cycle of Spring beans
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How is HashMap different from hashTable?
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Object hashCode () {equals ();
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Hashmap thread unsafe occurrence scenario
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Online service CPU is very high how to do? What steps can be taken to find the problem
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What thread pools are in the JDK? Thread pools, by the way
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What are the common methods of SQL optimization
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Order of SQL indexes, order of fields
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Is the SQL using an index? (What tools do you have?)
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The difference between TCP and UDP? TCP data transmission process how to achieve reliable?
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Tell me what sort algorithm you know
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Find the median of an array?
After listening to him, I felt that the relevant implementation of the package was systematically organized again.
In addition to JDK source code, but also picked a more interested in their middleware Redis, SQL, in-depth learning.
Hey, for your attitude, I also want to offer you.
However, when it comes to source code, some students seem to be disgusted, always feel that you will write code, why must you go to understand how to achieve the source code?
Several benefits of looking at the source code:
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Learn how to optimize performance, design patterns, etc., from source code
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Go deep into the source code to understand the truth
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Understand the source code, to better solve the problem
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If you know the source code, the interviewer knows you better
How to read the source code, just more efficient?
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Start from the problem, with the problem to see the source
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Debug oriented source code
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Write, write, take notes
Detailed interview questions are available at……
The above interview questions have been compiled into a PDF file, hoping to help you review and find a good job before the interview, and relatively save you time searching for information on the Internet to learn!!
Attached welcome to pay attention to my public variety number: IT resources of the home, scan the following two-dimensional code can receive more first-line large factory Java interview materials!
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