The 100 questions of the interface test interview, no longer worry about not being able to hang the interviewer

HTTP, HTTPS protocol

What is DNS
HTTP protocol
How to grab HTTPS protocol
Say common return status codes in the request interface
HTTP protocol request method
The difference between HTTP and HTTPS protocol
What is the difference between HTTP and HTTPS implementations?
Difference between POST and GET
HTTP request message and response message format
What is the HTTP protocol stateless protocol? How to solve the HTTP protocol stateless protocol
Common POST submission data methods
HTTP request message and response message format
Which versions of the HTTP protocol have you learned?
Difference between Session and Cookies
Which layer is HTTPS, and which layer is the session layer?
What happened after the browser entered the url and pressed Enter?

TCP, UDP protocol

The difference between TCP/UDP protocol, how to ensure the correctness of TCP, what protocol is WeChat based on, what protocol is QQ based on, and why?
Are you familiar with the OSI protocol? what is the principle

Interface use case design

How to design interface test cases?
HTTPS test point
Change from HTTP to HTTPS protocol, test point
Shopping cart module, add to the shopping cart interface test point analysis
http://…?orderId=,**, interface design use case
When designing an interface test case, it involves an e-commerce system, which includes many modifications, such as commodities, merchants, stores, etc. The modification of these data will involve many parameters. Such as the name of the product, the size of the product, the color of the product, etc. When designing and implementing the "modification" interface, how to determine what parameters to pass? Do I only need to pass the parameters I want to modify, or do I need to pass all the parameters?
Upload file test point
Design test cases according to the following interface
How to measure all the several states of an order, such as: unprocessed, processing, processing failed, processing successful

interface test

Why do interface testing
What bugs have you found during your usual interface testing?
How do you usually test the interface
What tool do you usually use to measure the interface?
There is no interface document, if you do interface testing
Interface testing process
What interface testing tools are commonly used, and an example of how you do interface testing at work?
How to deal with irreversible operations, such as how to test an interface such as deleting an order
How to clean up the garbage data generated by the interface
Where do you put the test data
How did you achieve your digital signature?
When an exception occurs in an interface, how do you analyze the exception
How do you do parameterization
How to perform data cleaning
How to perform data verification
How to verify the response, there are many parameters
How to analyze whether it is a front-end or back-end problem when doing interface testing
How to know whether the request succeeded or failed in the test interface
How to simulate a weak network test
How to test asynchronous interface
What is the difference between symmetric encryption and asymmetric encryption in the encryption test of the interface? How to conduct the test? Please explain
Please elaborate on how interface testing and UI testing work together in testing activities?
At present, the interface documents are managed in word format. Due to the fast iteration, a lot of texts are generated. It is difficult to distinguish which interfaces are unused, which are the interfaces in use, and which are the updated interfaces. The texts are messy. Management, inconvenient to ask, how to manage? Each time you view the interface document, you need to download multiple words, and the download operation cannot be avoided. The efficiency is not high. How to improve work efficiency?

interface dependency

What should I do if many interfaces require login?
How login-dependent interfaces handle -token and session management
In the process of manual interface testing or automated interface testing, how to deal with data dependencies between upstream and downstream interfaces?
How to test interfaces that depend on third-party data
How to test the interface that depends on the login status in the interface test
If the two requests have a strict sequence, you need to test the situation of reversing the order
The next interface request parameter depends on the return data of the previous interface

Web Service

What is the difference between HTTP interface testing and Web Service interface testing?
How the Web Service Interface is Tested

interface framework

How is the interface testing framework built?
Have you done any work related to framework stability optimization?
How does continuous integration work?

Mock

How to use Mock
how do you mock

RPC

How to test the rpc interface
What is an RPC interface, design an RPC interface with Http
Have you implemented the rpc framework yourself?

performance

How does JMeter store variables for the next interface to use
How to perform an interface stress test
JMeter executes 10 times
JMeter gets the result of the previous request
JMeter completes a use case
When doing an interface test, when there are many request parameters, the tps drops significantly. This interface obtains data from redis according to the parameters, and each parameter interacts with redfs once. When one set of parameters is tps5133, and the five sets of parameters are tps1l69, multiple interactions affect the processing performance. Please describe in detail how you can improve your performance enhancement options

high energy part

TCP header format
UDP header format
The difference between TCP/UDP (not only macroscopically, it is best to explain clearly according to their respective mechanisms)
HTTP status codes (best used in combination with scenarios, like which one to use on cache hits)
HTTP protocol (the role of some header fields, such as cace-control, keep-alive)
OSI protocol, TCP/IP protocol and the corresponding protocol for each layer
Session mechanism, Cookie mechanism
TCP handshakes three times and waves four times (this question really has to be answered and vomited, but it is really the interviewer's favorite question. It is recommended to do it once a day, and not only the process of each request, but also various FIN_WAIT and TIME_WAIT states. to master).
The process from opening a web page to page display (covers all aspects, DNS resolution process, Nginx request forwarding, connection establishment and maintenance process, browser content rendering process, the more detailed the better).
The difference between http and https, https is an additional process when requesting, how does https ensure data security
IP address subnetting
Difference between POST and GET
DNS resolution process
How does TCP ensure the reliable transmission of data (this problem can be extended to many sub-problems, congestion control slow start, congestion avoidance, fast retransmission, sliding window protocol, stop-wait protocol, timeout retransmission mechanism, it is best to master)
ARP
Difference Between Switch and Router
HTTP2.0、thrift
The difference between API interface and SDI interface (API is the interface provided to others)
How does dubbo make multiple calls concurrently with one link. The principle of Dubbo, serialization related issues
How do you understand the http protocol
Talk about the workflow of the http protocol
What are the request submission methods for http?
What status do 200, 302, 403, 404, 500, 503 in http represent?
What is web caching? What are the advantages
How do you understand cookies and sessions, and what are the differences?
What is https, talk about how https works
What is an http proxy server and what is it used for
What is a distributed system
What aspects of distributed systems would you consider
Talk about the CAP concept
How to understand strong consistency, monotonic consistency and eventual consistency
What strategies will you consider in distributed system design
Talk about the three-way handshake and four-way wave process of the TCP protocol
Talk about the three-way handshake and four-way wave process of the TCP protocol
Why does TCP establish a connection protocol with a three-way handshake, while closing a connection is a four-way handshake? Why can't you connect with two handshakes
Why does the TCP TIME_WAIT state need to wait 2MSL before returning to the CLOSED state?
What are DoS, DDoS, DRDoS attacks? how to defend
Why is the TCP/IP protocol unreliable?
What are the seven-layer models of OSI? What is the four-layer model of TCP/IP?

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