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Master this set of refined Android advanced interview questions analysis, oppoandroid interview questions
2022-07-07 16:43:00 【InfoQ】
start
Android Develop several parts of the interview
- The touch event must be passed to Activity Then pass it on to View The? ?
- If you want to in Application Of onCreate Execute some logic before the lifecycle , Where can I put it ?
- draw、onDraw、dispatchDraw What is the order of execution ?
- View The real display is in onResume Before or after ?
- Activity There is a nested Fragment,startActivity after ,Activity and Fragment What is the life cycle sequence of ?
Key project experience
- Why do you do this ,
- What factors are considered and how are they done ,
- What effect has been achieved ( For example, the starting speed is from 1000ms drop to 200ms, This specific data )
Beyond technology
My face to face summary
- Android Features of each version ( for example 6.0, Dynamic permissions )
- ANR Why
- Android The way and comparison of inter process communication in
- AsyncTask Implementation principle, advantages and disadvantages of
- Handler Mechanism
- Customize view Trilogy , technological process ( Or the actual scene , For example, implement a dial , How do you do it? )
- FrameWork hierarchy
- Activity Life cycle (A Jump to B,A and B The execution sequence of the life cycle in )
- Dvlik、ART、JVM The difference between the three virtual machines
- Can you be in Africa UI Thread update UI
- Service and IntentService The difference between
- Thread and HandlerThread The difference between
- Touch Event distribution mechanism
- How do you know a Activity Whether there was a leak
- Click on a from APP What happened to the icon
- Activity Start process ( Look at the source code , Just say it roughly )
- Activity Boot mode ( Four kinds of )
- Intent start-up Activity The way
- onStart and onResume The difference between
- LruCache And how it works
- Android Medium MVC、MVP、MVVM The difference and connection
- Parcelable and Serializable The difference between
- Service Life cycle
- Service Startup mode and difference of
- Binder Mechanism
- onSaveInstanceState and onRestoreInstanceState When to call ( You need to understand , There is usually a scene for you to judge )
- onNewIntent When to call ( ditto )
- Android Performance optimization and memory optimization in
- RxJava The way ( Common operators , Back pressure , Thread switching principle , The practical application )
- RxAndroid The way
- EventBus principle
- Volley principle
- OkHttp principle
- Retrofit principle
- RxJava and Retrofit combination
- Dagger2 principle
- Let's introduce componentization ( Why there should be componentization , How to resolve merge conflicts )
- Quickly introduce
- Common methods of screen adaptation
- Service、 Process keeping alive
- Glide principle
- AsyncTask principle
- SurfaceView And the general View The difference between
- Implementation principle of dependency injection framework
- Git project management
- What is L3 cache
- Common design patterns ( Master common about 10 Plant on Ok)
- ThreadLoal Function and principle of
- Implementation mode and principle of thread
- State of thread , How to create threads , Transition between thread states ( For example, when a thread changes from running to blocking )
- State of process
- transient The role of keywords
- sleep() and wait() The difference between
- hashcode() The role of methods
- == and equals() Method difference ( Why rewrite equals() Methods have to be rewritten hashcode Method )
- Java Three characteristics of
- The difference between interface and abstract class
- Difference between process and thread
- Meaning of thread pool parameters , And four common thread pool application scenarios
- Characteristics, principles and application scenarios of blocking queue
- yield() The role of methods
- The type of multithreaded lock ,ReentrantLock,Lock,synchrnoized Keywords, etc
- volatile The role of keywords ( Role in single case )
- The concept of closures
- Generic ( What is type erasure , Why generics )
- Lock optimization method ( spinlocks 、 Adaptive spin 、 Lock elimination 、 Lock coarsening 、 Biased locking )
- Class execution order
- StringBuffer and StringBuilder The difference between
- HashMap Implementation principle of ( It is best to 1.8 Before and 1.8 After that, you should know )
- ConcurrentHashMap Implementation principle of ( Same as 1.8 Know before and after )
- ArrayList and LinkedList The difference between
- Java Memory area ( The difference between heap and stack , What is a runtime constant pool )
- Packing and unpacking
- OOM abnormal
- GC Mechanism (GC Area , How to judge whether an object can be recycled ,GC Algorithm ,GC Strategy )
- Class loading mechanism ( Class loading process parent delegation model )
- Java Memory model ( Main memory and working memory )
- Atomicity (AtomicInteger principle )、 visibility (volatile keyword )、 Orderliness , How to ensure
- Antecedent principle (happens-before principle )
- Thread safe implementation method
- The type of lock ( Pessimistic locking , Optimism lock CAS Algorithm , Fair lock , How to realize unfair lock )
- StringBuffer and StringBuilder difference
- annotation ( Custom annotation )
- The concepts and differences of four kinds of references
- HTTP agreement ( Head structure , Several request methods , Caching mechanisms , The difference between the versions )
- HTTPS agreement , and HTTP The difference between agreements , The process of key agreement ,SSL Mechanism
- Symmetric and asymmetric encryption
- TCP and UDP The difference between
- TCP Three handshakes of 、 Four waves ( Including status code , And why wait after four waves 2*TIME_WAIT)
- TCP congestion control mechanism
- TCP Sliding window mechanism
- TCP Timeout retransmission mechanism
- DNS agreement
- Five layer network model ( The physical layer , Data link layer , The network layer , Transport layer , application layer )
- IP Head
- Enter a web address in the browser address , What happened?
- Linked list ( One way linked list , Double linked list )
- Array ( Rotated array )
- queue ( deque , Blocking queues )
- Stack
- Pile up ( Big root pile 、 Heap )
- Binary tree ( Perfect binary tree 、 Full binary tree 、 Binary sort tree 、 Balanced binary trees , Red and black trees )( Depth traversal , Sequence traversal )
- chart ( Focus on the depth first traversal and breadth first traversal of the graph )
- Seven sorting algorithms ( Bubbling , choice , Insert , Merge sort , Quick sort , Heap sort , Shell Sort )
- The finger of the sword offer Algorithm problem on ( Be able to compare directories , Look at the title , Can have ideas , Just ok)
- Two points search
- Two stacks implement a queue , Two queues implement a stack
- Massive data sorting
- topK problem , Yes 1 Tens of millions , How to quickly find the biggest 100 individual
- Merge two ordered arrays , Merge two ordered lists
- Young's matrix ( Horizontal increment , Increasing vertically ) How to find the specified number in
- Flip a sentence , for example I am 3 years old, After flipping ,old years 3 am I
- Yes 10 Billion data , Now only 200M Memory , How to find this 10 The most frequent of 100 million data 100 Data
Last
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