语言知识点:以java为例
- Java 语言特性:Java 与 c ++ 区别; abstract class vs interface; shallow copy/deep copy; pass by reference/ pass by value; hashcode()/ equals(); Java 一些关键字:final, static; final/finalize/finally; checked/unchecked exception; java 8种primitive type;overriding vs overload;public static void main(string args[])每个关键字的作用
- Java Collections:stack/queue/deque; hashset/treeset; String vs StringBuffer;Hashmap/TreeMap/Hashtable/LinkedHashMap/ ConcurrentHashMap; Array/ArrayList/LinkedList; PriorityQueue(heap); comparable/comparator; iterator
3. 拓展一些问题: Java memory leak/JVM/ garbage collection, Object class method: getclass()/ hashcode(); java: heap/stack存什么; Java 8/Java 7
数据结构和算法
- 二叉树:超级重点: 收集所有二叉树的题
- 链表: 会翻转/快慢指针
- Binary Deduction/Search: sorted/rotated array/ Sqrt()
- 实现基本数据结构: hashmap, stack和queue
- Array/ String: shuffle an array, java big integer实现
- dfs vs bfs word ladder/ topological sorting
计算机网络
1. TCP 三次握手,TCP/UDP 区别;
2. http/https 区别;http request:post/get ;http port 80 ssl;
3.输入www.google.com 会发生什么;What happens when you type [url]www.google.com in your browser?[/url]
4.Public key/Private key;
5. HTTP 401, 403, or 404 Error/ client/server模型
数据库
1. SQL vs NoSql 区别
2. select/update/delete/insert
3.primary key;join(四种)和index 原理和作用
4.简单的sql语句:从table中找出成绩第二好的学生姓名; group by
5.简单了解几种nosql数据库: MangoDB/ Cassandra/HBase
系统及其它
- ACID/CAP 分布式系统
- Java多线程: extend Tread类,Implement Runnable接口/blockingqueue
- 序列化的几种方式:JSON/Object Serialize/ProtoBuf
- what is dead lock?死锁问题/如何解决
- Design Pattern 设计模式(singleton,factory, builder, decorator)
- Linux command: kill -9 / scp / telnet / ps
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