攒rp，分享一下个人总结的Yelp HR小问题# JobHunting - 待字闺中
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Yelp这家第一轮HR Screen的时候，HR会问你一些CS方面的基础问题
个人根据自己被问到的经历和玻璃门上的面经总结了一下（实际上没有这么多题不过基
本上都在里面），希望对申请他家的各位有所帮助
1. size of unsigned integer
2. http port no.?
3. ssl full form? (Secure Socket Layer, Encrypt in Transportation layer)
4. use of grep and kill
5. the runtime of adding something to a linked list? O(N)
6. SSL和TLS（Transport Layer Security）的区别：TLS是SSL的升级版（TLS3.0 =
SSL1.0）TLS先handshake再secure
7. hashmaps, DNS(Domain Name System),
8. python native datatypes Boolean, Number, String, Byte, List, Tuple,
Set, Dictionary
9. What does HTML stand for? HyperText Markup Language
10. what is the protocol used underneath FTP, what is the size of int
11. would it generally be better to run a binary search on a <
>, or a linked list
12. immutable python types: int, float, tuple and str
13. Difference between POST and GET:
GET requests a representation of the specified resource.
POST submits data to be processed (e.g., from an HTML form) to the
identified resource.
14. What command would you use to retrieve one row of data from a table
using SQL?
15. What is the best and worst case time complexities for a hash table? O(1)
O(n)
16. What is the maximum value of an unsigned integer? <<2^32 - 1>>
17. What is the command for viewing memory management information in Linux?
vmstat, top
18. What command would you use to retrieve one row of data from a table
using SQL? SELECT ... FROM ... WHERE ... ORDER BY ... FETCH FIRST n ROWS
ONLY
19. Do INNER JOINS produce the intersection or union between two tables? <<
Intersection.>> Outer join is union.
20. Which operation is more expensive? Multiply, <> or Add
21. What is the average disk access time? <
22. what's the difference between hashtable and hashmap? 前者thread safe
23. sed command: <>
24. How to delete in the SQL table? <>
25. What is Big O notation?
26. How does process communicate with each other? <
27. explain with the most detail what happens in the background after a URL
is put in the browser and pressed enter
28. some linux commands: pid <<
29. What's a static variable?
30. Unix command word count: <> Find number of line <>
31. linux command for checking cpu usage <>
32. how many bytes are contained in a 32 bit system <<2^29>>
33. How can you get the ip address of the other machine? <
个人根据自己被问到的经历和玻璃门上的面经总结了一下（实际上没有这么多题不过基
本上都在里面），希望对申请他家的各位有所帮助
1. size of unsigned integer
2. http port no.?
3. ssl full form? (Secure Socket Layer, Encrypt in Transportation layer)
4. use of grep and kill
5. the runtime of adding something to a linked list? O(N)
6. SSL和TLS（Transport Layer Security）的区别：TLS是SSL的升级版（TLS3.0 =
SSL1.0）TLS先handshake再secure
7. hashmaps, DNS(Domain Name System),
8. python native datatypes Boolean, Number, String, Byte, List, Tuple,
Set, Dictionary
9. What does HTML stand for? HyperText Markup Language
10. what is the protocol used underneath FTP, what is the size of int
11. would it generally be better to run a binary search on a <
>, or a linked list
12. immutable python types: int, float, tuple and str
13. Difference between POST and GET:
GET requests a representation of the specified resource.
POST submits data to be processed (e.g., from an HTML form) to the
identified resource.
14. What command would you use to retrieve one row of data from a table
using SQL?
15. What is the best and worst case time complexities for a hash table? O(1)
O(n)
16. What is the maximum value of an unsigned integer? <<2^32 - 1>>
17. What is the command for viewing memory management information in Linux?
vmstat, top
18. What command would you use to retrieve one row of data from a table
using SQL? SELECT ... FROM ... WHERE ... ORDER BY ... FETCH FIRST n ROWS
ONLY
19. Do INNER JOINS produce the intersection or union between two tables? <<
Intersection.>> Outer join is union.
20. Which operation is more expensive? Multiply, <
21. What is the average disk access time? <
22. what's the difference between hashtable and hashmap? 前者thread safe
23. sed command: <
24. How to delete in the SQL table? <
25. What is Big O notation?
26. How does process communicate with each other? <
27. explain with the most detail what happens in the background after a URL
is put in the browser and pressed enter
28. some linux commands: pid <<
29. What's a static variable?
30. Unix command word count: <
31. linux command for checking cpu usage <
32. how many bytes are contained in a 32 bit system <<2^29>>
33. How can you get the ip address of the other machine? <
