•  of the following is(are) true about providing security to database servers ? Select all that apply.
• A、Do not host a database server on the same server as your web server
• B、Do not host a database server on a server based system
• C、Do not use blank password for SA account
• D、Employ a centralized administration model
• 
  
•  table CANNOT have one or more of the following index configurations.
• A、No indexes
• B、A clustered index
• C、clustered index and many non-clustered indexes
• D、Many clustered index
• 
  
•  the following can be referred to as attack method(s)? Select all that apply.
• A、Vulnerability scan
• B、SQL Injection
• C、Drive-by downloading
• D、Brute force
• 
  
•  speed up data access , we build cache system. In one system , The L1 cache access time is 5 ns , the L2 cache access time is 50 ns and the memory access time is 400 ns. The L1 cache miss rate is 50% , the L2 cache miss rate is 10%. The average data access time of this system is:
• A、5
• B、30
• C、45
• D、50
• E、55
• 
  
•  which case(s) would you use an outer join?
• A、The table being joined have NOT NULL columns.
• B、The table being joined have only matched data.
• C、The columns being joined have NULL values.
• D、The table being joined have only unmatched data.
• E、The table being joined have both matched and unmatched data.
• 
  
•  dll is loaded into memory, which part(s) can be shared between processes?
• A、code segment
• B、static variable
• C、global variable
• D、external difinitions and references for linking
• E、BSS segment
• 
  
• In the image below , if the function is designed to multiply two positive numbers which line number in the image contains the biggest functional bug(assume no overflow)?
  
• A、Line 1
• B、Line 2
• C、Line 3
• D、Line 4
• E、Line 5
• 
  
•  statement(s) is(are) correct about thread and process？Select all that apply.
• A、Threads share the same address space of the parent process;Processes share the same address space of the parent process.
• B、Changes to the main thread(cancellation，priority change，etc.) may affect the behavior of the other threads of the process; Changes to the parent process does not affect child processes.
• C、Multiple threads mar cause deadlock,while multiple processes won't cause deadlock.
• D、Threads can directly communicate with other threads of its process; Processes must use inter-process communication to communicate with sibling processes.
• E、None of the above.
• 
  
•  regular expression(s) matches the sentence "www.microsoft.com" ?
• A、^\w+\.\w+\.\w+$
• B、[w]{0,3}.[a-z]*.[a-z]+
• C、.[c-w.]{3,10}[.][c-w.][.][a]|.+
• D、[w][w][w][microsoft]+[com]+
• E、\w*
• 
  
•  of the following method(s) could be used to optimize the speed of a program ?
• A、Improve memory access pattern to decrease cache misses.
• B、Use special instructions(e.g. vector instructions) to replace compiler generated assembly code.
• C、Change an algorithm from recursive implementation to iterative implementation.
• D、Loop unwinding.
• 
  
•  is(are) valid function pointer declaration(s) below ? Select all that apply.
• A、void* f(int);
• B、int (*f)();
• C、void (*f(int , void(*)(int)))(int);
• D、void (*(*f)(int))();
• 
  
•  of the following method(s) CANNOT be used for Text-encryption:
• A、MD5
• B、RSA
• C、RC4
• D、DES
• 
  
•  time complexity of quick sort algorithm is:
• A、O(lgn)
• B、O(n)
• C、O(nlgn)
• D、O(n*n)
• 
  
• As shown in the graph , start from node B , traverse the nodes on a Depth-First Search(DFS) algorithm , which is(are) the possible traversa sequence(s)? Select all that apply.
  
• A、BADECF
• B、BADEFC
• C、BCAFDE
• D、BCFDEA
• E、BFDECA
• 
  
•  assume one type of cancer may be mis-diagnosed in the examination. 5 out of 100 people with this cancer will be diagnosed as not having it , and 1 out of 100 people without this cancer will be diagnosed as having it. We know the chance of getting this cancer is around 0.1%. One person was examined and diagnosed of having this cancer, which of the following value if the closest to the chance of is really having it?
• A、90%
• B、50%
• C、30%
• D、10%
• 
  
•  you have an object to describe customer data:
     {
       ID（7 digit numeric）
       Family Name（string）
       Account Balance（currency）
     }
   this object type , what set of data structures is best to get fast retrieval of customers (1) get IDs from Name and (2) get Name from ID?
• A、(1) Tree with Hash(100 bucket) at leaves(2) Tree with linked list at leaves.
• B、(1) Tree with linked list at leaves(2) Array.
• C、(1) Tree with linked list at leaves(2) Hash(10,000 buckets)
• D、(1) Sort linked list(2) Array.
• 
  
•  many times is f() called when calculating f(10)?
       int f(int x)  
         {
             if(x <= 2)  
                 return 1;  
  1;  
         }
• A、14
• B、18
• C、20
• D、24
• E、None of the above.
• 
  
•  of the follwing sequence(s) could not be a postorder tree walk result of a binary search tree?
• A、1,2,3,4,5
• B、3,5,1,4,2
• C、1,2,5,4,3
• D、5,4,3,2,1
• 
  
• integer i as 0, what's the value of i after the following operation?
     i += i > 0 ? i++ : i –;
• A、-2
• B、-1
• C、0
• D、1
• E、2
• 
  
• statement(s) below regarding TCP(Transmission Control Protocol) is(are) correct? Select all that apply.
• A、TCP provides a way for applications to send encapsulated IP datagrams and send them without having to establish a connection.
• B、TCP supports multicasting.
• C、Port numbers below 1024 are called well-known ports and are reserved for standard services. For example,port 21 is reserved for FTP protocol, and port 25 is for SMTP protocol.
• D、TCP handles package loss reliably.
• E、None of the above.