四年級關(guān)愛(ài)他人作文（通用35篇）
PART I: C++
1. static global variable vs normal global variable; static local variable vs normal global variable.
2. how to get current source file's filename and current line number using c++?
3. use variable "a" to represent below contents
1) "a" is a pointer to a integer，int *a;
2) "a" is a pointer to a pointer to an integer. int **a;
3) "a" is an array of 10 integers int a[10];
4) "a" is an array to 10 pointers of integers int *a[10];
5) "a" is a pointer to an array of 10 integers int (*a)[10]
6) "a" is a pointer to a function that takes an integer argument and returns an integer.
int (*a)(int);
7) "a" is a pointer of 10 pointers to functions that takes an integer argument and returns an integer int (*a[10])(int)
4. In c++ class, why does the destructor usually use virtual function? why doesnot use virtual function as constructor?
5. What's the purpose of below function, func(2009)
omitted (count how many 1s in the binary of n)
6. write a recursive function to reverse a one-way linked list and return the head node.
PART II. Verilog
1. Computer architecture. Please draw the 5level pipeline structure of classic MIPS CPU.
2. What's "Gray Code"? Please list the advantage of "Gray code". and implement (in verilog) a 2-bit Gray counter.
3. What's the difference between synchronous fifoand asynchronous fifo? Please list the keys when asynchronous fifo.
4. Use verilog the write a state-machine to cache a sequence of 11001101
5. Use verilog to design a 8-bit comparer (only with atomic operator like "~, &, |, ^ and d=a?b:c)
6. Describe an algorithm (fastest) to find the position of the highest bit 1 in a 16-bit unsigned integer.
PART III.On Linux Design Verification and Computer Graphics
1. Regular expression_r of IP address.
2. Linux command. List 5 history commands entered.
3. Shell programming. Please count the total line number of all the .c, .cpp, .hfiles under directory "mydir"
4. Perl programming. Given arbitrary two strings, str1 and str2, and a file of name fn. write a program to replace all str1 in fn with str2.
5. Design verification. What's the significance of coverage in Design Verification? Please list kinds of coverage and illuminate their function. How to improve coverage ?
6. Computer Graphics. what's the difference between flat shading and gourand shading?
7. Computer Graphics. what's the main advantage to render scene from Vertax and Index?
8. Computer Graphics. Please describe the stages of how to transform a model space vertax?
9. Computer Graphics. What's viewport clipping?
10. Computer Graphics. What's the disadvantage to use Mipmap?
筆試題
1.選擇下面哪一個(gè)是時(shí)序電路。四個(gè)選項分別是ADD XOR Latch D-Flop
2.問(wèn)系統工作的最大時(shí)鐘頻率是否跟Hold time有關(guān)，并說(shuō)明理由
3.畫(huà)出下面兩個(gè)代碼綜合出來(lái)的電路圖，并說(shuō)明原因
a：if(aflag)
begin
opt1 <= a;
opt2 <= b;
end
esle
begin
opt1 <= c;
opt2 <= d;
end
always@(posedge clk)
out_data <= opt1 +opt2;
b: if(aflag)
out_data <= a+b;
else
opt2 <= d;
end
always@(posedge clk)
out_data <= opt1 +opt2;
b: if(aflag)
out_data <= a+b;
else
out_data <= c+d;
4.用圖表說(shuō)明下列腳本命令
a: set_multicycle_path 4 -setup -from dffa/cp -to dffb/d
b: set_multicycle_path 4 -setup -from dffa/cp -to dffb/d
set_multicycle_path 4 -hold -from dffa/cp -to dffb/d
/pic/p>
5. 5分頻，用Verilog HDL/VHDL實(shí)現
6. `timescale 1ns/1ps 與`timescale 1ns/50ps分別代表的意義以及區別
7.分別用shell以及perl(或任一你熟知的腳本語(yǔ)言)將當前目錄下所有".c"文件后綴改成".cc"
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