1. INTRODUCTION TO COMPUTERS
3rd exam solution

2. Question 1
Assuming that a string is stored as a sequence of ASCII codes corresponding to its individual characters, what string would be represented by the following bit pattern:
Note that even-parity check is adopted for each character.

3. Solution of Q1 Ans: Oopstw 11001111 →O 01101111 → o 11110000 → p

4. Question 2
Assuming that a string is stored as a sequence of ASCII codes corresponding to its individual characters, and that odd-parity check is adopted for each character. How would the following string:
I_love_NSYSU_#1?
be represented?

5. Solution of Q2 Ans: I_love_NSYSU_#1?
I→ e→ S→ ?→
_→ _→ U→
l→ N→ _→
o→ S→ #→
v→ Y→ →

6. Question 3
The decimal value 105 is represented by the binary number Please store this number in 64 bits using the IEEE double- precision floating point format.

7. Solution of Q3
Ans:
0, ,

8. Question 4
Suppose the following 64 bits represent a number in the IEEE double-precision floating point format:
What is the decimal value corresponding to the above bit sequence?

9. Solution of Q4 Ans: 100000000102=102610 =(-1)X (2) 1026−1023 X(1.11)2
=(-1110)2
=(-14)10

10. Question 5 Suppose outputArea is a text box defined by
<div id="outputArea"></div>
Show the web page that would be produced by the following while loop:

11. Solution of Q5
Ans: 10 7 4 1

12. Question 6 Suppose outputArea is a text box defined by
<div id="outputArea"></div>
Show the web page that would be produced by the following while loop:

13. Solution of Q6
Ans: 2 4
DONE WITH SECOND!

14. Question 7 Suppose outputArea is a text box defined by
<div id="outputArea"></div>
Show what would be displayed in outputArea by the following codes:

15. Solution of Q7
Ans:
因While為無窮迴圈，網頁會無回應。

16. Question 8 Suppose outputArea is a text box defined by
<div id="outputArea"></div>
Show what would be displayed in outputArea by the following codes:

17. Solution of Q8
Ans:
num=4

18. Question 9
Suppose N is a positive integer. Please write JavaScript codes, using while loop, to get the sum of all positive odd integers less than or equal to N.

19. Solution of Q9
Ans:設inputBox的輸入為N則執行以下 function

20. Question 10(1/2)
Consider the following program:

21. Question 10(2/2)
Please show the page after the user types 5 in the startBox text box and pushes the button.

22. Solution of Q10

23. Question 11(1/2) Suppose outputArea is a text box defined by
<div id="outputArea"></div>
Show what would be displayed in outputArea by the following codes:

24. Question 11(2/2)

25. Solution of Q11
Ans: 1 2 4 8 16
Finished!

26. Question 12(1/2)
Consider the following machine language program stored in the memory:
Memory address 0:
Memory address 1:
Memory address 2:
Memory address 3:
Memory address 4:
Memory address 5:
Memory address 6:
Memory address 7:
Memory address 8:
Memory address 9:
Memory address 10:

27. Question 12(2/2)
Note that instructions are placed at memory addresses 0 to 6, and data are placed at memory addresses 7 to 10. What are the content of memory addresses 7 to 10 after this program is executed?

28. Solution of Q12(1/2) 1000000100101001→R1=M[9] →R1=110
Ans:
→RO=M[10] →R0=210
→R1=M[9] →R1=110
→R2=M[8] →R2=410
→R3=R0+R1 →R3=310
→R3=R2+R3 →R3=710
→M[7]=R3 →M[7]=710
→half

29. Solution of Q12(2/2)
Ans: M[7]= , M[8]= , M[9]= , M[10]= ,

30. Question 13
What sequence of assembly-language instructions corresponds to the instructions at memory addresses 0 to 6 of the machine language program of Problem 12?

31. Solution of Q13 Ans: LOAD R0 10 LOAD R1 9 LOAD R2 8 ADD R3 R0 R1
STORE 7 R3
HALT

32. Question 14
Please write an assembly-language program which stores the value 0 in memory address 5.

33. Solution of Q14 Ans: SUB R0 R0 R0;//把Register 0清成0
STORE 5 R0;//把Register 0的值寫入Mem 5
HALT;