vu cs507 Mid Term Subjective Solved Past Paper No.4

vu cs507 Information Systems Solved Past Papers

This subjective solved past paper is related to book/course code vu cs507 Information Systems which belongs to vu organization. We have 8 past papers available related to the book/course Information Systems. This past paper has a total of 10 subjective questions belongs to topic Mid Term to get prepared. NVAEducation wants its users to help them learn in an easy way. For that purpose, you are free to get prepared for exams by learning subjective questions online on NVAEducatio.

NVAEducation also facilitates users to download these solved past papers with an affordable prices. However, users are not enforced to pay for money, rather they can use credits to buy such stuff on NVAEducation. Users can earn credits for doing some little tasks and then you will be able to use that credits to buy solved past papers on NVAEducation.

Question 1: When the instruction "push ax" is executed in decrementing stack how the value of SP will change

Answer:

Be the first to post an answer to earn 100 credits.

Question 2: Which bit is refer to the red component of background color

Answer:

Question 3: Which bit is refer to the red component of foreground color

Answer:

Question 4: Why is it necessary to provide the segment and offset address in case of FAR jump?

Answer:

Segment and offset must be given to a far jump. Because, sometimes we may need to go from one code segment to another, and near and short jumps cannot take us there. Far jump must be used and a two byte segment and a two byte offset are given to it. It loads CS with the segment part and IP with the offset part.

Question 5: Write a calculator for adding strings.

Answer:

Be the first to post an answer to earn 100 credits.

Question 6: Write a program in assembly language to disable keyboard interrupt using PIC mask register

Answer:

Be the first to post an answer to earn 100 credits.

Question 7: Write a program named "Countvowels" that counts all occurrences of the vowels in a source string and then prints the result in the format (vowel, count). For example if the string is 'afadefsoieaid' it should print (a,3) (e,2) (i,2) (o,1) (u,0) on the screen. The program should take address of the source string as a parameter via stack. Also provide proper comments against each instruction.
Note: String is assumed to contain only small case legal letters and length of the string is fixed to 15 characters. Vowel characters include a, e, i, o, u.

Answer:

Be the first to post an answer to earn 100 credits.

Question 8: Write a recursive function in assembly language to calculate the square of an integer by adding it in itself using recursive call. You can assume any integer number to calculate the square.

Answer:

Be the first to post an answer to earn 100 credits.

Question 9: Write a subroutine to calculate the string length?

Answer:

subroutine to calculate the length of a string; takes the segment and offset of a string as parameters

strlen: push bp
mov bp,sp
push es
push cx
push di
les di, [bp+4] ; point es:di to string
mov cx, 0xffff ; load maximum number in cx
xor al, al ; load a zero in al
repne scasb ; find zero in the string
mov ax, 0xffff ; load maximum number in ax
sub ax, cx ; find change in cx
dec ax ; exclude null from length
pop di
pop cx
pop es
pop bp
ret 4

Question 10: Write down the names of four segment registers?

Answer:

Be the first to post an answer to earn 100 credits.