CSc101 Finals SPECIAL Slideshow Reviewer Part 2.pdf

A few reminders

Try to solve each problem on your own.

Help out a friend if they dont understand.

Ask if something is not clear.

Wait for somebody to answer for you.

Forget your basics.

Forget your loopings, arrays, if-elses, and switches.

Indexes start at 0.

0 starts at 48, A starts at 65, a starts at 97.

Numbers < Capital Letters < Small Letters.

A letter is smaller than the one next to it i.e.:

A < B < C < a < b < c

Indexes start at 0.

Counting of characters start at 1.

Null terminator \0 at the end.

What is the value returned if we invoke fun(11);?

Answer:

int fun(int x)

{

int result;

if (x == 0)

result = 0;

else if ((x % 2) == 0)

result = fun(x / 2);

else

result = 1 + fun(x / 2);

return result;

}

What is the value returned if we invoke fun(11);?

Answer:

3

int fun(int x)

{

int result;

if (x == 0)

result = 0;

else if ((x % 2) == 0)

result = fun(x / 2);

else

result = 1 + fun(x / 2);

return result;

}

What is the outputof the code?

Answer:

#include

int somefun(int x, int y);

int somefun(int x, int y)

{

int answer;

if(y == 0)

answer = 1;

else

answer = x*somefun(x,y-1);

return answer;

}

int main()

{

printf("%d", somefun(3,3));

return 0;

}

What is the outputof the code?

Answer:27

#include

int somefun(int x, int y);

int somefun(int x, int y)

{

int answer;

if(y == 0)

answer = 1;

else

answer = x*somefun(x,y-1);

return answer;

}

int main()

{

printf("%d", somefun(3,3));

return 0;

}

What is the

function trying to do?

Answer:

int foo(char str[], char c)

{

int answer;

if(str[0] == '\0')

answer = 0;

else if (str[0] == c)

answer = 1+foo(&str[1], c);

else

answer = foo(&str[1], c);

return answer;

}

What is the


Answer:

It counts the number of char cs in string str.

int foo(char str[], char c)

{

int answer;

if(str[0] == '\0')

answer = 0;

else if (str[0] == c)

answer = 1+foo(&str[1], c);

else

answer = foo(&str[1], c);

return answer;

}

What is the


Answer:

int bar(char str[])

{

int answer;

if(str[0] == '\0')

answer = 0;

else

answer = 1 + bar(&str[1]);

return answer;

}

What is the


Answer:

It returns the length of string str.

int bar(char str[])

{

int answer;

if(str[0] == '\0')

answer = 0;

else

answer = 1 + bar(&str[1]);

return answer;

}

Answer:

Given the definitions of functions foo() and

bar() in Problem#3 and #4, what will be the

output after the execution of the following code

snippet?

char title[] = "PrObLeMsOlViNgAnDPrOgRaMdEsIgNiNc";

printf("Foo = %d\nBar = %d",bar(title),foo(title,'i'));

Answer:

Foo = 33

Bar = 2

Given the definitions of functions foo() and

bar() in Problem#3 and #4, what will be the

output after the execution of the following code

snippet?

char title[] = "PrObLeMsOlViNgAnDPrOgRaMdEsIgNiNc";

printf("Foo = %d\nBar = %d",bar(title),foo(title,'i'));

What is the output displayed if we invoke fun(2);?

Answer:

int fun(int x)

{

printf("%di ", x);

int result;

if (x == 0)

result = 0;

else

result = x + fun(x - 1);

printf("%do ", x);

return result;

}

What is the output displayed if we invoke fun(2);?

Answer:

2i 1i 0i 0o 1o 2o

int fun(int x)

{

printf("%di ", x);

int result;

if (x == 0)

result = 0;

else

result = x + fun(x - 1);

printf("%do ", x);

return result;

}

What is the output displayed if we invoke MysterySeq(10);?

Answer:

void MysterySeq(int n)

{

if (n == 0)

return;

else if (n%2 == 0)

n = n*3 + 1;

else

n = n / 2;

MysterySeq(n);

printf("%d ", n);

}

What is the output displayed if we invoke MysterySeq(10);?

Answer:

0 1 3 7 15 31

void MysterySeq(int n)

{

if (n == 0)

return;

else if (n%2 == 0)

n = n*3 + 1;

else

n = n / 2;

MysterySeq(n);

printf("%d ", n);

}

What is the


Answer:

void funA(int n)

{

if(n == 0) return;

else

{

printf("%d", n%10);

n /= 10;

funA(n);

}

}

What is the


Answer:

It prints the number n whose digits are in reverse order.

void funA(int n)

{

if(n == 0) return;

else

{

printf("%d", n%10);

n /= 10;

funA(n);

}

}

What is the


Answer:

int funB(int n)

{

int digit = 0;

if(n == 0) return 0;

else

{

digit = n%10;

n /= 10;

return digit + funB(n);

}

}

What is the


Answer:

It returns the sum of the digits of number n.

int funB(int n)

{

int digit = 0;

if(n == 0) return 0;

else

{

digit = n%10;

n /= 10;

return digit + funB(n);

}

}

Answer:

#include

void recFoo(int n, int m, char *str)

{

if(n==(m-1))

printf("%c", *(str+n));

else

recFoo(n+1, m, str);


}

int main()

{

char bar[] = "Problem Solving and Program Design in C";

recFoo(20, 34, bar);

return 0;

}

Answer:

ngiseD margorP

#include

void recFoo(int n, int m, char *str)

{

if(n==(m-1))


else

recFoo(n+1, m, str);


}

int main()

{

char bar[] = "Problem Solving and Program Design in C";

recFoo(20, 34, bar);

return 0;

}

strlen(str)

strcpy(var, str)

strncpy(var, str, n)

strcmp(str1, str2)

strncmp(str1, str2, n)

strcat(str1,str2)

strncat(str1,str2,n)

strlwr(str)

strupr(str)

toupper(char)

tolower(char)

7 basic operations

4 additional

What is output of the program?

Answer:

#include

#include

int main()

{

char name1[100] = "jone ";

char name2[100] = "few jr";

char full[100] = "user ";

full = strncat(name1,name2,3);

name1[3] = '\0';

printf("%s", full);

return 0;

}


Answer:

No output.

Compiler Error.

#include

#include

int main()

{




full = strncat(name1,name2,3);

name1[3] = '\0';

printf("%s", full);

return 0;

}


Answer:

#include

#include

int main()

{




strcpy(full,strncat(name1,name2,

3));

name1[3] = '\0';

printf("%s", full);

return 0;

}


Answer:

jone few

#include

#include

int main()

{




strcpy(full,strncat(name1,name2,

3));

name1[3] = '\0';

printf("%s", full);

return 0;

}

What is output after the execution of the snippet?

char name[50] = "first";

char fullname[100] = "full";

char nickname[50] = "nick";

printf("%s %s %s %s", name, nickname, fullname,

strcat(nickname, strcat(fullname, &name[0])));

Answer:


char name[50] = "first";

char fullname[100] = "full";

char nickname[50] = "nick";

printf("%s %s %s %s", name, nickname, fullname,

strcat(nickname, strcat(fullname, &name[0])));

Answer:first nickfullfirst fullfirst nickfullfirst


char tongue[] = "Peter Piper picked a peck of pickled

peppers.";

char twister[20];

strncpy(twister, tongue, 11);

tongue[0] = '\0';

printf("\n%s\n", tongue);

Answer:


char tongue[] = "Peter Piper picked a peck of pickled

peppers.";

char twister[20];

strncpy(twister, tongue, 11);

tongue[0] = '\0';

printf("\n%s\n", tongue);

Answer:Nothing will be displayed


char first[50] = "Fitzwilliam";

char last[50] = "Darcy";

char full[50];

printf("%s", strcat(strcpy(full, &first[4]), last));

Answer:


char first[50] = "Fitzwilliam";

char last[50] = "Darcy";

char full[50];

printf("%s", strcat(strcpy(full, &first[4]), last));

Answer:williamDarcy


char tmp1[15], tmp2[15], tmp3[15];

char str1[] = "Counter Terrorist";

char str2[] = "Los Angeles Lakers";

strcpy(tmp3, &str1[8]);

tmp3[9] = '\0';

strncpy(tmp2, &str2[0], 3);

tmp2[3] = '\0';

strncpy(tmp1, str1, 2);

tmp1[2] = '\0';

printf("%s %s %s",strcat(tmp2,"n"),tmp1,strcat(tmp3,"as"));

Answer:


char tmp1[15], tmp2[15], tmp3[15];

char str1[] = "Counter Terrorist";

char str2[] = "Los Angeles Lakers";

strcpy(tmp3, &str1[8]);

tmp3[9] = '\0';

strncpy(tmp2, &str2[0], 3);

tmp2[3] = '\0';

strncpy(tmp1, str1, 2);

tmp1[2] = '\0';

printf("%s %s %s",strcat(tmp2,"n"),tmp1,strcat(tmp3,"as"));

Answer:Losn Co Terroristas

Given the declaration below, how to you accomplish the instruction:

"Store in s1 the first three characters

of sss";

char sss[12] = "123-45-6789";

char s1[4], s2[3], s3[5];

Answer:


"Store in s1 the first three characters

of sss";

char sss[12] = "123-45-6789";

char s1[4], s2[3], s3[5];

Answer:strncpy(s1, sss, 3); s1[3] = '\0';


"Store in s2 the middle two-digit portion

of sss";

char sss[12] = "123-45-6789";

char s1[4], s2[3], s3[5];

Answer:


"Store in s2 the middle two-digit portion

of sss";

char sss[12] = "123-45-6789";

char s1[4], s2[3], s3[5];

Answer:strncpy(s2, &sss[4], 2); s2[2] = '\0';


"Store in s3 the final four digits of

sss";

char sss[12] = "123-45-6789";

char s1[4], s2[3], s3[5];

Answer:


"Store in s3 the final four digits of

sss";

char sss[12] = "123-45-6789";

char s1[4], s2[3], s3[5];

Answer:strcpy(s3,&sss[7])s3[4] = '\0';

strncpy(s3, &sss[7], 4); s3[4] = '\0';

What does this

function myLength()

do?

Answer:

int myLength(char string[])

{

int index = 0, count = 0;

while(string[index] != '\0')

{

count++;

index++;

}

return count;

}

What does this

function myLength()

do?

Answer:

It counts the no. of chars in the string.

int myLength(char string[])

{

int index = 0, count = 0;

while(string[index] != '\0')

{

count++;

index++;

}

return count;

}

Which of the following gives the memory address of a variable a?

Choices:

a. a;

b. *a;

c. &a;

d. address(a);

Which of the following gives the memory address of a variable a?

Answer:

a. a;

b. *a;

c. &a;

d. address(a);

Given the code snippet below which among the following will give the memory address pointed to by pointer p? *

int *p, x;

p = &x;

Answer:

Given the code snippet below which among the following will give the memory address pointed to by pointer p? *

int *p, x;

p = &x;

Answer:

p

Which of the following gives the value stored at the address pointed to by pointer a?

Choices:

a. a;

b. val(a);

c. *a;

d. &a;

Which of the following gives the value stored at the address pointed to by pointer a?

Answer:

a. a;

b. val(a);

c. *a;

d. &a;

Whats the output after the execution of the program?

Answer:

#include

void somefun(int *i, int *j);

int main()

{

int i = 5, j = 2;

somefun(&i, &j);

printf("\n%d %d\n", i, j);

return 0;

}

void somefun(int *i, int *j)

{

*i = *i * *j;

*j = *j * *i;

}


Answer:

10 20

#include

void somefun(int *i, int *j);

int main()

{

int i = 5, j = 2;

somefun(&i, &j);


return 0;

}

void somefun(int *i, int *j)

{

*i = *i * *j;

*j = *j * *i;

}


Answer:

#include

void somefun(int *i, int j);

int main()

{

int i=4, j=2;

somefun(&i, j);


return 0;

}

void somefun(int *i, int j)

{

*i = *i * *i;

j = j * j;

}


Answer:

16 2

#include

void somefun(int *i, int j);

int main()

{

int i=4, j=2;

somefun(&i, j);


return 0;

}

void somefun(int *i, int j)

{

*i = *i * *i;

j = j * j;

}


Answer:

#include

void MysteryFun(int q, int g);

int main()

{

int p=23, f=24;

MysteryFun(&p, &f);

printf ("\n%d %d", p, f);

return 0;

}

void MysteryFun(int q, int g)

{

q = q + g;

g = g + q;

}


Answer:

23 24

#include

void MysteryFun(int q, int g);

int main()

{

int p=23, f=24;

MysteryFun(&p, &f);

printf ("\n%d %d", p, f);

return 0;

}

void MysteryFun(int q, int g)

{

q = q + g;

g = g + q;

}


Answer:

#include

int main()

{

int a[] = {10, 20, 30, 40, 50};

int *j;

j = a;

j = j + 3;

printf("\n%d\n", *j);

return 0;

}


Answer:

40

#include

int main()

{

int a[] = {10, 20, 30, 40, 50};

int *j;

j = a;

j = j + 3;

printf("\n%d\n", *j);

return 0;

}

If a variable is a pointer to a structure, then which of the following operator is used to directly access data members of the structure through the pointer variable?

Choices:a. . operator

b. * operatorc. & operatord. -> operator

If a variable is a pointer to a structure, then which of the following operator is used to directly access data members of the structure through the pointer variable?

Answer:a. . operator

b. * operatorc. & operatord. -> operator

typedef struct {

char *name;

char gender;

} student_t;

void bar(student_t s[]) {

int check = strcmp(s[0].name,s[1].name);

switch(check) {

case 1: printf("%c", s[0].gender); break;

case -1: printf("%c", s[1].gender); break;

default: printf("Undefined");

}

}

int main() {

student_t studentA = {"Juan Dela Cruz", 'M'};

student_t studentB = {"June Doe", 'F'};

student_t students[] = {studentA, studentB};

bar(students);

return 0;

}

Answer:

typedef struct {

char *name;

char gender;

} student_t;


int check = strcmp(s[0].name,s[1].name);

switch(check) {




}

}

int main() {




bar(students);

return 0;

}

Answer:F

typedef struct {

char *name;

char gender;

} student_t;


int check = strncmp(s[0].name,s[1].name,2);

switch(check) {




}

}

int main() {




bar(students);

return 0;

}

Answer:

typedef struct {

char *name;

char gender;

} student_t;


int check = strncmp(s[0].name,s[1].name,2);

switch(check) {




}

}

int main() {




bar(students);

return 0;

}

Answer:Undefined

For more questions about Structures and

Pointers to Structures, answer past exams that

I have provided for you. I cannot paste new

problems here in the reviewer because they take

up too much space. Hint: Start reviewing from

the most recent past exam up to the old. ;)

is near! LOL

CSc101 Finals SPECIAL Slideshow Reviewer Part 2.pdf

Documents

Transcript of CSc101 Finals SPECIAL Slideshow Reviewer Part 2.pdf