Trắc nghiệm lập trình C

Transcription

1 Title : Trắc nghiệm lập trình C Author : Vu Hong Viet Date : 07/09/2014 Các câu hỏi trắc nghiệm được thành viên diễn đàn vncoding sưu tập và biên soạn dựa trên quá trình học tập và kinh nghiệm thực tế. Chúng tôi đã chủ định biên soạn các câu hỏi trắc nghiệm bằng tiếng anh, vì đa số các đề thi trắc nghiệm lập trình vào các công ty phần mềm bằng tiếng anh. Đáp án được giải thích chi tiết tại diễn đàn: 1. Khái niệm cơ bản ngôn ngữ lập trình C 1. What is the correct value to return to the operating system upon the successful completion of a program? A. 0 B. -1 C. 1 D. Do not return a value 2. What is the only function all C programs must contain? A. start() B. system() C. main() D. program() 3. What punctuation is used to signal the beginning and end of code blocks? A. B. -> and <- C. BEGIN and END D. ( and ) 4. What punctuation ends most lines of C code? A.. B. ; C. : D. ' 5. Which of the following is a correct comment? A. */ Comments */ B. ** Comment ** C. /* Comment */ vncoding.net Page 1

2 D. Comment 6. Which of the following is not a correct variable type? A. float B. real C. int D. double 7. Which of the following is the correct operator to compare two variables? A. := B. = C. equal D. == 8. Which of the following is true? A. 1 B. 66 C..1 D. -1 E. All of the above 9. Which of the following is the boolean operator for logical-and? A. & B. && C. D. & 10. Evaluate!(1 &&!(0 1)) A. True B. False C. Unevaluatable 11. Which of the following shows the correct syntax for an if statement? A. if expression B. if expression C. if ( expression ) D. expression if 12. What is the final value of x when the code int x; for(x=0; x<10; x++) is run? A. 10 B. 9 C. 0 D When does the code block following while(x<100) execute? vncoding.net Page 2

3 A. When x is less than one hundred B. When x is greater than one hundred C. When x is equal to one hundred D. While it wishes 14. Which is not a loop structure? A. for B. do while C. while D. repeat until 15. How many times is a do while loop guaranteed to loop? A. 0 B. Infinitely C. 1 D. Variable 16. Which is not a proper prototype? A. int funct(char x, char y); B. double funct(char x) C. void funct(); D. char x(); 17. What is the return type of the function with prototype: "int func(char x, float v, double t);" A. char B. int C. float D. double 18. Which of the following is a valid function call (assuming the function exists)? A. funct; B. funct x, y; C. funct(); D. int funct(); 19. Which of the following is a complete function? A. int funct(); B. int funct(int x) return x=x+1; C. void funct(int) printf( "Hello" ); D. void funct(x) printf( "Hello" ); 20. Which follows the case statement? A. : B. ; C. - vncoding.net Page 3

4 D. A newline 21. What is required to avoid falling through from one case to the next? A. end; B. break; C. Stop; D. A semicolon. 22. What keyword covers unhandled possibilities? A. all B. contingency C. default D. other 23. What is the result of the following code? int x=0; switch(x) case 1: printf( "One" ); case 0: printf( "Zero" ); case 2: printf( "Hello World" ); A. One B. Zero C. Hello World D. ZeroHello World 24. Which of the following is the proper declaration of a pointer? A. int x; B. int &x; C. ptr x; D. int *x; 25. Which of the following gives the memory address of integer variable a? A. *a; B. a; C. &a; D. address(a); 26. Which of the following gives the memory address of a variable pointed to by pointer a? A. a; vncoding.net Page 4

5 B. *a; C. &a; D. address(a); 27. Which of the following gives the value stored at the address pointed to by pointer a? A. a; B. val(a); C. *a; D. &a; 28. Which of the following is the proper keyword or function to allocate memory in C? A. new B. malloc C. create D. value 29. Which of the following is the proper keyword or function to deallocate memory? A. free B. delete C. clear D. remove 30. Which of the following accesses a variable in structure b? A. b->var; B. b.var; C. b-var; D. b>var; 31. Which of the following accesses a variable in a pointer to a structure, *b? A. b->var; B. b.var; C. b-var; D. b>var; 32. Which of the following is a properly defined struct? A. struct int a; B. struct a_struct int a; C. struct a_struct int a; D. struct a_struct int a;; 33. Which properly declares a variable of struct foo? A. struct foo; B. struct foo var; C. foo; D. int foo; vncoding.net Page 5

6 34. Which of the following correctly declares an array? A. int anarray[10]; B. int anarray; C. anarray10; D. array anarray[10]; 35. What is the index number of the last element of an array with 29 elements? A. 29 B. 28 C. 0 D. Programmer-defined 36. Which of the following is a two-dimensional array? A. array anarray[20][20]; B. int anarray[20][20]; C. int array[20, 20]; D. char array[20]; 37. Which of the following correctly accesses the seventh element stored in foo, an array with 100 elements? A. foo[6]; B. foo[7]; C. foo(7); D. foo; 38. Which of the following gives the memory address of the first element in array foo, an array with 100 elements? A. foo[0]; B. foo; C. &foo; D. foo[1]; 39. Which of the following is a string literal? A. Static String B. "Static String" C. 'Static String' D. char string[100]; 40. What character ends all strings? A. '.' B. ' ' C. '\0' D. '/0' 41. Which of the following reads in a string named x with one hundred characters? vncoding.net Page 6

7 A. fgets(x, 101, stdin); B. fgets(x, 100, stdin); C. readline(x, 100, '\n'); D. read(x); 42. Which of the following functions compares two strings? A. compare(); B. stringcompare(); C. cmp(); D. strcmp(); 43. Which of the following adds one string to the end of another? A. append(); B. stringadd(); C. strcat(); D. stradd(); 2. Biến, toán tử và biểu thức toán học 1. What will be output when you will execute following c code? printf("%d\t",sizeof(6.5)); printf("%d\t",sizeof(90000)); printf("%d",sizeof('a')); return 0; Biết kích thước kiểu char : 1 byte, float : 4 byte, int : 4 byte, double : 8 byte, long : 4 byte. A B C D. Depend on complier 2. What will be output when you will execute following c code? double num=5.2; int var=5; printf("%d\t",sizeof(!num)); printf("%d\t",sizeof(var=15/2)); printf("%d",var); return 0; vncoding.net Page 7

8 A B C D. Another 3. What value gets printed by the program below? int w = 3; int x = 31; int y = 10; double z = x / y % w; printf("%f\n", z); A. 1 B. 0 C What will be output when you will execute following c code? char a=250; int expr; expr= a+!a + ~a + ++a; printf("%d",expr); return 0; A. - 6 B. 4 C. 5 D. Another 5. What will be output when you will execute following c code? int a=-5; unsigned int b=-5u; // (*) if(a==b) printf("avatar"); else printf("alien"); return 0; A. Avatar B. Alien C. Error at (*) vncoding.net Page 8

9 D. Another 6. What will be output when you will execute following c code? #include <stdio.h> #include <conio.h> int x = 3; printf("%d", x x); A. 7 B. 8 C. 9 D. Another 7. What output is? int i=5,j=6,k; k=i&j; printf("%d",k); A. 4 B. 0 C. 1 D What output is? int i=5,j=6; printf("%d", i j); A. 7 B. 6 C. 5 D Output of following code: vncoding.net Page 9

10 #include "conio.h" extern int x=0; x++; printf("%d",x); A. 0 B. Error C. 1 D. x isn't defined 10. Output of following code: extern int x=0; int x=1; printf("%d",x); A. 0 B. 1 C. Error Comlier 11. Output of following code: int y=0; int x=0; x++; ++y; printf("%d\t%d",x,y); A. 1 1 B. 1 0 C. 'x' undeclared identifier vncoding.net Page 10

11 12. Output of following code: int x; x++; printf("%d",x); A. 1 B. 0 C. Error 13. Output of following code: int x=0; int x=0,y=0; y++; x++; printf("%d",x); A. 1 B. Error C Output of following code: void count() static int page=0; printf("%d",page); page++; int i; for(i=0;i<10;i++) count(); vncoding.net Page 11

12 A B C Output of following code: const int x = 5; int x[x]; int y = sizeof(x) / sizeof(int); printf("%d",y); A. 1 B. 5 C. 20 D. 'x' isn't defined 16. What output is? int x=5,y=10,z=15; printf("%d %d %d"); return 0; A. Garbage Garbage Garbage B C D. Run time error 17. What output is? asm mov bx,8; mov cx,10 add bx,cx; printf("%d",_bx); return 0; vncoding.net Page 12

13 A. 18 B. 8 C. 0 D. Complie error 18. What output is? char *url="c:\tc\bin\rw.c"; printf("%s",url); return 0; A. c:\tc\bin\rw.c B. c:/tc/bin/rw.c C. c: c inw.c D. c:cinw.c E. w.c in 19. What output is? const int i=5; i++; printf("%d",i); return 0; A. 5 B. 6 C. 0 D. Complier error 20. What output is? #include<conio.h> char c=125; c=c+10; printf("%d",c); vncoding.net Page 13

14 A. 135 B. 8 C D What output is? #include<conio.h> char c=48; int i, mask=01; for(i=1; i<=5; i++) printf("%c", c mask); mask = mask<<1; A B. 1248@ C D What output is? #include<conio.h> float a = 0.7; if(0.7 > a) printf("hi\n"); else printf("hello\n"); A. Hi B. Hello C. None of above 3. Vòng lặp for, do..while 1. What value is returned by function func? vncoding.net Page 14

15 float func() int r = 0, d = 0, i=0; for (i; i < 2; i++) r += 5 / d; return r; A. 5 B. 0 C. Exception D. Another 2.What will be output when you will execute following c code? char s[ ]="man"; int i; for(i=0;s[ i ];i++) printf("%c%c%c%c\t",s[ i ],*(s+i),*(i+s),i[s]); A. mmmm aaaa nnnn B. mmm aaa nnn C. mmmm aaa nnn D. Another 3. What will be output when you will execute following c code? int i = 0; char ch = 'A'; do putchar (ch); while(i++ < 5 ++ch <= 'F'); A. AAAAAABCDEF B. AAAAAABCDE C. ABCDEF D. Another vncoding.net Page 15

16 4. What gets printed? int array[2][2] = 0, 1, 2, 3; int i; int sum = 0; for (i =0; i < 4; ++i) int x, y; x = i % 2; if (x) y = 0; else y = 1; sum += array[x][y]; printf("%d\n", sum); A. 4 B. 5 C. 6 D What output is? #include <stdio.h> #include <conio.h> int k; for (k = -3; k < -5; k++) printf("hello"); A. Hello B. Nothing C. Complier Error D. Run time error 6. What output is? vncoding.net Page 16

17 double k = 0; for (k = 0.0; k < 3.0; k++); printf("%lf", k); A. 012 B. Run time error C. 3 D What output is? #include <stdio.h> int i = 0; for (; ; ;) printf("in for loop\n"); printf("after loop\n"); A. Complie time error B. Infinite Loop C. Nothing 8. What output is? #include <conio.h> #include <stdio.h> int foo(); int i = 0; for (foo(); i == 1; i = 2) printf("in for loop\n"); printf("after loop\n"); int foo() return 1; A. In for loop B. After loop C. Complie error vncoding.net Page 17

18 9. What output is? #include <conio.h> #include <stdio.h> int i = 0; while (i = 0) printf("true\n"); printf("false\n"); A. True B. False C. Complie Error D. Another 10. What output is? #include <conio.h> #include <stdio.h> int i = 0, j = 0; while (i < 5, j < 10) i++; j++; printf("%d, %d\n", i, j); A. 5, 5 B. 10, 10 C. Syntax error 11. What output is? #include <conio.h> #include <stdio.h> int a = 0, i = 0, b = 0 ; for (i = 0;i < 5; i++) a++; vncoding.net Page 18

19 continue; b++; printf("\n a = %d,b =%d",a,b); A. a = 5,b = 5 B. a = 4,b = 4 C. a = 5,b = 0 D. Another 12. What output is? int i = 0; for (i = 0;i < 5; i++) if (i < 4) printf("hello"); break; A. Hello B. Hello is printed 3 times C. Hello is prined 4 times D. Hello is printed 5 times 13. What output is? #include<conio.h> int i=0; for(;i<=2;) printf(" %d",++i); A B C What output is? vncoding.net Page 19

20 #include<conio.h> int x; for(x=1;x<=5;x++); printf("%d",x); A B C. 6 D What output is? #include <stdio.h> #include <conio.h> int i = 3; while (i--) int i = 100; i--; printf("%d ", i); A B. Complier Error C How many times will "vncoding" is printed on screen? #include <stdio.h> #include <conio.h> int i = 1024; for (; i; i >>= 1) printf("\nvncoding"); A. 10 B. 11 vncoding.net Page 20

21 C. Infinite 17. What output is? #include <conio.h> int i=2,j=2; while(i+1?--i:j++) printf("%d",i); A. 1 B. 2 C. Complier Error 18. What output is? #include <conio.h> int i,j; i=j=2; while(--i&&j++) printf("%d %d",i,j); A. 1 3 B. 1 2 C. Không in ra kí tự nào 19. What output is? #include <conio.h> int x=011,i; for(i=0;i<x;i+=3) printf("start "); continue; printf("end"); vncoding.net Page 21

22 A. Start End Start End B. Start Start Start C. Start Start Start Start 4. If/else, switch( ) case, goto 1. What gets printed? int i = 3; if (!i) i++; i++; if (i==3) i+=2; i+=2; printf("%d\n", i); A. 7 B. 5 C. 6 D. Another 2. What gets printed? int x; if(x=0) printf ("Value of x is 0"); else printf ("Value of x is not 0"); A. Value of x is 0 B. Value of x is not 0 C. Error 3. What gets printed? vncoding.net Page 22

23 int i; for(i=0;i<20;i++) switch(i) case 0:i+=5; case 1:i+=2; case 5:i+=5; default: i+=4; break; printf("%d,",i); A. 14,18, B. 16,20, C. 16,21, 4. What gets printed? static int i; while(i<=10&&i>=0) (i>2? i++:i--); printf("%d",i); A. -1 B. 0 C. Complier error 5. What output is? int i=10,j=20; if(i=20) printf(" Hello"); else printf(" Hi"); A. Hello B. Hi vncoding.net Page 23

24 C. Complier error 6. What output is? int x=0,y=0; if(x==0 ++y) printf(" x=%d",x); printf(" y=%d",y); A. x=0 y=1 B. x=0 y=0 C. Error syntax 7. What output is? int i = 5, k; if (i == 0) goto label; label: printf("%d", i); printf("hey"); A. Hey B. 5 C. 5Hey D. Complie error 8. What output is? printf("%d ", 1); goto l1; printf("%d ", 2); l1:goto l2; printf("%d ", 3); l2:printf("%d ", 4); A. 1 4 B vncoding.net Page 24

25 C. Syntax error D. Another 9. What output is? #include <conio.h> #include <stdio.h> void foo(); printf("%d ", 1); goto l1; printf("%d ", 2); void foo() l1: printf("3 "); A. Complie error B. 3 C. 1 D What output is? #include <conio.h> #include <stdio.h> int i = 0, j = 0; while (i < 2) l1: i++; while (j < 3) printf("loop\n"); goto l1; A. loop loop loop B. Infinite loop C. Complie error 11. What output is? vncoding.net Page 25

26 int i = 0, j = 0; while (l1: i < 2) i++; while (j < 3) printf("loop\n"); goto l1; A. loop loop B. loop loop loop loop C. Complie error D. Another 12. What output is? int a=15,b=10,c=5; if(a>b>c ) printf("true"); else printf("false"); A. True B. False C. Complier Error D. Run time error 13. What output is? #include <stdio.h> #include <conio.h> int i = 0; switch (i) case '0': printf("a"); break; case '1': printf("b"); vncoding.net Page 26

27 break; default: printf("abc"); A. A B. B C. ABC 14. What output is? #include <stdio.h> #include "conio.h" int i = 3; switch (i) case 0+1: printf("a"); break; case 1+2: printf("b"); break; default: printf("abc"); A. A B. B C. ABC 15. What output is? #include <stdio.h> #include <conio.h> #define A 0 #define B 1 int i = 3; switch (i & 1) case A: printf("false"); break; case B: printf("true"); break; default: printf("default"); vncoding.net Page 27

28 A. FALSE B. TRUE C. Default 16. What output is? #include <stdio.h> #include <conio.h> int i; if (printf("0")) i = 3; else i = 5; printf("%d", i); A. 3 B. 5 C. 03 D What output is? #include <conio.h> int a = 5; switch(a) default: a = 4; case 6: a--; case 5: a = a+1; case 1: a = a-1; printf("%d \n", a); A. 5 B. 4 vncoding.net Page 28

29 C What output is? #include <stdio.h> #include <conio.h> int x = 3; if (x == 2); x = 0; if (x == 3) x++; else x += 2; printf("x = %d", x); A. x = 2 B. x = 6 C. x = What output is? #include <stdio.h> #include <conio.h> int check = 20, arr[] = 10, 20, 30; switch (check) case arr[0]: printf("a "); case arr[1]: printf("b"); case arr[2]: printf("c"); A. ABC B. BC C. B D. Complier Error 5. Con trỏ,mảng,string 1. What output is? void myfunc(char** param) vncoding.net Page 29

30 ++param; char* string = (char*)malloc(64); strcpy(string, "hello_world"); myfunc(&string); myfunc(&string); printf("%s\n", string); A. hello_world B. ello_world C. llo_world D. lo_world 2. What is output? void myfunc(char** param) ++*param; char* string = (char*)malloc(64); strcpy(string, "hello_world"); myfunc(&string); myfunc(&string); printf("%s\n", string); A. hello_world B. ello_world C. llo_world D. lo_world 3. What is output? int ints[] = 0, 1, 2, 3 ; int* i1 = ints + 1; int a = ++*i1; int b = a + *i1; printf("%d\n", b); vncoding.net Page 30

31 A. 4 B. 3 C What output is? int ints[] = 0, 5, 10, 15 ; int* i2 = ints + 2; int a = *i2++; // <=> a = *(i2++); printf("%d#%d\n", a, *i2); A. 10#15 B. 10#10 C. 15#15 D. 11#15 5. What output is? int ints[] = 0, 5, 10, 15 ; int* i2 = ints + 2; int a = *++i2; // <=> a = *(++i2); printf("%d#%d\n", a, *i2); A. 10#15 B. 10#10 C. 15#15 D. 11#15 6. What is output? int ints[] = 0, 1, 2, 3 ; int* i1 = ints + 1; int* i2 = ints + 2; int a = ++*i1 + *i2++; int b = *++i1 + *i2--; printf("%d#%d", a, b); vncoding.net Page 31

32 A. 4#4 B. 4#5 C. 5#6 D. 4#6 7. What output is? int i=400; int *ptr=&i; *++ptr=2; printf("%d %d",i,*ptr); A B C D. Complier error 8. What output is? char str[]="pvpit"; char *s1=str; s1++; printf("%c",*s1); A. pvpit B. vpit C. v D. Another 9. What output is? char *s="\12345s\n"; printf("%d",strlen(s)); printf("\n%s",s); vncoding.net Page 32

33 A. 5 B. 7 C. 9 D For the code below which lines should be reported as errors by a compiler? int main(int argc, char** argv) const char* foo = "wow"; // line 1 foo = "top"; // line 2 foo[0] = 1; // line 3 return 0; A. 1 B. 2 C. 3 D. None of the lines 11. What output is? int x = 5,y = 6; int* const p=&x; p = &y; printf("%d",(*p)); A. Complier error B. 6 C. 5 D. Another 12. What output is? int x = 5,y = 8; const int* p; p = &x; p = &y; x++; printf("%d",*p); vncoding.net Page 33

34 A. 5 B. 6 C. 8 D. Complier Error 13. What output is? int x = 5; const int* p; p = &x; x++; *p = 4; printf("%d",*p); A. 5 B. 6 C. 4 D. Complier Error 14. What will be output of following program? int a = 320; char *ptr; ptr =( char *)&a; printf("%d ",*ptr); return 0; A. 320 B. 64 C. Complier Error 15. What will be output of following program? int i = 3; int *j; int **k; vncoding.net Page 34

35 j=&i; k=&j; printf("%u, %u, %d ",k,*k,**k); return 0; A. Address of j, Address of i, 3 B. Complier Error C. 3, 3, What will be output of following program? #include<conio.h> #include<string.h> char *ptr1 = NULL; char *ptr2 = 0; printf("\n%d",ptr2); strcpy(ptr1," c"); strcpy(ptr2,"questions"); printf("\n%s %s",ptr1,ptr2); 17. What will be output of following program? #include<conio.h> int a = 10; void *p = &a; int *ptr = p; printf("%u\n",*ptr); 18. What will be output of following program? #include<conio.h> int a = 5,b = 10,c; vncoding.net Page 35

36 int *p = &a,*q = &b; c = p - q; printf("%d", c); Answer: 19. What will be output of following program? #include<conio.h> int i = 5, j; int *p, *q; p = &i; q = &j; j = 5; printf("%d %d",*p,*q); A. 5 5 B. Complier Error C. 5 Garbage value 20. What will be output of following program? #include<conio.h> int i = 5; int *p; p = &i; printf(" %u %u", *&p, &*p); A. Address of i Address of i B. Garbage value Garbage value C. Complier Error 6. Con trỏ, mảng, string (tiếp) 21. What output is? vncoding.net Page 36

37 #include<conio.h> int array[2][2][3]=0,1,2,3,4,5,6,7,8,9,10,11; printf("%d",array[1][0][2]); A. 6 B. 7 C. 8 D What output is? #include<conio.h> char arr[8]='v','i','e','t','n','a','m'; char *p; p=(char *)(arr+2)[2]; printf("%c",p); A. I B. E C. M D. N 23. What will be output of following program? #include "stdio.h" #include "conio.h" char ch[]='0','1','2','3','4','5','6','7','8','9'; int *p=(int*)ch; p++; printf("%x",*p); (Giả sử: kiến trúc máy tính sử dụng là little endian) A B C vncoding.net Page 37

38 24. What output is? #include<conio.h> int i=11; int const * p=&i; p++; printf("%d",*p); A. 11 B. 12 C. Garbage value D. Complier error 25. Which of the following statements are correct about an array? 1. The array int num[26]; can store 26 elements 2. The expression num[1] designates the very first element in the array 3. It is necessary to initialize the array at the time of declaration. 4. The declaration num[size] is allowed if SIZE is a macro. A. 1,4 B. 3 C. 1,2 D The library function used to find the last occurrence of a character in a string is A. strnstr() B. strrchr() C. laststr() D. strstr() 27. What output is? (assuming that the array begins at the location 1002 and size of an integer is 4 bytes) #include<conio.h> int a[3][4] = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ; printf("%u, %u, %u\n", a[0]+1, *(a[0]+1), *(*(a+0)+1)); vncoding.net Page 38

39 A. 1006, 2, 2 B. 1006, 4, 4 C. 1002, 5, 5 D. Error 28. What does the following declaration mean? int (*ptr)[10]; A. ptr is array of pointers to 10 integers B. ptr is a pointer to an array of 10 integers C. ptr is an array of 10 integers D. ptr is an pointer to array 29. What output is? #include<conio.h> char str[] = "VNCODING\0\.NET\0"; printf("%s\n", str); A. VNCODING B. VNCODING\0\.NET\0 C. VNCODING\0\.NET 30. What output is? #include<conio.h> void swap(char *, char *); char *pstr[2] = "VNCODING", ".NET"; swap(pstr[0], pstr[1]); printf("%s%s", pstr[0], pstr[1]); void swap(char *t1, char *t2) char *t; t=t1; t1=t2; t2=t; vncoding.net Page 39

40 A. VNCODING.NET B..NETVNCODING C. Address of pstr[0] Address of pstr[1] 31. What output is? #include<conio.h> void swap(char **, char **); char *pstr[2] = "VNCODING", ".NET"; swap(&pstr[0], &pstr[1]); printf("%s%s", pstr[0], pstr[1]); void swap(char **t1, char **t2) char *t; t=*t1; *t1=*t2; *t2=t; A. VNCODING.NET B..NETVNCODING C. Address of pstr[0] Address of pstr[1] 7. Struct,union,enum 1. What output of code is? #include "stdio.h" #include "conio.h" typedef struct char c; // 1 byte float b; // 4 byte int a; // 4 byte A; printf("\n Size of struct: %d",sizeof(a)); Giả sử dùng VC trên hệ điều hành 32 bit A. 9 vncoding.net Page 40

41 B. 12 C. 16 D What output of code is? #include "stdio.h" #include "conio.h" typedef struct int a[2]; // 8 byte char b[5]; // 5 byte char c[5]; // 5 byte A; printf("\n Size of struct: %d",sizeof(a)); A. 20 B. 18 C. 32 D What output of the following code is? #include "stdio.h" #include "conio.h" struct birthday int d; // day int m; // month int y; // year ; struct info int ID; // code of staff birthday b; ; info a = 1009,16,9,1989; printf("\nid=%d, dd/mm/yyyy = %d/%d/%d",a.id,a.b.d,a.b.m,a.b.y); vncoding.net Page 41

42 A. ID=1009, dd/mm/yyyy = 16/09/1989 B. ID = 1009, dd/mm/yyyy = garbage value/garbage value/garbage value (garbage value: giá trị rác) C. Error sytax (Lỗi cú pháp) 8. Macro 1. What output is? #include<conio.h> #define x 5+2 int i; i=x*x*x; printf("%d",i); A. 21 B. 27 C. Complier Error D. Another 2. What output is? #include<conio.h> #define call(x,y) x##y int x=5,y=10,xy=20; printf("%d",xy+call(x,y)); A. 530 B. 70 C. 40 D. Complier Error vncoding.net Page 42