Arrays and Strings - C Programming MCQ Questions and Answers

11

What occurs when a result has nowhere near the number of significant digits indicated by its type.

A) domain B) underflow C) overflow D) significance loss

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Answer & Solution

Answer: Option D

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12

The function strsp() is the complement of strcspn().

A) true B) false

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Answer & Solution

Answer: Option A

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13

NULL is the macro defined in the header string. h.

A) true B) false

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Answer & Solution

Answer: Option A

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14

The strpbrk() function is used to return a pointer to the character, or a null pointer if no character from s2 occurs in s1.

A) true B) false

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Answer & Solution

Answer: Option A

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15

What will be the output of the following C code?

const char str1[]="ABCDEF1234567";
const char str2[] = "269";
len = strcspn(str1, str2);
printf("First matching character is at %d\n", len + 1);

A) First matching character is at 8 B) First matching character is at 7 C) First matching character is at 9 D) First matching character is at 12

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Answer & Solution

Answer: Option A

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16

What will be the output of the following C code?

char str1[15];
char str2[15];
int mat;
strcpy(str1, "abcdef");
strcpy(str2, "ABCDEF");
mat= strncmp(str1, str2, 4);
if(mat< 0)
printf("str1 is not greater than str2");
else if(mat> 0)
printf("str2 is is not greater than str1");
else
printf("both are equal");

A) str1 is not greater than str2 B) str2 is not greater than str1 C) both are equal D) error in given code

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Answer & Solution

Answer: Option B

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17

The . . . . . . . . function returns a pointer to the first character of a token.

A) strstr() B) strcpy() C) strspn() D) strtok()

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Answer & Solution

Answer: Option D

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18

The mem functions are meant for . . . . . . . .

A) returning a pointer to the token B) manipulating objects as character arrays C) returning a pointer for implemented-defined string D) returning a pointer to first occurrence of string in another string

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Answer & Solution

Answer: Option B

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19

What will the given C code do?

int memcmp(const void *str1, const void *str2, size_t n)

A) compares the first n bytes of str1 and str2 B) copies the first n bytes of str1 to str2 C) copies the first n bytes of str2 to str1 D) invalid function

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Answer & Solution

Answer: Option A

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20

Which code from the given option return pointer to last occurrence of c in ch or NULL if not present?

A) char *strchr(ch, c) B) char *strrchr(ch, c) C) char *strncat(ch, c) D) char *strcat(ch, c)

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Answer & Solution

Answer: Option B

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