CC-COMPROG11 - Computer Programming 1 Midterm Examination

Which function is safest to use for reading strings in C to prevent buffer overflow?

• gets()

• scanf("%s", str)

• fgets()

• getchar()

What does the following code output if user inputs Hello?

char ch;

ch = getchar();

printf("%c", ch);

• H

• Hello

• e

• Error

Which function is now deprecated in C because of its insecurity?

• scanf()

• fgets()

• gets()

• getchar()

What will happen in this code?

char name[10];

scanf("%s", name);

If user enters: programming

• Prints "programming" correctly

• Causes buffer overflow

• Prints only "progra"

• Prints "prog"

Which input method allows reading a string including spaces?

• scanf("%s", str)

• gets(str)

• fgets(str, sizeof(str), stdin)

• getchar()

What does strcspn(str, "\n") return if

str = "Hello\nWorld"?

• 5

• 6

• 10

• 11

Which placeholder is correct for reading a floating-point number with scanf()?

• %f

• %lf

• %d

• %c

Which of the following reads a single character from stdin?

• scanf("%s", ch);

• gets(ch);

• getchar();

• fgets(ch, 2, stdin);

If we declare int x; and do not initialize it, what is its value?

• 0

• NULL

• Undefined (garbage value)

• Depends on compiler

Which format specifier is used to print an unsigned integer?

• %d

• %u

• %lu

• %f