PROGRAMMING IN C - UNIT 3 MCQS

What is a character array in C?

• A character array is used to store floating-point numbers.

• A character array is a type of integer array.

• A character array is a single character variable.

• A character array in C is a sequence of characters used to store strings, defined as 'char arrayName[size];'.

How do you declare a string in C?

• char stringName = 'Your string here';

• string stringName = 'Your string here';

• char stringName[] = "Your string here";

• char *stringName = 'Your string here';

Explain the difference between a character array and a string.

• A string is a fixed-size array, whereas a character array can change size dynamically.

• Strings can only contain letters, while character arrays can contain any data type.

• A character array is a type of string.

• A character array is a raw collection of characters, while a string is a character array with additional properties and functions.

What function is used to find the length of a string in C?

• getLength

• lengthOfString

• strlength

• strlen

How can you copy one string to another in C?

• Use copy(destination, source);

• Use strcpy(destination, source);

• destination = source;

• strncpy(destination, source, length);

What is the purpose of the `strcat` function?

• To find the length of a string.

• To split a string into characters.

• To concatenate two strings.

• To convert a string to uppercase.

How do you compare two strings in C?

• Use strcmp(string1, string2) to compare two strings.

• Check if string1 == string2 for comparison.

• Use str_compare(string1, string2) to compare two strings.

• Use string1.equals(string2) to compare two strings.

What is a null terminator and why is it important in strings?

• A null terminator is a type of string variable.

• A null terminator is a character that marks the end of a string, crucial for string manipulation in languages like C.

• A null terminator is used to initialize arrays in C.

• A null terminator is a special function for string comparison.

Write a user-defined function to reverse a string.

• def reverse_string(s): return s[::-1]

• def reverse_string(s): return s[1:][::-1]

• def reverse_string(s): return ''.join(reversed(s))

• def reverse(s): return s.reverse()

How can you convert a character array to a string in C?

• Use strcat(destinationString, sourceCharArray);

• Use strcpy(destinationString, sourceCharArray);

• Use memcpy(destinationString, sourceCharArray, sizeof(sourceCharArray));

• Use sprintf(destinationString, sourceCharArray);