How Strings Work Differently Across Languages in DSA C - Code Step by Step

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a string in C.

DSA C

char str[] = [1];

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A"Hello";

B'Hello'

CHello

D"Hello"

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes for strings

Not enclosing the string in quotes

Adding a semicolon inside the quotes

In C, strings are declared as arrays of characters enclosed in double quotes.

2fill in blank

medium

Complete the code to print the string using printf.

DSA C

printf([1], str);

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A%d

B%s

C%c

D%f

Attempts:

3 left

💡 Hint

Common Mistakes

Using %c which prints only one character

Using %d or %f which are for numbers

The %s format specifier is used to print strings in C.

3fill in blank

hard

Fix the error in copying a string using strcpy.

DSA C

char dest[20];
strcpy(dest, [1]);

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Asource

Bstrcpy

C"source"

Ddest

Attempts:

3 left

💡 Hint

Common Mistakes

Using destination as source

Using string literal instead of variable

The second argument to strcpy should be the source string variable, not the destination or a string literal.

4fill in blank

hard

Fill both blanks to create a loop that prints each character of a string until the null character.

DSA C

int i = 0;
while (str[i] [1] '\0') {
    printf("%c", str[i]);
    i[2];
}

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A!=

B==

C++

D--

Attempts:

3 left

💡 Hint

Common Mistakes

Using == instead of !=

Decrementing i instead of incrementing

The loop continues while the character is not the null character '\0'. The index i is incremented each time.

5fill in blank

hard

Fill all three blanks to create a function that returns the length of a string.

DSA C

int string_length(char *str) {
    int [1] = 0;
    while (str[[2]] != [3]) {
        length++;
    }
    return length;
}

Drag options to blanks, or click blank then click option'

Alength

Bi

C'\0'

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names

Not checking for '\0' correctly

We use a variable length initialized to 0, check characters until the null character '\0', and increment length.