What does the function \[ ext{strcpy} \] do in the context of 2D arrays? Copies a string into another string Concatenates two strings Calculates the length of a string Compares two strings

Copies a string into another string

How can you efficiently store multiple strings in a 2D array? Use a matrix with each row as a string Store each character in a separate array Use a single-dimensional array Concatenate all strings into one

Use a matrix with each row as a string

Which of the following statements is true regarding \[ ext{strcpy} \] in 2D arrays? It appends one string to another It requires the destination string to be large enough It compares two strings It calculates the length of the source string

It requires the destination string to be large enough

What is a potential issue when using \[ ext{strcat} \] in 2D arrays? Buffer overflow if the destination string is too small Inability to handle null characters Incorrect comparison of strings Incorrect length calculation

Buffer overflow if the destination string is too small

When using \[ ext{strlen} \], what value does it return? The number of characters including the null terminator The number of characters excluding the null terminator The number of words in the string The length of the longest word

The number of characters excluding the null terminator

How is memory typically allocated for each string in a 2D string array? Using a single call to malloc() for the entire 2D array Using malloc() for each row, then for each string Using calloc() for each string Using realloc() for adjusting memory size

Using malloc() for each row, then for each string

What is the primary difference between malloc() and calloc()? malloc() initializes memory to zero calloc() initializes memory to zero malloc() allocates multiple blocks calloc() allocates a single block

calloc() initializes memory to zero

Which of the following can help prevent memory fragmentation? Using realloc() frequently Allocating large contiguous blocks Freeing memory blocks immediately after use Using static memory allocation

Allocating large contiguous blocks

What is a 2D string array in C typically used for? Storing numbers in matrix form Manipulating image data Handling strings in row-column format Performing numerical computations

Handling strings in row-column format

What does the 'malloc' function return? A pointer to the allocated memory The size of allocated memory An integer indicating success Nothing

A pointer to the allocated memory

What does 'calloc' do differently compared to 'malloc'? Initializes allocated memory to zero Allocates more memory Returns a void pointer Frees memory

Initializes allocated memory to zero

What is a common cause of memory fragmentation? Frequent allocation and deallocation Using large arrays Using static arrays Compiling the code

Frequent allocation and deallocation

What is the purpose of 'realloc' in memory management? To resize previously allocated memory To allocate memory To free memory To initialize memory

To resize previously allocated memory

Which of the following correctly allocates memory for a 2D array of strings? char **array = malloc(rows * sizeof(char *)); char *array = malloc(rows * sizeof(char *)); char **array = malloc(columns * sizeof(char)); char array = malloc(rows * sizeof(char *));

char **array = malloc(rows * sizeof(char *));

How can memory leaks be prevented in 2D string arrays? By using malloc only By not using dynamic allocation By ensuring each malloc has a corresponding free By using realloc instead of malloc

By ensuring each malloc has a corresponding free

Which of the following statements about calloc is true? It allocates memory but does not initialize it It initializes allocated memory to zero It reallocates memory without changing its contents It frees memory

It initializes allocated memory to zero

What is memory fragmentation in the context of 2D arrays? Unused memory scattered in small blocks Memory fully utilized Efficient memory allocation Allocated memory is contiguous

Unused memory scattered in small blocks

Which technique helps minimize memory fragmentation? Using realloc frequently Using large contiguous memory blocks Allocating small memory blocks Not using free

Using large contiguous memory blocks

What is the primary challenge when storing multiple C-strings in a 2D array? Determining the length of each string Managing memory allocation for each string Ensuring null-termination for each string Traversing the array efficiently

Ensuring null-termination for each string

How can you safely copy a C-string into an element of a 2D array? Using strncpy() to limit the number of characters Using strcpy() without checking length Directly using pointer arithmetic Assigning each character manually

Using strncpy() to limit the number of characters

What is a typical method for traversing all strings in a 2D array of C-strings? Using a single loop over the entire array Using nested loops for rows and columns Using recursion to handle string traversal Using string functions like strlen() in a loop

Using nested loops for rows and columns

How do you determine the number of C-strings stored in a 2D array? Counting null pointers Using strlen() on each row Using a separate count variable Checking for empty strings

Using a separate count variable

What is a C-string in the context of C programming? A sequence of characters terminated by a null character A data type for storing integers A function for input/output operations A special type of loop in C

A sequence of characters terminated by a null character

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