When using typedef to create a function pointer alias, what aspect of the function signature must be included in the alias?
- Function name
- Return type
- Parameter types
- Number of parameters
The correct option is b) Return type. When using typedef to create a function pointer alias, you must include the return type of the function in the alias. This ensures that the alias correctly represents the function pointer's signature, allowing you to use it to declare and call functions.
In the context of searching algorithms, why might a binary search be preferred over a linear search?
- Binary search guarantees to find the target quickly
- Binary search is always faster
- Binary search requires sorted data
- Binary search works for unsorted data
Binary search is preferred when data is sorted as it allows for efficient searching, while a linear search works for unsorted data.
Why might a programmer choose to use an array of structures in a C program?
- To create global variables
- To perform text formatting
- To sort data
- To store related data efficiently
Programmers use arrays of structures to efficiently manage and organize related data.
In the context of file handling, what is the advantage of using binary files over text files?
- Data preservation
- Human readability
- Portability
- Smaller file size
One of the advantages of using binary files over text files in file handling is data preservation. Binary files store data as a sequence of bytes, preserving the exact representation of data without any character encoding or formatting. This makes them suitable for storing complex data structures and preserving data integrity.
Which of the following best describes the concept of recursion in C programming?
- A function calling itself directly or indirectly
- A loop mechanism for repeating a set of instructions
- A method to divide a problem into smaller subproblems
- A way to define constant values
Recursion in C programming involves a function calling itself either directly or indirectly. It's a technique used to solve problems by breaking them down into smaller instances, making it an essential concept in programming.
How does using pointers with arrays affect the performance of a C program?
- It always degrades performance
- It can improve performance in some cases
- It has no effect on performance
- It only affects memory usage, not performance
Using pointers with arrays in a C program can actually improve performance in some cases. By using pointers, you can manipulate array elements more efficiently and access them directly, reducing the overhead of array indexing. This can lead to better performance. However, it's essential to use pointers carefully to avoid issues like memory corruption.
When writing data to a text file, which function is used to ensure that the data is written correctly?
- fprintf
- fputc
- fputs
- fwrite
The fprintf function is used to write formatted data to a text file in C. It allows you to specify the format and data to be written, ensuring that the data is written correctly with appropriate formatting.
The ________ sorting algorithm repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order.
- Binary
- Bubble
- Merge
- Quick
The 'Bubble' sorting algorithm repeatedly steps through the list, comparing adjacent elements, and swapping them if they are in the wrong order. It is a simple sorting algorithm but not very efficient for large datasets.
A ________ occurs when a program continues to use a pointer after it has been freed.
- Buffer Overflow
- Dangling Pointer
- Memory Leak
- Segmentation Fault
A Dangling Pointer occurs when a program continues to use a pointer after it has been freed. This can lead to undefined behavior, crashes, or data corruption. It's crucial to avoid using pointers that point to memory that has been deallocated.
Why would you use a pointer to an array instead of a regular array in a function?
- Pointers allow you to modify the original array in a function.
- Pointers allow you to pass arrays to functions without making a copy.
- Pointers are more memory-efficient than regular arrays.
- Pointers provide a way to dynamically allocate memory for arrays.
Using a pointer to an array in a function allows you to pass the array by reference, avoiding the need to make a copy of the array. This is more memory-efficient and allows you to modify the original array within the function.