You're working on an application that processes large datasets. Why might you choose to use pointers to arrays instead of traditional arrays?
- Pointers to arrays allow for dynamic memory allocation, which is essential when the dataset size is unknown or can change.
- Pointers to arrays enable safer data access, reducing the risk of buffer overflows.
- Pointers to arrays provide better performance due to reduced memory overhead.
- Pointers to arrays simplify memory management by automatically releasing memory when no longer needed.
When dealing with large datasets, it is often more practical to use pointers to arrays to allocate memory dynamically, especially when the dataset size is not known in advance. This ensures efficient memory usage. Traditional arrays have a fixed size, which may not be suitable for large datasets.
What is the advantage of using function pointers in C for implementing callback functions?
- Allows dynamic callback selection
- Enhances code modularity
- Reduces code redundancy
- Simplifies debugging
Function Pointers allow dynamic selection of callback functions in C, which is useful in scenarios where you need to change callbacks at runtime without modifying the main code. It reduces code redundancy and enhances code modularity, but it might make debugging more challenging due to indirection.
What is the purpose of using pointers to structures in C programming?
- To access structure members
- To create a new structure
- To declare a structure
- To store an integer
Pointers to structures are used to access and manipulate individual members of a structure.
Which looping construct is best suited when the number of iterations is known beforehand?
- do-while
- for
- switch
- while
The 'for' loop is commonly used when the number of iterations is known beforehand, as it allows you to specify the initialization, condition, and iteration steps in a compact manner.
The keyword ________ is used to define a structure in C.
- allocate
- define
- struct
- typedef
In C, the "struct" keyword is used to define a structure. Structures are used to group related data members under a single name.
The function ________ is used to move the file pointer to a specific position in the file.
- file_seek()
- fseek()
- move_pointer()
- position_file()
In file handling, fseek() is employed to move the file pointer to a specified position within the file. This is crucial for navigating and accessing specific parts of a file during read or write operations.
You're developing a program to calculate the area of a circle. What data type would be most suitable to store the radius, considering it can be a fractional value?
- char
- double
- float
- int
To store the radius of a circle with fractional values, the most suitable data type in C is 'double' as it offers high precision for such calculations.
What is the purpose of using random access in file handling?
- To access files in a random order.
- To create files with random names.
- To generate random numbers for file operations.
- To perform direct read/write operations at any position within the file.
The purpose of using random access in file handling is to perform direct read and write operations at any position within the file. Random access allows you to jump to a specific location in a file and read or write data without having to sequentially process the entire file. It's especially useful for large files or databases.
In a scientific computation program, you need to represent a matrix of real numbers. What kind of array would be suitable for this purpose?
- 1D Array
- 2D Array
- Binary Tree
- Dynamic Array (ArrayList)
A 2D array is suitable for representing a matrix of real numbers as it offers a grid-like structure to store rows and columns of values.
In C, what is the result of the expression (5 & 3)?
- 0
- 1
- 3
- 5
In C, the '&' operator is the bitwise AND operator. When you perform (5 & 3), it bitwise ANDs the binary representation of 5 (0101) and 3 (0011). The result is 0001, which is 1 in decimal.