What is the significance of using pointers in function arguments?
- It allows passing arguments by reference
- It enforces strong typing
- It reduces code readability
- It simplifies function declarations
Using pointers in function arguments allows passing arguments by reference, meaning the function can modify the original data, not just a copy. This is valuable when you want a function to modify variables from the caller's scope.
In a 'switch' statement, the ________ keyword is used to specify the code to execute if none of the cases match.
- Break
- Continue
- Default
- Exit
The correct option is (c) Default. In a 'switch' statement in C, the 'default' keyword is used to specify the code to execute if none of the cases match the provided value. It acts as a fallback option.
What might be a reason to use bit fields when designing a system with strict memory constraints?
- They allow more precise control over memory usage
- They improve code performance
- They offer greater data integrity
- They simplify code logic
Bit fields can be useful in systems with strict memory constraints because they allow more precise control over memory usage by packing data in smaller units.
The function fopen in C opens a file and returns a pointer of type ________.
- FILE*
- char*
- double
- int
In C, the fopen function is used to open a file and returns a pointer of type FILE*, which represents the file stream.
The size of a structure in memory is determined by the ________ of its members.
- maximum
- minimum
- sum
- total
The size of a structure in memory is determined by the total size of its members. This includes the size of all individual data members within the structure.
Using the ________ keyword before a function suggests to the compiler that the function should be expanded at the point where it is called.
- Dynamic
- Inline
- Static
- Virtual
The "inline" keyword suggests to the compiler that the function should be expanded at the call site for performance optimization.
What is the significance of the SEEK_SET, SEEK_CUR, and SEEK_END constants in file handling?
- File attributes
- File permissions
- File positioning
- File type
In file handling, the SEEK_SET, SEEK_CUR, and SEEK_END constants are used to define the reference point for file positioning. SEEK_SET sets the file position from the beginning of the file, SEEK_CUR sets it relative to the current position, and SEEK_END sets it relative to the end of the file. These constants are crucial for accurate file positioning and seeking within files.
In C, to close a file opened by fopen, the function ________ is used.
- close
- fclose
- fflush
- remove
In C, the fclose function is used to close a file that was opened with fopen. It's essential to free resources and ensure data is written.
When working with large datasets, using pointers to structures can help in reducing ________ overhead.
- Computational
- Memory
- Processing
- Storage
Pointers to structures in C can help reduce memory overhead, as they allow for more efficient memory management and allocation, especially when dealing with large datasets.
The ________ function is used to move the file pointer to a specified position in a file.
- moveptr()
- fseek()
- setposition()
- positionfile()
The correct option is b) fseek(). This function in C is used to move the file pointer to a specified position in the file. It takes the file pointer, offset, and origin as arguments.