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.
The function ________ is used to copy one string to another in C.
- compare()
- length()
- strcpy()
- swap()
In C, the function strcpy() is used to copy one string to another. It takes two string arguments and copies the contents of the source string to the destination string until it encounters a null character.
Which sorting algorithm is most efficient when dealing with small datasets or partially sorted data?
- Bubble Sort
- Insertion Sort
- Merge Sort
- Quick Sort
Insertion Sort is efficient for small datasets and partially sorted data due to its simplicity and low overhead.
Which operator is used to access the value stored at the address specified by a pointer?
- &
- *
- ->
- .
The '*' operator in C is used to access the value stored at the address specified by a pointer. It is also known as the dereference operator. The '&' operator is used to get the address of a variable, not the value.
The data type ________ is used in C to store a single character.
- char
- character
- double
- int
In C, the 'char' data type is used to store a single character. It can hold a single character, such as a letter or a symbol, within single quotes.
How are the members of a structure accessed in C?
- By using the arrow (->) operator
- By using the dollar sign ($)
- By using the dot (.) operator
- By using the exclamation mark (!)
In C, structure members are accessed using the dot (.) operator. This allows you to access the individual fields within a structure.
You are debugging a C program and notice that a variable intended to store large numbers is not holding the values correctly. What might be the issue with the data type used?
- The issue might be with using an int data type.
- The issue might be with using a float data type.
- The issue might be with using a double data type.
- The issue might be with using a short data type.
The correct option is 3. When dealing with large numbers, it's more appropriate to use a double data type because it provides greater precision compared to int and float, which may result in loss of precision for large numbers. short data type is typically used for smaller integers.
What is the purpose of an array in C?
- To create functions
- To perform arithmetic operations
- To store a single value
- To store multiple values of the same data type
The purpose of an array in C is to store multiple values of the same data type in a contiguous memory block, making it easier to work with collections of data.