What is the purpose of using inline functions in C?
- Enable recursive functions
- Improve code maintainability
- Increase code size
- Reduce function call overhead
Inline functions in C reduce the overhead of function calls, as the code is inserted directly in place of the function call. This can improve performance.
The typedef keyword in C is used to create an ________ for existing data types.
- Alias
- Enumeration
- Function
- Pointer
In C, the typedef keyword is used to create an alias for existing data types, making code more readable and maintainable by providing descriptive names.
What is the relationship between the addresses of consecutive elements in a one-dimensional array?
- Addresses are assigned based on the element's value
- Addresses are the same for all elements
- Consecutive elements have addresses in random order
- Consecutive elements have consecutive addresses
In a one-dimensional array, consecutive elements have consecutive addresses. The address of each element is one unit (e.g., byte) greater than the previous element.
The keyword ________ is used in C to define a constant.
- constant
- define
- identifier
- value
In C, the keyword 'const' is used to define a constant. It is used to declare variables as constant, and their values cannot be changed after declaration.
In a program that processes images, each pixel is represented by three values corresponding to the Red, Green, and Blue (RGB) intensities. What would be an efficient way to represent a pixel in C?
- An efficient way to represent a pixel in C is by using a struct with three integer fields.
- An efficient way to represent a pixel in C is by using a single integer value.
- An efficient way to represent a pixel in C is by using three separate variables.
- An efficient way to represent a pixel in C is by using a character array.
The correct option is 1. Using a struct with three integer fields is the most efficient way to represent a pixel in C because it encapsulates the RGB values as a single unit, making it easy to work with. The other options would be less efficient and less organized.
You are working on a program that needs to perform different actions based on the day of the week. Which control statement would be most appropriate to use?
- for
- if-else
- switch
- while
The correct answer is B) switch. The switch statement is ideal for situations where you want to execute different code blocks based on the value of a variable (in this case, the day of the week).
What is the purpose of the fopen function in C?
- Closes a file
- Opens a file for both reading and writing
- Opens a file for reading
- Opens a file for writing
The fopen function in C is used to open a file for reading. It returns a file pointer that can be used to read data from the file.
Which function is used to display output on the console in C?
- display()
- print()
- printf()
- write()
In C, the 'printf()' function is used to display output on the console.
Which mode should be used with fopen to open a file for both reading and writing?
- "a+"
- "r+"
- "rb+"
- "w+"
To open a file for both reading and writing in C, you should use the "r+" mode with the fopen function. This mode allows you to perform both read and write operations on the file.
How can you redirect error messages in a C program to a file instead of displaying them on the console?
- freopen()
- perror()
- stderr
- stdout
The freopen() function in C is used to redirect standard streams, such as stderr, to a specified file, enabling error messages to be stored in a file instead of the console.