The use of inline functions can potentially lead to faster execution time but may also increase the ________ of the binary.
- Complexity
- Efficiency
- Size
- Speed
Inline functions can optimize execution time by eliminating the function call overhead. However, they may increase binary complexity due to code expansion, making the binary larger.
When a pointer is incremented, it moves to the memory address of the next element based on the ________ of the data type it points to.
- Color
- Name
- Shape
- Size
Pointer incrementation in C is determined by the size (in bytes) of the data type it points to.
You're optimizing a program for memory usage. What considerations would you take into account when deciding between using character arrays and string literals?
- Character arrays consume less memory than string literals, making them a better choice for memory optimization.
- Character arrays provide better performance due to reduced memory overhead.
- String literals are less efficient in terms of memory usage compared to character arrays.
- String literals are more memory-efficient, as they share storage and avoid duplicating string data.
When optimizing a program for memory usage, you would consider using character arrays over string literals because character arrays generally consume less memory. String literals can lead to duplicate storage, whereas character arrays allow more control over memory usage.
What happens when you perform pointer arithmetic on a pointer to a data type other than 'char'?
- It generates a compilation error
- It increments the pointer by one byte
- It results in undefined behavior
- It returns the size of the data type in bytes
When you perform pointer arithmetic on a pointer to a data type other than 'char,' it results in undefined behavior. This is because the pointer arithmetic depends on the size of the data type, and it may lead to accessing memory incorrectly.
What is the main purpose of using pointers in a C program?
- To allocate memory dynamically
- To create functions
- To perform arithmetic operations
- To store multiple values in a single variable
Pointers in C are used to allocate memory dynamically, which is a crucial feature for managing data efficiently. They allow you to allocate memory as per the program's requirements.
The #undef directive is used to ________ a macro defined by #define.
- declare
- initialize
- redefine
- remove
The #undef directive is used to remove a macro definition created by #define. It essentially "undefines" the macro, making it no longer available for use.
In C, the function ________ is used to allocate memory for an array of elements and initialize them to zero.
- calloc()
- free()
- malloc()
- realloc()
In C, the function calloc() is used to allocate memory for an array of elements and initialize them to zero. Unlike malloc(), it automatically initializes the memory to zero, making it useful for arrays. realloc() is used to resize memory, and free() deallocates memory.
Why might you choose to use an enumeration instead of a series of #define statements for constants?
- #define statements are faster to evaluate
- Enumerations are more memory-efficient
- Enumerations cannot be used for constants
- Enumerations provide type checking
You might choose to use an enumeration instead of a series of #define statements for constants because enumerations provide type checking, making your code more robust and error-prone. #define statements are simple text replacements and do not offer type safety.
Which keyword is used in C to create an alias for a data type?
- enum
- struct
- typedef
- union
In C programming, the "typedef" keyword is used to create an alias or a new name for an existing data type. This makes the code more readable and can help in achieving better code organization.
The preprocessor directive ________ is used to include libraries in a C program.
- #define
- #ifdef
- #include
- #pragma
The correct answer is (b) #include. In C, the #include preprocessor directive is used to include libraries or header files. This allows you to use functions and definitions from those libraries in your program.