You are working on a program that simulates a chessboard. How would you represent the chessboard using arrays?
- 1D Array
- 2D Array
- Hash Table
- Linked List
A chessboard is best represented using a 2D array because it provides a grid structure, allowing easy indexing for each square.
What is the default starting value of an enumeration in C?
- 0
- 1
- The value of the first enumeration constant
- Unspecified
In C, if no initial value is provided for the first enumeration constant, it starts with 0. Subsequent constants increment by 1.
In C, what is the difference in memory allocation between character arrays and string literals?
- Character arrays are automatically null-terminated, while string literals are not.
- Character arrays are stored in read-write memory, while string literals are stored in read-only memory.
- Character arrays cannot be used as function arguments, while string literals can.
- String literals are stored in read-write memory, while character arrays are stored in read-only memory.
Character arrays in C are typically stored in read-write memory, allowing you to modify their contents. In contrast, string literals are stored in read-only memory, making them immutable. This difference in memory allocation is essential for understanding how to work with strings in C.
What is the return type of the strlen function in C?
- char
- int
- size_t
- void
The strlen function in C returns a value of type size_t, which represents the size or length of the string. Using size_t is more appropriate as it can handle large string lengths and is an unsigned integer type.
Enumerations provide a way to assign ________ to a set of named constants.
- data
- functions
- objects
- values
Enumerations allow you to assign integer values to a set of named constants, making your code more readable and maintainable by giving meaningful names to values.
You are tasked with implementing a plugin system in a software application where different plugins can be loaded and executed at runtime. How can function pointers be utilized in this scenario?
- They allow plugins to access the internet.
- They allow plugins to share global variables.
- They enable plugins to call functions in the application.
- They help manage memory allocation for plugins.
Function pointers are used to provide a mechanism for plugins to call specific functions within the application at runtime, enabling extensibility and customization.
How does function overloading in C++ enhance code readability and maintainability?
- It allows functions to have the same name and return type.
- It allows multiple functions with the same name but different parameter types.
- It is not related to code maintainability.
- It reduces code readability by introducing ambiguity.
Function overloading in C++ allows you to define multiple functions with the same name but different parameter types, making the code more readable and expressive. It enables you to use intuitive function names for various versions of a task.
When dealing with large datasets, what is the advantage of using 'long long int' over 'int'?
- Better precision
- Higher range
- No advantage
- Smaller memory usage
When dealing with large datasets, using 'long long int' provides a higher range of values that can be represented, which is useful for large data. It comes at the cost of increased memory usage.
When using pointers to structures, the ________ operator is used to access the members of the structure.
- Arrow (->)
- Asterisk (*)
- Comma (,)
- Period (.)
Pointers to structures are used with the arrow operator (->) to access structure members. The arrow operator is used to dereference the pointer and access the member directly.
How does C++ resolve calls to overloaded functions?
- Overloaded function resolution is based on the function name
- Overloaded function resolution is based on the number and types of parameters
- Overloaded function resolution is based on the return type
- Overloaded function resolution is random
In C++, when there are multiple overloaded functions with the same name, the compiler resolves the calls based on the number and types of parameters provided in the function call. This process is known as function overloading, and it allows C++ to choose the most appropriate function to call based on the arguments provided.