In what scenario would using a nested structure be beneficial?
- When you need to hide data
- When you need to represent hierarchical data
- When you need to save memory
- When you need to speed up computation
Using a nested structure in C is beneficial when you need to represent hierarchical data or create complex data structures with multiple levels of nesting.
What is the term used to describe the number of indices needed to select an element in a multidimensional array?
- Array Depth
- Dimensionality
- Index Complexity
- Selection Rank
The term used to describe the number of indices needed to select an element in a multidimensional array is dimensionality. In a multidimensional array, each dimension requires a separate index to access an element.
You're writing a program that needs to efficiently calculate the power of 2 for a given exponent. Which operator would be most efficient to use?
- * (Multiplication)
- ** (Exponentiation)
- << (Left Shift)
- ^ (Bitwise XOR)
The correct answer is C) ** (Exponentiation). To efficiently calculate the power of 2 for a given exponent, you should use the exponentiation operator (**).
The function ________ in C changes the size of the memory block pointed to by a given pointer.
- realloc()
- free()
- malloc()
- calloc()
The correct option is 'realloc()'. The realloc() function is used to change the size of a previously allocated memory block, making it suitable for resizing dynamic arrays.
What will happen if the condition in a 'while' loop is initially false?
- It will enter the loop and execute it once.
- It will enter the loop and run indefinitely.
- It will result in a compile-time error.
- It won't enter the loop.
When the condition in a 'while' loop is initially false, the loop will not execute, and the program will proceed to the next statement.
How does C handle array indices that are out of bounds?
- C dynamically resizes the array
- C ignores out-of-bounds indices
- C throws a runtime error
- C wraps around to the beginning of the array
In C, when array indices are out of bounds, the behavior is undefined. C does not perform any bounds checking, and it's the programmer's responsibility to ensure indices are within bounds to avoid unexpected results.
The ________ keyword in C is used to give a reference to a variable that is already defined in some other scope.
- auto
- extern
- register
- static
In C, the extern keyword is used to give a reference to a variable that is already defined in some other scope. It is often used to access global variables that are defined outside the current function or block. This keyword allows you to use variables across different scopes.
You are developing an interactive application that continuously accepts user input until the user decides to exit. Which loop construct would be most appropriate for this scenario?
- do-while loop
- for loop
- switch statement
- while loop
The most appropriate loop construct for an interactive application that accepts user input until the user decides to exit is a 'while loop.' It allows continuous input acceptance while checking an exit condition.
Function pointers in C can be stored in an array, creating a(n) ________ of function pointers.
- Array of Function Pointers
- Collection
- Group
- List
Function pointers in C can be stored in an array, creating an array of function pointers, which can be used for dynamic function calls.
When you declare an array, what does the number inside the square brackets represent?
- Array's name length
- Index of the last element
- Number of elements in the array
- Total memory allocated to the array
The number inside the square brackets when declaring an array in C represents the number of elements or the size of the array. It indicates how many elements the array can hold.