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.
The function ________ is used in C to allocate memory for an array of specified size dynamically.
- free
- malloc
- printf
- scanf
In C, the function 'malloc' is used to allocate memory for an array of specified size dynamically. 'malloc' stands for memory allocation.
What is the default value of elements in an array declared as int arr[5]; in C?
- 0
- 5
- Random integers
- Undefined
In C, when you declare an array without initializing it, all its elements are set to 0 by default. Hence, the correct answer is 0.
How is data stored in a two-dimensional array in memory?
- In reverse order
- Randomly, without any order
- Sequentially, row by row
- Vertically, column by column
In a two-dimensional array, data is stored sequentially, row by row. Each row is contiguous in memory, and elements are stored in the order they appear in the row.
What is the primary use of the fseek function in file handling?
- Closing a file
- Moving the cursor to the end of a file
- Moving the file cursor to a specific position
- Setting the file's permissions
The primary use of the fseek() function is to move the file cursor to a specific position within the file. This allows you to read or write data at a specific location in the file.
In a program that processes large volumes of numerical data, which file format would be more efficient in terms of storage space and data retrieval speed?
- Binary File Format
- CSV (Comma-Separated Values)
- JSON (JavaScript Object Notation)
- XML (eXtensible Markup Language)
Binary File Format would be more efficient for large volumes of numerical data. Unlike plain text formats like CSV, binary formats store data in a more compact and direct way, reducing storage space requirements. Additionally, binary files allow for faster data retrieval because they can be read directly into memory without parsing, making them suitable for applications that prioritize speed and efficiency in processing numerical data.
You are tasked with writing a C function to calculate the factorial of a number. Which programming technique would be most suitable for this task?
- Iteration
- Object-Oriented Programming
- Parallel Programming
- Recursion
Iteration is the most suitable technique for calculating the factorial of a number. It avoids the risk of stack overflow associated with recursion and is more efficient for this specific task.
You're working on an application that processes large datasets. Why might you choose to use pointers to arrays instead of traditional arrays?
- Pointers to arrays allow for dynamic memory allocation, which is essential when the dataset size is unknown or can change.
- Pointers to arrays enable safer data access, reducing the risk of buffer overflows.
- Pointers to arrays provide better performance due to reduced memory overhead.
- Pointers to arrays simplify memory management by automatically releasing memory when no longer needed.
When dealing with large datasets, it is often more practical to use pointers to arrays to allocate memory dynamically, especially when the dataset size is not known in advance. This ensures efficient memory usage. Traditional arrays have a fixed size, which may not be suitable for large datasets.
What is the advantage of using function pointers in C for implementing callback functions?
- Allows dynamic callback selection
- Enhances code modularity
- Reduces code redundancy
- Simplifies debugging
Function Pointers allow dynamic selection of callback functions in C, which is useful in scenarios where you need to change callbacks at runtime without modifying the main code. It reduces code redundancy and enhances code modularity, but it might make debugging more challenging due to indirection.