Why might a developer opt to exclude the "using namespace std;" directive and instead use the "std::" prefix for standard library components?

  • To avoid naming conflicts
  • To improve code readability
  • To increase program execution speed
  • To reduce compilation time
Developers might choose to exclude the "using namespace std;" directive to avoid naming conflicts in large projects. Using the "std::" prefix explicitly indicates that a function or object comes from the C++ Standard Library, which can prevent unintentional naming clashes. While it may make code slightly less concise, it enhances code maintainability and prevents ambiguity.

Which part of a function specifies the return type and the types of parameters?

  • Function Call
  • Function Declaration
  • Function Definition
  • Function Prototype
In C++, the function prototype specifies the return type and the types of parameters a function expects. It provides a declaration of the function's signature, allowing the compiler to check for correct usage throughout the code.

The loop that first checks the condition and then executes its body is called ______.

  • do-while
  • for
  • switch
  • while
The loop that first checks the condition and then executes its body is called a "for loop." In a for loop, you specify the initialization, condition, and increment or decrement all within the loop header. This allows for precise control over loop execution.

Which C++ keyword can be used to define a user-defined data type?

  • class
  • newtype
  • struct
  • typedef
In C++, the 'typedef' keyword is used to define user-defined data types. It allows you to create aliases for existing data types, making your code more readable and maintainable.

Functions in C++ can return multiple values using ______.

  • Pointers
  • References
  • Tuples
  • Arrays
Functions in C++ can return multiple values using tuples. A tuple is an ordered collection of elements, and it's an excellent way to return multiple values from a function. It's more flexible than returning values using pointers, references, or arrays, as it allows you to return values of different types. Tuples were introduced in C++11.

In C++, if you do not provide a return type for a function, it defaults to ______.

  • auto
  • int
  • nullptr_t
  • void
In C++, when a return type is not explicitly provided for a function, it defaults to 'void.' This means the function does not return a value. It's essential when you have functions that perform actions without returning a result, such as void functions for input/output or setting variables.

What happens if the inline function is too long or complex?

  • Improved Performance
  • Increased Code Size
  • No Impact
  • Reduced Code Readability
When an inline function is too long or complex, it can lead to increased code size. This is because the function's code is inserted at each call site, potentially resulting in larger compiled code. However, this may be offset by improved performance due to reduced function call overhead.

If you want to store a sequence of characters, you would typically use a ______.

  • array
  • char
  • double
  • string
In C++, the string data type is used to store a sequence of characters, such as words or sentences. It provides convenient methods for working with text data, unlike other data types like char or int.

The ______ operator is used to check if two operands are equal.

  • !=
  • =
  • ==
  • >=
The "==" operator in C++ is the equality operator, and it is used to check if two operands are equal. It returns true if the operands are equal and false otherwise. This operator is frequently used in conditional statements and comparisons in C++ programs.

In the context of function overloading, what are the possible ambiguities that might arise and how to avoid them?

  • Argument ambiguity
  • Name ambiguity
  • Return type ambiguity
  • Scope ambiguity
Ambiguities in function overloading can occur due to similar argument types. To avoid this, ensure that there is a clear distinction in the number or types of arguments. Return type ambiguity is not relevant since C++ doesn't differentiate functions based on return types.

The presence of default arguments can sometimes lead to ambiguities in _________ resolution.

  • Function Overloading
  • Inheritance
  • Operator Overloading
  • Type Casting
Default argument values can cause ambiguities in function overloading when multiple overloaded functions have similar parameter lists, and it becomes unclear which function should be called.

The process by which the correct function is selected from a set of overloaded functions during compile time is termed as ______.

  • Function Invocation
  • Function Overloading
  • Function Overriding
  • Function Resolution
The process by which the correct function is selected from a set of overloaded functions during compile time is termed as Function Resolution. It is the compiler's job to determine which overloaded function to call based on the arguments provided. This ensures type safety and efficiency in function calls.