Master Generic Programming with C++ Templates: Interactive Learning Quizzes

Question 1

Which key benefit does template specialization offer in C++ programming?

Accepted Answer

Optimized code performance

Answer

Smaller code size

Answer

Easier template use

Question 2

Which of the following best describes template parameters?

Accepted Answer

They represent placeholders for data types that can be specified when using the template

Answer

They are fixed data types that cannot be changed once defined

Answer

They allow functions to accept a range of input types

Answer

They are used to create new data types

Question 3

What is the correct syntax for declaring a template function in C++?

Accepted Answer

template <typename T> T function_name(T a, T b);

Answer

T template <typename T> function_name(T a, T b);

Answer

template (typename T) T function_name(T a, T b);

Answer

function_name(T template) { ... };

Question 4

When would it be appropriate to use a class template?

Accepted Answer

When you want to create a class that can work with different data types

Answer

When you want to inherit from a base class and add additional functionality

Answer

When you need to define member functions with different implementations

Answer

When you want to store data in a structured manner

Question 5

What is template specialization in C++?

Accepted Answer

Providing a customized implementation for specific template instantiations

Answer

Overloading a template function with different parameters

Answer

Creating a new template based on an existing template

Answer

Using a template with a particular data type

Question 6

Which of the following is NOT a valid template argument?

Accepted Answer

const

Answer

int

Answer

double

Answer

struct

Question 7

Which of the following is a potential drawback of using templates in C++?

Accepted Answer

Increased code complexity

Answer

Improved code readability

Answer

Reduced code efficiency

Answer

Diminished type safety

Question 8

How do class templates differ from function templates?

Accepted Answer

Class templates can instantiate objects, unlike function templates

Answer

Function templates can instantiate objects, unlike class templates

Answer

Both class templates and function templates can instantiate objects

Answer

Neither class templates nor function templates can instantiate objects

Question 9

Which option demonstrates a template specialization?

Accepted Answer

template <> class List {}

Answer

template <typename T> class List {}

Answer

template <typename T> T max(T, T)

Answer

template List createList()

Question 10

Consider the following template: template <typename T> T max(T a, T b); What will be the return type of the 'max' function if instantiated with arguments of type 'int'?

Accepted Answer

int

Answer

float

Answer

double

Answer

void

Question 11

Which of the following is NOT a valid data type that can be used as a template parameter?

Accepted Answer

Arrays

Answer

Primitive data types

Answer

User-defined types

Answer

Pointers

Question 12

What is the fundamental difference between a class template and a function template?

Accepted Answer

Class templates generate new classes, while function templates generate new functions.

Answer

Function templates generate new classes, while class templates generate new functions.

Answer

There is no difference between class templates and function templates.

Answer

Class templates are more versatile than function templates.

Question 13

What is the primary purpose of using a template class in C++?

Accepted Answer

To create a class that can operate on data of different types

Answer

To improve the performance of code

Answer

To reduce code duplication

Answer

To enhance the security of code

Question 14

What is the correct syntax to define a C++ template function?

Accepted Answer

template <typename T> T functionName(T param1, T param2);

Answer

template T functionName(T param1, T param2);

Answer

T template functionName<T>(T param1, T param2);

Answer

functionName template<T>(T param1, T param2);

Question 15

What is the difference between a template parameter and a template argument in C++?

Accepted Answer

A template parameter specifies the type, while a template argument provides the actual type.

Answer

A template argument specifies the type, while a template parameter provides the actual type.

Answer

They are the same thing.

Answer

There is no difference.

Question 16

Which of the following is a valid example of template specialization in C++?

Accepted Answer

template <> class MyClass {...};

Answer

template <bool> class MyClass {...};

Answer

template specialized MyClass<int> {...};

Answer

class MyClass<int> {...};

Question 17

What is a key advantage of using template metaprogramming in C++?

Accepted Answer

Ability to perform computations and generate code at compile time

Answer

Improved code execution speed

Answer

Reduced code size

Answer

Increased code security

Question 18

In C++ templates, which parameter type specifies the data type the template will operate on?

Accepted Answer

Type parameter

Answer

Non-type parameter

Answer

Template parameter

Answer

Function parameter

Question 19

What is a key advantage of using templates in C++?

Accepted Answer

Increased code reusability

Answer

Improved code clarity

Answer

Reduced memory consumption

Answer

Accelerated program execution

Question 20

Which of the following is a key benefit of using templates in C++?

Accepted Answer

Templates promote code reusability and enhance code efficiency by eliminating the need for duplicate code for different data types.

Answer

Templates reduce memory usage.

Answer

Templates improve the readability of code.

Answer

Templates increase the complexity of code.

Question 21

What is the fundamental difference between a template parameter and a function parameter?

Accepted Answer

A template parameter defines the type of data the template will operate on, while a function parameter defines the specific data being passed to the function.

Answer

There is no difference between them.

Question 22

Which of the following code snippets demonstrates valid template specialization syntax in C++?

Accepted Answer

template <> class Queue {...};

Answer

template <T, U> class Queue {...};

Answer

template <int size> class Queue {...};

Answer

template class Queue<double>;

Question 23

What is the role of the 'typename' keyword in template declarations?

Accepted Answer

The 'typename' keyword is used to indicate that a template parameter represents a type, rather than a value.

Answer

The 'typename' keyword prevents the compiler from performing type checking on template parameters.

Answer

The 'typename' keyword allows template parameters to accept any data type.

Question 24

What is the primary distinction between a class template and a function template in C++?

Accepted Answer

A class template defines a generic class, while a function template defines a generic function.

Answer

A class template can only be used to create new classes, while a function template can be used to create both classes and functions.

Answer

There is no difference between them.

Question 25

Which keyword is used to define a template in C++?

Accepted Answer

template

Answer

class

Answer

function

Question 26

What is the purpose of using templates in C++?

Accepted Answer

To create generic code that can work with different data types without duplication.

Answer

To improve code efficiency.

Answer

To reduce memory usage.

Question 27

What is the fundamental difference between a class template and a function template?

Accepted Answer

A class template creates new classes at compile-time, while a function template generates new functions.

Answer

Function templates are more widely used than class templates.

Answer

Class templates are more efficient than function templates.

Question 28

Which of the following illustrates a template specialization?

Accepted Answer

template<> class MyClass { ... };

Answer

class MyClass { ... };

Answer

typedef MyClass<int> MyIntClass;

Answer

template<typename T> class MyClass { ... };

Question 29

What is the primary advantage of using the auto keyword with templates?

Accepted Answer

It simplifies code, improves readability, and reduces the probability of errors.

Answer

It enhances code performance.

Answer

It enables template specialization without explicit template parameters.

Answer

It increases flexibility when working with different data types.

Question 30

What is the primary purpose of the typename keyword in template parameters?

Accepted Answer

To specify that the parameter represents a type

Answer

To specify that the parameter is a constant

Answer

To prevent the compiler from performing type deduction

Answer

To specify the type of the template argument

Question 31

In C++, which keyword is used to introduce a template?

Accepted Answer

template

Answer

generic

Answer

auto

Answer

define

Question 32

What is the primary purpose of utilizing templates in C++?

Accepted Answer

To create generic code that can operate with various data types.

Answer

To prevent code duplication.

Answer

To improve program efficiency.

Answer

To enhance code's readability.

Question 33

Can you explain the distinction between a template parameter and a function parameter?

Accepted Answer

A template parameter represents a data type, whereas a function parameter represents a specific value.

Answer

A template parameter is defined within a class, whereas a function parameter is defined outside a class.

Answer

A template parameter establishes new data types, whereas a function parameter transmits data to a function.

Answer

There is no distinction between template and function parameters.

Question 34

What is the concept of template specialization in C++?

Accepted Answer

Providing a customized implementation for a template with specific template arguments.

Answer

Specializing a template for a particular data type.

Answer

Redefining an existing template.

Answer

Creating a new template with a distinct name.

Question 35

Which of the following represents a valid template instantiation?

Accepted Answer

vector<int> intVector;

Answer

vector someVector<int>;

Answer

vector intVector<10>;

Answer

vector<T> someVector;

Question 36

What is the significance of the 'typename' keyword in C++ templates?

Accepted Answer

To declare that a template parameter represents a type.

Answer

To define a new data type.

Answer

To prevent the template from modifying the data type it uses.

Answer

To specify the type of a function parameter.

Question 37

Which of the following is an example of a class template in C++?

Accepted Answer

template <typename T> class Array { ... };

Answer

class Array<T> { ... };

Answer

template class Array { ... };

Answer

class Array { ... };

Question 38

What is the advantage of using 'const' in template parameters?

Accepted Answer

To prevent the template from altering the data type it operates on.

Answer

To make the template more flexible.

Answer

To enhance code performance.

Answer

To improve code readability.

Question 39

Can you define a template in C++ in your own words?

Accepted Answer

A blueprint for generating classes, functions, and other entities that can handle various data types.

Answer

A pre-written code snippet that can be effortlessly inserted into any program.

Answer

A complex programming technique used to enhance code efficiency.

Answer

A specialized data structure that organizes data in a specific manner.

Question 40

What is the proper syntax for declaring a template function in C++?

Accepted Answer

template <typename T> T functionName(T parameter);

Answer

template T functionName(T parameter);

Answer

template functionName<T>(T parameter);

Answer

T template functionName(T parameter);

Question 41

In template declarations, what does the 'typename' keyword indicate?

Accepted Answer

That the template parameter is a data type.

Answer

That the template parameter is a variable.

Answer

That the template parameter is a constant.

Answer

That the template parameter is a function.

Question 42

Consider the code: template <typename T> void swapValues(T& a, T& b). What functionality does this template provide?

Accepted Answer

Swaps the values of two variables of the same data type.

Answer

Compares the values of two variables of the same data type.

Answer

Converts the values of two variables to a specific data type.

Answer

Creates new variables for a specified data type.

Question 43

Which option correctly defines a template class?

Accepted Answer

template <typename T> class MyClass { ... };

Answer

class MyClass template <typename T> { ... };

Answer

template MyClass<T> { ... };

Answer

class template <typename T> MyClass { ... };

Question 44

In template class declarations, what is the purpose of the 'class' keyword?

Accepted Answer

To define a template that generates new classes with varying data types.

Answer

To create a new class with a specific data type.

Answer

To inherit from an existing class with a specific data type.

Question 45

Given a template class: template <typename T> class Vector { ... }; How do you instantiate an object of this template?

Accepted Answer

Vector<data_type> objectName;

Answer

Vector = new Vector<data_type>();

Answer

objectName = new Vector<data_type>();

Answer

data_type objectName = Vector<data_type>;

Question 46

Which of the following is a limitation of templates in C++?

Accepted Answer

Templates cannot be used with non-type parameters.

Answer

Templates cannot be used with inheritance.

Answer

Templates cannot be used with function members.

Answer

Templates cannot be used with multiple parameters.

Question 47

Explain the fundamental difference between class templates and function templates.

Accepted Answer

Class templates generate new classes for various data types, while function templates create functions for various data types.

Answer

Class templates create functions for various data types, while function templates create new classes for various data types.

Question 48

What is the primary reason for using templates in C++?

Accepted Answer

To write generic code that functions with various data types.

Answer

To improve code organization and readability.

Answer

To enhance program execution speed.

Question 49

Consider the code: `template <typename T> T maximum(T a, T b) { return (a > b) ? a : b; }`. With which data types can the `maximum` function be used?

Accepted Answer

Any data type that supports the '>' operator.

Answer

Only floating-point data types.

Answer

Only integer data types.

Answer

Only custom data types.

Question 50

Define template instantiation.

Accepted Answer

The process of generating a specific version of a template for a particular data type.

Answer

The process of creating a template from an existing function or class.

Answer

The process of invoking a template function or utilizing a template class.

Question 51

What is the purpose of the `typename` keyword in a template declaration?

Accepted Answer

To indicate that the parameter is a type.

Answer

To ensure type safety during template instantiation.

Answer

To differentiate between a template parameter and a regular parameter.

Answer

To specify the data type of the template parameter.

Question 52

Why are templates considered a powerful tool for generic programming?

Accepted Answer

They allow you to write reusable code that works with different data types without code duplication.

Answer

They make code more efficient by reducing memory usage.

Answer

They simplify the process of debugging code.

Question 53

You need to write a function that calculates the average of a list of numbers. The list can contain integers, floating-point numbers, or even user-defined data types that have an overloaded '+' operator. What would be the most appropriate approach to implement this function?

Accepted Answer

Use a function template to handle different data types.

Answer

Write separate functions for each data type.

Answer

Use type casting to convert all data types to a common type.

Question 54

Which of the following statements about template specialization is TRUE?

Accepted Answer

Template specialization allows you to provide a specific implementation for a template when a particular data type is used.

Answer

Template specialization is only possible for class templates, not function templates.