250+ TOP MCQs on Simple String Template and Answers

This section on C++ interview questions and answers on “Simple String Template”. One shall practice these interview questions to improve their C++ programming skills needed for various interviews (campus interviews, walkin interviews, company interviews), placements, entrance exams and other competitive exams. These questions can be attempted by anyone focusing on learning C++ programming language. They can be a beginner, fresher, engineering graduate or an experienced IT professional. Our C++ interview questions come with detailed explanation of the answers which helps in better understanding of C++ concepts.

Here is a listing of C++ interview questions on “Simple String Template” along with answers, explanations and/or solutions:

1. What is a template?
a) A template is a formula for creating a generic class
b) A template is used to manipulate the class
c) A template is used for creating the attributes
d) A template is used to delete the class
Answer: a
Clarification: Templates are used for creating generic classes to handle different types in single classes.

2. Pick out the correct statement about string template.
a) It is used to replace a string
b) It is used to replace a string with another string at runtime
c) It is used to delete a string
d) It is used to create a string
Answer: b
Clarification: Every string template is used to replace the string with another string at runtime.

3. How to declare a template?
a) tem
b) temp
c) template<>
d) temp()
Answer: c
Clarification: template<> syntax is used.
An example for calculating max of two ints, floats, doubles, or any other number type where T indicates the type of the parameters passes.
template
T max(T a, T b){
return a > b? a : b;
}

250+ TOP MCQs on References – 2 and Answers

4. What will be the output of the following C++ code?

```
    #include 
```
```
    using namespace std;
```
```
    template <class T>
```
```
    inline T square(T x)
```
```
    {
```
```
        T result;
```
```
        result = x * x;
```
```
        return result;
```
```
    };
```
```
    template <>
```
```
    string square<string>(string ss)
```
```
    {
```
```
        return (ss+ss);
```
```
    };
```
```
    int main()     
```
```
    {
```
```
        int i = 4, ii;
```
```
        string ww("A");
```
```
        ii = square<int>(i);
```
```
        cout << i << ii;
```

        cout << square<string>(ww) << endl;

```
    }
```

a) 416AA
b) 164AA
c) AA416
d) AA41A
Answer: a
Clarification: In this program, We are using two template to calculate the square and to find the addition.
Output:

$ g++ tem.cpp
$ a.out
416AA

5. What will be the output of the following C++ code?

```
    #include 
```
```
    using namespace std;
```
```
    template <typename T, typename U>
```
```
    void squareAndPrint(T x, U y)
```
```
    {
```
```
        cout << x << x * x << endl;
```

        cout << y << " " << y * y << endl;

```
    };
```
```
    int main()
```
```
    {
```
```
        int ii = 2;
```
```
        float jj = 2.1;
```

        squareAndPrint<int, float>(ii, jj);

```
    }
```

   23
   2.1 4.41

   24
   2.1 4.41

   24
   2.1 3.41

d) 2.1 3.41
Answer: b
Clarification: In this multiple templated types, We are passing two values of different types and producing the result.
Output:

$ g++ tem1.cpp
$ a.out
24
2.1 4.41

b) 5.5
c) Hello World
d) Hello
Answer: a
Clarification: In this program, We are passing the value to the template and printing it in the template.
Output:

250+ TOP MCQs on Simple String Template and Answers

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