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- Question
Define Structure in C++.?
- Correct Answer
- The C++ programming technique allows defining user defined datatypes through structure The syntax to declare structure is as follows: struct student { char name[100] char address[250] };
- 1. What is function prototype in C++? Discuss
- 2. What is the output of this program? #include using namespace std; void fun(int x, int y) { x = 20; y = 10; } int main() { int x = 10; fun(x, x); cout << x; return 0; }
Options- A. 10
- B. 20
- C. compile time error
- D. none of these Discuss
- 3. What is the output of this program? #include using namespace std; struct sec { int a; char b; }; int main() { struct sec s ={25,50}; struct sec *ps =(struct sec *)&s; cout << ps->a << ps->b; return 0; }
Options- A. 252
- B. 253
- C. 254
- D. 262 Discuss
- 4. What is the output of this program? #include using namespace std; int main() { int arr[] = {4, 5, 6, 7}; int *p = (arr + 1); cout << arr; return 0; }
Options- A. 4
- B. 5
- C. address of arr
- D. 7 Discuss
- 5. What is the difference between class and structure? Discuss
- 6. What do you mean by reference variable in c++? Discuss
- 7. How many ways are there to initialize int with a constant?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 8. What is an explicit constructor? Discuss
- 9. How many ways of reusing are there in class hierarchy?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 10. What is meant by exception specification?
Options- A. A function is limited to throwing only a specified list of exceptions.
- B. A catch can catch all types of exceptions.
- C. A function can throw any type of exceptions.
- D. none of the mentioned Discuss
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Correct Answer: A function prototype is a declaration of a function that omits the function body It specifies the function?s name, argument types and return type Eg int add(int,int)
Correct Answer: 10
Explanation:
In this program, we called by value so the value will not be changed, So the output is 10
Correct Answer: 252
Explanation:
In this program, We are dividing the values of a and b, printing it.
Correct Answer: address of arr
Explanation:
As we couted to print only arr, it will print the address of the array.
Correct Answer: Structure: Initially (in C) a structure was used to bundle different type of data types together to perform a particular functionality But C++ extended the structure to contain functions also The major difference is that all declarations inside a structure are by default public Class: Class is a successor of Structure By default all the members inside the class are private
Correct Answer: A reference variable provides an alias to a previously defined variable Data type & reference-name = variable name
Correct Answer: 2
Explanation:
There are two formats for initializers in C++ as shown in the example that follows. The first format uses the traditional C notation. The second format uses constructor notation.
int foo = 123;
int bar (123);
Correct Answer: A conversion constructor declared with the explicit keyword The compiler does not use an explicit constructor to implement an implied conversion of types It?s purpose is reserved explicitly for construction
Correct Answer: 2
Explanation:
Class hierarchies promote reuse in two ways. They are code sharing and interface sharing.
Correct Answer: A function is limited to throwing only a specified list of exceptions.
Explanation:
C++ provides a mechanism to ensure that a given function is limited to throwing only a specified list of exceptions. It is called as exception specification.
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