C++ Interview Questions - 20

1. What will happen when the handler is not found for an exception?

A. L prefix

B. l prefix

C. W prefix

D. none of the mentioned

Correct Answer is : L prefix

2. What will happen when we move to try block far away from catch block?

A. To modify the data whenever required

B. To destroy an object

C. To initialize the data members of an object when it is created

D. To call private functions from the outer world

Correct Answer is : To initialize the data members of an object when it is created

3. What will happen if an exception that is thrown may cause a whole load of objects to go out of scope?

A. Because user may forget to call init() using that object leading segmentation fault

B. Because user may call init() more than once which leads to overwriting values

C. Because user may forget to define init() function

D. All of the mentioned

Correct Answer is : All of the mentioned

4. What operation can be performed by destructor?

A. 5

B. 55

C. Error

D. Segmentation Fault

Correct Answer is : Error

5. What is the main purpose of the constructor?

A. 1

B. 2

C. 3

D. 4

Correct Answer is : 3

6. Which type of program is recommended to include in try block?

A. To modify the data whenever required

B. To destroy an object when the lifetime of an object ends

C. To initialize the data members of an object when it is created

D. To call private functions from the outer world

Correct Answer is : To destroy an object when the lifetime of an object ends

7. Which statement is used to catch all types of exceptions?

A. A(){}

B. ~A(){}

C. A::A(){}

D. ~A(){};

Correct Answer is : ~A(){}

8. Which of the following is used to create an output stream?

A. A a(5);

B. A a;

C. A a = A(5);

D. A a = A();

Correct Answer is : A a = A(5);

9. Which of the following is used to create a stream that performs both input and output operations?

A. Default constructor

B. Assignment constructor

C. Copy constructor

D. All of the mentioned

Correct Answer is : All of the mentioned

10. Which of the following is not used as a file opening mode?

A. When an object of the class is returned by value

B. When an object of the class is passed by value to a function

C. When an object is constructed based on another object of the same class

D. All of the mentioned

Correct Answer is : All of the mentioned

11. Which of the following statements are correct? 1) It is not possible to combine two or more file opening mode in open() method. 2) It is possible to combine two or more file opening mode in open() method. 3) ios::in and ios::out are input and output file opening mode respectively.

A. Constructor called

B. Nothing printed

C. Error

D. Segmentation fault

Correct Answer is : Error

12. By default, all the files in C++ are opened in _________ mode.

A. Constructor called

B. Nothing printed

C. Error

D. Segmentation fault

Correct Answer is : Nothing printed

13. What is the use of ios::trunc mode?

A. 1010

B. 87368746

C. Error

D. Segmentation fault

Correct Answer is : 1010

14. Which of the following is the default mode of the opening using the ofstream class?

A. 10

B. Compile time error

C. Run-time error

D. No output

Correct Answer is : Compile time error

15. What is the return type open() method?

A. 10

B. 100

C. 1

D. Error

Correct Answer is : 10

16. Which of the following is not used to seek file pointer?

A. Constructor called

B. Nothing printed

C. Error

D. Segmentation fault

Correct Answer is : Nothing printed

17. Which of the following is the default mode of the opening using the ifstream class?

A. Constructor called

B. Nothing printed

C. Error

D. Segmentation fault

Correct Answer is : Constructor called

18. Which operator is used to insert the data into file?

A. By changing the number of parameters

B. By changing the parameters type

C. By changing both the number of parameters and their type

D. No chance for destructor overloading

Correct Answer is : No chance for destructor overloading

19. Which function is used to position back from the end of file object?

A. Destructors can be virtual

B. There can be more than one destructor in a class

C. Destructor definition starts with !

D. Destructor is used to initialize objects

Correct Answer is : Destructors can be virtual

20. How many objects are used for input and output to a string?

A. 1

B. 2

C. 3

D. 4

Correct Answer is : 3

C++ interview questions part 20

C++ interview questions part 20

Take as many assements as you can to improve your validate your skill rating

Total Questions: 20

1. What will happen when the handler is not found for an exception?

2. What will happen when we move to try block far away from catch block?

3. What will happen if an exception that is thrown may cause a whole load of objects to go out of scope?

4. What operation can be performed by destructor?

5. What is the main purpose of the constructor?

6. Which type of program is recommended to include in try block?

7. Which statement is used to catch all types of exceptions?

8. Which of the following is used to create an output stream?

9. Which of the following is used to create a stream that performs both input and output operations?

10. Which of the following is not used as a file opening mode?

11. Which of the following statements are correct? 1) It is not possible to combine two or more file opening mode in open() method. 2) It is possible to combine two or more file opening mode in open() method. 3) ios::in and ios::out are input and output file opening mode respectively.

12. By default, all the files in C++ are opened in _________ mode.

13. What is the use of ios::trunc mode?

14. Which of the following is the default mode of the opening using the ofstream class?

15. What is the return type open() method?

16. Which of the following is not used to seek file pointer?

17. Which of the following is the default mode of the opening using the ifstream class?

18. Which operator is used to insert the data into file?

19. Which function is used to position back from the end of file object?

20. How many objects are used for input and output to a string?

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