C++ Questions

Q:

What is the difference between stack and array?

Answer

Stack:


 - Stack is a ordered collection of items


 - Stack is a dynamic object whose size is constantly changing as items are pushed and popped .


 - Stack may contain different data types


Array:


- Array is an ordered collection of items


- Array is a static object i.e. no of item is fixed and is assigned by the declaration of the array


- It contains same data types.

Report Error

View answer Workspace Report Error Discuss

Subject: C++ - Technology Exam Prep: GATE

23 10303
Q:

What is function prototyping? What are its advantages?

Answer

Function prototyping is a function declaration statement that tells the compiler about the return type of the function and the number as well as type of arguments required by the function at the time of calling it.


Syntax:


return_type function_name( type1 arg1, type 2 arg2, ... );


 


Advantages of function prototype :


- It helps the compiler in determining whether a function is called correctly or not. Each time when a function is called, its calling statement is compared with its prototype. In case of any mismatch, compiler reports an error.


- A function must be defined before calling it. But prototyping allows a function to be called before defining it.

Report Error

View answer Workspace Report Error Discuss

Subject: C++ - Technology

21 10190
Q:

Which is more effective while calling the functions?

A) call by value B) call by reference
C) call by pointer D) none
 
Answer & Explanation Answer: B) call by reference

Explanation:

In the call by reference, it will just copy the address of the variable to access it, so it will reduce the memory in accessing it.

Report Error

View Answer Workspace Report Error Discuss

Filed Under: C++ - Technology

0 7564
Q:

How many types of modularization are there in c++?

A) 4 B) 3
C) 1 D) none of these
 
Answer & Explanation Answer: D) none of these

Explanation:

There are two types of modular programming.They are interface and implementation.

Report Error

View Answer Workspace Report Error Discuss

Filed Under: C++ - Technology

3 6340
Q:

What is the Standard Template Library?

Answer

A library of container templates approved by the ANSI committee for inclusion in the standard C++ specification. A programmer who then launches into a discussion of the generic programming model, iterators, allocators, algorithms, and such, has a higher than average understanding of the new technology that STL brings to C++ programming

Report Error

View answer Workspace Report Error Discuss

Subject: C++ - Technology
Job Role: Software Architect

0 6253
Q:

In tree construction which is the suitable efficient data structure?

A) Array B) Linked list
C) Stack D) Queue
 
Answer & Explanation Answer: B) Linked list

Explanation:

Linked list is the efficient datastructure in tree construction

Report Error

View Answer Workspace Report Error Discuss

Filed Under: C++ - Technology

0 5955
Q:

What is meaning of following declaration?
int(*p[5])();

A) p is pointer to function. B) p is array of pointer to function.
C) p is pointer to such function which return type is array. D) p is pointer to array of function.
 
Answer & Explanation Answer: B) p is array of pointer to function.

Explanation:
Report Error

View Answer Workspace Report Error Discuss

Filed Under: C++ - Technology

2 5737
Q:

What is the default return type of a function ?

A) int B) void
C) float D) char
 
Answer & Explanation Answer: B) void

Explanation:
Report Error

View Answer Workspace Report Error Discuss

Filed Under: C++ - Technology

7 5287