Shenzhen Huawei C ++ interview questions

C ++/MFC Questions

 

I. Fill in blank questions(26Minute)

1.Win32Platform,Sizeof (short) = __2__,Sizeof (INT) = __4__,Sizeof (long) = __4__.(3Minute)

2. Please provide the followingProgramResult(2Minute)

Int A = 3;

Int B = A <3;

A = __3__,B = __24__.

3 . Please The following program results are given:(2Minute)

Int AAA = 0x01;

Htonl (AAA) = _16777216___.// The running result shows 16777216, which may be a random value.

4. Please provide the following program results(2Minute)

# Define max_num 100 + 200

Int ntemp = max_num * 10;

ThenTemp = __2100__.

5. Please provide the following program results(3Minute)

Char sztemp [1000] = "";

Int nlen1 = sizeof (sztemp );

Int nlen2 = strlen (sztemp );

Strcpy (sztemp, "ABC ");

Int nlen3 = sizeof (sztemp );

Int nlen4 = strlen (sztemp );

Int ntemp [100];

Int * ptemp = ntemp;

Int nlen5 = sizeof (ptemp );

Char szresult [200] = "";

Sprintf (szresult, "% d, % 02d.", nlen1, nlen2, nlen3, nlen4, nlen5 );

ThenSzresult = ____.

6.MFCFrom which most classes inherit (Csf-target,Cobject,Cwinapp,Cwnd)?(2Minute)__Cobject__

7. Memory is the process rangeOrThread range;____

CPUDuring schedulingOrThread;____

Function call stack for processesOrThread.____ (3Minute)

8. Call the FunctionBbbWhat is the output?(4Minute)

Void CCC (int x)

{

Char sztemp [10] = "";

X = 2;

Sprintf (sztemp, "% d,", X );

Afxdump <sztemp;

If (x = 3)

{

Int x = 4;

Sprintf (sztemp, "% d,", X );

Afxdump <sztemp;

}

Sprintf (sztemp, "% d,", X );

Afxdump <sztemp;

}

 

Void BBB ()

{

Char sztemp [10] = "";

 

Int x = 7;

CCC (X );

Sprintf (sztemp, "% d,", X );

Afxdump <sztemp;

}

 

2. correct questions(Total15Minute,Each question5Minute).

1. BelowCodeError

Void func1 ()

{

Int * pA = NULL;

Func2 (PA );

Delete Pa;

}

Void func2 (int * pb)

{

PB = new int (5 );

}

2. What are the following code errors?

Void func2 (int * value)

{

* Value = 2;

}

Void func1 ()

{

Int * p = 0;

Func2 (P );

}

3.

Int func1 (Int & B)

{

Return 0;

}

Void func2 ()

{

Int BBB = 3;

Func1 (& BBB );

Func1 (BBB );

}

Func2What are the errors,Func1ParametersB.

Iii. Short answer(64Minute)

1.Brief IntroductionC,C ++,VC,MFCConceptual differences(4Minute)

2. Write a simple example of function overloading.(4Minute)

3.Which function is used to start new processes and threads.(4Minute)

4. sendmessageAndPostmessageWhat is the difference?(4Minute)

5. waitforsingleobjectWhat is the function;M_pthrdIsCwinthread *,Waitforsingleobject (m_pthrd-> m_hthread, infinite );What is the function.(4Minute)

6. _ stdcall,_ Cdecl,_ PascalWhat are the differences.(4Minute)

7. Add the following code for exception handling.(6Minute)

Int mywritefile (cstring strfilename, cstring strtext)

{

Int nret = 0;

Cfile myfile;

Myfile. Open (strfilename, cfile: modewrite | cfile: Export exclusive | cfile: modecreate, null );

Int nlen = strtext. getlength ();

Myfile. Write (char *) (lpcstr) strtext, nlen );

Myfile. Close ();

 

Return nret;

}

8. Please explain"Func"What type, what is the role of this type, variablesTttWhat is the value?(6Minute)

Typedef int (* func) (INT, int *);

Int XXX (int A, int * P)

{

Return A + * P;

}

Int dowork (func AAA, int BBB, int * CCC)

{

Return AAA (BBB, CCC );

}

Int SSS = 4;

Int TTT = dowork (& XXX, 3, & SSS );

9. Please refer to the following code:: Int operator + (...?ThisWhat is it?CCCWhat is the final value?(6Minute)

Class fruit

{

Public:

Fruit ()

{

Weight = 2;

}

Fruit (int w)

{

Weight = W;

}

Int operator + (fruit F)

{

Return this-> weight * F. weight;

}

PRIVATE:

Int weight;

};

Fruit AAA;

Fruit BBB (4 );

Int CCC = aaa + BBB;

10.Which of the following code is used?C ++Feature (CWhat is the role of a language?(6Minute)

Template <typename T>

T Sum (t a, t B)

{

Return (A + B );

}

 

11. Please explainAAA. hFunction of the following code(5Minute)

# If! Defined (afx_mysudu_h00009b952bea_a051_4026_b4e5_0598a39d2da40000included _)

# Define afx_mysudu_h00009b952bea_a051_4026_b4e5_0598a39d2da40000included _

......

# Endif

 

 

12.CmemorystateWhat are the main functions?(5Minute)

13. Read the following code to write the program execution result (6Points)

# Include <iostream>

Using namespace STD;

 

Class cbase

{

Public:

Virtual void print ()

{

Cout <"base" <Endl;

}

Void doprint ()

{

Print ();

}

};

 

Class cchild1: Public cbase

{

Public:

Virtual void print ()

{

Cout <"Child1" <Endl;

}

};

 

Class cchild2: Public cbase

{

Public:

Virtual void print ()

{

Cout <"child2" <Endl;

}

};

 

Void doprint (cbase * Base)

{

Base-> doprint ();

}

 

Void main ()

{

Cbase * base = new cbase ();

Cchild1 * Child1 = new cchild1 ();

Cchild2 * child2 = new cchild2 ();

Doprint (Child1 );

Doprint (child2 );

Doprint (base );

 

Delete base;

Base = Child1;

Base-> Print ();

Delete Child1;

Delete child2;

}