Trắc nghiệm C++

#include <iostream>

int main()

{

int a = 10;

cout<<a;

int a = 20;

cout<<a;

return 0;

}

• 1020

• 1010

• 2020

• Lỗi: Redeclaration of a

int x = 10;

int main(){

int x = 0;

cout<<x;

return 0;

}

• 10

• 0

• compile error

• undefined

What will be the output of the following C code?

#include <stdio.h>

int main()

{

int a = 1, b = 1, c;

c = a++ + b;

printf("%d, %d", a, b);

}

• a=1, b=1

• a=2, b=1

• a=1, b=2

• a=2, b=2

Is it possible to run program without main() function?

• yes

• no

• may be

The output of the following segment is

int k, n=20;

k=(n>5?(n<=10?100:200):500);

printf("%d",n);

• 100

• 200

• 300

• 20

• Inside try

  Exception Caught

  After throw

  After catch

• Inside try

  Exception Caught

  After catch

• Inside try

  Exception Caught

• Inside try

  After throw

  After catch

• The derived class can not call the base class func().

• Must place “using namespace Base” at the top of the file.

• Base::d.func();

• d.Base::func();

How many main() function we can have in our project?

• 1

• 2

• no limit

• depends on the program

What will be the output of the following C code?

#include <stdio.h>

int main()

{

int x = 0;

if (x == 1)

if (x >= 0)

printf("true\n");

else

printf("false\n");

}

• Depends on the compiler

• No print statement

• True

• False

The value of i after the execution of the following segment is

i = 2;

for( i=0; i>10; i=i+1);

• 1

• 2

• 0

• 11