C++ Institute C++ Institute Certifications CPA-21-02 Questions & Answers

• Question 151:

  What happens when you attempt to compile and run the following code? #include

  using namespace std;

  int main()

  {

  int a=5;

  cout << ((a < 5) ? 9.9 : 9);

  }

  A. It prints: 9

  B. It prints: 9.9

  C. Compilation error

  D. None of these

  Correct Answer: A

• Question 152:

  What happens when you attempt to compile and run the following code?

  #include

  using namespace std;

  int main()

  {

  int *t;

  t = new int[2];

  for (int i=0; i<2; i++) {

  t[i] = i;

  }

  cout << t[1];

  }

  A. It prints: 0

  B. It prints: 1

  C. It prints: 10

  D. It prints: ?1

  Correct Answer: B

• Question 153:

  What is the output of the program?

  #include

  #include

  using namespace std;

  class First

  {

  string name;

  public:

  First() {

  name = "Alan";

  }

  void setName(string n) {this?>name = n;}

  void setName() {this?>name = "John";}

  void Print(){

  cout << name;

  }

  };

  int main()

  {

  First ob1,*ob2;

  ob2 = new First();

  First *t;

  t = andob1;

  t?>setName();

  t?>Print();

  t = ob2;

  t?>setName("Steve");

  ob2?>Print();

  }

  A. It prints: JohnSteve

  B. It prints: AlanAlan

  C. It prints: AlanSteve

  D. It prints: JohnAlan

  Correct Answer: A

• Question 154:

  What happens when you attempt to compile and run the following code?

  #include

  using namespace std;

  int op(int x, int y);

  int main()

  {

  int i=2, j=2, k;

  float f=0.3;

  k = op(i, j);

  cout<< k << "," << op(1, f);

  return 0;

  }

  int op(int x, int y)

  {

  return x+y;

  }

  A. It prints: 4,1

  B. It prints: 4,0.7

  C. It prints: 4,0

  D. It prints: 0,4

  Correct Answer: A

• Question 155:

  The following declaration: int i = 0b10;

  A. is invalid

  B. sets variable i with an integer value equal to 10

  C. sets variable i with an integer value equal to 2 (10 binary)

  D. sets variable i with an integer value equal to 8 (10 octal)

  Correct Answer: D

• Question 156:

  What happens when you attempt to compile and run the following code?

  #include

  using namespace std;

  int main()

  {

  int i=5;

  switch(i)

  {

  case 1:

  cout<<"Hello";

  break;

  case 2:

  cout<<"world";

  break;

  case 3:

  break;

  default:

  cout<<"End";

  }

  return 0;

  }

  A. It prints: Hello

  B. It prints: world

  C. It prints: End

  D. It prints: Helloworld

  Correct Answer: C

• Question 157:

  If there is one, point out an error in the program

  #include

  using namespace std;

  int main()

  {

  int i=1;

  for(;;)

  {

  cout<

  if(i>5)

  break;

  }

  return 0;

  }

  A. Error in "if" statement

  B. Error in "for" loop

  C. No error

  D. Error in break statement

  Correct Answer: C

• Question 158:

  What will happen when you attempt to compile and run the following code?

  #include

  using namespace std;

  int main (int argc, const char * argv[])

  {

  enum state { ok, error, warning};

  enum state s1, s2, s3;

  s1 = ok;

  s2 = warning;

  s3 = error;

  s4 = ok;

  cout << s1<< s2<< s3;

  return 0;

  }

  A. It will print:"123"

  B. compilation error

  C. It will print:"021"

  D. It will print:"132"

  Correct Answer: B

• Question 159:

  Which code line inserted instead of the comment below will fix the program so that it produces the expected output and does not cause any memory leak?

  

  A. delete [] p;

  B. delete p[];

  C. delete p;

  D. delete *p;

  Correct Answer: A

• Question 160:

  What happens when you attempt to compile and run the following code?

  #include

  #include

  using namespace std;

  int main()

  {

  string s1[]= {"How" , "to" };

  s1[0].swap(s1[1]);

  for (int i=0; i<2; i++) {

  cout << s1[i];

  }

  return( 0 );

  }

  A. It prints: Hoto

  B. It prints: toHow

  C. It prints: Ht

  D. It prints: to

  Correct Answer: B