Multiple Choice Quiz

1. Which of the following will initialize the variable x to the numerical value 0?

(A) char x = "";

(B) char x = '0';

(C) char x = '\0';

(D) char x = std::endl;

2. What will happen if you do not explicitly initialize an int variable?

(A) The variable will be automatically initialized to zero by default.

(B) The variable's scope will be adjust to where it is first used.

(C) The variable will not have any memory allocated for it.

(D) Setting the variable later will be considered undefined behavior.

(E) The value of that variable will be undefined.

3. When would you mark a stand-alone function as const?

(A) When the first argument is a reference to an object that should not be altered

(B) When it doesn't modify any of its parameters

(C) When it doesn't modify any global variables

(D) None of the above (only member functions should be marked const)

4. What is the value of var2 after the following code executes?
  int var1 = 5;
  var1 += 5;
  int var2 = 2 * var1++;

(A) 21

(B) 20

(C) 22

(D) 10

(E) Nothing: it is illegal C++ code

5. Which of the following is an illegal use of the keyword "auto"?

(A) const auto & my_err = std::cerr;

(B) auto i;

(C) auto my_str = std::string("Test.");

(D) auto my_var = std::string("abcd");

6. Why should you use "include guards" (or #pragma once) in your header files?

(A) They limit access to your code to trusted parties

(B) They link the header file with the associated code (.cpp) file

(C) They ensure that you do not duplicate identifiers if you include a file multiple times

(D) They ensure that files are included in the correct order

7. What will the following code print?
  char x = 'A';
  while (x <= 'E') {
    std::cout << x++;
  }

(A) ABCDE

(B) BCDEF

(C) ABCD

(D) A

(E) ABCDEF

8. If you make a function call TestFunction(91), which version of the function will be called?

(A) void TestFunction(double param);

(B) void TestFunction(int param1, int param2=0);

(C) void TestFunction(std::string param);

(D) void TestFunction();

9. What will the following code print?
  for (int i = 0; i < 6; ++i) {
    if (i == 2) continue;
    if (i == 4) break;
    std::cout << i;
  }

(A) 013

(B) 0134

(C) 012345

(D) 01

(E) 0123

10. What is the correct syntax for declaring a template function in C++?

(A) template <typename T> void foo(T);

(B) void foo(T) <- template <typename T>;

(C) void foo<template T>(T);

(D) <template typename T> void foo(T);