Multiple Choice Quiz

1. If you make a function call TestFunction('a') and all of the following options are available, which version of the function will be called?

(A) void TestFunction();

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

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

(D) void TestFunction(char param);

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

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

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

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

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

3. How can the logical AND operator (&&) be used in C++?

(A) To test if two boolean expressions have identical values

(B) To test if two boolean expressions are both true

(C) To output a boolean value to the console

(D) To test if two boolean expressions have different values

4. If the following code compiles successfully, which is NOT a possible type for "out_stream"?
out_stream << "Hello test taker!";

(A) std::ofstream

(B) std::ostream &

(C) std::stringstream

(D) std::string

5. When compiling a large C++ project with many files, which of the following is NOT always good advice?

(A) Combined definitions into as few header files as possible

(B) Avoid having header files include each other (circular includes)

(C) Fully define template functions in the header file

(D) Declare most regular functions in a header, define them in the .cpp file

(E) Avoid polluting the global namespace in headers since it will cascade to filesthat include them

6. What is a difference between pointers and references in C++? +

(A) Pointers can point to multiple addresses at once, while references point to a single address

(B) Pointers can change the value of an object, while references cannot

(C) Pointers can be reassigned, while references cannot

(D) Pointers can be set at run time, while references are locked in at compile time

7. If you have an int variable called "id_num" and you want to convert it to a std::string called "id_name", which of these lines will work?

(A) std::string id_name(id_num);

(B) std::string id_name = std::stol(id_num);

(C) std::string id_name = static_cast<std::string>(id_num);

(D) std::string id_name = std::to_string(id_num);

8. What will the following code output?
std::vector<int> v{1,2,3,4};
std::cout << std::accumulate(v.begin()+1, v.end()-1, 0) << std::endl;

(A) 0

(B) 10

(C) 5

(D) 9

(E) 4

9. What does the following line of code do?
assert(x == 10);

(A) It checks to see if x is equal to 10; if not it prints an error and aborts the program

(B) It checks to see if x is equal to 10; if so it prints an error and aborts the program

(C) It checks to see if x is equal to 10; if not it writes a warning and keeps going

(D) It is only a reminder to the programmer about what to expect about this region of code

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

(A) auto & my_stream = std::cout;

(B) auto i;

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

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