COS1512 Assignment 1 2024 memo

COS Assignment 1 memo NOTE: Questions maybe different Question 1 The assert statement 1. tests conditions or assumptions that should not occur in a program to prevent runtime errors 2. will display an error message when the condition in the statement is not true and abort the program. 3. All of the other options are valid. 4. can be turned on and off in a program Question 2 Base your answer to this question on the highlighted directives at the beginning of the program. The program below will abort and display that the assertion has failed #define NDEBUG #include cassert int main() { int x = 7; /* Some big code in between and let's say x is accidentally changed to 9 */ x = 9; // Programmer assumes x to be 7 in rest of the code assert(x==7); /* Rest of the code */ return 0; } 1. True 2. False Question 3 To ensure that a test score score is valid, i.e. = 0 and = 100, we can use the following statement 1. assert(!(0 = score || score = 100)); 2. assert(score = 0 && score = 100); 3. assert(score = 0 || score = 100); 4. assert(!(0 = score && score = 100)); Question 4 A function returning a value must specify, in its header line, the ____ of the value that will be returned. 1. size 2. address 3. use 4. data type Question 5 An integrated development environment (IDE) 1. translates programming language instructions one line at a time into machine language 2. turns source code into an object program 3. is used to edit, preprocess, compile, link, load and execute programs written in a high-level language like C++ 4. checks your program for syntax errors Question 6 The compiler decides which definition of an overloaded function to execute based on the number of parameters or the types of parameters. 1. True 2. False Question 7 What is the output of the following program? #include iostream using namespace std; int operate (int a, int b) { return (a * b); } float operate (float a, float b) { return (a / b); } int main() { int x = 5, y = 2; float n = 5.0, m = 2.0; cout operate(x, y) "t"; cout operate (n, m); return 0; } 1. 10.0 5 2. 10 2.5 3. 10.0 5.0 4. 5.0 2.5 Question 8 Consider the following function headers: double calcVolume (double width, double height, double length); double calcVolume (double radius); double calcVolume (double radius, double height); The function call int volume = calcVolume(7.3, 5.1); 1. will execute this function double calcVolume (double width, double height, double length); 2. will execute this function double calcVolume (double radius); 3. will execute this function double calcVolume (double radius, double height); 4. will give a compiler error Question 9 Errors that can only be detected when a program is run, is called run-time errors. Question 10 When designing a program, the result of the problem-solving phase should be a Algorithm