The questions of Test_1

with two model answers - one correct (yes) and one incorrect (no)

Mark the correct and incorrect assertions about computers and programming.
(yes) Assembler is processor dependent low-level language.
(no)  CPU can read data from ROM and can write data back to it.

Mark the valid and invalid variable names.
(yes) saved_yes
(no)  low-level

Mark the correct and incorrect variable definition statements.
(yes) int p = 22;
(no)  dimes = 1;

Mark the correct and incorrect input and output statements. Suppose that all variables used in the expressions, are defined and initialized properly.
(yes) cout << "Hello\n";
(no)  cout >> dimes;

Mark the correct and incorrect assignment statements. The variables k, count and n have int type; the variables total and x have double type; the variables sub and s have string type.
(yes) k = 2*n + 3;
(no)  int n = x * 100;

Mark the syntax correct and incorrect arithmetic expressions. All variables have int type.
(yes) nik + 1
(no) %beta % 2

Mark the syntax correct and incorrect arithmetic expressions. All variables have double type.
(yes) s21 + t20 / 5
(no) 2 * t % (t + 1 )

We have the following variable definitions:
    int k = 2;
    double x = 0.5;
Calculate the arithmetic expressions (using C++ syntax) and mark with "yes'' these, which have values 10 (as an integer number or a floating point number).
(yes) 20 * x
(no)  8 * x + k

We have the following variable definitions:
    int a1 = 21;
    int a2 = 81;
    int k = 9;
Calculate the arithmetic expressions (using C++ syntax) and mark with "yes'' these, which have values 9 (as an integer number or a floating point number).
(yes) a2/k
(no)  a1 - k

Mark the arithmetic expressions which have double type of the result. The following variable definitions are given:
    int j = 25;
    double z = 3.75;
(yes) z + j/10
(no) j%4 + 121

Mark the correct definitions of the string variable name. The variable pname is already defined and has a value "ABCDEF".
(yes) string name = "Neli";
(no)  string name = 19;

We have the following variable definitions:
    string n = "987";
    string m = "ABCZ";
Mark the syntax correct and incorrect statements.
(yes) cout << n.substr(0,2);
(no)  cout << length(m);

Mark the correct and incorrect statements about the class Time and already defined object t of this class.
(yes) Time end_day(1,0,1);
(no)  cout << t.get_hours(t);

Mark the correct and incorrect statements about the class Employee and already defined object harry of this class.
(yes) harry.set_salary(400);
(no)  cin >> harry.set_salary();

We have the following graphics objects definitions:
    Point p(3,2), q(4,3);
    Circle c(p, 2);
    Line l(p,q);
    Message m(p,"Hello!");
Mark with "yes'' the statements in which these objects and member-functions from graphics classes are used correctly.
(yes) double px = p.get_x();
(no)  get_x();

Mark the valid and invalid statements about the graphics window. Let m be an object from Message class.
(yes) cwin << Point(-1, 1);
(no)  cwin << "Hello!";