1..How many total elements are in an array with 4 rows and 3 columns? Select one
ID: 3871327 • Letter: 1
Question
1..How many total elements are in an array with 4 rows and 3 columns? Select one:
a. 4
b. 6
c.
12
d. 16
2..
Which statement is equivalent to the following code?
if (x > 4) {
y = 3;
else {
y = x;
}
Select one:
a. y = (x > 4) ? 3 : x;
b. y = (x > 4) : 3 ? x;
c. y = 3 ? (x > 4) : x;
d. y = (3 ? x) : (x > 4);
5..
vector<int> v(10);
int i = 0;
for (i = 0; /* statement goes here */ ; ++i) {
v.at(i) = i;
}
Select one:
a. i <= v.size()
b. i < v.size()
c. i < size(v)
d. i <= 10
7..
int main () {
int day;
cout << “Please enter which day of the month it is: “; // A)
cin >> day // B)
cout << “There are “ << 31 - day << “ days left until next month.”; // C)
return 0;
}
Select one:
a. cout << “Please enter which day of the month it is: “;
b. cin >> day
c. cout << “There are “ << 31 - day << “ days left until next month.”;
d. No errors.
8..
What is a variable in coding?
Select one:
a. Used to denote a list of statements.
b. A row of text.
c. Represents a particular memory location.
d. Textual representation of a program.
9..
What is the output of the following code?
char myFirstInitial = ‘b’;
switch (myFirstInitial) {
case ‘a’:
cout << ‘A’;
case ‘b’:
cout << ‘B’;
case ‘c’:
cout << ‘C’;
default :
cout << ‘D’;
}
Select one:
a. BCD
b. B
c. BC
d. D
What is the output of the following code assuming the vector nums contains the values: -25, 0, 3, 15, 17, -12, and 0.
cnt = 0;
for(i = 0; i < nums.size() ; ++i) {
if( nums.at(i) > 0 ) {
++cnt;
}
}
cout << cnt << endl;
Select one:
a. 0
b. 3
c. 5
d. 7
14 .
What is the output of the following code?
int main() {
double x = 3.0; double y = 1.9;
cout << x / ceil(y);
return 0;
}
Select one:
a. 1
b. 1.5
c. 2
d. 3
Taking a test please answer asap
Explanation / Answer
1) 4 rows 3 columns
4*3 = 12 elements
c) 12
2) a. y = (x > 4) ? 3 : x;
5) b. i < v.size()
7) b. cin >> day // has error semi-colon at the end
8) d. Textual representation of a program.
9) b. BCa // it prints BCD
// first case is a it doesnot matches with a
//so it goes to case b it matches
//since there is no break all the remaining cases will perform with cases having no break
10) b. 3 // 3 positive nums>0
14) b. 1.5
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