UCR_CS10_Spr15_Final (Solution).docx

# A rows j columns i b ro ws i columns j c it depends

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A) rows: j; columns: i B) ro ws: i; columns: j C) It depends on the code inside the inner loop Code Block 8 Code Block 9 Code Block 10 for(int i=0; i < 3; i++) { for (int j=i; j >= 0; j-=1) { cout << "* "; } cout << endl; } int x = 4; while (x > 1) { if (x % 2 == 0) { int x = 5; cout << x; } x--; } int count = 0; for (int i = 0; i < 5; ++i) { for (int j = 0; j < i; ++j) { ++count; } } cout << count; 32) What is output by the code block 8? A) * * * B) * * * C) * * * * * * D) * * * * * * * * * E) * * * * * * F) * * * * * * 33) How many times does the loop in Code Block 9 iterate? A) 0 B) 1 C) 2 D) 3 E) 4 F) the loop does not finish (infinite) 34) What is the final value of count, after Code Block 10 completes? A) 0 B) 5 C) 10 D) 11 E) 15 F) 25

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Name (first and last): _________________________________ Username: ______________ Code Block 13 Code Block 14 void q(int x, int &b) { b = x * 2 + b; x = 4 * b; } int n(int a, int b) { return a + b; } int m(int &x, int &y) { y = x + 3; q(3, y); return x % y; } int main() { int a = 7, b = 11; q(a, b); cout << a << ' ' << b; // Line 1 cout << endl; a = 7, b = 11; b = n(a, b); cout << a << ' ' << b; // Line 2 cout << endl; a = 7, b = 11; a = n(m(a, b), 3); cout << a << ' ' << b; // Line 3 cout << endl; return 0; } void q(int x, int b) { b = x * 2 + b; x = 4 * b; } int n(int a, int b) { return a + b; } int main() { int a = 7, b = 11; a = n(q(a, b), a); // Line 1 a = n(a, a); // Line 2 cout << q(a, b); // Line 3 cout << n(a, b); // Line 4 return 0; } 35) What is output by line 1 of Code Block 13? A) 7 11 B) 7 25 C) 44 11 D) 44 25 E) 11 7 F) compiler error on line 36) What is output by line 2 of Code Block 13? A) 7 18 B) 44 55 C) 7 11 D) 44 69 E) 7 32 F) compiler error on line 37) What is output by line 3 of Code Block 13? A) 7 16 B) 10 10 C) 10 16 D) 17 10 E) 10 11 F) compiler error on line 38) The denoted Line 1 of the code block 14 causes a compiler error. A) true B) false 39) The denoted Line 2 of the code block 14 causes a compiler error. A) true B) false 40) The denoted Line 3 of the code block 14 causes a compiler error. A) true B) false 41) The denoted Line 4 of the code block 14 causes a compiler error. A) true B) false
Name (first and last): _________________________________ Username: ______________ Code Block 15 Code Block 16 int main() { srand(667); vector <int> roll(4); int die; for(int i=0; i < 4; i++) { die = rand() % roll.size(); <STUDENT CODE HERE> } cout << "Blanks: " << roll.at(0) << endl; cout << "1s: " << roll.at(1) << endl; cout << "2s: " << roll.at(2) << endl; cout << "3s: " << roll.at(3) << endl; return 0; } int main() { vector <int> v(2); v.pop_back(); v.push_back(4); v.push_back(7); v.pop_back(); v.push_back(9); return 0; } 42) We are rolling a 4 sided die, the sides have dots on them to denote a number but one of the sides is blank, the others have one, two, or three dots. Fill in the code block 15 so each roll will be counted and after we can know how many of each we saw. A) roll.at(die) += 1; B) roll.at(i) += 1; C) roll.at(die - 1) += 1; D) roll.at(i - 1) += 1; 43) After the code block 16 is executed, what are the contents of v? A) 4 7 9 B) garbage 4 9 C) garbage 4 7 9 D) 0 4 7 9 E) 0 4 9 F) garbage garbage 4 7 9 44) What is output by the code block? vector <string> v(3); v.at(0) = "pants"; v.at(1) = "spant"; v.at(2) = "peanuts"; for(int i=0; i < v.size(); i++ ){ for (int j=0; j < v.at(i).size(); j=j+3) { cout << v.at(i).at(j); } } A) peanuts B) pantsspantpeanuts C) ptsnpns D) ptsnpn E) nothing F) compiler error

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Name (first and last): _________________________________ Username: ______________ Code Block 17 Code Block 18 Code Block 19 vector <int> v(5); v.at(0) = 6; v.at(1) = 3; v.at(2) = 1; v.at(3) = 4; v.at(4) = 1; for(int i=0; i < v.size(); i++) { if(v.at(i) % 2 == 0) { v.pop_back(); } else if(v.at(i) % 3 == 0) { v.push_back(3); } } int max(int a, int b) { if (a == b) { return a; } else if (a > b) { return a; } return 0; } vector <string> v(5); v.at(0) = "he"; v.at(1) = "phq"; v.at(2) = "q425"; v.at(3) = "mxxsdf"; v.at(4) = "so352f"; for(int i=1; i < v.size(); i++) { cout << v.at(i).at(i); } 45) Given the definition vector <vector<string > > v; and that none of the at() calls goes out of range.
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