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CS 010: Introduction to Computer Science I

Quiz 2: 10 minutes

1. What is output by the following statement provided all needed libraries were included?

cout << fixed << setprecision(2) << 20 / 8;

a. 2.5

b. 2.50

c. 2

d. 2.0

e. 4

f. there is a syntax error

2. What is output by the following statement provided all needed libraries were included?

cout << fixed << setprecision(2) << 20 % 8;

a. 2.5

b. 2.50

c. 2

d. 2.0

e. 4

f. there is a syntax error

3. What is output by the following statement provided all needed libraries were included?

cout << fixed << setprecision(2) << 20.0 / 8;

a. 2.5

b. 2.50

c. 2

d. 2.0

e. 4

f. there is a syntax error

4. What is output by the following statement provided all needed libraries were included?

cout << fixed << setprecision(2) << 20.0 % 8;

a. 2.5

b. 2.50

c. 2

d. 2.0

e. 4

f. there is a syntax or compile-time error

5. Strings are a built-in or fundamental data type of C++.
1. TRUE
2. FALSE

6. What is output by the following statements?

int x = 10;

20 = x;

cout << x;

1. 10
2. 20
3. x
4. 10.0
5. 20.0
6. there is a syntax error

7. Which C++ expression below is a valid translation of the following algebraic expression?

1. a^2 (b – 1) / (b + 1) – (c / d)
2. a^2 * ((b – 1) / (b + 1)) – (c / d)
3. a * a * b – 1 / b + 1 – c / d
4. a * a * (b – 1) / (b + 1) – c / d
5. B and D
6. None of the above.

8. What is output by the following statements?

string str1 = “hello!”;

string str2 = “jumble”;

cout << str2.substr(0,1) << str1.substr(5,1);

1. jello!
2. humble
3. j!
4. ello!
5. jumblehello!
6. none of the above

9. What is the value of x after the following statements?

double x = 4.5678

cout << fixed << setprecision(2);

1. 4.5678
2. 4.56
3. 4.57
4. 4.5
5. 4.6
6. none of the above

10. Any sequence or combination of space and newline characters are considered white space in C++.

1. TRUE
2. FALSE