# MAT 2051 Discrete Mathematics Unit 6 Quiz 3

**MAT 2051 Discrete Mathematics ****Unit 6 Quiz 3**

Question 1 How many times does the computer print the string “Hello”?

i = 2

while (i < 4) {

print (“Hello”)

i = i + 1}:

Answers:

a. 1.

b. 2.

c. 3.

d. 4.

Question 2Which of the following is O(n)?

Answers:

a. 3n + 1.

b. n * log(n).

c. n * n + n.

d. None of the above.

Question 3 If each of the following describes the run time of an algorithm, which of the following could have the longest run time?

Answers:

a. O(nlog(n)).

b. O(n!).

c. O(n/2).

d. O(n * n).

Question 4What does the following algorithm return?

f(n){

if (n< 2)

return 1

else

return f(n – 1) * n:

Answers:

a. n!

b. The maximum divisor of n.

c. (n – 1)!

d. n 2.

.Question 5 Given that S_n denotes the number of n-bit strings that do not contain the pattern 00, what are the initial conditions?

Answers:

a. S_1 = 2, S_2 =3.

b. S_1 = 1, S_2 =2.

c. S_1 = 0, S_2 =2.

d. None of the above.