Question 1

Under the assumption that N takes on only integer values, which of the following is the termination condition in the following recursive procedure? procedure xxx (N) If (N < 5) then (print the value of N) Else (apply the procedure xxx to the value N - 1) A) N < 5 B) N > 4 C) N > 5

Accepted Answer

The termination condition is when N is less than 5. Once N is less than 5, the procedure will simply print out the value of N and stop recursing. Therefore, the condition to terminate the recursion is N < 5.

Question 2

When searching within the list Lewis, Maurice, Nathan, Oliver, Pat, Quincy, Roger, Stan, Tom
Which of the following entries will be found most quickly using the binary search algorithm?
A) Lewis
B) Pat
C) Tom

Accepted Answer

Binary search algorithm works most efficiently by repeatedly dividing the search interval in half. The middle element of the sorted list (in this case, "Pat") can be found most quickly because the algorithm will start the search from the middle of the list.

Question 3

When searching within the list Lewis, Maurice, Nathan, Oliver, Pat, Quincy, Roger, Stan, Tom
Which of the following entries will be found most quickly using the sequential search algorithm?
A) Lewis
B) Pat
C) Tom

Accepted Answer

The list is not ordered or sorted, so a sequential search algorithm would have to go through each item one by one until it finds the desired entry. Therefore, the entry that appears first in the list, which is Lewis, will be found most quickly.

Question 4

Which of the following is not a means of repeating a block of instructions?
A) Pretest loop
B) Posttest loop
C) Recursion
D) Assignment statement

Accepted Answer

An assignment statement is not a means of repeating a block of instructions. It is a statement that assigns a value to a variable. Pretest loop, posttest loop, and recursion are all ways to repeat a block of instructions.

Question 5

In general, an algorithm in which of the following categories is considered more efficient? A)$ \varTheta$(lg n) B) $ \varTheta$(n) C) $ \varTheta$(n lg n) D) $ \varTheta$( n² )

Accepted Answer

The answer of In general, an algorithm in which of...

Question 6

Which of the following does not print the same sequence of numbers as the others?
A) X $\leftarrow$ 5
B) X $\leftarrow$ 4
C) X $\leftarrow$ 5

Accepted Answer

The answer of Which of the following does not print...

Question 7

Which of the following is not a way of representing algorithms?
A) Stepwise refinement
B) Pseudocode
C) Flowchart
D) Programming language

Accepted Answer

Stepwise refinement is a method for developing a detailed algorithm by gradually adding detail to a high-level algorithm, rather than a way of representing algorithms. Pseudocode, flowcharts, and programming languages are all common ways to represent algorithms.

Question 8

Under the assumption that X takes on only integer values, which of the following is the termination condition for the following loop? while (X < 5) do
( ) . . )
A) X < 5
B) X > 4
C) X < 4

Accepted Answer

The termination condition ensures that the loop will continue until X is greater than or equal to 5. If X starts as an integer less than 5, the loop will execute until X is incremented to 5 or greater, and then it will terminate. Therefore, the correct termination condition is X > 4.

Question 9

Which of the following set of instructions defines an algorithm in the formal, strict sense? 
A) 
B) 
C)

Accepted Answer

The answer of Which of the following set of instructions...

Question 10

Under the assumption that N takes on only integer values, which of the following is the termination condition in the following recursive procedure? procedure xxx (N)
If (N < 5) then (apply the procedure xxx to the value N + 1)
Else (print the value of N)
A) N < 5
B) N > 4
C) N < 4

Accepted Answer

The termination condition is the condition that stops the recursion from continuing infinitely. In this case, the termination condition is when N is greater than 4. Once N is greater than 4, the program prints the value of N and stops the recursion. Therefore, choice B, N > 4, is the correct answer.

Question 11

The binary search algorithm is an example of an algorithm in which of the following classes? A) $ \varTheta$(lg n) B) $ \varTheta$(n) C) $ \varTheta$(n lg n) D) $ \varTheta$( n² )

Accepted Answer

Binary search algorithm has a time complexity of $ \varTheta$(lg n) because it repeatedly divides the search interval in half, reducing the problem size logarithmically.

Question 12

Which of the following is a loop invariant at the point at which the test for termination is performed in the following loop structure? 
A) X > 5
B) X < 8
C) X $\ge$ 5
D) X $\le$ 6

Accepted Answer

The answer of Which of the following is a loop...

Question 13

Preconditions, postconditions, and loop invariants are examples of which of the following?
A) Pseudocode
B) Iterative structures
C) Assertions
D) Recursion

Accepted Answer

Preconditions, postconditions, and loop invariants are all examples of assertions, which are statements used to check the correctness of a program or algorithm. Pseudocode is a way of writing out an algorithm in plain language instead of a specific programming language. Iterative structures refer to loops or repetitions within a program. Recursion is a function or algorithm that calls itself. None of these options are related to assertions, making C the correct choice.

Question 14

Under the assumption that X takes on only integer values, which of the following is the termination condition for the following loop? repeat ( . . . ) Until (X < 5) A) X < 5 B) X > 4 C) X > 5

Accepted Answer

The loop will terminate when the condition X < 5 is true, meaning X must be less than 5.

Question 15

Which of the following is a loop invariant at the point at which the test for termination is performed in the following loop structure? 
A) X > 5
B) X < 5
C) X $\ge$  5
D) X $\le$ 5

Accepted Answer

A loop invariant is a condition that always holds true throughout the execution of the loop. To determine the loop invariant at the point of termination, we can look at the condition that causes the loop to terminate. In this case, the loop will terminate when X is greater than or equal to 5. Therefore, the loop invariant must be X is less than or equal to 5, which is equivalent to choice D.

Question 16

Which of the following is an activity?
A) Algorithm
B) Program
C) Process

Accepted Answer

Process is the best choice as it refers to a series of actions taken to achieve a goal or complete a task, which is an activity. Algorithm and program are both related to instructions or code used in computing, but they do not necessarily involve an active process.

Question 17

The insertion sort algorithm is an example of an algorithm in which of the following classes? A)$ \varTheta$(lg n) B) F$ \varTheta$(n) C) $ \varTheta$(n lg n) D) $ \varTheta$( n² )

Accepted Answer

Insertion sort has a worst-case and average-case time complexity of $ \Theta(n^2) $ because it involves nested loops where each element is compared with the elements before it, leading to quadratic time complexity.

Question 18

Which of the following is the base case in the recursive procedure below? 
A) N > 0
B) N = 0
C) N < 0

Accepted Answer

The base case is the condition where the recursion stops and returns a value without further recursive calls. In the given recursive procedure, the base case is when N = 0, as this is the condition where the procedure stops and returns a value without further recursive calls. Choice A (N > 0) cannot be the base case since the procedure needs to continue until N reaches 0. Choice C (N < 0) also doesn't make sense as the procedure involves adding 2 to N until it becomes 0 or positive.

Question 19

Which of the following lists would not be obtained at some point when applying the insertion sort algorithm to the list below? 
Sylvia
Nancy
Lois
Alice

A)Nancy
Sylvia
Lois
Alice
B)Alice
Lois
Nancy
Sylvia
C)Alice
Sylvia
Nancy
Lois
D)Lois
Nancy
Sylvia
Alice

Accepted Answer

This list is already in alphabetical order, and insertion sort can sort a list in ascending or descending order, but it cannot reverse an already sorted list. Therefore, the list as presented in option C would not be obtained during the sorting process.

Question 20

Which of the following is a representation?
A) Algorithm
B) Program
C) Process

Accepted Answer

A program is a representation of an algorithm or process in a specific programming language. It is a set of instructions that a computer can execute to achieve a desired output. Therefore, a program is a concrete representation of an abstract algorithm or process.

Quiz 4: Networking and the Internet

Under the assumption that N takes on only integer values, which of the following is the termination condition in the following recursive procedure? procedure xxx (N) If (N < 5) then (print the value of N) Else (apply the procedure xxx to the value N - 1)

When searching within the list Lewis, Maurice, Nathan, Oliver, Pat, Quincy, Roger, Stan, Tom Which of the following entries will be found most quickly using the binary search algorithm?

When searching within the list Lewis, Maurice, Nathan, Oliver, Pat, Quincy, Roger, Stan, Tom Which of the following entries will be found most quickly using the sequential search algorithm?

Which of the following is not a means of repeating a block of instructions?

In general, an algorithm in which of the following categories is considered more efficient?

Which of the following does not print the same sequence of numbers as the others?

Which of the following is not a way of representing algorithms?

Under the assumption that X takes on only integer values, which of the following is the termination condition for the following loop? while (X < 5) do ( ) . . )

Which of the following set of instructions defines an algorithm in the formal, strict sense?

Under the assumption that N takes on only integer values, which of the following is the termination condition in the following recursive procedure? procedure xxx (N) If (N < 5) then (apply the procedure xxx to the value N + 1) Else (print the value of N)

The binary search algorithm is an example of an algorithm in which of the following classes?

Which of the following is a loop invariant at the point at which the test for termination is performed in the following loop structure?

Preconditions, postconditions, and loop invariants are examples of which of the following?

Under the assumption that X takes on only integer values, which of the following is the termination condition for the following loop? repeat ( . . . ) Until (X < 5)

Which of the following is a loop invariant at the point at which the test for termination is performed in the following loop structure?

Which of the following is an activity?

The insertion sort algorithm is an example of an algorithm in which of the following classes?

Which of the following is the base case in the recursive procedure below?

Which of the following lists would not be obtained at some point when applying the insertion sort algorithm to the list below? Sylvia Nancy Lois Alice

Which of the following is a representation?