Which of the following is TRUE about routers?

One "root" router is responsible for communication to all "sub-routers"

A path is established before the message is sent

An online retailer uses an algorithm to sort a list of n items by price. The table above shows the approximate number of steps the algorithm takes to sort lists of different sizes. Based on the values in the table, which of the following best characterizes the algorithm for very large values of n ?

The algorithm runs in reasonable time.

The algorithm runs, but not in reasonable time.

The algorithm attempts to solve an undecidable problem.

The algorithm attempts to find an approximate solution whenever it fails to find an exact solution.

A user's computer is communicating with a web site securely using asymmetric encryption. The user's computer is encrypting and sending a message to the website. Which key will be used to decrypt the message?

The user computer's private key

Which of the following describes a benefit of using hexadecimal numbers instead of binary numbers to represent data?

A hexadecimal representation of a value generally requires fewer digits than a binary representation of the same value.

Hexadecimal can be used to represent fractional values, but binary can only represent integers.

Hexadecimal can be used to represent a wider variety of data types than binary can, including color and geolocation data.

Hexadecimal is easier for a computer to understand than binary is.

Which of the following is an example of symmetric encryption?

Finn and Gwen develop a system that maps each letter of the alphabet to a unique symbol using a secret key. Finn uses the key to write a message to Gwen where each letter is replaced with the corresponding symbol. Gwen uses the key to map each symbol back to the original letter.

Evy buys a locked box that operates using two different codes. When the first code is entered, a slot opens that allows a message to be put in the box. When the second code is entered, the door to the box opens. Evy gives the first code to her friends so they can leave messages for her and keeps the second code to herself so that she is the only one who can retrieve the messages.

Hannah writes a message to send to Isabel and hides the message under a rock behind the soccer field. Hannah gives Isabel the exact location of the rock so that only Isabel can find the message.

Juan writes a message to send to Kelly and slides the message through a slot in the front of Kellys locker. Juan knows that Kely has not shared her locker combination with anyone, so no one other than Kelly will be able to read the message.

Two different schools maintain data sets about their currently enrolled students. No individual student is enrolled at both schools. Each line of data contains information, separated by commas, about one student. The two schools would like to combine their data to make a single data set. Which of the following can be done with the combined data? Select two answers.

The schools can create a single list of student names, sorted by last name.

The schools can determine the average number of days students are absent.

The schools can determine which ZIP code is represented by the most students.

The schools can determine the student ID of the student with the greatest number of absences.

A student wants to create an algorithm that can determine, given any program and program input, whether or not the program will go into an infinite loop for that input. The problem the student is attempting to solve is considered an undecidable problem Which of the following is true?

It is not possible to create an algorithm that will solve the problem for all programs and inputs.

It is possible to create an algorithm that will solve the problem for all programs and inputs, but the algorithm can only be implemented in a low-level programming language.

It is possible to create an algorithm that will solve the problem for all programs and inputs, but the algorithm requires simultaneous execution on multiple CPUs.

It is possible to create an algorithm that will solve the problem for all programs and inputs, but the algorithm will not run in reasonable time.

Internet protocol version 4 (IPv4) represents each IP address as a 32-bit binary number. Which of the following best describes the result of using 128-bit addresses instead of 32-bit addresses?

2 96 times as many addresses are available.

4 times as many addresses are available.

96 times as many addresses are available.

2 4 times as many addresses are available.

Which of the following statements accurately describe the hierarchy of Web pages example.org and about.example.org? Select the two BEST answers.

The Web page about.example.org is a subdomain of example.org.

The Web page example.org is a domain under the top-level domain .org.

The Web page about.example.org is a subdomain of about.org.

The Web page example.org is a domain under the top-level domain example.

Consider the following numbers: Binary: 11100 Decimal: 27 Hexadecimal: 1A Which of the following lists the numbers in order from least to greatest?

Hexadecimal: 1A, Decimal: 27, Binary: 11100

Binary: 11100, Decimal: 27, Hexadecimal: 1A

Decimal: 27, Binary: 11100, Hexadecimal: 1A

Decimal: 27, Hexadecimal: 1A, Binary: 11100

An algorithm will be used to identify the maximum value in a list of one or more integers. Consider the two versions of the algorithm below. Algorithm I: Set the value of the variable max to -1. Iterate through the list of integer values. If a data value is greater than the value of the variable max, set max to the data value. Algorithm II: Set the value of a variable max to the first data value. Iterate through the remaining values in the list of integers. If a data value ins greater than the value of the variable max, set max to the data value.

Algorithm II always works correctly, but Algorithm I only works correctly when the maximum value is greater than or equal to -1.

Both algorithms work correctly on all input values.

Algorithm I always works correctly, but Algorithm II only works correctly when the maximum value is not the first value in the list.

Neither algorithm will correctly identify the maximum value when the input contains both positive and negative input values.

Digital images are often represented by the red, green, and blue values (an RGB triplet) of each individual pixel in the image. A photographer is manipulating a digital image and overwriting the original image. Which of the following describes a lossless transformation of the digital image?

Creating the negative of an image by creating a new RGB triplet for each pixel in which each value is calculated by subtracting the original value from 255. The negative of an image is reversed fromthe original; light areas appear dark, and colors are reversed.

Compressing the image in a way that may lose information but will suffer only a small loss of image quality.

Creating the gray scale of an image by averaging the amounts of red, green, and blue in each pixel and assigning the new value to the corresponding pixel in the new image. The new value of each pixel represents a shade of gray, ranging from white to black.

Modifying part of the image by taking the pixels in one part of the picture and copying them to the pixels in another part of the picture.

A programmer is deciding between using a linear or binary search to find a target value in a sorted list. Which of the following is true?

Generally, the advantage of using a binary search over a linear search increases as the size of the list increases.

In all cases, a binary search of a sorted list requires fewer comparisons than a linear search.

A linear search will generally run faster than a binary search because a linear search requires fewer lines of code to implement.

Using a linear search is preferable to using a binary search if there is a chance that the target may not be found in the list.

Which of the following programs is most likely to benefit from the use of a heuristic?

A program that finds the shortest driving route between two locations on a map

A program that calculates a student's grade based on the student's quiz and homework scores

A program that encrypts a folder of digital files

A program that sorts a list of numbers in order from least to greatest

AP CSP Review

Quiz

•

Computers

•

9th - 12th Grade

•

Practice Problem

•

Hard

Heather Padilla

Used 14+ times

FREE Resource

Student preview

25 questions

Show all answers

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The two code segments below are each intended to display the average of the numbers in the list numList. Assume that numList contains more than one value.

Which of the choices below best describes the two code segments?

Code segment I displays the correct average, but code segment II does not.

Code segment II displays the correct average, but code segment I does not.

Both code segments display the correct average, but code segment I requires more arithmetic operations than code segment II.

Both code segments display the correct average, but code segment II requires more arithmetic operations than code segment I.

MULTIPLE SELECT QUESTION

5 mins • 1 pt

The program below is intended to count the number of prime numbers in a list called numbers and display
the result. The program uses the procedure is Prime (n), which returns true if n is a prime number and false otherwise.
The program does not work as intended.
Which two lines of code should be removed so that the program will work as intended?
Select two answers.

line 1

line 4

line 7

line 9

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The number of mice increases by 1 each day.

The number of mice does not change from day to day.

The number of predators increases by 1 each day.

The number of predators does not change from day to day.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following can be used to combine two strings to create a new string?

concatenation

algorithm

conditional

variable

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is a sequence of instructions which a computer runs to perform a desired task?

program

compiler

assembly

algorithm

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which expression evaluates to the highest (largest) number?

16 MOD 5-2

16 MOD (5-2)

2*16 MOD 5

5 MOD 16* 2

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following protocols is primarily used to establish a secure connection between browsers and servers so that no data is lost?

HTTP

SMTP

SSL/TLS

TCP/IP

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AP CSP Review

25 questions

The two code segments below are each intended to display the average of the numbers in the list numList. Assume that numList contains more than one value.Which of the choices below best describes the two code segments?

Which of the following can be used to combine two strings to create a new string?

What is a sequence of instructions which a computer runs to perform a desired task?

Which expression evaluates to the highest (largest) number?

Which of the following protocols is primarily used to establish a secure connection between browsers and servers so that no data is lost?

Which of the following is TRUE about routers?

An online retailer uses an algorithm to sort a list of n items by price. The table above shows the approximate number of steps the algorithm takes to sort lists of different sizes.Based on the values in the table, which of the following best characterizes the algorithm for very large values of n?

A user's computer is communicating with a web site securely using asymmetric encryption. The user's computer is encrypting and sending a message to the website. Which key will be used to decrypt the message?

Create a free account and access millions of resources

Popular Resources on Wayground

Discover more resources for Computers

The two code segments below are each intended to display the average of the numbers in the list numList. Assume that numList contains more than one value.

Which of the choices below best describes the two code segments?

An online retailer uses an algorithm to sort a list of n items by price. The table above shows the approximate number of steps the algorithm takes to sort lists of different sizes.

Based on the values in the table, which of the following best characterizes the algorithm for very large values of n?

A user's computer is communicating with a web site securely using asymmetric encryption.

The user's computer is encrypting and sending a message to the website. Which key will be used to decrypt the message?