Unit 1

Question 1

How do computers represent information?

Answer 1

Through bits; 0’s and 1’s

Question 2

True or False? A computing innovation includes an algorithm as an integral part of its function.

Question 3

What is the main difference between an algorithm and a program?

Question 4

Convert the following binary number 0010 to decimal.

Question 5

How MANY numbers are possible with 5-bits?

Question 6

An office uses an application to assign work to its staff members. The application uses a binary sequence to represent each of 54 staff members. What is the minimum number of bits needed to assign a unique bit sequence to each staff member?

Question 7

An online store uses 3-bit binary sequences to identify each unique item for sale. The store plans to increase the number of items it sells and is considering using 7-bit sequences. Which of the following best describes the result of using 3-bit sequences instead of 7-bit sequences?

Question 8

What error has occurred if x is not equal to y?
x3/7
y3/7

Question 9

ASCII is a character encoding scheme that uses 7 bits to represent each character. The decimal (base 10) values 65 through 90 represent the capital letters A through Z, as shown in the table below. Which letter is represented by the binary number (base 2)
101 0111?

Question 10

The following RGB color scheme uses 3 bits per color. Which of the following is the DARKEST shade of red?
RGB (001, 000, 010) ***the smaller the binary number the DARKER the color
RGB (010, 000, 100)
RGB (100, 000, 110)
RGB (111, 000, 111)

Question 11

A computer can use 6 bits to store non-negative numbers. Which numbers will NOT give an overflow error?

Question 12

What is the largest number that will NOT cause an overflow error using 3 bits of storage?

Question 13

A user wants to save a data file on an online storage site. The user wants to reduce the size of the file as much as possible, if possible, and quality of the file is not an issue. Which of the following actions best supports the user’s needs?

Question 14

Which of the following is true about lossy compression?
(A)Lossy compression throws away a lot of the original data, but humans can’t even tell anything is missing.
(B)Lossy compression can compress data down and information gets deleted
(C)Data compressed with lossy can be restored back to its original state
(D)All of the above

Question 15

True or False. Data compression is reducing the size (number of bits) of transmitted or stored data. Fewer bits does not necessarily mean less information.

Question 16

A binary number is to be transformed by appending, (adding), 2 zeros to the end of the number. For example, 11 is transformed to 1100. Which of the following correctly describes the relationship between the transformed number and the original number?
(A)The transformed number is 4 times the value of the original number
(B)The transformed number is 8 times the value of the original number
(C)The transformed number is 16 times the value of the original number
(D)The transformed number is 10,000 times the value of the original number