AP Computer Science Principles Unit 1-4 Assessments Questions & Answers 2023

AP Computer Science Principles Unit 1-4 Assessments Questions & Answers 2023 What is the best explanation for why digital data is represented in computers in binary? A. The binary number system is the only system flexible enough to allow for representing data other than numbers. B. It's easier, cheaper, and more reliable to build machines and devices that only have to distinguish between binary states. C. It typically takes fewer digits to represent a number in binary when compared to other number systems (for example, the decimal number system) D. It's impossible to build a computing machine that uses anything but binary to represent numbers - Correct Ans-B What is the 4-bit binary number for the decimal number Ten (10)? A. 0010 B. 1010 C. 0110 D. 0101 - Correct Ans-B What is the minimum number of bits you would need to encode the 26 letters of the alphabet plus a space - a total of 27 characters? A. 2 bits B. 3 bits C. 5 bits D. 6 bits - Correct Ans-C Number systems with different bases such as binary (base-2) and decimal (base-10) are all used to view and represent digital data. Which of the following is NOT true about representing digital data? A. At one of the lowest levels of abstraction, all digital data can be represented in binary using only combinations of the digits zero and one. B. The same value (number) can have a different representation depending on the number system used to represent it. C. Groups of bits can be used to represent abstractions, including but not limited to numbers and characters. D. Some large numbers cannot be represented in binary and can only be represented in decimal. - Correct Ans-D Consider the following three binary numbers: 01010 010000 1110 Which of the following lists the numbers in order from least to greatest? A. 010000 1110 01010 B. 01010 1110 010000 C. 01010 010000 1110 D. 1110 01010 010000 - Correct Ans-B A middle school is expanding to open a high school next year, doubling the total number of students. The school keeps a database in which each student's unique ID number is stored as an 8 bit number called studentID. Before the arrival of the new students almost every 8 bit number has already been assigned to a student. Of the options provided below, which is the smallest change to the way studentID is represented necessary to ensure each incoming student receives a unique ID? A. Add a bit to studentID to double the number of IDs that the database can represent. B. Double the number of bits in studentID to double the number of IDs that the database can represent C. Keep using an 8-bit number for studentID but reserve the first bit to indicate middle school or high school. D. Remove a bit from studentID to make room for incoming students - Correct Ans-A Which of the following is true about the way digital data is transmitted on the Internet? CONTINUES...