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8th Odd 1

True/False
Indicate whether the statement is true or false.

1.

AA hex is between A8 and B0.

Multiple Choice
Identify the choice that best completes the statement or answers the question.

2.

What is the result of adding 2 to the hex number DF8?
 a. DF0 c. DF9 b. E00 d. DFA

3.

The word vim can be represented in a number of ways.  They include: Why do computer scientists often prefer hexadecimal over the other representations?
 a. Early typesetting procedures that predate modern computing used a base-16 system to represent alpha-numeric characters. b. Computers, at their most basic, use hexadecimal c. hexadecimal uses fewer digits than binary. d. hexadecimal representations use letters as well as numbers.

4.

What is the decimal value of the hex number A0?
 a. 160 b. 150 c. 256 d. None of these

5. a. 247 b. 127 c. 715 d. 85

6.

What is the decimal value of the octal number 20?
 a. 15 b. 8 c. 16 d. 17

7. a. 7 b. 18 c. 21 d. 20

8.

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. Some large numbers cannot be represented in binary and can only be represented in decimal. c. Groups of bits can be used to represent abstractions, including but not limited to numbers and characters. d. The same value (number) can have a different representation depending on the number system used to represent it. 9.

ASCII is a character-encoding scheme that uses a numeric value to represent each character. For example, the uppercase letter “G” is represented by the decimal (base 10) value 71. A partial list of characters and their corresponding ASCII values are shown in the table below.

ASCII characters can also be represented by hexadecimal numbers. According to ASCII character encoding, which of the following letters is represented by the hexadecimal (base 16) number 4C?
 a. Y b. A c. L d. V

10.

Two students have developed a protocol in which they send 4-bit messages to each other. They decide to modify their protocol to start sending 8-bit messages instead. How many more values can be represented in an 8-bit message than a 4-bit message?
 a. 2 = 2 times as many values b. 2 = 8 times as many values c. 2 = 16 times as many values d. 2 = 4 times as many values

11.

What is the result of subtracting 1 from the Octal number 517?
 a. 527 c. 518 b. 516 d. 520

12.

What is the decimal value of the hex number 1C?
 a. 28 b. 34 c. 66 d. None of these

13.

What is the decimal value of 1011?
 a. 8 c. 10 e. 12 g. 14 b. 9 d. 11 f. 13 h. 15

14.

What is the decimal value of 100?
 a. 0 c. 2 e. 4 g. 6 b. 1 d. 3 f. 5 h. 7

15.

Rachel is planning on writing code that will have to do computation with very large numbers.  Which of the following is the most important issue she should check before writing her code?
 a. Rachel should look up how many bits are used to store integers and floating point numbers in the programming language she is using. b. Rachel should reset her machine to store data using hexadecimal values instead of binary values. c. Rachel doesn’t have to worry about the size of numbers. d. Rachel should run a program to ensure that she has enough memory on her machine just to run the program itself.

16.

What is the decimal value of binary 010?
 a. 0 c. 2 e. 4 g. 6 b. 1 d. 3 f. 5 h. 7

17.

8 bits is enough to represent 256 different numbers. How many total bits do you need to represent 512 (twice as many) numbers?
 a. 16 bits b. 17 bits c. 9 bits d. 10 bits

18.

What is the decimal value of 111?
 a. 0 c. 2 e. 4 g. 6 b. 1 d. 3 f. 5 h. 7

19. a. hexadecimal b. binary c. octal d. decimal

20.

The following images shows four different representations of data.  Which of the following is the lowest level of abstraction? a. Binary digits: 0111 1111 0100 1111 1100 1001 b. Hexadecimal digits: #7F4FC9 c. d. Characters/word: PURPLE

21.

What is the decimal value of binary 011?
 a. 0 c. 2 e. 4 g. 6 b. 1 d. 3 f. 5 h. 7

22.

What is the decimal value on the ASCII table for a space?
 a. 32 b. 65 c. 97 d. 48

Multiple Response
Identify one or more choices that best complete the statement or answer the question.

23.

Which of the following can be represented by a single binary digit?
 a. if a grade is passing or failing b. any integer modulus 2 c. the temperature outside d. the score on a math test

Completion
Complete each statement.

24.

What is the next binary number after 1000?

25.

What is the next binary number after 0111?

26.

What is the next binary number after 1001?

27.

What is the next binary number after 1110?

28.

2 = ?

29.

What is the decimal value of octal 10?

30.

What is the next binary number after 0101?

31.

What does binary 1101111 equal in hex?

32.

2 = ?

33.

What does binary 1101011 equal in octal?

34.

2 = ?

35.

The ASCII value for a space is _____?

36.

What is the next octal number after 7?

37.

What is the next binary number after 0101?

38.

The ASCII value for the digit 0 is _____?

39.

What is the decimal value of octal 1750?

40.

What does binary 1101110 equal in hex?

41.

What is the next binary number after 0010?

42.

What is the next hex number after 6BF?

43.

What does binary 101111 equal in octal?

44.

What is the decimal value of hex AD?

Matching

 a. Bandwidth e. Protocol b. Bit f. binary c. Bit rate g. Abstraction d. Latency h. ASCII

45.

A set of rules governing the exchange or transmission of data between devices.

46.

Transmission capacity measure by bit rate

47.

Time it takes for a bit to travel from its sender to its receiver.

Problem

48.

Convert the following binary number to a decimal number.
01010111

49.

Convert the following binary number to a decimal number.
01010110

Essay

50.

Count to 15 in binary.