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Google IT Support Professional Certificate • STUDY MODE

BINARY

QUESTION 1 OF 11

Which of these is a valid byte? Check all that apply.

A
00000000Correct Answer
B
10022011 (Wrong)
C
11100 (Wrong)
D
11011011Correct Answer
Explanation:

Great job! A byte is composed of eight bits of zeros and ones.

QUESTION 2 OF 11

How many possible values can we have with 8 bits?

A
256Correct Answer
B
8
C
1 byte
D
127
Explanation:

Great job! Bits use the binary system, which is also known as the base-2 numeral system. So 2^8 allows us 256 values from 0 to 255.

QUESTION 3 OF 11

Why did UTF-8 replace the ASCII character-encoding standard?

A
UTF-8 can store a character in more than one byte.Correct Answer
B
UTF-8 only uses 128 values.
C
ASCII can store a character in more than one byte.
D
ASCII can represent emoji.
Explanation:

Wohoo! UTF-8 replaced the ASCII character-encoding standard because it can store a character in more than a single byte. This allowed us to represent a lot more character types, like emoji.

QUESTION 4 OF 11

What is the highest decimal value we can represent with a byte?

A
256
B
2
C
255Correct Answer
D
Any number
Explanation:

Explanation! There are 256 values in a byte, from the decimal number 0 to 255.

QUESTION 5 OF 11

The binary value of the ASCII letter "c" is 0110 0011. Using the handy chart that we learned in the lesson, convert this number to its decimal value. You)ll need to use some math for this question.

A
45
B
99Correct Answer
C
123
D
100
Explanation:

Great job! The decimal value 99 is same as the binary value 0110 0011. So the numbers that are turned ON are 64, 32, 2, and 1 and added up together. In other words, 64 + 32 + 2 + 1 = 99.

QUESTION 6 OF 11

What cards had holes in them that were historically used to store data?

A
Floppy disks
B
Hard drive platters
C
Punch cardsCorrect Answer
D
Magnetic tape
Explanation:

Great job! Punch cards were the first binary system used for machines.

QUESTION 7 OF 11

A(n) ____ is a series of steps that solve specific problems.

A
recipe
B
automated system
C
combination
D
algorithmCorrect Answer
Explanation:

Right on! Algorithms are a series of steps that solve specific problems.

QUESTION 8 OF 11

What are the three main desktop operating systems used today? Check all that apply.

A
WindowsCorrect Answer
B
MacOSCorrect Answer
C
LinuxCorrect Answer
D
Chrome OS
Explanation:

Nice work! The main desktop operating systems in use today are Windows, Macintosh, and Linux.

QUESTION 9 OF 11

What is software called when it can be freely distributed, modified, and shared?

A
Open-sourceCorrect Answer
B
Closed-source
C
Commercial
D
Proprietary
Explanation:

Yep, commercial software is paid for, while open-source software can be freely distributed, modified, and shared.

QUESTION 10 OF 11

What does the following binary code translate to? Tip: Use an ASCII "character to binary" chart to help you find an answer. 01101000 01100101 01101100 01101100 01101111

A
Answer: Hello
QUESTION 11 OF 11

In punch card systems, a hole represents the number ____.

A
1Correct Answer
B
0
Explanation:

You nailed it! We use the number 1 to represent a hole in a punch card.

Ready to test your recall?

Which of these is a valid byte? Check all that apply.

💡Select all 2 correct answers before submitting (0 of 2 selected).
A
00000000
B
10022011 (Wrong)
C
11100 (Wrong)
D
11011011

How confident are you in this answer?