February b
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Choose 1 benefit of having a numeric value represented in Hexadecimal instead of Binary.
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1 point
Not all numeric values can be represented in Binary.
Compilers will transform all numeric values to Hexadecimal to make them readable by the CPU
Hexadecimal format takes up less storage space in memory and in files.ion 2
Hexadecimal is a newer format and is recognized by more programming languages.
You are asked to create a database that tracks items for a retail store. The store currently uses 7bit binary barcodes to uniquely identify each item for sale. Which of the following best describes the result of increasing the barcode length from 7 bits to 8 bits?
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1 point
10 times as many items can be uniquely identified.
8 more items can be uniquely identified.
8 times as many items can be uniquely identified
2 times as many items can be uniquely identified.
Which of the following accurately defines a binary question?
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1 point
A question which can be answered in only one of two possible ways.
A question with only one answer
Two questions sharing the same answer.
A question with multiple choice answers.
With 8 bits, it is possible to represent 256 different integer values. How many bits do you need to represent twice as many integer values (512)?
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1 point
16
12
10
9
Which of the following only requires a single bit of storage to represent the data?
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1 point
Any number modulo 2
The temperature outside
Hertz (hz)
A score on a math test
Which of the following is one way to describe abstraction in computer programming?
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1 point
Adding detailed comments to help a programmer read the code easily.
Giving meaningful names to a set of statements (function/procedure/method) that accomplish a particular task.
Creating a series of smaller programs rather than one large set of code.
Using global variables whenever possible to allow values to be easily accessed.
Fred is working in a computer programming language. When he subtracts 0.1 from 0.3, he gets a result of .1999999999999998. Why did Fred get this result and not, 0.2?
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1 point
This is a bug in the programming language.
A fixed number of bits representing real numbers, as floating point values, limits some mathematical operations and leads to potential rounding errors.
None of the above
Numbers are not rounded up in programming languages.
Other:
Which of the following are equivalent representations of the same number?
0 points
Binary: 11010, Hexadecimal: FF, Decimal 32
Binary: 1010, Hexadecimal: A, Decimal: 11
Binary: 1101, Hexadecimal: BB, Decimal: 13
Binary: 1110, Hexadecimal E, Decimal 14
Which of the following can be represented in a binary state: (I) a power supply, (II) voting on a house bill, (III) a byte of data, (IV) a trend
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1 point
I and II
III and Iv
II and III
I and IV
How many binary place values are required for the sum of decimal numbers 2 and 6?
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1 point
4
3
2
5
What is Abstraction?
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1 point
Breaking data
Mathematical operations
Complexity made simple
Step by step instructions
Which of the following are equivalent? (I) Binary: 11110, (II) Hexadecimal: 1E, (III) Decimal: 24
1 point
I and II
I and III
II and III
II and I
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