Q78.
Section
b
7-1 Basic theory
Answer
Explanation
This calculation separates the quotients and remainders of the divisions.
If the 8-digit date data is divided by 10000, the month and day can be extracted from the remainder.
20071021 ÷ 10000 = 2007 ··· Remainder 1021
Therefore, (D%10000) is the formula for extracting the month and day.
If this remainder is divided by 100, the month can be extracted as the quotient and the day can
be extracted as the remainder.
1021 ÷ 100 = 10 ··· Remainder 21
Therefore, these are represented in the following formula:
(D% 10000) / 100
Q79.
Section
a
9-5 Security
Answer
Explanation
Social engineering is the act of fraudulently obtaining passwords and other confidential information from individuals within an organization without using networks or other electronic
means, by pretending that there is an emergency situation or some other form of deception.
Q80.
Section
b
8-3 Software
Answer
Explanation
The following setting method can be read from the trial results:
① (0)8 = (000)2 : No type of access was allowed.
② (3)8 = (011)2 : Read and update access was allowed, but create access was not allowed.
③ (7)8 = (111)2 : All types of access were allowed.
From this, the setting of access rights is as follows:
(111)2
Indicates read or update access rights.
Indicates create access rights.
From the above results, if the octal numbers in the answers are written as binary numbers,
a) : (2)8 = (010)2 Read or update access rights only.
b) : (4)8 = (100)2 Create access rights only
c) : (5)8 = (101)2
“Create and update” or “create and read” access rights.
d) : (6)8 = (110)2
Therefore, the correct answer is b).
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Q81.
d
Section
8-1 Computer component
Answer
Explanation
A characteristic of USB is that up to 127 peripheral devices can be connected in a tree shape
using a USB hub.
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