DSE ICT Unit A1

Which of the following are components of an information system?

• Software

• Network

• Compliance

Which of the following is an example of data collection?

• Reading the card ID from an Octopus card

• Summarising the data of a spreadsheet using pivot table

• Conducting a survey on voters' preferences before an election

• Posting a photo on social media

Which of the following personnels is responsible for performing backup of an information system?

• System analyst

• Programmer

• User

• Technician

Which of the following is not a valid way to improve students' information literacy?

• After searching for an information, find other sources to validate its authenticity

• Searching for the PDF version of a textbook

• Citing a research paper for an article for the school's newspaper

• Analysing data provided by data.gov.hk

Which of the following is/are (a) method(s) of control that ensures the reasonableness of the data input?

• Requires the user to pass a CAPTCHA when registering an account

• Ensures the password user enters is at least 8 characters long

• Requires the user to select a country from a drop-down menu

The same parity check has been applied in the transmission of the data received is erroneous. Which one is it?

• 0111 0001

• 1010 1100

• 1100 1111

• 1110 0110

There are 60,000 employees in a company. What is the minimum number of bits to represent the staff ID of all employees?

• 16

• 17

• 18

• 19

The following binary numbers are represented in 8-bit two's complement. Arrange the following numbers in ascending order.
(1) 0110 1011

(2) 1011 0011

(3) 1100 1000

(4) 0001 0100

• (1), (2), (3), (4)

• (1), (4), (2), (3)

• (2), (3), (4), (1)

• (3), (2), (4), (1)

Which of the following statements regarding character coding system is/are correct?

• Unicode contains more characters than Big-5.

• We can define new characters in Unicode.

• ASCII is used to represent Korean characters.

• All of the above

The following is a 6×6 display board. Each pixel, represented by 2 bits each, has 4 states: red, green, blue, and off. How many patterns can this display board illustrate?

• 36

• 72

• 2^36

• 2^72