The Year 9 Quiz

Convert decimal 47 to 8-bit binary

• 100100

• 2F

• 101111

• 00101111

A hexadecimal digit

• Represents 2 binary digits

• Represents 4 binary digits

• Represents 6 binary digits

• Represents 8 binary digits

In a hospital emergency room, patient records are accessed as the need arises.

• Serial access is ideal

• Serial and direct access are equally suitable

• Direct access is ideal

• None of the above are true

Most systems implement relational databases rather than flat files because

• Relational databases involve less data redundancy

• Relational databases make it easier to implement security measures

• Relational databases are simpler to update

• All of the above are true

When A = 0, B = 1 and C = 1

• D = 0 and E = 0

• D = 0 and E = 1

• D = 1 and E = 0

• D = 1 and E = 1

Which of the following is true about raster images?

• They have a specific number of pixels

• They are images composed of paths

• They do not get blurry when enlarged

• None of the above is true

We generally prefer 24-bit to 16-bit colour representation because

• a 24-bit image has a higher resolution

• 24-bit representation can display many more colours

• A 24-bit image has less colour depth

• A 24-bit image takes up less storage space

This is a part-algorithm for a password-protected app. Which variable determines how many tries the user is given?

• c

• guess

• password

• none of the above

How many decisions are there in this flowchart?

• 1

• 2

• 3

• 4

If the user doesn't guess the password, what will be the end-condition for this loop?

• guess = 3

• guess = password

• password = Year 9

• c = 0