Mid-Term 2024 Grade 8

Which datatype is used to store a date in a database?

• Text

• Integer

• Date

Convert 11110 into decimal.

(Write the anwer below)

Perform the binary subtraction for 1101 - 1011.

How many megabytes are in a gigabyte?

Which SQL statement is used to extract data from a database?

• GET

• EXTRACT

• SELECT

Convert 11111100 into hexadecimal.

(Write answer below)

What is a primary key in a database?

• A key that uniquely identifies a row in a table

• A key that can accept null values

• A key used to link two tables together

Which SQL statement is used to delete records from a table?

• REMOVE

• DELETE

• DROP

Perform the binary addition for 111 + 11 + 10000.

(Write answer below)

An image requires the use of 68 colours. How many bits are required to represent these 68 colour patterns?