Specimen Paper-1 2023

convert 97 to binary

• 0 1 1 0 0 0 0 1

• 1 0 0 0 0 1 1 1

• 1 1 0 0 1 1 0 1

• 0 0 0 1 1 1 1 1

convert 5C to binary

• 0 1 0 1 1 1 0 0

• 0 1 0 1 1 1 1 1

• 0 1 0 1 1 0 0 0

• 0 0 1 0 0 1 1 1

What is meant by Mac Address

select the right ones

• used to identify a device

• it is a unique (address)

• it is set by the manufacturer

• it does not change

• locations in memory

Give two uses of Hexadecimal in computer science:

• assembly language

• error messages

• used to identify a device

• it is set by the manufacturer

what are the contents of 0 1 0 1 0 0 1 0 after a two logical left shifts

• 0 1 0 0 1 0 0 0

• 1 0 1 1 0 1 1 1 1

• 0 1 0 1 1 0 1 1

• 1 0 1 0 1 0 1 0

State one effect this logical shift has on the binary value.

• The value becomes incorrect because the left most bits are lost. 1

• the server is unable to respond

• consists of values between 0–255

• It sends control signals

what is the binary for the denary value −54.

use 2's complement

• 1 1 0 0 1 0 1

• 1 1 0 0 1 0 0

• 1 0 1 0 0 1 1

• 0 1 0 0 1 0 0 1

Describe the structure of a data packet:

select the right ones

• it has a header that contains the destination address

• it has a payload

• it has a trailer.

• header has data that can be uploaded and downloaded

which statement is a benefit of compressing the videos before uploading.

• Data is encrypted.

• Duration of each video will be reduced

• Less storage space on the web server is required

• More bandwidth is required when viewing the videos

Give two methods of compression that could be used to compress the videos.