OCR COMPUTER SCIENCE J277
PAPER 1 QUESTIONS WITH
ACCURATE ANSWERS
State what is meant by a character set. - ANSWERSAll the different characters which a
computer can represent.
Layla uploads her images and videos to a website.
Explain why Layla compresses the images and videos before uploading them. -
ANSWERSReduces the file size so it takes up less space on the server. Faster upload
to the server, and faster download for users.
Describe the similarities and differences between a switch and a router. -
ANSWERSSimilarities: They both connect devices, they receive data from the devices,
they determine the correct destination for the data, they transmit the data to its
destination.
Differences: A switch uses MAC addresses, a router uses IPs, a switch corrects
nodes/computers, a router connects networks/Internet, a router stores the addresses of
devices attached... a switch records the addresses as they are accessed/ a switch has
to look for the correct address before sending.
Eve runs the defragmentation program on her computer.
Explain why Eve's computer is more efficient after the program has been run. -
ANSWERSTakes less time to read/access a file because the data/files/pages are
contiguous, so it does not need to move as far to read the next piece of data/file/page
because it is in the next memory location. It takes less time to save new data/files
because there is larger free space together so it does not need to split the data/file and
can store them in contiguous spaces.
Give two benefits to the customers of Eve choosing an open source licence. -
ANSWERSThe program would be free of charge, and they can adapt it/add features.
Give two benefits to Eve of choosing a proprietary licence. - ANSWERSShe can charge
customers/she can earn a profit and she can restrict what users can do/users cannot
edit it.
Describe the benefits of Eve of storing the program on the cloud. - ANSWERSShe can
access the program from anywhere, she does not need to carry a storage device with
her. Security/backup is managed for her, so she does not need to manually backup her
work.
PAPER 1 QUESTIONS WITH
ACCURATE ANSWERS
State what is meant by a character set. - ANSWERSAll the different characters which a
computer can represent.
Layla uploads her images and videos to a website.
Explain why Layla compresses the images and videos before uploading them. -
ANSWERSReduces the file size so it takes up less space on the server. Faster upload
to the server, and faster download for users.
Describe the similarities and differences between a switch and a router. -
ANSWERSSimilarities: They both connect devices, they receive data from the devices,
they determine the correct destination for the data, they transmit the data to its
destination.
Differences: A switch uses MAC addresses, a router uses IPs, a switch corrects
nodes/computers, a router connects networks/Internet, a router stores the addresses of
devices attached... a switch records the addresses as they are accessed/ a switch has
to look for the correct address before sending.
Eve runs the defragmentation program on her computer.
Explain why Eve's computer is more efficient after the program has been run. -
ANSWERSTakes less time to read/access a file because the data/files/pages are
contiguous, so it does not need to move as far to read the next piece of data/file/page
because it is in the next memory location. It takes less time to save new data/files
because there is larger free space together so it does not need to split the data/file and
can store them in contiguous spaces.
Give two benefits to the customers of Eve choosing an open source licence. -
ANSWERSThe program would be free of charge, and they can adapt it/add features.
Give two benefits to Eve of choosing a proprietary licence. - ANSWERSShe can charge
customers/she can earn a profit and she can restrict what users can do/users cannot
edit it.
Describe the benefits of Eve of storing the program on the cloud. - ANSWERSShe can
access the program from anywhere, she does not need to carry a storage device with
her. Security/backup is managed for her, so she does not need to manually backup her
work.
