Daily Practice · GCSE Computer Science
January 1999 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in January 1999, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in January 1999
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 1999State the layer that IP operates in, and describe its job.
- 2nd January 1999State the term used for realistic data that a program would be expected to handle during normal use.
- 3rd January 1999Give one advantage of a relational database over a flat-file database.
- 4th January 1999State the difference between lossy and lossless compression.
- 5th January 1999State the condition that must be met before a binary search can be used on an array.
- 6th January 1999A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 7th January 1999Convert the hexadecimal number 3F to denary.
- 8th January 1999Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 9th January 1999Describe what syntax highlighting is and how it helps a programmer.
- 10th January 1999Convert the denary number 45 to hexadecimal.
- 11th January 1999What does the acronym CPU stand for?
- 12th January 1999State what the term malware means.
- 13th January 1999Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
- 14th January 1999An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
- 15th January 1999Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 16th January 1999Which piece of UK legislation controls how organisations must store and use people's personal data?
- 17th January 1999Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 18th January 1999A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
- 19th January 1999Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 20th January 1999Explain the role of TCP when a large file is downloaded.
- 21st January 1999A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 22nd January 1999A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 23rd January 1999State one function carried out by the operating system of a computer.
- 24th January 1999In computational thinking, what is meant by the term 'decomposition'?
- 25th January 1999Given A = 1 and B = 1, state the value of A AND B.
- 26th January 1999Convert the denary number 39 to an 8-bit binary number, showing your working.
- 27th January 1999Define a peer-to-peer network.
- 28th January 1999Give one advantage and one disadvantage of using a compiler.
- 29th January 1999Convert the denary number 5 to a 4-bit binary number.
- 30th January 1999A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 31st January 1999A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.