Daily Practice · GCSE Computer Science
August 2003 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in August 2003, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in August 2003
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st August 2003Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 2nd August 2003Give one advantage of a relational database over a flat-file database.
- 3rd August 2003Define the term 'interrupt' as used to describe a signal received by a CPU.
- 4th August 2003An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
- 5th August 2003Evaluate X = NOT A AND B when A = 0 and B = 1.
- 6th August 2003Convert the hexadecimal number 3F to denary.
- 7th August 2003Give one advantage of a star topology compared with a mesh topology.
- 8th August 2003A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
- 9th August 2003Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 10th August 2003State the three stages of the fetch-decode-execute cycle in the order they occur.
- 11th August 2003State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 12th August 2003An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 13th August 2003Define the term 'pixel'.
- 14th August 2003Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 15th August 2003Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 16th August 2003Evaluate the expression 23 DIV 4.
- 17th August 2003A 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.
- 18th August 2003A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
- 19th August 2003State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 20th August 2003A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 21st August 2003A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 22nd August 2003A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 23rd August 2003An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
- 24th August 2003Complete: NOT 0 = ?
- 25th August 2003Convert the denary number 39 to an 8-bit binary number, showing your working.
- 26th August 2003State what LAN stands for.
- 27th August 2003State why a program written in a high level language must be translated.
- 28th August 2003An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
- 29th August 2003Which CPU register holds the address of the next instruction to be fetched?
- 30th August 2003Distinguish between the network security threats known as phishing and pharming.
- 31st August 2003Describe what a nested loop does when it processes a 2D array.