Daily Practice · GCSE Computer Science
January 2017 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in January 2017, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in January 2017
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st January 2017Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 2nd January 2017A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.
- 3rd January 2017Define the term 'interrupt' as used to describe a signal received by a CPU.
- 4th January 2017An 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 January 2017Evaluate X = NOT A AND B when A = 0 and B = 1.
- 6th January 2017Convert the hexadecimal number FF to an 8-bit binary number.
- 7th January 2017Give one advantage of a star topology compared with a mesh topology.
- 8th January 2017Explain the purpose of a breakpoint.
- 9th January 2017Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 10th January 2017State the three stages of the fetch-decode-execute cycle in the order they occur.
- 11th January 2017State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 12th January 2017Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 13th January 2017Define the term 'pixel'.
- 14th January 2017Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 15th January 2017Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 16th January 2017Evaluate the expression 23 DIV 4.
- 17th January 2017State the correct order of the three operations used to read data from a text file.
- 18th January 2017A 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 January 2017Name the four layers of the TCP/IP model in order from the one closest to the user.
- 20th January 2017A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 21st January 2017A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
- 22nd January 2017A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 23rd January 2017An 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 January 2017Complete: NOT 0 = ?
- 25th January 2017Convert the denary number 200 to hexadecimal, showing your working.
- 26th January 2017State what LAN stands for.
- 27th January 2017A 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.
- 28th January 2017An 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 January 2017Which CPU register holds the address of the next instruction to be fetched?
- 30th January 2017Distinguish between the network security threats known as phishing and pharming.
- 31st January 2017An array named temps holds 12 values. State the index of the first item and the index of the last item.