Daily Practice · GCSE Computer Science
July 1978 5-a-day
Every sheet in July 1978
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 1978A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 2nd July 1978Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
- 3rd July 1978State the typical maximum capacity of a single-layer DVD.
- 4th July 1978State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 5th July 1978State what is meant by a syntax error.
- 6th July 1978State what a foreign key is used for.
- 7th July 1978What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 8th July 1978Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 9th July 1978Given P = 0 and Q = 1, state the value of P OR Q.
- 10th July 1978A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
- 11th July 1978A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
- 12th July 1978State why a program written in a high level language must be translated.
- 13th July 1978Convert the 4-bit binary number 1101 to denary.
- 14th July 1978Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
- 15th July 1978State why an organisation might employ penetration testers to test its network.
- 16th July 1978Describe what a nested loop does when it processes a 2D array.
- 17th July 1978State one example of a file format that commonly uses lossy compression.
- 18th July 1978State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 19th July 1978State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 20th July 1978Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 21st July 1978State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 22nd July 1978Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 23rd July 1978Give two reasons why network communication is divided into layers.
- 24th July 1978Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 25th July 1978A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
- 26th July 1978Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
- 27th July 1978Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 28th July 1978State the two values a Boolean data type can hold.
- 29th July 1978State how many different values can be represented using 5 bits, and explain your reasoning.
- 30th July 1978Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 31st July 1978Explain why an interpreter is often preferred while a program is being written.