0478/13 · Oct/Nov 2024
Download PDFData can be measured using different units of storage.
Tick (✓) one box to show which of the following is the largest unit of data storage. A tebibyte (TiB) B pebibyte (PiB) C mebibyte (MiB) D gibibyte (GiB)
A computer has primary storage. Give one example of primary storage. Explain the purpose of your chosen example. Example .................................................................................................................................... Explanation ............................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ...................................................................................................................................................
All data is converted to binary to be processed by a computer. Calculate the binary number for the denary number 175. Show all your working.
Give the binary number for the given hexadecimal numbers. 15 ...................................................................................................................................... 2D ...................................................................................................................................... 091 .................................................................................................................................... Working space
Binary integers can be added together. Add the two binary integers using binary addition. Show all your working. Give your answer in binary. 1 1 1 0 0 0 1 1 + 1 1 0 0 1 1 0 0
Calculate the denary number for the two's complement binary integer 10001110. Show all your working.
An employee has a report that they need to email to their employer. The employee compresses the report file before emailing it.
State the effect the compression has on the report file.
Give two benefits of compressing the report file before emailing it. 1 ................................................................................................................................................ ................................................................................................................................................... 2 ................................................................................................................................................ ...................................................................................................................................................
The employee decides to use lossless compression to compress the file. Explain why lossy compression is not suitable.
When the employee enters the email address, the computer uses Unicode to convert the email address to binary. State what Unicode is an example of.
Give two advantages of the computer using Unicode instead of American standard code for information interchange (ASCII). 1 ........................................................................................................................................ ........................................................................................................................................... 2 ........................................................................................................................................ ...........................................................................................................................................
Give one disadvantage of the computer using Unicode instead of ASCII.
The report is broken down into packets to be emailed. Circle three items of data that can be found in the packet header. trailer originator's address payload interrupt input operating system destination address antivirus packet number
Each packet is sent along a different path from the employee's device to the employer's device. Tick (✓) one box to show the name of this method of sending packets. A packet networking B packet circuiting C packet switching D packet transferring
A hardware device is used to control the path that each packet takes. Give the name of this hardware device.
The email data is checked for errors after it has been transmitted, using an echo check and a checksum. Explain how the echo check is used to check for errors in the email data.
In the checksum error detection method, two values are compared after transmission. If the values do not match, an error is detected. Explain why the values not matching would show an error has occurred.
The email data is encrypted using asymmetric encryption before it is sent. Give one reason why the email data is encrypted.
Give one similarity between symmetric encryption and asymmetric encryption.
Give two differences between symmetric encryption and asymmetric encryption. 1 ........................................................................................................................................ ........................................................................................................................................... 2 ........................................................................................................................................ ...........................................................................................................................................
An instruction is fetched from random access memory (RAM) into the memory data register (MDR) to be decoded.
Identify two other registers that are used in the fetch stage of the cycle. 1 ................................................................................................................................................ 2 ................................................................................................................................................
Complete and annotate the diagram to show how the data is decoded once it has been fetched into the MDR.
Complete the table to give the missing term or description for the internet terms.
| Internet term | Description |
|---|---|
| .................................................. | the collection of web pages accessed using the internet |
| .................................................. | the address given to a device when it connects to the internet |
| web browser | ...........................................................................................<br>...........................................................................................<br>........................................................................................... |
| .................................................. | the hardware that stores a database of matching website and IP addresses |
| .................................................. | a type of hardware that can be used to prevent a distributed denial of service (DDoS) attack |
| hacking | ...........................................................................................<br>...........................................................................................<br>........................................................................................... |
A farmer has a plough that is an automated system. The plough is used to dig the ground in a field to prepare it for planting seeds. The plough uses sensors and a microprocessor to maintain a straight line when digging the ground.
State what is meant by an automated system.
Describe the role of the microprocessor in this process.
Give two benefits to the farmer of using an automated system for this purpose. 1 ................................................................................................................................................ ................................................................................................................................................... 2 ................................................................................................................................................ ...................................................................................................................................................
The plough uses artificial intelligence (AI) to navigate its way around the field. Explain how the plough makes use of AI for this purpose.
Complete the statements about cookies. Use only terms from the list. Not all terms need to be used. Some terms may be used more than once. binary close denary expire hexadecimal image malware operating system permanent persistent session sound temporary web browser Cookies are small text files that are stored by a ....................................................... . ....................................................... cookies are ....................................................... text files that are deleted when the ....................................................... is closed. ....................................................... cookies are ....................................................... text files that are stored on a user's secondary storage device until they are manually deleted or they ....................................................... .
Give three examples of the use of cookies. 1 ................................................................................................................................................ ................................................................................................................................................... 2 ................................................................................................................................................ ................................................................................................................................................... 3 ................................................................................................................................................ ...................................................................................................................................................
A computer programmer uses an integrated development environment (IDE) when creating a computer program. Explain the purpose of the IDE.