2210_s19_qp_12
A paper of Computer Science, 2210
Questions:
10
Year:
2019
Paper:
1
Variant:
2
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3
Vanessa writes a paragraph as an answer to an examination question about the central processing unit (CPU). Use the list given to complete Vanessa’s answer by inserting the correct six missing terms. Not all terms will be used. • Components • Data • Decoded • Executed • Fetched • Instructions • RAM • ROM • Secondary storage The CPU processes and . An instruction is from into the CPU where it is then . Once this has taken place the instruction is then .
3. Hardware  →  3.1. Computer architecture
Open
4
Marley wants to store a video he has created for his school project. He considers using a DVD or a Blu-ray to store the video. Explain two differences between a DVD and a Blu-ray. Marley also needs to store ten 8-bit colour images in a file for his project. Each image is 500 pixels wide and 300 pixels high. Calculate the total file size in megabytes (MB) for all Marley’s images. Show all your working. File size MB Marley prints the images for his project using an inkjet printer. Describe how the inkjet printer prints an image.
1. Data representation  →  1.3. Data storage and compression
1. Data representation  →  1.2. Text, sound and images
Open
5
A music company wants to send a new music file to many radio stations. It will send the music file the day before the release date so that the radio stations can store the file ready for release. The music company does not want the radio stations to be able to open the music file until 09:00 on the release date. Identify two security measures and describe how each measure can be used to make sure the music file cannot be opened until the release date. Security measure 1 Description Security measure 2 Description
5. The internet and its uses  →  5.3. Cyber security
8. Programming  →  8.3. File handling
Open
6
Priya creates a website to sell her old comic books and superhero figures. She uses HTML to create her website. The HTML she produces has both structure and presentation. Explain what is meant by HTML structure and presentation. Include an example of each. Structure Presentation Priya uses cookies in her website. Five statements are given about cookies. Tick (✓) to show if the statement is True or False. Statement True (✓) False (✓) Cookies can be used to store a customer’s credit card details Cookies can be used to track the items a customer has viewed on a website Cookies will corrupt the data on a customer’s computer Cookies are downloaded onto a customer’s computer Cookies can be deleted from a customer’s computer Priya stores her website on a webserver. To transmit the website data to the webserver she uses parallel duplex data transmission. Describe how data is transmitted using parallel duplex data transmission. Priya has a URL for her website. State what is meant by a URL. Priya is concerned about a denial of service attack (DoS) occurring on her webserver. Explain what is meant by a denial of service attack. Give one security device that can be used to help prevent a denial of service attack.
5. The internet and its uses  →  5.1. The internet and the world wide web
Open
7
An office has an automated lighting system. When movement is detected in the office the lights are switched on. If movement is not detected for a period of 2 minutes the lights are switched off. The system uses a sensor and a microprocessor. Describe how the automated lighting system uses a sensor and a microprocessor. A microprocessor uses ROM. Explain what is meant by ROM.
6. Automated and emerging technologies  →  6.1. Automated systems
3. Hardware  →  3.1. Computer architecture
Open
9
The contents of three binary registers have been transmitted from one computer to another. Even parity has been used as an error detection method. The outcome after transmission is: Register A and Register C have been transmitted correctly. Register B has been transmitted incorrectly. Complete the Parity bit for each register to show the given outcome. Parity bit Register A Register B Register C
2. Data transmission  →  2.2. Methods of error detection
1. Data representation  →  1.1. Number systems
Open