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A washing machine has a small display screen built into it. One use of the display screen is to show an error code when a problem has occurred with a washing cycle. State whether the display screen is an input, output or storage device. The display screen shows a hexadecimal error code: E04 This error code means that the water will not empty out of the washing machine. Convert this error code to binary. State why hexadecimal is used to display the error code. Identify three sensors that could be used in the washing machine. State what each sensor could be used for. Sensor 1 Use Sensor 2 Use Sensor 3 Use

3. Hardware  →  3.2. Input and output devices

1. Data representation  →  1.1. Number systems

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2

Data files are stored in different file formats. Complete the table by providing a suitable file format for each file type. The first one has been done for you. File type File format Pictures .JPEG Text Sound Video

1. Data representation  →  1.3. Data storage and compression

8. Programming  →  8.3. File handling

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3

An example of a Uniform Resource Locator (URL) is: http://www.cie.org.uk/index.htm Part 1 Part 2 Part 3 Identify the three parts that make up this URL. Part 1 Part 2 Part 3 Describe what is meant by an Internet Protocol (IP) address.

5. The internet and its uses  →  5.1. The internet and the world wide web

3. Hardware  →  3.4. Network hardware

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4

Six components of a computer system and six descriptions are shown. Draw a line to match each component with the most suitable description. Component Description Arithmetic Logic Unit (ALU) Buses Control Unit (CU) Immediate Access Store (IAS) Input/Output Registers Used to connect together the internal components of the CPU. Used to carry out calculations on data. Used to temporarily hold data and instructions during processing. Used to allow interaction with the computer. Used to hold data and instructions before they are processed. Used to manage the flow of data through the CPU.

3. Hardware  →  3.1. Computer architecture

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5

Draw a logic circuit for the logic statement: X = 1 if ((A is 1 AND B is 1) OR (A is NOT 1 AND C is 1)) A B X C Draw the symbol for an XOR gate and explain the function of this logic gate. Explanation

10. Boolean logic  →  10. Boolean logic

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6

Describe the operation of a 2D scanner and a 3D scanner. 2D 3D

3. Hardware  →  3.2. Input and output devices

6. Automated and emerging technologies  →  6.2. Robotics

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7

Six statements about firewalls are shown. Tick (3) to show whether each statement is true or false. Statement true (3) false (3) Firewalls can monitor incoming and outgoing traffic. Firewalls operate by checking traffic against a set of rules. Firewalls cannot block access to a certain website. Firewalls can be software and hardware. Firewalls can act as intermediary servers. Firewalls can block unauthorised traffic.

5. The internet and its uses  →  5.3. Cyber security

3. Hardware  →  3.4. Network hardware

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8

Data is valuable. It needs to be kept secure and it can easily be damaged. Give three different ways that data can be accidentally damaged. The Secure Socket Layer (SSL) protocol can be used to securely transmit data in online banking. State three other different applications that use SSL. Application 1 Application 2 Application 3 Online banking is increasing in popularity. Online banking can be a risk as it can raise a number of security issues. SSL can be used as a security method to make online banking safer. Identify and describe three other security methods that could be used to make online banking safer. Security method 1 Security method 2 Security method 3

5. The internet and its uses  →  5.3. Cyber security

2. Data transmission  →  2.1. Types and methods of data transmission

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9

Optical storage media can be used to store data. Describe how the data is read from a Compact Disc (CD). Kamil wants to store a 16-bit colour image file. The image size is 1000 pixels. Calculate the size of the file. Give your answer in bytes. Show your working. Working Answer bytes Describe the differences between primary and secondary storage.

1. Data representation  →  1.3. Data storage and compression

3. Hardware  →  3.3. Data storage

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10

Six statements about assembly language are shown. Tick (3) whether the statement is true or false. Statement true (3) false (3) Assembly language uses mnemonic codes. Assembly language programs do not need a translator to be executed. Assembly language is a low-level programming language. Assembly language is specific to the computer hardware. Assembly language is machine code. Assembly language is often used to create drivers for hardware.

4. Software  →  4.2. Types of programming language, translators and integrated development environments (IDEs)

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