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3. Hardware
A section of Computer Science, 2210
Listing 10 of 109 questions
A mobile telephone has built-in input and output devices. Give two examples of an input device that would be built into a mobile telephone. Give one example of an output device that would be built into a mobile telephone. The data storage in the mobile telephone can be measured using different units of measurement. State how many bits are equal to a byte. State how many kibibytes (KiB) equal a mebibyte (MiB). The mobile telephone has an operating system. Describe the purpose of the operating system.
2210_w23_qp_13
THEORY
2023
Paper 1, Variant 3
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Four input devices, four descriptions and four applications are shown below. Draw a line to connect each input device to its correct description. Then connect each description to its correct application. Input device Description Application barcode reader copies paper documents and converts the text and pictures into a computer-readable form voice recognition microphone reads labels containing parallel dark and light lines using laser light or LEDs; the width of each line represents a binary code reading passports pH sensor detects changes in acidity levels; data is often in analogue form automatic stock control scanner device that allows audio signals to be converted into electric signals; these can be interpreted by a computer after being converted into digital form monitor soil in a greenhouse
2210_s15_qp_12
THEORY
2015
Paper 1, Variant 2
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A keyboard is a type of input device that can be used to enter data into a computer. Complete the paragraph that describes one method of operation for a keyboard, using the most appropriate terms from the given list. Not all terms in the list need to be used. • Binary • Breaks • Calculated • Character • Circuit • Current • Information • Network • Press • Processor • Signal • Switch A keyboard has a key matrix underneath the keys. When a key is pressed, it presses a that completes a . This allows to flow. The location of the key pressed is . The location of the key pressed is compared to a map to find the value for the key that has been pressed.
2210_s21_qp_12
THEORY
2021
Paper 1, Variant 2
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A section of computer memory is shown below: Address Contents 1000 0000 0110 1110 1000 0001 0101 0001 1000 0010 1000 1101 1000 0011 1000 1100 1000 1100 1000 1101 1000 1110 1000 1111 The contents of memory location 1000 0001 are to be read. Show the contents of the Memory Address Register (MAR) and the Memory Data Register (MDR) during this read operation: MAR MDR The value 0111 1001 is to be written into memory location 1000 1110. Show the contents of the MAR and MDR during this write operation: MAR MDR Show any changes to the computer memory following the read and write operations in part and part . Address Contents 1000 0000 0110 1110 1000 0001 0101 0001 1000 0010 1000 1101 1000 0011 1000 1100 1000 1100 1000 1101 1000 1110 1000 1111 Name three other registers used in computers. The control unit is part of a computer system. What is the function of the control unit?
2210_w15_qp_13
THEORY
2015
Paper 1, Variant 3
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Selma writes the following four answers in her Computer Science examination. State which computer terms she is describing. “It is a signal. When the signal is received it tells the operating system that an event has occurred.” Selma is describing “It takes source code written in a high level language and translates it into machine code. It translates the whole of the source code at once.” Selma is describing “The part of the central processing unit (CPU) that carries out calculations.” Selma is describing “When data is transmitted, if an error is detected in the data received a signal is sent to ask for the data to be retransmitted. This continues until the data received is correct.” Selma is describing
2210_w17_qp_12
THEORY
2017
Paper 1, Variant 2
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Five statements are given about devices. Tick (✓) to show if each statement applies to a 3D scanner, barcode reader or a Quick Response (QR) code reader. Some statements may apply to more than one type of device. Statement 3D scanner (✓) Barcode reader (✓) QR code reader (✓) uses position and alignment markers for orientation when scanning scans the shape and appearance of an object uses reflected light from a laser to convert a black-and-white pattern into binary can often be built into an Electronic Point Of Sale (EPOS) terminal, for example, a supermarket checkout it is an example of an input device
2210_w21_qp_12
THEORY
2021
Paper 1, Variant 2
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Six descriptions and six devices are shown below. Draw a line to link each description to the correct device. Allows a user to write on a surface using a pen; text and drawings are then captured electronically and stored for later use. Interactive whiteboard Description Converts sound into an electrical signal/voltage. Uses thermal bubble and piezoelectric technology to produce a hard copy. Uses a bright white light source and micro mirrors (on a chip) to produce an image to be shone onto a wall or screen. Converts a hard copy document into an electronic form to be stored as a file on a computer. Uses negatively charged images on a rotating drum and positively charged toner to output a hard copy. Inkjet printer Digital Light Projector Laser printer Microphone Scanner (2D) Device
2210_s16_qp_12
THEORY
2016
Paper 1, Variant 2
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The diagram shows five output devices and five descriptions. Draw a line between each output device and its description. Output Device Description Inkjet printer Flat panel display that uses the light modulating properties of liquid crystals. LCD screen Flat panel display that uses an array of light‑emitting diodes as pixels. 2D cutter Droplets of ink are propelled onto paper. LED screen Electrically charged powdered ink is transferred onto paper. Laser printer High powered laser that uses the x-y plane. 
2210_s17_qp_12
THEORY
2017
Paper 1, Variant 2
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Questions Discovered
109