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3.1. Computers and their components
A subsection of Computer Science, 9618, through 3. Hardware
Listing 3 of 3 questions
A computer has hardware and software. The hardware includes different types of memory. Complete the description of computer memory. Random Access Memory (RAM) and Read Only Memory (ROM) are both examples of memory. One item that is stored in RAM is . One item that is stored in ROM is . RAM can be either Static RAM (SRAM) or Dynamic RAM (DRAM). SRAM uses transistors arranged as . DRAM uses transistors and . Explain the difference between Programmable ROM (PROM), Erasable Programmable ROM (EPROM) and Electrically Erasable Programmable ROM (EEPROM). A magnetic hard disk is used to store data on the computer. Describe the principal operations of a magnetic hard disk. Computers consist of logic gates. Complete the table by writing one set of values (input 1 and input 2) for each gate that will give the output 1. Gate Input 1 Input 2 Output AND NAND XOR NOR Write the logic expression for the given logic circuit. A B C X
9618_s22_qp_11
THEORY
2022
Paper 1, Variant 1
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A car has several features. One feature is a lane detection system. This system monitors the lines on either side of the lane. If the car gets too close to one line, the system automatically moves the car away from the line. Explain why the lane detection system is an example of an embedded system. Two other features: • record the number of miles travelled in the current journey, from when the engine is turned on to when it is turned off • record the total number of miles the car has travelled since it was built. Identify the data that will be stored in the primary and secondary storage of the car for these two features. Primary Secondary The car has a resistive touchscreen for the user to select options. Tick (3) one box in each row to show whether each statement about a resistive touchscreen is true or false. Statement True False The screen always has five different layers A processor determines the horizontal and vertical coordinates of the point of contact The touchscreen will work if any object touches the screen
9618_s22_qp_12
THEORY
2022
Paper 1, Variant 2
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Questions Discovered
3