Counting On It
Its all Logical
Peripheral Contexts
Memories
C.P.U.
100
Counting from 1 to 20 in hexadecimal
1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10, 11, ..., 1F, 20
100
State the truth table for the OR gate
A B Q 0 0 0 0 1 1 1 0 1 1 1 1
100
Give one peripheral that is used for both input and output with a computer.
Answers may vary, but touch screen and external hard drive count.
100
What is the purpose of the ALU?
Evaluates Arithmetic and Logical Operations
200
Convert 1101 0000 (binary) to base 10
208 (base 10)
200
What is the truth table for (A xor B) AND C?
A B C Result 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 1 1 0 0 0 1 0 1 1 1 1 0 0 1 1 1 0
200
What happens when a file is deleted from a computer?
Its reference only is removed. The file is still present on the hard disk.
200
State the three fastest forms of memory, in order of fastest to slowest.
(Register) Cache, RAM, Hard Disk
200
What is the role of the Instruction Address Register?
Keeps track of the place in memory for the currently executing instruction.
300
What is 1001 0110 1111 1010 in hexadecimal?
96FA
300
State the gate: A B Result F F T F T F T F F T T F
NAND gate
300
Name three or more main things that describe the main role of the Operation System.
- Protection - Memory Management - User Interface - Device Configuration - File Management
300
What is EEPROM?
Electrically Eraseable Programmable Read Only Memory
300
How do you compare to CPUs? Give at least 3.
Clock Speed, Age/Technologies, Cores, Cache
400
What is -20 in two's compliment?
1110 1100
400
How many rows would a truth table have with 5 inputs (A, B, C, D and E)
32 rows
400
What does BIOS stand for and what is its role in a computer?
Basic Input/Output System It starts up the OS and manages the hardware on the motherboard for the OS.
400
State three forms of non-volatile memory.
SSD, HD, Magnetic Disk, (EE)(P)ROM, Flash
400
Compare parallel processing and pipelining.
Parallel is two programs running at once. Pipelining is running one program more efficiently.
500
Octal means base-8. What is the sum of 754 + 164?
1140
500
Without using an XOR gate, design a set of logic gates that will generate the same truth table.
Answers will vary.
500
Describe how virtual memory works.
All programs stored in memory think they start at address 0. OS calculates the actual start address for execution.
500
How does data move around the computer?
The BUS
500
Describe the role of the CU fully.
It Fetches, Decodes and Executes instructions. Manages the function of overall CPU.
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