IGCSE Computer Science Paper 1 Crossword: 3.1 Computer Architecture and 3.2 Input and Output Devices (Modules 240–251)
Name:
Date:
Class:
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Crossword
Read each clue and write the matching term in the grid. Numbers in brackets show the letters in each word.
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3
4
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7
8
9
10
Across
- 3. A ______, such as a PC or laptop, that can do many different jobs by running different programs, and the user can install new software. Word 1 of: _______-purpose ________ (7)
- 6. Input device: a lens focuses light onto an image sensor of light-sensitive cells; each cell becomes a pixel of digital data, stored as an image file. More pixels give more detail. Word 2 of: digital ______ (6)
- 7. A computer system built into a larger device to perform one dedicated function, usually running a fixed program. Examples: a washing machine controller or a microwave timer. Word 1 of: ________ system (8)
- 9. Word 2 of the term in 5 Down: _______ ____ (4)
- 10. Word 3 of the term in 3 Across: _______-purpose ________ (8)
Down
- 1. An input device where pressing a key completes a circuit. The controller identifies the key and sends its character code to the computer, so text and commands can be entered. (8)
- 2. A full-mark CPU answer uses exact names for registers, buses and units, and gives the fetch, ______ and ______ steps in order, e.g. PC to MAR, then MDR, then CIR. Word 2 of: fetch-______-_______ (6)
- 4. An input device with an LED or laser under it that lights the surface while a sensor takes rapid images to track movement and move the pointer. It has no ball. Word 2 of: optical _____ (5)
- 5. The binary (0s and 1s) form of instructions that the CPU can run directly. Each instruction has an opcode and an operand. Programs must be translated into it to run. Word 1 of: _______ ____ (7)
- 8. Word 3 of the term in 2 Down: fetch-______-_______ (7)
Answer Key
IGCSE Computer Science Paper 1 · Modules 240–251
1K
2D
3G
E
N
E
R
A
L
Y
C
4M
B
O
O
O
D
5M
U
6C
A
M
E
R
A
S
R
C
7E
M
B
8E
D
D
E
D
H
X
I
9C
O
D
E
N
10C
O
M
P
U
T
E
R
U
T
E
Across
3GENERAL — A ______, such as a PC or laptop, that can do many different jobs by running different programs, and the user can install new software. Word 1 of: _______-purpose ________
6CAMERA — Input device: a lens focuses light onto an image sensor of light-sensitive cells; each cell becomes a pixel of digital data, stored as an image file. More pixels give more detail. Word 2 of: digital ______
7EMBEDDED — A computer system built into a larger device to perform one dedicated function, usually running a fixed program. Examples: a washing machine controller or a microwave timer. Word 1 of: ________ system
9CODE — Word 2 of the term in 5 Down: _______ ____
10COMPUTER — Word 3 of the term in 3 Across: _______-purpose ________
Down
1KEYBOARD — An input device where pressing a key completes a circuit. The controller identifies the key and sends its character code to the computer, so text and commands can be entered.
2DECODE — A full-mark CPU answer uses exact names for registers, buses and units, and gives the fetch, ______ and ______ steps in order, e.g. PC to MAR, then MDR, then CIR. Word 2 of: fetch-______-_______
4MOUSE — An input device with an LED or laser under it that lights the surface while a sensor takes rapid images to track movement and move the pointer. It has no ball. Word 2 of: optical _____
5MACHINE — The binary (0s and 1s) form of instructions that the CPU can run directly. Each instruction has an opcode and an operand. Programs must be translated into it to run. Word 1 of: _______ ____
8EXECUTE — Word 3 of the term in 2 Down: fetch-______-_______