IGCSE Computer Science Paper 1 Crossword: 4.1 Types of Software and Interrupts (Modules 390–408)
Name:
Date:
Class:
✎
Crossword
Read each clue and write the matching term in the grid. Numbers in brackets show the letters in each word.
1
2
3
4
5
6
7
8
9
10
Across
- 6. Word 1 of the term in 3 Down: ____ ________ (4)
- 8. An ______ cannot run on its own: it needs the OS to manage resources, the firmware to start the OS and the hardware to carry out its instructions. Word 1 of: ___________ __________ (11)
- 9. Word 2 of the term in 8 Across: ___________ __________ (10)
- 10. A signal sent to the CPU telling it to pause its current task so something more urgent can be dealt with. The CPU then returns to the original task. It is not a crash. (9)
Down
- 1. A signal sent by a ______ device, such as a keyboard, mouse or printer, to tell the CPU it needs attention, for example a key press or a printer out of paper. Word 1 of: ________ _________ (8)
- 2. A small program stored in firmware that runs first at power-on, finds the operating system on storage, copies it into RAM and hands control to it. (10)
- 3. Power on, the bootloader in firmware runs and loads the OS from storage into RAM (which is empty at power-on). Once the OS is ready, the user can open applications. Word 2 of: ____ ________ (8)
- 4. Permanent software stored in a chip on the hardware. It gives the hardware its basic instructions and is kept when the power is off. Found in routers and PCs. (8)
- 5. The layers of a computer: applications run on the operating system, which runs on firmware, which runs on hardware. Each layer depends on the layer below it. Word 1 of: ________ _____ (8)
- 7. Word 2 of the term in 5 Down: ________ _____ (5)
Answer Key
IGCSE Computer Science Paper 1 · Modules 390–408
1H
2B
3S
4F
A
O
E
I
R
5S
O
Q
R
D
6B
O
O
T
U
M
W
F
L
E
W
7S
8A
P
P
L
I
C
A
T
I
O
N
N
A
T
R
W
A
C
R
A
E
A
9D
E
P
E
N
D
E
N
C
Y
R
E
K
10I
N
T
E
R
R
U
P
T
Across
6BOOT — Word 1 of the term in 3 Down: ____ ________
8APPLICATION — An ______ cannot run on its own: it needs the OS to manage resources, the firmware to start the OS and the hardware to carry out its instructions. Word 1 of: ___________ __________
9DEPENDENCY — Word 2 of the term in 8 Across: ___________ __________
10INTERRUPT — A signal sent to the CPU telling it to pause its current task so something more urgent can be dealt with. The CPU then returns to the original task. It is not a crash.
Down
1HARDWARE — A signal sent by a ______ device, such as a keyboard, mouse or printer, to tell the CPU it needs attention, for example a key press or a printer out of paper. Word 1 of: ________ _________
2BOOTLOADER — A small program stored in firmware that runs first at power-on, finds the operating system on storage, copies it into RAM and hands control to it.
3SEQUENCE — Power on, the bootloader in firmware runs and loads the OS from storage into RAM (which is empty at power-on). Once the OS is ready, the user can open applications. Word 2 of: ____ ________
4FIRMWARE — Permanent software stored in a chip on the hardware. It gives the hardware its basic instructions and is kept when the power is off. Found in routers and PCs.
5SOFTWARE — The layers of a computer: applications run on the operating system, which runs on firmware, which runs on hardware. Each layer depends on the layer below it. Word 1 of: ________ _____
7STACK — Word 2 of the term in 5 Down: ________ _____