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Objective & Essay – Computer Studies – 10:00am–1:00pm

COMPUTER OBJ:
1-10: EEBDCEDEBD
11-20: CADAEDDBAA
21-30: BAADCADCEC
31-40: AABAABBCDB
41-50: ABCDEABEAD
51-60:CADADACDEE

(1ai)
The control unit is a component of a computer’s central processing unit that directs the operation of the processor

(1aii)
An arithmetic logic unit is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers.

(1aiii)
Registers are type of computer memory used to quickly accept, store, and transfer data and instructions that are being used immediately by the CPU.

(1bi)
Phishing is a type of social engineering attack often used to steal user data, including login credentials and credit card numbers.

(1bii)
(i) Network Congestion.
(ii) Infrastructure Parameters (QoS, Filtering, Routing)

(1biii)
(i) AVG Antivirus
(ii) Norton Antivirus.
(iii) Ad-Aware

(2ai)
A compiler is a computer program that translates computer code written in one programming language into another language. The name “compiler” is primarily used for programs that translate source code from a high-level programming language to a lower level language to create an executable program.

(2aii)

(2bi)
– F5: In all modern Internet browsers, pressing F5 will refresh or reload the page or document window.

(2bii)
– F1: Almost always used as the help key, almost every program opens a help screen when this key is pressed.

(2c)
A character set defines the valid characters that can be used in source programs or interpreted when a program is running.

(3ai)

(3aii)

(3aiii)

(3bi)
(i)
.com; they are use initially intended to distinguish commercial organizations

(ii)
.net ; they are use connect Nordic national research and educational networks

(iii)
.org ; they are use for both nonprofit and for-profit organizations.

(3bii)
(i)Google Chrome.
(ii)Mozilla Firefox

(4ai)
Network Topology is the schematic description of a network arrangement, connecting various nodes(sender and receiver) through lines of connection.

(4aii)
(i)Transmitting network is not affected by high traffic or by adding more nodes, as only the nodes having tokens can transmit data.
(ii)Cheap to install and expand

(4bi)

(4bii)
An algorithm is a finite sequence of well-defined, computer-implementable instructions, typically to solve a class of specific problems or to perform a computation.

(4biii)
-Word processor-
(i)Abiword
(ii)Corel WordPerfect

-Spreadsheet packages-
(i)Google Sheets
(ii)Microsoft Excel

(5ai)
File security is a feature of your file system which controls which users can access which files, and places limitations on what users can do to various files in your computer.

(5aii)
-FILES-
(i) Computer files are transferred electronically.
(ii) Computer files are difficult to destroy and can last for a long time.
(iii) Computer files is difficult to access at all times

-MANUAL FILES-
(i) Manual files can be transported through physical means
(ii) Manual files can warn off and can be depleted easily by hand.
(iii) Manual files is Easy to access whenever required

(5aiii)
A programming language is a formal language comprising a set of strings that produce various kinds of machine code output.

(5bi)

(5bii)
-(Pick any two)-
(i) Keyboard
(ii) Mouse
(iii) Scanner
(iv) Cameras
(v) Joystick

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NECO Computer Studies 2021 answers

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