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Neco Computer Studies Question and Answer 2021

Neco Computer Studies Question and Answer 2021

 
 
NECO COMPUTER STUDIES ANSWERS
==============================
 
NECO COMPUTER STUDIES OBJ
01-10: EEBDCEDEBD
11-20: CADAEDDBAA
21-30: BAADCADCEC
31-40: AABAABBCDB
41-50: DDCDBCAECD
51-60: CBAADACDAD
==============================
 
NECO COMPUTER STUDIES ESSAY
==============================
Instruction; Answer Four Questions Only
==============================
 
(1ai)
The control unit is a component of a computer’s central processing unit that directs the operation of the processor.
CU typically uses a binary decoder to convert coded instructions into timing and control signals that direct the operation of the other units. Most computer resources are managed by the CU.
 
(1aii)
An arithmetic logic unit is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers. This is in contrast to a floating-point unit, which operates on floating point numbers.
 
(1aiii)
Register is defined as the small subset of the data that has fast accessible memory in the central processing unit. For the execution of different computer instructions and programs type of registers are used. There are numerous categories of computer registers that are available for the execution of instructions. The registers can be categorized by their size, functions, or names. These registers are used to store the data temporarily and perform the execution of computer instructions and can be also used to store results in it. The processing speed of registers is the fastest to another data set.
 
(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)
1. int main() {
2. float radius, area;
3. printf(“\nEnter the radius of Circle: “);
4. scanf(“%d”, &radius);
5. area = 3.14 * radius * radius
6. printf(“\nArea of Circle: %f”, area);
7. return (0);
 
(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.
===================================
 
(4ai)
Network topology is the arrangement of the elements of a communication network
 
(4aii)
(i) All data flows in one direction, reducing the chance of packet collisions.
(ii) A network server is not needed to control network connectivity between each workstation.
(iii) Data can transfer between workstations at high speeds.
 
(4bi)
-WORM-
(i) Worm Requires a host
(ii) Worm Triggered by human interaction
(iii) Worm Often arrives through an infected file
 
-VIRUS-
(i) Virus Spreads independently
(ii) Virus doesn’t require human interaction
(iii) Often arrives through a software vulnerability
 
(4bii)
An algorithm is a set of step-by-step procedures, or a set of rules to follow, for completing a specific task or solving a particular problem
 
(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 are 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 are 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)
Check the diagram
 
(5bii)
-(Pick any two)-
(i) Keyboard
(ii) Mouse
(iii) Scanner
(iv) Cameras
(v) Joystick
===================================
 
Completed.
 
The national examination council has scheduled the computer studies to kick of by 14th of August 2021.
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Neco computer studies question 2021

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Neco computer studies answer 2021

 

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