2024 NABTEB COMPUTER: 2023 NABTEB COMPUTER CRAFT ANSWERs (3757)

Computer OBJ

1-10: ACCCCBCCCA
11-20: DCDCDCCBBC
21-30: DCBCCDABCB
31-40: DDCCACDDCC

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(1a)
A computer is a digital electronic machine that can be programmed to carry out sequences of arithmetic or logical operations

(1b)
(i) Timelines:
A good piece of information is one that can easily be accessed as an , when required
(ii) Meaningfulness:
each message must be capable of being easily interpreted by the reader
(iii) Currency:
The message will be piece of information conveys must not be stable
(iv) Accuracy:
The idea or message must be factual and correct
(v) Usability:
The information must be useful for the purpose for which it is required

(1c)
(i) Hardware
(ii) Software

-EXPLANATION-
(i) HARDWARE
Hardware is any part of the computer that we can touch these parts. These are the primary electronic devices used to build up the computer. Examples of hardware in a computer are the Processor, Memory Devices, Monitor, Printer, Keyboard, Mouse, and the Central Processing Unit.

(ii) SOFTWARE
Software is a set of instructions, data or programs used to operate computers and execute specific tasks or Software is a set of instructions, data or programs used to operate computers and execute specific tasks. example of software is Excel or Windows or iTunes.
============================

(3a)
A monitor is an electronic visual computer display that includes a screen, circuitry and the case in which that circuitry is enclosed

(3b)
(i) LCD (Liquid Crystal Display)
(ii) LED (Light Emitting Diodes)
(iii) CRT (Cathode Ray Tube)

(3c)

============================

(4i)
File Organization refers to the logical relationships among various records that constitute the file, particularly with respect to the means of identification and access to any specific record.

(4aii)
logical file organization is the level of the file system at which users can request file operations by system call.

(4aiii)
Physical files organization contain the actual data that is stored on the system, and a description of how data is to be presented to or received from a program.

(4b)
ADVANTAGES-
(i) It has better control over record allocation.
(ii) It updates several files quickly.
(iii) It accesses the desired records immediately.

- DISADVANTAGES -
(i) Direct file organization does not provide back up facility.
(ii) It is expensive.
(iii) It has less storage space as compared to sequential file.
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(5a)
digital computer this is defined as any of a class of devices capable of solving problems by processing information in discrete form, examples are laptops, smartphones, and calculators.

(5b)

(5c)
In a Tabular Form

-NAND-
[Pick any Four]
(i) NAND gate is formed by the combination of NOT gate and AND gate.
(ii) The output of NAND gate is the compliment of the product of the input.
(iii) NAND gate is bubbled NOT gate.
(iv) In NAND gate if any input is low the output is high.
(v) In NAND gate If all inputs are high then input is low.

-NOR-
[Pick any four]
(i) NOR gate is the combination of NOT and OR gate.
(ii) The output of NOR gate is the compliment of the sum of the input.
(iii) NOR gate is bubbled OR gate.
(iv) In NOR gate when both the inputs are low then output is high.
(V) In NOR gate if any input is high the output is low.
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(7a)
computer program is a sequence of instructions in a programming language that a computer can execute or interpret

(7b)
[PICK ANY FOUR]
(i) Flexibility.
(ii) User Friendly.
(iii) Portability.
(iv) Reliability.
(v) Self-Documenting Code.
(vi) Machine Independent.
(vii) Cost Effectiveness.
(viii) Related Articles.

(7c)
(i) Step 1: Identify the problem.
(ii) Step 2: Find a solution.
(iii) Step 3: Code it.
(iv) Step 4: Test it.

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