Computer Studies Paper 1 Questions and Answers - Sunrise 2 Evaluation Mock Exams 2022

SECTION

QUESTION

A

1-15

B

16

17

18

19

20

TOTAL MARKS

SECTIONA(40 marks)

QNS

RESPONSES

MARKS

1.

Function of:-

(a)Hardware: To perform tasks of inputting, storage, outputting, processing

during data processing and communication.

1

(b)Software:-Instructs the hardware/computer on what to do during data

1

Processing.

-Provides interface between hardware and live ware.

-Accept functions of software based category i.e. system/

application/ working/uses.

1

(c)Live ware: Meant to design or operate a computer.

2.

Problems arising from use of unsuitable computer desk.

• It could lead to back problems if the desk is of an unrealistic height.
• If it does not provide good positioning of the monitor, it could result in eyestrain.
• Wrist problems will arise if the key board and mouse seating positions are bad.
• njury as a result of falling computer components due to weak computer desks/ small size.

(First 2 x 2)

4

3.

Categories of system software

• Firmware;
• Networking software;
• Operating system;
• Utilities.

(First 2 x1) 2

1

4.

Two factors to consider when evaluating warranty

• Period/duration/scope of cover: The warranty should specify the duration of time covered.
• Service agreement/level: The warranty should indicate the type of service to be provided.
• Cost implication/ liability agreement: Cost sharing between the dealer and the buyer in the event of any loss or malfunction.
• Call out response.

(First 2 x 2)

4

5.

Three ways of using computers in electing school captain

• Registering voters/(faster);
• Voter identification(accurate);
• Actual voting;
• Tallying process (speedy).

(Any3 x 1)

3

6.

Figure1:Bring to front or bring to back

Used when the target graphic is hidden by other objects. When clicked, the target graphic is brought to the front. 

Figure2:Textwrap

It is used when a graphic is placed within the text area and the user needs to define how the text flows around the graphic.

1

1

7.

Distinction of GUI and command line operating systems 

(Any2 x 2 )

4

8.

A system flow chart symbols

1. Report or documentation
2. Disk/master file/database

1

1

9.

Ways of adjusting a document to fit a page

• Change page orientation.
• change the font;
• decrease font size;
• reduce margin size;
• reduce character spacing;
• reduce line height.
• change font style eg. bold/italic

(Any3 x 1)

3

10.

Role of network administrator

• to confirm that the network services are running;
• to confirm that the user is granted appropriate privilege to access the Network services/password/authentication;
• to confirm that the network infrastructure is in good condition;
• to confirm that the files sought are inexistence.

(First 3 x 1)

3

11.

Impact of mobile phones

• Users no longer queue in the bank in order to deposit or withdraw money;
• Easy acquisition of financial statements;
• Easy payment of bills;
• Online banking is possible;
• Money transfer is fast.
• Safer transfer of money.
• Provides wide coverage.
• Can offer services anywhere anytime.
• Cheaper money transfer services.
• Increase in fraud.

(First 3 x 1)

3

12.

Items that an email must have: 

• the email address of the recipient;
• the content or message being communicated.

2

13.

Direct input methods

• OBR
• MICR
• OCR;
• OMR;
• Image scanner;
• Magnetic strip technology;
• Image recognition/face recognition/fingerprint.

2

14.

Insecurity arising from hardware failure

• Data loss due to total system failure e.g. HD crash;
• The experts called upon to repair can access critical/ valuable information;
• Data recovery software may be used to make unauthorized backups.

(First 2 x 1)

2

15.

• Nibbles-4
• Bytes -   2

1

1

SECTIONB(60marks)

16.

(a)    Advantages of using low-level language

• program execution is immediate;
• they require no compilation, no interpretation/translation hence they are faster;
• hardware optimization is extensive;
• program developed takes less memory space;
• suitable for micro devices;
• easy to design electronic device.

(First 2 x 1)

(b)  Three tools that can be used to develop an algorithm

• Decision table
• pseudo code;
• natural language;
• top down charts;
• flowcharts.
• DFD/context diagram
• ERD
• decision tree

(First 3 x 1)

2

 3

(a)    Time-sharing mode

This is a processing mode in which a central processor serves two or more users with different requirements. The processor time is divided equally among the tasks in the queue. A user whose task requirements are more than is apportioned is send back to the queue.  For example, four jobs requiring times t1, t2, t3and t4to complete is apportioned equal time in each round until when they are done.  

(b)    Factors to consider when selecting data processing mode 

• The optimization of processing time;
• The time factor required for decision arising from the processed data;
• The ease of development, use and maintenance;
• The control over the resources e.g. files, I/O devices e.t.c;
• The need for the shared resources among several users who may afford purchasing their own facilities as in time sharing configuration;
• The volume of work involved;
• The cost of acquiring the relevant hardware, software, media e.t.c and the cost of maintenance;
• The nature of the task to be processed.

(First 4 x 1)  4

(c)

(i)Purpose of user manual
It is a documentation whose purpose is to help a user to use the system With little guidance.   

(a)(i)Repeater

A device used to re-construct data signal during data transmission to its Original strength/amplify/boost/regenerate. 

(ii)   Router

• It is a device used to facilitate movement of data or packets between two Or more LANS of different configuration (expansion of networks).
• Delivers a packet/data directly to destination computers.
• Interconnects different networks/provides network services.

1

(b)(i)The component P is the terminator.

1

(ii)Terminator in a backboneisusedtopreventdatasignalfrombouncingback/absorbsignals.

2

(c)Use of internet in environmental conservation club

• Source of knowledge on environmental matters;
• Collaboration with peers from other schools or organizations;
• Dissemination of information on what the club is doing;
• Seeking for funding from sponsors.

(First 3 x 1)

3

(d)(i)Benefits of linking branch B and C

• Speed of communication between B and C is increased since the traffic between the two branches can be re-routed through the link BC;
• If either AC or AB is down, the three branches can still communicate;
• If the HQ systems fail, the two branches Band C can communicate using this link.

(First 2 x 2)

4

(ii)Ways to protect company network from hackers

• Changing password frequently
• Use of encryption;
• Use of data proxies;
• Use of firewalls to filter unwanted packets;
• User restriction e.g. passwords/ biometrics.
• Use of complex password.

(Any3 x 1)

3

19.

(a)Formats applied
Bold, strikethrough, underline, italics, centre alignment, dropcap, bulleted list, line height / spacing, 2 column paragraph, column break, casing, font type, left alignment, column separator.

3

(b)Tools for proofreading

• Spellchecker and grammar/ dictionary;
• Auto complete;
• Autocorrect;
• Thesaurus.

(Any3 x 1)

3

(c)(i) =@ or + Count if (B2: B6, “>10,000”)(B2:B6)Argument range- 1(>10,000) Criteria  - 1
AllFormulacorrect-1

(ii)AtD3
Formula is
$ B3 * C$2- 1
= 16000#2
=32, 000- 1

3

2

(d) 

4

20.

(a)Characteristics of octal number system.

• each symbol is represented by 3bits.
• The number is made of8 symbols0, 1, 2,.............. 7;
• Maximum value of a single digit is7 (one less than the value of the base);
• This numbersystemusesbase8.

(Any2 x 1)

2

(ii)14.6875₁₀to binary
14₁₀=  1110₂- 1

0.6875#2=1.375
0.375#2=0.75
0.75#2=1.5
0.5#2=1.0          - 1

Decimal portion=0.1011-1
Numberis1110.10112-1

4

(c)(i) 17₁₀=  10001 or 10001₂-1
10010001- 1
binary equivalent of 17Signbit for negative.

2

(ii) 1710=      10001
In 8 bit       00010001

Reverse bits 1 1 1 0 1 1 1 0-1

+                  1

1 1 1 0 1 1 1 1

Number is 11 1 0 11 1 12-

2

(d)

110.11₂+11.011₂
1 1 0.1 1 0
+0 1 1.0 1 1- 1
 1 0 1 0 . 0 0 1- 1

2