Question $1$

NB: For drawing data flow diagrams $($DFDs$),$ use the Gane and Sarson symbols$/$notation$.$

One of the leading models a systems analyst may use is a Data Flow Diagram $($DFD$).$ It

is a crucial tool that is used during the Systems Analysis phase of an SDLC$.$ It offers a

clear and structured way to represent and analyse the flow of data within a system.

Basically, a DFD is a graphical representation of the flow of data within a system. It uses

various symbols to show how the system transforms input data into useful information.

Several symbols are used to draw a dataflow diagram. In addition, some terminologies

are used when using a data flow diagram.

$1\mathrm{.}1$ Draw a table as given, and $($i$)$ draw a symbol $($Only$)$ of each component of a DFD$,($ii$)$

define the symbol, and $($ii$)$ give an example of the real$-$world name you can put into the

middle of that symbol. Each row should be enlarged, as in $($a$),$ so that you can draw and

fit the symbol. You can use MS Word, PowerPoint or any other software to draw the $1\mathrm{.}2$ Draw a table, as given below, of potential incorrect DFDs$,$ showing the possible input, process and output names for each row. Do not give names to any part of the Diagram $($only$)$ column in the table. You should name a process, inpQuestion $1$

NB: For drawing data flow diagrams $($DFDs$),$ use the Gane and Sarson symbols$/$notation$.$

One of the leading models a systems analyst may use is a Data Flow Diagram $($DFD$).$ It

is a crucial tool that is used during the Systems Analysis phase of an SDLC$.$ It offers a

clear and structured way to represent and analyse the flow of data within a system.

Basically, a DFD is a graphical representation of the flow of data within a system. It uses

various symbols to show how the system transforms input data into useful information.

Several symbols are used to draw a dataflow diagram. In addition, some terminologies

are used when using a data flow diagram.

$1\mathrm{.}1$ Draw a table as given, and $($i$)$ draw a symbol $($Only$)$ of each component of a DFD$,($ii$)$

define the symbol, and $($ii$)$ give an example of the real$-$world name you can put into the

middle of that symbol. Each row should be enlarged, as in $($a$),$ so that you can draw and

fit the symbol. You can use MS Word, PowerPoint or any other software to draw the$1\mathrm{.}2$ Draw a table, as given below, of potential incorrect DFDs$,$ showing the possible input,If you cannot fit the diagram in the space you have made, you may put each of them below

the table but number them correctly, i$.$e$.,$ a$,$ b and c

ICT$2621/3/102/2024$

symbol. Note that this work must be typed, not handwritten. NB: The table must be similar but not the same size as the one given below.

$\backslash$table$[[$#$,$Name,SYMBOL,DEFINITION,Example$],[$a$,$Process,,,$],[$b$,\backslash$table$[[$Data$],[$store$]],,,],[$c$,\backslash$table$[[$External$],[$entity$]],,,],[$Data flow,,,,$]]$

If you cannot fit the diagram in the space you have made in the table, you may put each of them below the table but number them correctly, i$.$e$.,$ a$,$ b$,$ c and $d.$Question $2$

Question $3$

$[20]$

The goal of system design is to build systems that are effective, reliable, maintainable and

provide a positive user experience. Even though there are numerous sets of principles that

If you cannot fit the diagram in the space you have made, you may put each of them below

the table but number them correctly, i$.$e$.,a,b$ and $c$ Question $2$

$2\mathrm{.}1$ Briefly describe the following with respect to DFDs:

$2\mathrm{.}1\mathrm{.}1$ Structured English

$2\mathrm{.}1\mathrm{.}2$ Decision table

$2\mathrm{.}1\mathrm{.}3$ Balancing

$2\mathrm{.}1\mathrm{.}4$ Diverging data flows

$2\mathrm{.}1\mathrm{.}5$ Data dictionary

$2\mathrm{.}1\mathrm{.}6$ LevellingICT$2621/3/102/2024$

symbol. Note that this work must be typed, not handwritten. NB: The table must be similar but not the same size as the one given below.

$\backslash$table$[[$#$,$Name,SYMBOL,DEFINITION,Example$],[$a$,$Process,,,$],[$b$,\backslash$table$[[$Data$],[$store$]],,,],[$c External,,,,$],[$entity$,,,,]]$

If you cannot fit the diagram in the space you have made in the table, you may put each of them below the table but number them correctly, i$.$e$.,$ a$,$ b$,$ c and d$.$

$(12)$