1(c)
– Row 1: A=1, B=0, C=1, D=1
A·B = 0, Ā·B̄ = 1, C+D = 1, Z = 1
– Row 2: A=1, B=1, C=1, D=0
A·B = 1, Ā·B̄ = 0, C+D = 1, Z = 0
– Row 3: A=1, B=0, C=0, D=1
A·B = 0, Ā·B̄ = 1, C+D = 1, Z = 1
– Row 4: A=1, B=1, C=0, D=0
A·B = 1, Ā·B̄ = 0, C+D = 0, Z = 0
– Row 5: A=1, B=0, C=1, D=1
A·B = 0, Ā·B̄ = 1, C+D = 1, Z = 1
2(a) The internet is a global network of interconnected computers and devices that communicate using standardised protocols to share information and resources worldwide.
2(b)
(i) Intranet is private and accessible only to members of a specific organisation — Extranet extends access to selected outside users such as partners or suppliers.
(ii) Intranet is confined within one organisation — Extranet connects two or more organisations.
2(c)
(i) HTTP — HyperText Transfer Protocol
(ii) IP — Internet Protocol
(iii) LAN — Local Area Network
(iv) TCP — Transmission Control Protocol
(3a)
A register is a small, high-speed storage location inside the CPU used to hold data temporarily during processing.
(b)
(i) Special purpose register:
Example: Program Counter (PC) or Instruction Register (IR)
(ii) General purpose register:
Example: Accumulator (AC) or Register R1, R2, etc.
(c)
Special Purpose Register
Used for a specific CPU function (e.g., PC, IR).
General Purpose Register is
Used for general data storage and operations
NUMBER 4
(4a)
(i) Rectangle: Process
(ii) Parallelogram: Input/Output
(iii) Diamond: Decision
(iv) Arrows: Flowlines (Direction of flow)
(v) Oval/Ovals: Terminator (Start/End)
(4b)
(i)Process (Rectangle): Used to represent a set of operations that change value, form, or location of data, such as a calculation (e.g., \(x = a + b\)).
(ii)Input/Output (Parallelogram): Represents the act of entering data into the system or displaying results to the user (e.g., “Read A” or “Print Total”).
(iii)Decision (Diamond): Used to show a conditional step where a question is asked (usually Yes/No or True/False), determining which path the flow will take.
(iv)Flowlines (Arrows): Used to connect the symbols and indicate the exact sequence and direction in which the steps are performed.
(v)Terminator (Oval): Marks the starting point and the ending point of the entire flowchart process.
(5a)
An integrated software package is a collection of related application programs bundled together as a single unit. These programs (such as a word processor, spreadsheet, and database) share a common user interface and allow for the easy transfer of data between them.
(5b)
(i)EXT (Extend Selection Mode): When this mode is active, you can use the arrow keys to extend the current selection of cells. Instead of moving the cursor to a new cell, the program “stretches” the highlighted area from the original cell to the new one.
(ii)OVR (Overtype Mode): In this mode, any new character you type replaces (overwrites) the existing character at the cursor position. This is the opposite of the standard Insert mode, where new text is pushed in between existing characters.
(5c)
(i)Insert Mode: The default mode where new text is inserted at the cursor, pushing existing text to the right.
(ii)Overtype (or Overwrite) Mode: A mode where new text replaces the existing text character-by-character as you type.
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