← Assistant & UDC
Past Questions — 2025
In MS Word, the shortcut key Ctrl + H is used for:
A)
Copy
B)
Find
C)
Replace
D)
Highlight
In Microsoft Word, the shortcut key Ctrl + H is specifically designed to open the 'Find and Replace' dialog box, focusing on the 'Replace' tab. This allows users to search for a specific word or phrase and replace it with another throughout the document.
Analysis of other options:
- Option (a) Copy: The shortcut key for Copy is Ctrl + C.
- Option (b) Find: The shortcut key for Find is Ctrl + F.
- Option (d) Highlight: There is no standard single-combination Ctrl shortcut for highlighting text; this is typically done via the Ribbon menu or specific formatting shortcuts.
Which of the following is the fastest memory unit in a computer system?
A)
Registers
B)
SSD
C)
Cache
D)
RAM
In a computer system, memory is organized in a hierarchy based on speed, cost, and capacity.
1. **Registers (Option a):** These are small storage locations located directly inside the CPU (Central Processing Unit). Because they are integrated into the processor's logic, they operate at the same speed as the CPU, making them the fastest memory unit in the system.
2. **Cache (Option c):** Cache memory (L1, L2, L3) is also very fast and located close to the CPU, but it is slower than registers because it is a larger pool of memory that the CPU must access via a bus.
3. **RAM (Option d):** Random Access Memory is the main system memory. It is significantly slower than both registers and cache because it is located further from the CPU on the motherboard.
4. **SSD (Option b):** A Solid State Drive is a form of secondary storage. While much faster than traditional Hard Disk Drives (HDDs), it is orders of magnitude slower than RAM, cache, or registers because it stores data non-volatily on flash chips.
Therefore, the order of speed from fastest to slowest is: Registers > Cache > RAM > SSD.
Which among the following is true about Primary vs Secondary memory?
A)
Primary memory is non-volatile, Secondary memory is volatile
B)
Primary memory is faster but temporary, Secondary memory is slower but permanent
C)
Both are volatile in nature
D)
Secondary memory directly communicates with CPU
To determine the correct statement, we must analyze the characteristics of Primary and Secondary memory:
1. **Primary Memory (e.g., RAM):** It is the main memory of the computer. It is directly accessible by the CPU, making it extremely fast. However, it is 'volatile,' meaning it loses its data when the power is turned off (temporary).
2. **Secondary Memory (e.g., HDD, SSD):** It is used for long-term storage. It is 'non-volatile,' meaning it retains data even without power (permanent). Because it is not directly connected to the CPU's internal bus in the same way as RAM, it is significantly slower.
Evaluating the options:
- **Option a:** Incorrect. It swaps the definitions; Primary is volatile and Secondary is non-volatile.
- **Option b:** Correct. Primary memory is faster (low latency) but temporary (volatile), while Secondary memory is slower but permanent (non-volatile).
- **Option c:** Incorrect. Only Primary memory (specifically RAM) is volatile; Secondary memory is non-volatile.
- **Option d:** Incorrect. The CPU communicates directly with Primary memory (RAM) and Cache. Data from Secondary memory must first be loaded into Primary memory before the CPU can process it.
When inserting a chart linked to Excel, which paste option allows future updates?
A)
Paste as Picture
B)
Embed Object
C)
Paste Link
D)
Paste Values
When integrating data between Microsoft Excel and other MS Office applications (like Word or PowerPoint), the 'Paste Link' option creates a dynamic connection between the source file (Excel) and the destination document. If the data in the original Excel spreadsheet is changed, the linked chart in the destination document will automatically update to reflect those changes.
Here is why the other options are incorrect:
- a. Paste as Picture: This converts the chart into a static image. It cannot be edited or updated if the source data changes.
- b. Embed Object: Embedding places a copy of the data into the destination file. While you can double-click it to edit the data using Excel tools, it does not maintain a live link to the original external Excel file; changes to the original file will not reflect in the embedded object.
- d. Paste Values: This option pastes only the raw data (text/numbers) without any formatting or chart structure, and it is static (no link to the source).
Which spreadsheet feature is MOST useful in analyzing large data sets with summarized views, filtering, and grouping?
A)
PivotTable
B)
VLOOKUP
C)
Data Validation
D)
Goal Seek
Step-by-step reasoning: 1. The question asks for a feature used for 'analyzing large data sets', 'summarized views', 'filtering', and 'grouping'. 2. A PivotTable is specifically designed to summarize large amounts of data instantly. It allows users to drag and drop fields to group data, apply filters (Slicers), and calculate sums, averages, or counts without writing complex formulas. 3. Evaluating other options: (b) VLOOKUP is a lookup function used to find specific values in a table, not for summarizing or grouping large sets. (c) Data Validation is used to restrict the type of data entered into a cell (e.g., dropdown lists), which is a data entry control, not an analysis tool. (d) Goal Seek is a 'What-If Analysis' tool used to find the input value needed to achieve a specific result, which is not used for summarizing large datasets. Therefore, PivotTable is the most accurate answer.
Computer processing speed is usually expressed in?
A)
Bits per second (bps)
B)
Dots Per Inch (DPI)
C)
Gigahertz (GHz)
D)
Megabytes per sec (MB/s)
Computer processing speed refers to the clock speed of the Central Processing Unit (CPU), which is the number of cycles a CPU can execute per second. This is measured in Hertz (Hz). Modern processors operate at billions of cycles per second, which is expressed as Gigahertz (GHz).
Analysis of other options:
- a. Bits per second (bps): This is a measure of data transfer rate or network bandwidth, not processing speed.
- b. Dots Per Inch (DPI): This is a measure of spatial printing or image scanner resolution.
- d. Megabytes per sec (MB/s): This is a measure of data throughput or storage read/write speed (e.g., for an SSD or HDD), not the internal processing speed of the CPU.
In Excel, which formula correctly adds the value in cell A1 from Sheet2 to the value in cell B1 of the current sheet?
A)
=B1+Sheet2!A1
B)
=B1+A1(Sheet2)
C)
=B1&Sheet2!A1
D)
=SUM(B1,Sheet2A1)
In Microsoft Excel, referencing a cell from a different worksheet requires a specific syntax: 'SheetName!CellAddress'.
1. **Analysis of Option (a):** `=B1+Sheet2!A1`. This follows the correct syntax. 'B1' refers to the cell in the current sheet, '+' is the addition operator, and 'Sheet2!A1' correctly points to cell A1 on the worksheet named Sheet2. This is the correct formula.
2. **Analysis of Option (b):** `=B1+A1(Sheet2)`. This is syntactically incorrect. Excel does not use parentheses to denote the sheet name; it uses the exclamation mark (!).
3. **Analysis of Option (c):** `=B1&Sheet2!A1`. The ampersand (&) is the concatenation operator in Excel. Instead of adding the numerical values, this would join the two values together as a text string (e.g., if B1 is 10 and Sheet2!A1 is 5, the result would be '105' instead of 15).
4. **Analysis of Option (d):** `=SUM(B1,Sheet2A1)`. This is incorrect because it misses the exclamation mark (!) between the sheet name and the cell reference. It should have been `=SUM(B1, Sheet2!A1)` to be valid.
In Windows OS, the Recycle Bin does not store files deleted from:
A)
Desktop
B)
Internal hard disk
C)
Documents folder
D)
Removable drives (USB)
In the Windows Operating System, the Recycle Bin acts as a temporary storage area for files deleted from the local internal storage.
1. **Internal Storage (Options a, b, and c):** Files deleted from the Desktop, Internal Hard Disk, or the Documents folder are moved to the Recycle Bin. This allows the user to 'Restore' the files if they were deleted by mistake.
2. **Removable Storage (Option d):** When a file is deleted from a removable drive, such as a USB flash drive, SD card, or external portable drive, Windows performs a 'permanent delete.' These files bypass the Recycle Bin entirely and are removed from the file system index immediately. This is because removable drives are designed to be portable and may not have a designated hidden system folder (like $Recycle.Bin) configured to manage deleted items across different computers.
Therefore, files deleted from removable drives are not stored in the Recycle Bin.
In MS Excel, the function =IF(AND(A1>50,B1<100), “Pass”,”Fail”) will return “Pass” only if:
A)
A1 is less than 50 and B1 is greater than 100
B)
A1 is greater than 50 and B1 is less than 100
C)
A1 and B1 are both equal to 100
D)
None of the above
The given formula is =IF(AND(A1>50,B1<100), “Pass”,”Fail”).
1. The AND function is a logical operator that returns TRUE only if all its arguments are true. In this case, the two conditions are (A1 > 50) and (B1 < 100).
2. The IF function follows the syntax: =IF(logical_test, value_if_true, value_if_false).
3. Therefore, the formula will return 'Pass' (the value_if_true) only if the AND condition is satisfied. This means A1 must be strictly greater than 50 AND B1 must be strictly less than 100.
Evaluating the options:
- Option (a) is the opposite of the required conditions.
- Option (b) matches the logical requirements of the AND function exactly.
- Option (c) is incorrect because if A1=100 and B1=100, the second condition (B1 < 100) becomes false, resulting in 'Fail'.
Which of the following best describes the difference between relative, absolute, and mixed references in Excel?
A)
Relative references remain fixed, absolute change with copying
B)
Absolute references change with copying, relative stay constant
C)
Relative adjust automatically, absolute remain fixed, mixed lock either row or column
D)
Mixed and relative are identical
In Microsoft Excel, cell referencing determines how a cell address behaves when a formula is copied or dragged to another cell:
1. **Relative References**: These are the default references (e.g., A1). When you copy a formula containing a relative reference, Excel adjusts the reference based on the relative position of rows and columns. For example, if you copy '=A1' one cell down, it becomes '=A2'.
2. **Absolute References**: These are locked references denoted by dollar signs (e.g., $A$1). The dollar sign before the column letter and the row number ensures that the reference remains fixed to that specific cell, regardless of where the formula is copied.
3. **Mixed References**: These lock only one part of the reference—either the row or the column (e.g., $A1 or A$1). In $A1, the column is fixed but the row changes; in A$1, the row is fixed but the column changes.
Evaluating the options:
- Option (a) is incorrect because it swaps the definitions of relative and absolute.
- Option (b) is incorrect because it also swaps the definitions.
- Option (c) is correct as it accurately describes all three types of references.
- Option (d) is incorrect because mixed and relative references behave differently.
Which advanced MS Word feature allows automatic generation of citations and bibliography in different styles (APA, MLA, Chicago)?
A)
Track Changes
B)
Reference Manager
C)
Insert Footnote
D)
Table of Authorities
The correct answer is 'Reference Manager' (found under the 'References' tab in MS Word). This feature allows users to input source details (author, title, year, etc.) and automatically generate in-text citations and a full bibliography/works cited list. It supports various academic styles such as APA, MLA, and Chicago, and allows the user to switch between these styles globally with a single click.
Why other options are incorrect:
- a. Track Changes: This is a review tool used to record edits made to a document; it has nothing to do with citations.
- c. Insert Footnote: While footnotes can be used for citations, they are manual entries at the bottom of the page and do not automatically generate a formatted bibliography in specific styles like APA or MLA.
- d. Table of Authorities: This is a specialized feature used primarily in legal documents to list cases, statutes, and rules cited in the text, rather than general academic bibliography management.
In Excel, which feature lets you restrict editing in specific cells while allowing changes in others?
A)
Freeze Sheet
B)
Protect Sheet
C)
Data Validation
D)
Lock Panes
In Microsoft Excel, the 'Protect Sheet' feature is used to prevent unauthorized changes to the contents of a worksheet. By default, all cells in an Excel sheet are marked as 'Locked'. However, this locking mechanism only takes effect once the 'Protect Sheet' command is activated. To allow changes in specific cells while restricting others, a user must first select the cells they want to remain editable, go to Format Cells > Protection, and uncheck the 'Locked' box. Once the sheet is protected via the Review tab, only those unlocked cells can be edited, while all other cells remain restricted.
Why other options are incorrect:
- a. Freeze Sheet: This is not a standard Excel term; 'Freeze Panes' exists, but it relates to visibility, not editing restrictions.
- c. Data Validation: This feature restricts the *type* of data or values that can be entered into a cell (e.g., only numbers between 1 and 10), but it does not lock the cell from being edited entirely.
- d. Lock Panes: This is a misnomer for 'Freeze Panes', which keeps specific rows or columns visible while scrolling through the rest of the sheet; it has no impact on editing permissions.
What is a web cookie in the context of internet browsing?
A)
Sent from a website and stored in user’s web browser while a user is browsing a website
B)
Sent from user and stored in the server while a user is browsing a website
C)
Sent from root server to all servers
D)
Sent from the root server to other root servers
A web cookie (HTTP cookie) is a small piece of data that a server sends to a user's web browser. The browser stores this data and sends it back to the same server with every subsequent request. This allows websites to 'remember' stateful information, such as items in a shopping cart, user login sessions, or personalized preferences.
Analysis of options:
- Option (a) is correct because it accurately describes the flow: Website (Server) -> Web Browser (Client) for storage.
- Option (b) is incorrect because cookies are primarily stored on the client-side (browser), not the server-side (though server-side sessions exist, the 'cookie' itself is the client-side token).
- Option (c) and (d) are incorrect as they describe server-to-server communication or DNS root server operations, which have nothing to do with the functionality of web cookies.
Which of the following Excel features allows you to restrict the type of data that can be entered into a cell?
A)
Data Validation
B)
Conditional Formatting
C)
Cell Protection
D)
Solver
Step-by-step reasoning:
1. The question asks for a feature that restricts the type of data entered into a cell.
2. Data Validation is a feature in MS Excel specifically designed to control user input. It allows the user to set rules (e.g., only whole numbers, a date range, a list of specific options, or a specific text length) that the data must meet to be accepted into the cell. If the input violates these rules, Excel can display an error alert.
3. Evaluating other options:
- Conditional Formatting (b) changes the appearance (color, font) of a cell based on its value, but it does not stop a user from entering invalid data.
- Cell Protection (c) prevents a user from editing a cell entirely (locking it), but it doesn't restrict the 'type' of data entered if the cell is unlocked for editing.
- Solver (d) is an add-in used for what-if analysis to find an optimal value for a formula in one cell subject to constraints on other cells; it is not an input restriction tool.
Therefore, Data Validation is the correct feature.
Which wireless communication technology is best suited for long-range, low-power IoT and smart city applications?
A)
Zigbee
B)
Bluetooth
C)
LoRaWAN
D)
WiMAX
The question asks for a technology that combines three specific criteria: long-range, low-power, and suitability for IoT/Smart Cities.
1. **LoRaWAN (Long Range Wide Area Network)**: This is a Low Power Wide Area Network (LPWAN) protocol. It is specifically designed for wireless battery-operated devices in regional, national, or global networks. It can transmit data over very long distances (up to 15km in rural areas) while consuming very little power, making it the ideal choice for smart city applications like smart parking, street lighting, and utility metering.
2. **Zigbee (Option a)**: While it is low-power and used for IoT, it is a short-range mesh networking protocol (typically 10-100 meters). It is better suited for home automation than city-wide deployments.
3. **Bluetooth (Option b)**: Bluetooth (including BLE) is designed for Personal Area Networks (PAN). It has a very short range (usually under 100 meters) and is not suitable for long-range infrastructure.
4. **WiMAX (Option d)**: While WiMAX provides long-range connectivity (metropolitan area network), it consumes significantly more power than LPWAN technologies and is designed for high-bandwidth broadband access rather than low-power IoT sensors.
A set of rules followed by each computer on a network for communication is called:
A)
Web
B)
HTTP
C)
Domain
D)
Protocol
In computer networking, a 'Protocol' is defined as a formal set of rules and conventions that govern how data is exchanged between devices on a network. Without these rules, computers would not be able to interpret the electrical signals or data packets sent by another device.
Why other options are incorrect:
- a. Web (World Wide Web): This is an information system where documents and other web resources are identified by URLs and interlinked by hypertext; it is a service that runs on top of the internet, not the set of rules itself.
- b. HTTP (Hypertext Transfer Protocol): While HTTP is indeed a protocol, it is a *specific* protocol used for transferring web pages. The question asks for the general term for 'a set of rules,' making 'Protocol' the more comprehensive and correct answer.
- c. Domain: A domain is a distinct address or name (e.g., google.com) used to identify a website or a group of computers on a network; it is an identifier, not a set of communication rules.
Which protocol is primarily used to send emails?
A)
FTP
B)
HTTP
C)
POP3
D)
SMTP
The question asks for the protocol primarily used to 'send' emails.
1. **SMTP (Simple Mail Transfer Protocol)**: This is the standard protocol used for sending emails from a client (like Outlook or Gmail) to a mail server, and for transferring emails between mail servers. It acts as the 'push' mechanism for email delivery.
2. **POP3 (Post Office Protocol version 3)**: This is used for 'receiving' or retrieving emails from a server to a local client. It typically downloads the email and deletes it from the server, making it a 'pull' mechanism.
3. **HTTP (Hypertext Transfer Protocol)**: This is the foundation of data communication for the World Wide Web (browsing websites). While webmail interfaces use HTTP to display the mail, the underlying transport of the email between servers is handled by SMTP.
4. **FTP (File Transfer Protocol)**: This is used specifically for the transfer of files between a client and a server on a computer network, not for sending emails.
Therefore, SMTP is the correct protocol for sending emails.
Which type of software acts as a mediator between hardware and user applications?
A)
Utility Software
B)
Firmware
C)
Middleware
D)
Operating System
The Operating System (OS) is the primary system software that manages computer hardware and software resources. It acts as an intermediary or mediator between the computer hardware and the user applications. Without an OS, every application would need to include its own code to communicate directly with the hardware (like the CPU, RAM, and Disk), which would be inefficient and complex. The OS provides a set of APIs (Application Programming Interfaces) that allow software to request hardware resources in a standardized way.
Why other options are incorrect:
- a. Utility Software: These are programs designed to help analyze, configure, optimize, or maintain a computer (e.g., antivirus, disk defragmenters). They run on top of the OS, not as a mediator between hardware and apps.
- b. Firmware: This is software programmed into a hardware device (like the BIOS/UEFI). While it initializes hardware, it does not act as the general mediator for user-level applications.
- c. Middleware: This is software that lies between two different applications or services to enable communication (e.g., connecting a database to a web server). It mediates between software components, not between hardware and software.
The device that connects multiple networks and determines the best path for data packets is called:
A)
Hub
B)
Switch
C)
Repeater
D)
Router
The correct answer is a Router. Here is the step-by-step breakdown:
1. **Router (Correct):** A router is a Layer 3 (Network Layer) device in the OSI model. Its primary function is to connect different networks (e.g., connecting a home local area network to the internet). It uses routing tables and protocols to determine the 'best path' (most efficient route) for data packets to travel from the source to the destination.
2. **Hub (Incorrect):** A hub is a Layer 1 (Physical Layer) device. It is a non-intelligent device that broadcasts incoming data packets to all ports, regardless of the destination, which often leads to network congestion and collisions.
3. **Switch (Incorrect):** A switch is a Layer 2 (Data Link Layer) device. While it connects multiple devices within a single network, it uses MAC addresses to send data only to the specific intended device. It does not connect different networks or determine paths between them.
4. **Repeater (Incorrect):** A repeater is a Layer 1 device used to regenerate or amplify signals that have weakened due to distance, allowing the signal to travel further. It does not make routing decisions or connect different networks.
Which GUI element allows multiple applications to run simultaneously by sharing system resources?
A)
Multithreading
B)
Multitasking
C)
Multiprocessing
D)
Multiuser
Step-by-step reasoning:
1. Analysis of the requirement: The question asks for the mechanism that allows multiple applications (processes) to run simultaneously by sharing system resources.
2. Evaluating Option (b) Multitasking: Multitasking is a logical extension of multiprogramming. It allows a user to perform more than one computer task (such as operating an application) at a time. The operating system switches between tasks so rapidly that it creates the illusion that they are running simultaneously, effectively sharing the CPU and memory resources.
3. Evaluating Option (a) Multithreading: This refers to the ability of a single program (process) to divide itself into two or more simultaneously running threads. It is a subset of multitasking but applies to a single application rather than 'multiple applications'.
4. Evaluating Option (c) Multiprocessing: This refers to the use of two or more Central Processing Units (CPUs) within a single computer system. While it enables simultaneous execution, it is a hardware capability rather than a GUI/OS resource-sharing element for applications.
5. Evaluating Option (d) Multiuser: This is a property of an operating system that allows multiple users to access a computer system concurrently (e.g., via terminals), which is different from running multiple applications on a single user interface.
Conclusion: Multitasking is the correct term for the ability of an OS to manage multiple applications concurrently.
Which technology is commonly used to securely connect private networks through public network for collaboration and resource access?
A)
Proxy Server
B)
Remote Desktop
C)
Firewall
D)
Virtual Private Network
The question asks for a technology used to securely connect private networks over a public network (like the Internet).
1. **Virtual Private Network (VPN)**: A VPN creates a secure, encrypted 'tunnel' over a public network. This allows users to send and receive data as if their computing devices were directly connected to the private network, making it the standard technology for secure remote collaboration and resource access.
2. **Proxy Server (Option a)**: A proxy server acts as an intermediary between a client and a server. While it can provide anonymity or caching, its primary purpose is not to create a secure network-to-network tunnel for private resource access.
3. **Remote Desktop (Option b)**: This is a software application that allows a user to control another computer remotely. While it is used for resource access, it is a tool/protocol (like RDP), not the underlying network technology used to securely connect the networks themselves.
4. **Firewall (Option c)**: A firewall is a security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It protects a network but does not provide the connectivity mechanism to link two private networks over a public one.
Which of these is the primary application of VoIP?
A)
Encrypting document
B)
Faster file transfer
C)
Making calls over internet
D)
Offline access to notes
VoIP stands for 'Voice over Internet Protocol'. It is a technology that allows you to make voice calls using a broadband Internet connection instead of a traditional (analog) phone line.
Step-by-step analysis of the options:
- Option (a) 'Encrypting document' refers to cryptography or security software, not communication protocols.
- Option (b) 'Faster file transfer' is handled by protocols like FTP (File Transfer Protocol) or SFTP, not VoIP.
- Option (c) 'Making calls over internet' is the exact definition and primary purpose of VoIP, as it converts voice signals into digital data packets to be transmitted over the IP network.
- Option (d) 'Offline access to notes' refers to local storage or caching mechanisms, which are unrelated to network communication protocols.
In GUI based Operating System design, the principle of ‘affordance’ means?
A)
Interfaces should provide multiple ways to do the same action
B)
The system provides feedback for every action
C)
Interfaces should look consistent across apps
D)
The design should suggest how an object can be used
In the context of Human-Computer Interaction (HCI) and GUI design, 'affordance' refers to the properties of an object that indicate to the user how it can be used. For example, a button that looks 'raised' or '3D' affords clicking, and a slider affords dragging. The goal of affordance is to make the interface intuitive so that users do not need a manual to understand basic interactions.
Analysis of other options:
- Option (a) refers to 'Flexibility' or 'Redundancy' (providing multiple paths to a goal).
- Option (b) refers to 'Feedback' (the system communicating the result of an action).
- Option (c) refers to 'Consistency' (maintaining a uniform look and feel across the system).
Which of the following is the correct order of the OSI model layers (bottom to top)?
A)
Application, Transport, Session, Network, Data Link, Physical, Presentation
B)
Physical, Data Link, Network, Transport, Session, Presentation, Application
C)
Physical, Data Link, Network, Session, Transport, Presentation, Application
D)
Transport, Network, Session, Physical, Data Link, Application, Presentation
The OSI (Open Systems Interconnection) model is a conceptual framework used to understand network interactions in seven distinct layers. The question specifically asks for the order from BOTTOM to TOP.
1. Physical Layer (Layer 1): The lowest layer, dealing with hardware, cables, and bit-stream transmission.
2. Data Link Layer (Layer 2): Handles node-to-node data transfer and error correction (Frames).
3. Network Layer (Layer 3): Manages routing and logical addressing, such as IP addresses (Packets).
4. Transport Layer (Layer 4): Ensures reliable data transfer and flow control (TCP/UDP).
5. Session Layer (Layer 5): Manages sessions between applications.
6. Presentation Layer (Layer 6): Translates, encrypts, and compresses data (Syntax/Formatting).
7. Application Layer (Layer 7): The top layer, providing network services directly to the user (HTTP, FTP, SMTP).
Comparing this to the options:
- Option (a) is the order from Top to Bottom.
- Option (b) correctly lists the layers from Bottom (Physical) to Top (Application).
- Option (c) incorrectly swaps the Session and Transport layers.
- Option (d) is in a random, incorrect order.
In a URL such as https://www.example.com:443/index.html, the number 443 refers to:
A)
Port number
B)
IP address
C)
File size
D)
Security certificate ID
A Uniform Resource Locator (URL) consists of several components: the protocol (https), the domain name (www.example.com), the port number (443), and the path to the resource (/index.html).
1. **Port Number (Option a):** In networking, a port is a communication endpoint. The number following the colon (:) in a URL specifies the port on the server that the client should connect to. Port 443 is the standard default port for HTTPS (Hypertext Transfer Protocol Secure) traffic.
2. **IP Address (Option b):** An IP address is a numerical label assigned to each device connected to a computer network (e.g., 192.0.2.1). While the domain 'www.example.com' resolves to an IP address via DNS, the number 443 is not the IP address itself.
3. **File Size (Option c):** File size refers to the amount of data a file occupies on a disk (e.g., 10 KB). It is never part of the URL structure.
4. **Security Certificate ID (Option d):** While HTTPS uses SSL/TLS certificates for security, the certificate ID is contained within the certificate metadata exchanged during the handshake process, not as a visible numerical value in the URL string.
Page 26
← Prev
Next →