Information Technology & Misc MCQ

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CPU stands for Central Processing Unit — the "brain" of a computer that executes instructions. The other expansions are not standard industry terms.

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RAM (Random Access Memory) is volatile — its contents are lost when power is removed. ROM, SSDs, and flash drives are non-volatile storage.

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An operating system manages hardware resources (CPU, memory, storage, devices) and provides services so applications can run. Word processors and browsers are application software, not operating systems.

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Binary is base-2 and uses only 0 and 1. Decimal is base-10, octal is base-8, and hexadecimal is base-16 and uses digits 0-9 and letters A-F.

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Cloud computing means accessing computing resources like servers, storage, and software over the internet rather than owning and maintaining physical infrastructure yourself.

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System software, like an operating system, manages hardware and provides a platform for other programs. Word, Photoshop, and Chrome are application software that run on top of the OS.

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A web browser (such as Chrome, Firefox, or Safari) requests web pages from servers and renders them for the user. It does not compile programs or manage local files as its core purpose.

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IoT stands for Internet of Things — a network of physical devices (sensors, appliances, vehicles) that connect to the internet and exchange data.

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SSDs use flash memory with no moving parts, making them significantly faster than HDDs, optical discs, or magnetic tape, which rely on mechanical movement.

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A byte consists of 8 bits and is the standard unit for measuring data size. A single binary digit (0 or 1) is called a bit, not a byte.

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Application software helps users accomplish specific tasks (e.g., word processing, photo editing). Managing hardware directly and booting the system are roles of system software/firmware.

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SaaS (Software as a Service) delivers ready-to-use software applications over the internet, such as Gmail or Salesforce, without users needing to install or maintain them locally.

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Antivirus software scans for, blocks, and removes malware such as viruses, worms, and trojans, helping protect a system from malicious threats.

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URL stands for Uniform Resource Locator — the address used to locate a resource, such as a web page, on the internet.

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A keyboard is an input device that lets users send data to the computer. Monitors, printers, and speakers are output devices that present information to the user.

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A firewall acts as a barrier between trusted and untrusted networks, filtering traffic according to defined security rules to block unauthorized access.

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GUI stands for Graphical User Interface — a visual way of interacting with a computer using elements like windows, icons, and menus, as opposed to a text-based command line.

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Virtualization creates software-based (virtual) versions of physical resources like servers or storage, allowing multiple virtual machines to run on one physical machine.

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Cloud storage lets users access, sync, and share files from any device with an internet connection. It typically requires connectivity, may have costs, and does not eliminate the need for good backup practices.

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Spam refers to unsolicited bulk email, often advertising or fraudulent. Phishing is a targeted scam to steal information, malware is malicious software, and cookies are small data files stored by browsers.

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A router forwards data packets between networks, directing traffic between connected devices and the internet. It is not a power converter, printer, or storage device.

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Agile is an iterative approach that values collaboration, customer feedback, and the ability to adapt to changing requirements, rather than rigid upfront planning.

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Wi-Fi is a wireless networking technology that allows devices like laptops and phones to connect to a local network and the internet without using physical cables.

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Strong passwords are long, unique per account, and combine letters, numbers, and symbols, making them harder to guess or crack. Reusing passwords or using personal details weakens security.

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Open-source software makes its source code publicly available so others can view, modify, and redistribute it. Freeware is free to use but the source code is usually not provided.

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Ergonomics is the practice of designing workspaces, furniture, and equipment to fit users comfortably, reducing physical strain and improving productivity and well-being.

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Microsoft Office is a productivity software suite that includes applications like Word, Excel, and PowerPoint for everyday office tasks. The other options are system-level or networking components.

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Version control systems track changes to files over time, allowing teams to collaborate, review history, and revert to previous versions when needed.

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USB stands for Universal Serial Bus — a common standard for connecting peripherals like keyboards, drives, and chargers to computers and other devices.

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Phishing is a social-engineering attack where scammers impersonate legitimate organizations (often via email) to trick victims into revealing passwords, card numbers, or other sensitive data.

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Touch typing is the skill of typing without looking at the keys, which generally improves typing speed and accuracy over time through muscle memory.

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Bandwidth measures the maximum amount of data that can be transmitted over a network connection in a given time, often expressed in Mbps or Gbps.

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2FA requires a second verification step (such as a code sent to your phone) in addition to your password, making it much harder for attackers to gain access even if they know your password.

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E-waste refers to discarded electronics like old computers and phones. Improper disposal can release hazardous materials, which is why responsible recycling is part of "green IT" practices.

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A blog is a website where individuals or organizations regularly publish written content, often in reverse chronological order, on topics of interest.

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AR stands for Augmented Reality — technology that overlays digital content (images, information) onto the real world, often viewed through a smartphone or headset.

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An IT help desk is the first point of contact for users needing technical assistance, helping resolve issues, answer questions, and escalate complex problems when necessary.

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.zip is a widely used compressed archive format that bundles and shrinks one or more files. .exe, .dll, and .sys are typically executable or system files, not archive formats.

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A backup is a duplicate copy of important data, stored separately, so it can be restored in case the original is lost, corrupted, or damaged.

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A mouse and a scanner are input devices because they send data or commands into the computer. Monitors, projectors, speakers, and printers are output devices that present results to the user.

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IaaS provides virtualized computing resources (servers, storage, networks) while leaving the customer responsible for the OS, runtime, and applications. PaaS abstracts the OS away, and SaaS delivers complete applications.

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Scrum is an Agile framework that organizes work into time-boxed sprints and defines specific roles (Product Owner, Scrum Master, Development Team) and ceremonies like daily stand-ups and retrospectives.

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Waterfall progresses through fixed sequential phases (requirements, design, build, test, deploy), while Agile breaks work into short iterative cycles that allow continuous feedback and adaptation to change.

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An SLA is a formal commitment between a service provider and a customer that specifies measurable targets, such as uptime percentages and response or resolution times, and the consequences of not meeting them.

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Load balancers spread incoming requests across multiple servers, preventing any single server from being overwhelmed, improving response times, and increasing overall system reliability.

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A hybrid cloud combines private infrastructure (on-premises or private cloud) with public cloud services, allowing data and applications to move between them for flexibility, scalability, and cost optimization.

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Blockchain is a decentralized, distributed ledger technology where data is grouped into cryptographically linked blocks, making records very difficult to alter retroactively without network consensus.

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Data visualization turns raw data into visual formats like charts, graphs, and dashboards, helping people quickly identify trends, outliers, and patterns that would be hard to spot in raw numbers.

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The Product Owner represents the stakeholders' interests, defines and prioritizes the product backlog, and ensures the team is working on the highest-value features first.

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Effective troubleshooting starts with the simplest, least destructive checks — physical connections, Wi-Fi status, and whether the issue affects other devices — before considering drastic measures like reinstalling the OS.

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Containerization bundles an application with its libraries and dependencies into a portable unit, ensuring it behaves consistently whether run on a developer's laptop, a test server, or in production.

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COBIT (Control Objectives for Information and Related Technologies) is a governance framework that helps organizations align IT strategy with business goals, manage risk, and meet regulatory and compliance requirements.

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Responsive web design uses flexible layouts, images, and CSS media queries so that a website adjusts smoothly to various screen sizes, from desktops to tablets to smartphones.

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Machine learning involves training systems on data so they can identify patterns and make predictions or decisions, improving over time, rather than relying solely on hand-coded rules for every case.

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Accessibility focuses on designing products usable by people with a wide range of abilities, including those with visual, auditory, motor, or cognitive impairments — for example, through screen-reader support and keyboard navigation.

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Scalability refers to a system's capacity to grow — handling more users, data, or transactions — by adding resources (scaling up or out) without requiring a complete redesign.

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CompTIA A+ is a widely recognized entry-level certification that validates foundational skills in hardware, software, troubleshooting, and IT support — a common starting point for help-desk and technician roles.

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A branch lets a developer experiment with or build a feature independently of the main codebase. Once the work is ready and tested, it can be merged back, reducing the risk of disrupting others' work.

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Green IT focuses on minimizing the environmental footprint of technology — for example, through energy-efficient data centers, virtualization to reduce hardware needs, and proper recycling of electronic waste.

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Single sign-on lets users authenticate once and then access multiple connected applications or services without having to log in again separately for each one, improving convenience and often security.

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A Gantt chart is a horizontal bar chart that illustrates a project schedule — showing when tasks start and end, their durations, and how they depend on one another.

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A wireframe is a low-fidelity layout sketch that shows where elements like navigation, content, and buttons will go, helping teams plan structure and functionality before investing in detailed visual design.

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Edge computing brings computation and data storage closer to the data source (e.g., IoT devices, local servers), reducing the latency and bandwidth costs of sending all data to a distant centralized cloud.

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Metadata is "data about data" — for example, a photo's metadata might include the camera model, date taken, and location, while a document's metadata might include its author and last-modified date.

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Slack and Microsoft Teams are team communication and collaboration platforms that combine messaging, file sharing, and video calls to help distributed teams work together.

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Automation handles repetitive, well-defined tasks consistently and quickly, reducing human error and freeing IT staff to focus on more complex problems — though oversight and monitoring are still necessary.

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Escalation is the process of routing an issue to someone with more specialized knowledge, higher authority, or more resources when the current support tier cannot resolve it within expected timeframes.

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A/B testing shows two variants (A and B) of something — like a button color or headline — to different user groups and measures which one achieves better results, guiding data-driven design decisions.

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Digital transformation is a strategic, organization-wide shift that uses technology to change processes, culture, and customer experiences — going far beyond simply digitizing documents.

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A data analyst gathers and examines data, looking for trends and patterns, and presents findings (often through reports or visualizations) that help organizations make informed decisions.

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Synchronous communication (e.g., video calls, instant messaging) happens in real time, while asynchronous communication (e.g., email, recorded videos, shared documents) lets participants respond on their own schedules.

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Change management provides a structured process for proposing, assessing, approving, and implementing changes to IT systems, reducing the risk of unexpected disruptions or outages.

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Big Data is commonly described by three (or more) Vs: Volume (large amounts of data), Velocity (speed of generation/processing), and Variety (different data types and sources).

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Choosing between public and private cloud often comes down to trade-offs between cost and scalability (public cloud strengths) versus control, customization, and compliance requirements (private cloud strengths).

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An MVP is a stripped-down version of a product that includes only the essential features needed to test an idea with real users and gather feedback before investing in full development.

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Good documentation captures how systems and processes work, making it easier for current and future team members to understand, maintain, troubleshoot, and onboard without relying solely on one person's memory.

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PaaS provides a managed platform — including servers, operating systems, and runtime environments — so developers can focus on writing and deploying application code rather than maintaining infrastructure. IaaS still requires OS-level management, and DaaS targets virtual desktops, not app development.

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When multiple incidents share a common root cause, ITSM best practice is to raise a problem record to investigate and fix the underlying issue — preventing recurrence — rather than just repeatedly resolving symptoms ticket by ticket.

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Data is raw, unprocessed facts (e.g., a list of numbers), while information results from organizing, processing, or contextualizing that data so it becomes meaningful and actionable for decision-making.

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Recorded walkthroughs let team members in different time zones consume the content on their own schedule — a hallmark of asynchronous collaboration. Live calls, instant replies, and pair programming all require participants to be present and engaged at the same time, which is synchronous.

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Hybrid architecture decisions hinge on factors like where data legally must reside (data sovereignty), industry compliance mandates, sensitivity of the workload, and latency or performance requirements — not cosmetic or unrelated factors.

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Microservices allow teams to scale, deploy, and update components independently, but this comes at the cost of increased operational complexity — including service discovery, network communication, distributed tracing, and coordination overhead — compared to a single monolithic codebase.

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IT governance frameworks exist to ensure that technology decisions and investments support broader business goals, with clear accountability structures, risk oversight, and ways to measure whether IT delivers expected value.

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Blockchains rely on consensus algorithms — like proof-of-work (used by Bitcoin) or proof-of-stake — that let geographically distributed, mutually distrusting participants agree on a single shared transaction history without a central authority.

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RTO defines how long an organization can tolerate a system being down before it must be restored, while RPO defines how much data (measured in time, e.g., "up to 1 hour of data") the organization can afford to lose. They address different aspects of resilience planning.

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Scaled Agile frameworks address the challenge of coordinating many interdependent teams across a large organization — aligning their work with enterprise strategy, managing dependencies, and maintaining consistent governance — something a single Scrum team's practices don't inherently solve at scale.

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Edge computing introduces unique challenges: coordinating software updates and security patches across many remote, resource-constrained devices, handling intermittent connectivity, and ensuring consistent behavior despite hardware and network variability — issues less pronounced in centralized data centers.

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Data warehouses store cleaned, structured data modeled for specific reporting and analysis needs (schema-on-write), whereas data lakes retain raw data in its original format from many sources, with structure applied later when the data is used (schema-on-read).

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Technical debt is a metaphor for the long-term costs incurred when teams choose expedient solutions over more robust ones — extra effort will eventually be needed to refactor, fix, or replace that work, much like interest accruing on a loan.

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Incident management is concerned with restoring service quickly after a disruption (treating the symptom), while problem management digs into the underlying root causes of recurring incidents to prevent them from recurring (treating the disease).

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Zero trust assumes no user or device should be automatically trusted, whether inside or outside the network. It requires continuous verification of identity, device health, and context for every access request, replacing the older "trust but verify the perimeter" model.

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Vertical scaling ("scaling up") means adding more resources — CPU, RAM, storage — to an existing machine, while horizontal scaling ("scaling out") means adding more machines or instances and distributing the workload across them, often improving fault tolerance as well as capacity.

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Enterprise AR/VR adoption has been shaped by practical constraints: the cost and availability of headsets, the heavy processing and rendering power needed for smooth, low-latency experiences (to avoid motion sickness), and the specialized effort required to create compatible content.

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In an API-first approach, teams define and agree on API contracts early, allowing frontend, backend, and partner teams to build against a stable interface in parallel. This promotes consistency, reuse, and smoother integration across systems and organizational boundaries.

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Vendor lock-in risk centers on portability — how dependent a system becomes on a provider's proprietary services, how costly it would be to move data out (egress fees), and whether the architecture could realistically run elsewhere without a costly rebuild.

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Capacity planning seeks a balance: provisioning purely for worst-case peaks can waste money on idle resources most of the time, while ignoring growth trends risks future shortages. Modeling both trends and projected growth helps organizations scale resources cost-effectively and proactively.

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Infrastructure as code lets teams define servers, networks, and other resources in version-controlled configuration files (e.g., Terraform, CloudFormation), making environments reproducible, auditable, and far less prone to the inconsistencies and human error of manual configuration — crucial when managing infrastructure at scale.

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A risk assessment is a structured process of identifying what could go wrong (threats/vulnerabilities), estimating how likely and how damaging each scenario would be, and then deciding on an appropriate response — mitigating, transferring (e.g., insurance), or knowingly accepting the risk.

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Privacy by design means proactively building data protection — such as data minimization, encryption, and access controls — into systems from the earliest design stages, rather than retrofitting compliance measures after deployment, which tends to be costlier and less effective.

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Achieving interoperability typically means bridging differences in data formats, protocols, and business logic between systems that were never designed to talk to each other — often solved through shared standards, middleware, or well-designed APIs that translate and coordinate between them.