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The Linux command to list all files including hidden ones is ls ________.
Answer: -a
ls -a lists all files including hidden ones (starting with .). ls -l shows detailed list; ls -h makes sizes human-readable; ls -la combines both. Hidden files store configuration data. Understanding command-line flags is fundamental for Linux administration questions in technical exams.
JavaScript is primarily executed on the server-side in web applications.
- True
- False
Answer: False
JavaScript was designed for client-side execution in web browsers to enable interactive web pages. Server-side JavaScript (Node.js) is possible but not the primary use case. Understanding client-server architecture is fundamental for web technology questions in SSC and banking exams.
The HTML tag used to create a hyperlink is ________.
Answer: <a>
The anchor tag <a> with href attribute creates hyperlinks in HTML. Example: <a href='https://example.com'>Link</a>. Fundamental for web development basics tested in SSC and Railway exams. Other tags: <img> for images, <p> for paragraphs, <div> for containers.
In Python, lists are mutable while tuples are immutable.
- True
- False
Answer: True
Lists ([]) can be modified after creation: append, remove, change elements. Tuples (()) cannot be changed once created, making them hashable and usable as dictionary keys. Immutability provides safety for fixed data, while mutability offers flexibility for dynamic collections. Choosing appropriately improves code correctness and performance.
Which data type is used to store true/false values in most programming languages?
- int
- char
- boolean
- float
Answer: boolean
Boolean data type represents two values: true or false. Named after George Boole, founder of Boolean algebra. Used in conditional statements, loops, and logical operations. Some languages (C) use integers (0=false, non-zero=true), but modern languages (Java, Python, C#) have dedicated bool type for clarity and type safety.
Ohm's Law states that current through a conductor is directly proportional to voltage and inversely proportional to resistance.
- True
- False
Answer: True
Ohm's Law: I = V/R, where I=current (Amperes), V=voltage (Volts), R=resistance (Ohms). Fundamental for circuit analysis, component selection, and troubleshooting. Applies to ohmic materials at constant temperature. Non-ohmic devices (diodes, transistors) have non-linear V-I characteristics requiring advanced modeling.
Which operator is used to check equality of values in most programming languages?
- =
- ==
- ===
- :=
Answer: ==
Double equals (==) checks value equality in C, Java, Python, JavaScript. Single equals (=) is assignment operator. Triple equals (===) in JavaScript checks value AND type equality. := is assignment in Pascal/Go. Understanding operator precedence and type coercion is crucial for writing correct conditional logic in exams and real code.
Which initiative provides a digital platform for citizens to participate in policy discussions and give feedback?
- UMANG
- MyGov
- DigiLocker
- e-Taal
Answer: MyGov
MyGov is a citizen engagement platform launched under Digital India. Enables Indians to participate in policy discussions, submit ideas, vote on proposals, and provide feedback on government initiatives. Fosters collaborative governance, transparent decision-making, and inclusive policy formulation through digital participation.
PSLV has four stages using solid and liquid propulsion alternately.
- True
- False
Answer: True
PSLV has four stages: 1st and 3rd use solid propellant; 2nd and 4th use liquid propellant. Strap-on solid boosters enhance lift-off thrust. This alternating design optimizes performance for polar and sun-synchronous orbits. PSLV's reliability and versatility made it ISRO's workhorse for earth observation and small satellite launches.
Which platform allows citizens to report grievances related to government services and track resolution status?
- MyGov
- CPGRAMS
- UMANG
- DigiLocker
Answer: CPGRAMS
CPGRAMS (Centralized Public Grievance Redress and Monitoring System) is an online platform for lodging and tracking grievances against central government ministries/departments. Features: unique registration number, escalation mechanism, time-bound resolution, and public dashboard. Promotes accountability and responsive governance.
The cloud service model where the provider manages infrastructure and platform, while customer manages applications and data, is called ________ as a Service.
Answer: Platform
PaaS (Platform as a Service) provides development platforms (runtime, middleware, OS) managed by provider. Customers deploy and manage applications and data without worrying about infrastructure. Examples: Google App Engine, AWS Elastic Beanstalk, Azure App Service. Contrasts with IaaS (customer manages OS+) and SaaS (provider manages all).
Which initiative provides a unified interface for citizens to access multiple government services?
- MyGov
- UMANG
- DigiLocker
- All of these
Answer: UMANG
UMANG (Unified Mobile Application for New-age Governance) is a single app providing access to 1,200+ central and state services: Aadhaar, PAN, EPFO, utilities, education, health. Features: multilingual support, voice search, offline access. MyGov is for engagement; DigiLocker for documents; UMANG for service delivery.
What does 'LAN' stand for in networking?
- Large Area Network
- Local Area Network
- Long Access Network
- Linked Access Node
Answer: Local Area Network
LAN (Local Area Network) connects devices within a limited area like home, office, or campus using Ethernet or Wi-Fi. Enables resource sharing (printers, files) and internet access. Contrasted with WAN (Wide Area Network) like internet that spans large geographic distances.
Which file extension is used for spreadsheet files in Microsoft Excel?
- .docx
- .xlsx
- .pptx
Answer: .xlsx
.xlsx is the default extension for Excel workbooks (XML-based format introduced in Office 2007). Older .xls format is binary. Other extensions: .docx (Word), .pptx (PowerPoint), .pdf (portable document). File extensions help OS identify appropriate applications for opening files.
The Ayushman Bharat Digital Mission creates unique health IDs for citizens.
- True
- False
Answer: True
Ayushman Bharat Digital Mission (ABDM) assigns 14-digit ABHA (Ayushman Bharat Health Account) numbers as unique health IDs. Enables consent-based sharing of health records across providers, teleconsultations, and personalized care. Part of India's digital health infrastructure transformation.
Which port is commonly used for connecting a keyboard to a computer?
- HDMI
- USB
- VGA
- Ethernet
Answer: USB
USB (Universal Serial Bus) is the standard port for keyboards, mice, and most peripherals. Replaced legacy PS/2 ports. USB-C offers reversible connector and higher power/data transfer. Wireless keyboards use Bluetooth or RF dongles, but USB remains universal for wired connections.
Which key is used to toggle between uppercase and lowercase typing?
- Shift
- Caps Lock
- Ctrl
- Alt
Answer: Caps Lock
Caps Lock toggles alphabetic keys to produce uppercase letters without holding Shift. Shift produces uppercase only while pressed. Caps Lock indicator (LED) shows active state. Useful for typing headings or acronyms; accidental activation is a common user frustration.
Aadhaar-based e-KYC eliminates the need for physical document verification in many services.
- True
- False
Answer: True
e-KYC (Electronic Know Your Customer) uses Aadhaar authentication to verify identity digitally, reducing paperwork and processing time. Enabled for banking, telecom, pensions, and subsidies. Consent-based and secure, with audit trails. Supreme Court guidelines ensure privacy and purpose limitation.
The shortcut key to refresh a webpage in most browsers is ________.
Answer: F5 or Ctrl+R
F5 or Ctrl+R refreshes/reloads the current webpage to fetch latest content from server. Ctrl+F5 performs hard refresh bypassing cache. These shortcuts improve productivity when checking for updated information or troubleshooting loading issues.
The mobile app for booking LPG cylinders under Digital India is called ________.
Answer: PAHAL/MyLPG
PAHAL (Pratyaksh Hanstantrit Labh) is the DBT scheme for LPG subsidies, accessible via MyLPG app. Enables direct subsidy transfer to bank accounts, reducing leakage and ensuring benefits reach genuine beneficiaries.