Computer Science – 100 MCQs

1. Which memory is volatile?
  • RAM
  • ROM
  • SSD
  • HDD
2. What does ROM stand for?
  • Random Operation Memory
  • Read-Only Memory
  • Rapid Output Module
  • Read-On Memory
3. The brain of the computer is the:
  • GPU
  • CPU
  • RAM
  • Motherboard
4. Which screen type uses liquid crystals to display images?
  • CRT
  • LCD
  • OLED
  • Plasma
5. Which processor component performs arithmetic/logical operations?
  • Cache
  • ALU
  • Control Unit
  • Registers
6. Which OS is open-source?
  • Windows
  • Linux
  • macOS
  • iOS
7. Full form of GUI in OS:
  • Graphical User Interface
  • General Utility Interface
  • Global User Integration
  • Graphics Unified Input
8. Standard HD resolution is:
  • 720×480
  • 1280×720
  • 1920×1080
  • 3840×2160
9. Which OS uses the NT kernel?
  • macOS
  • Windows
  • Android
  • Ubuntu
10. Which is NOT an OS task?
  • Memory Management
  • Designing Websites
  • Process Scheduling
  • File Management
11. Microsoft Word is a:
  • Word Processor
  • Spreadsheet Tool
  • Database Software
  • Presentation Tool
12. Google’s parent company is:
  • Alphabet
  • Meta
  • Microsoft
  • Amazon
13. YouTube was founded in:
  • 2003
  • 2005
  • 2010
  • 1999
14. LinkedIn is primarily for:
  • Professional Networking
  • Video Streaming
  • Gaming
  • Cloud Storage
15. HTML stands for:
  • HyperText Markup Language
  • High-Level Machine Language
  • Hyperlink Text Manager
  • Home Tool Management Language
16. CSS is used for:
  • Styling web pages
  • Database queries
  • Server-side scripting
  • Hardware control
17. Python is a:
  • High-level language
  • Low-level language
  • Assembly language
  • Machine language
18. JavaScript is mainly used for:
  • Client-side scripting
  • Database management
  • OS development
  • Graphic design
19. OTP stands for:
  • One-Time Password
  • Online Transaction Protocol
  • Official Transfer Process
  • Open Text Permission
20. Phishing attacks target:
  • Personal data
  • Computer hardware
  • Internet speed
  • Screen resolution
21. A strong password should include:
  • Letters, numbers, symbols
  • Only letters
  • Your birthdate
  • Common words
22. Two-factor authentication (2FA) uses:
  • Password + OTP
  • Two passwords
  • Biometrics only
  • No verification
23. Malware that encrypts files is called:
  • Ransomware
  • Spyware
  • Adware
  • Worm
24. ChatGPT is developed by:
  • Google
  • OpenAI
  • Microsoft
  • IBM
25. AI used in self-driving cars is:
  • Machine Learning
  • Blockchain
  • Quantum Computing
  • Virtual Reality
26. SEO stands for:
  • Search Engine Optimization
  • Secure Email Operation
  • System Error Override
  • Software Engineering Object
27. Upwork is a platform for:
  • Freelancers
  • Social Networking
  • Cloud Storage
  • Gaming
28. Fiverr’s minimum service price was originally:
  • $5
  • $10
  • $1
  • $20
29. WordPress is a:
  • CMS (Content Management System)
  • Programming Language
  • Cybersecurity Tool
  • Hardware Device
30. E-commerce example:
  • Amazon
  • GitHub
  • ChatGPT
  • Linux
31. Gmail’s storage is tied to:
  • Google Drive
  • Dropbox
  • OneDrive
  • iCloud
32. Adobe Photoshop is used for:
  • Graphic Design
  • Coding
  • Database Management
  • Email Services
33. Data Science primarily uses:
  • Python/R
  • HTML/CSS
  • SQL only
  • Assembly
34. 4K resolution is approximately:
  • 3840×2160
  • 1920×1080
  • 1280×720
  • 2560×1440
35. CRT screens are outdated due to:
  • High power consumption
  • Low resolution
  • Small size
  • Fast refresh rates
36. The clock speed of a CPU is measured in:
  • Bytes
  • Hertz (Hz)
  • Volts
  • Watts
37. Which processor architecture dominates modern laptops?
  • x86-64
  • ARM32
  • RISC-V
  • MIPS
38. OLED screens offer better:
  • Contrast ratios
  • Refresh rates
  • Power efficiency
  • Durability
39. Real-time OS is used in:
  • Medical devices
  • Gaming PCs
  • Word processors
  • Web browsers
40. System calls interface between:
  • Apps and OS
  • CPU and GPU
  • RAM and SSD
  • Keyboard and mouse
41. Which file system is native to Windows?
  • NTFS
  • ext4
  • APFS
  • FAT16
42. Google Drive is an example of:
  • Cloud storage
  • Antivirus
  • Video editor
  • Programming language
43. Microsoft Excel is used for:
  • Spreadsheets
  • Photo editing
  • Coding
  • Presentations
44. YouTube’s algorithm prioritizes:
  • Watch time
  • Like-to-dislike ratio
  • Video length
  • Creator subscribers
45. LinkedIn’s “Endorsements” feature highlights:
  • Skills
  • Education
  • Hobbies
  • Family connections
46. Python’s “Pandas” library is for:
  • Data analysis
  • Game development
  • Cybersecurity
  • Hardware control
47. CSS “Flexbox” is used for:
  • Layout design
  • Database queries
  • User authentication
  • Data analysis
48. API endpoints return data in:
  • JSON/XML
  • Binary
  • Python code
  • SQL tables
49. GitHub is primarily for:
  • Code collaboration
  • Social networking
  • Cloud hosting
  • Graphic design
50. “SaaS” examples include:
  • Google Workspace
  • NVIDIA GPUs
  • DDR5 RAM
  • PCIe SSDs
51. Fiverr’s “Gig Extras” allow:
  • Upselling services
  • Free downloads
  • Hardware upgrades
  • OS installation
52. WordPress plugins add:
  • Functionality
  • CPU cores
  • RAM slots
  • GPU memory
53. Shopify is a(n):
  • E-commerce platform
  • Programming language
  • Cybersecurity tool
  • Data structure
54. OTP timeouts enhance:
  • Security
  • Screen brightness
  • Data storage
  • CPU overclocking
55. “Canva” is a:
  • Graphic design tool
  • Programming IDE
  • Database
  • OS
56. “404” is a(n):
  • HTTP error
  • CPU model
  • Python library
  • Encryption standard
57. Which memory type loses data when power is off?
  • RAM
  • ROM
  • SSD
  • HDD
58. BIOS firmware is stored in:
  • ROM
  • RAM
  • GPU
  • HDD
59. CPU cache memory is faster than RAM because it’s:
  • Closer to the CPU
  • Larger in size
  • Non-volatile
  • Used for long-term storage
60. Which screen type has the best color accuracy?
  • OLED
  • LCD
  • CRT
  • LED
61. The ALU in a CPU performs:
  • Arithmetic/Logical operations
  • Data storage
  • Internet connectivity
  • Graphics rendering
62. Which OS uses the Linux kernel?
  • Ubuntu
  • Windows
  • macOS
  • iOS
63. The “Blue Screen of Death” occurs in:
  • Windows
  • Linux
  • macOS
  • Android
64. Android OS is based on:
  • Linux
  • Windows NT
  • Unix
  • macOS
65. Microsoft Excel files use the extension:
  • .xlsx
  • .docx
  • .pptx
  • .accdb
66. Google’s search algorithm prioritizes:
  • Relevance & Authority
  • Payment from websites
  • Alphabetical order
  • Flashy animations
67. YouTube’s “Monetization” requires:
  • 1,000 subscribers
  • 100 subscribers
  • 10,000 views
  • No requirements
68. WordPress is written in:
  • PHP
  • Python
  • Java
  • C++
69. Two-factor authentication (2FA) combines:
  • Password + OTP
  • Two passwords
  • Username + Email
  • CPU + GPU
70. A “DDoS” attack floods a server with:
  • Fake traffic
  • Viruses
  • Spam emails
  • Hardware damage
71. “Phishing” scams often use:
  • Fake emails
  • Slow internet
  • Outdated software
  • High-resolution images
72. VPNs encrypt:
  • Internet traffic
  • Hard drive data
  • CPU operations
  • Screen output
73. “Zero-Day Exploit” targets:
  • Unknown vulnerabilities
  • Old software
  • Hardware defects
  • User passwords
74. ChatGPT is a type of:
  • LLM (Large Language Model)
  • Database
  • Operating system
  • Graphics card
75. Which memory is volatile?
  • Human brain neurons
  • Quantum physics
  • Blockchain
  • Cloud storage
76. Fiverr’s gigs start at:
  • $5
  • $10
  • $1
  • Free
77. Upwork connects:
  • Freelancers & clients
  • Social media influencers
  • Cloud providers
  • Gamers
78. “CTA” in marketing means:
  • Call-To-Action
  • Computer-Tested Algorithm
  • Certified Technical Advisor
  • Central Traffic Authority
79. Shopify is a(n):
  • E-commerce platform
  • Programming language
  • Cybersecurity tool
  • Data structure
80. “Backlinks” improve:
  • SEO ranking
  • CPU performance
  • Screen resolution
  • Battery life
81. Gmail’s “Confidential Mode” prevents:
  • Forwarding/printing
  • Spam
  • Account deletion
  • Ads
82. OTP codes expire to:
  • Enhance security
  • Save storage
  • Reduce network load
  • Improve screen brightness
83. Adobe Photoshop is a:
  • Raster graphics editor
  • Video editor
  • Database tool
  • Programming IDE
84. “Canva” is used for:
  • Graphic design
  • Coding
  • Data analysis
  • OS development
85. “404 Error” means:
  • Page not found
  • Server overload
  • Payment required
  • Access denied
86. Python’s “NumPy” library is for:
  • Numerical computing
  • Web design
  • Cybersecurity
  • Hardware control
87. “Big Data” refers to:
  • Large datasets
  • Big screens
  • Long passwords
  • High-resolution images
88. “Firewall” protects against:
  • Unauthorized access
  • Power surges
  • Screen burn-in
  • Data compression
89. “Dropbox” is a:
  • Cloud storage service
  • Programming language
  • Operating system
  • Graphics card
90. “Agile” is a:
  • Software development method
  • Cybersecurity tool
  • Hardware component
  • Network protocol
91. “MidJourney” generates:
  • AI art
  • Spreadsheets
  • Databases
  • Emails
92. “CAPTCHA” verifies:
  • Human users
  • Network speed
  • Screen resolution
  • CPU temperature
93. “Meta” owns:
  • Facebook & Instagram
  • Google & YouTube
  • Microsoft & LinkedIn
  • Apple & macOS
94. “Git” is used for:
  • Version control
  • Graphic design
  • Data storage
  • Email encryption
95. “Responsive design” ensures websites work on:
  • All devices
  • Windows only
  • High-end PCs
  • Printers
96. A “Zero-Day Vulnerability” refers to:
  • An unpatched software flaw
  • A expired password
  • A new firewall
  • A hardware defect
97. “MapReduce” is used for:
  • Processing large datasets in parallel
  • Data visualization
  • Network routing
  • Screen rendering
98. Proof-of-Work (PoW) consensus requires:
  • High computational power
  • Centralized authority
  • Low energy usage
  • Physical hardware tokens
99. “Dark Patterns” in UI design are:
  • Deceptive interfaces that manipulate users
  • Low-contrast color schemes
  • Voice-controlled systems
  • Touchscreen gestures
100. The “Trolley Problem” is often discussed in:
  • AI ethics
  • Database design
  • Network topology
  • Screen manufacturing