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Computer Science MCQs

MCQs on Programming, Networking, Database and OS

62 Questions
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21
Medium css fpsc

What is the purpose of a compiler?

  • A Execute programs directly
  • B Translate source code into machine code
  • C Store data permanently
  • D Manage networks
Permalink
Correct Answer: Option B — Translate source code into machine code
Explanation: A compiler converts high-level programming language code into machine code that can be executed by a computer. It also checks syntax and reports programming errors.
Submitted by: PaperMCQs
22
Medium fpsc nts

Which Excel function counts non-empty cells?

  • A COUNT()
  • B COUNTA()
  • C COUNTIF()
  • D SUM()
Permalink
Correct Answer: Option B — COUNTA()
Explanation: COUNTA counts all non-empty cells including text, numbers, and logical values. It is useful when determining how many cells contain data regardless of data type.
Submitted by: PaperMCQs
23
Medium css fpsc

What is artificial intelligence?

  • A Computer hardware
  • B Simulation of human intelligence by machines
  • C Network design
  • D Database storage
Permalink
Correct Answer: Option B — Simulation of human intelligence by machines
Explanation: Artificial Intelligence enables machines to perform tasks requiring human-like reasoning and learning.
Submitted by: PaperMCQs
24
Medium css fpsc

Which database operation removes a table completely?

  • A DELETE
  • B REMOVE
  • C DROP
  • D CLEAR
Permalink
Correct Answer: Option C — DROP
Explanation: DROP permanently removes an entire database object including structure and data.
Submitted by: PaperMCQs
25
Medium css fpsc

Which cyberattack encrypts files and demands payment?

  • A Spyware
  • B Ransomware
  • C Adware
  • D Trojan
Permalink
Correct Answer: Option B — Ransomware
Explanation: Ransomware locks or encrypts data and demands a ransom for restoration.
Submitted by: PaperMCQs
26
Medium css pms

What is multitasking in an operating system?

  • A Using multiple monitors
  • B Running multiple processes concurrently
  • C Installing multiple OS
  • D Using many files
Permalink
Correct Answer: Option B — Running multiple processes concurrently
Explanation: Multitasking enables an operating system to execute multiple programs seemingly at the same time.
Submitted by: PaperMCQs
27
Medium fpsc nts

Which protocol is used for receiving email in modern systems?

  • A IMAP
  • B SMTP
  • C DNS
  • D FTP
Permalink
Correct Answer: Option A — IMAP
Explanation: IMAP allows users to access and manage email directly on the server across devices.
Submitted by: PaperMCQs
28
Medium css fpsc

What is a database schema?

  • A Backup file
  • B Structure of a database
  • C Network device
  • D Programming language
Permalink
Correct Answer: Option B — Structure of a database
Explanation: A database schema defines tables, fields, relationships, and constraints.
Submitted by: PaperMCQs
29
Medium css fpsc

Which layer of OSI handles physical transmission of bits?

  • A Network
  • B Transport
  • C Physical
  • D Session
Permalink
Correct Answer: Option C — Physical
Explanation: The Physical Layer is responsible for transmitting raw bits over communication channels.
Submitted by: PaperMCQs
30
Medium fpsc nts

Which SQL command modifies existing records?

  • A INSERT
  • B DELETE
  • C UPDATE
  • D SELECT
Permalink
Correct Answer: Option C — UPDATE
Explanation: The UPDATE statement changes existing records in a database table according to specified conditions.
Submitted by: PaperMCQs
31
Medium css fpsc

Which programming language is primarily used for Android development?

  • A Swift
  • B Kotlin
  • C Ruby
  • D PHP
Permalink
Correct Answer: Option B — Kotlin
Explanation: Kotlin is Google's preferred language for Android app development because of its modern syntax and safety features.
Submitted by: PaperMCQs
32
Medium fpsc nts

What is the purpose of a checksum?

  • A Compress data
  • B Verify data integrity
  • C Increase speed
  • D Encrypt files
Permalink
Correct Answer: Option B — Verify data integrity
Explanation: A checksum helps detect accidental changes in data during storage or transmission by comparing calculated values before and after transfer.
Submitted by: PaperMCQs
33
Medium css fpsc

Which protocol is used to securely transfer files over SSH?

  • A FTP
  • B TFTP
  • C SFTP
  • D SMTP
Permalink
Correct Answer: Option C — SFTP
Explanation: SFTP operates over SSH and provides encrypted file transfer capabilities, making it more secure than traditional FTP for transmitting sensitive data.
Submitted by: PaperMCQs
34
Medium css fpsc

Which Excel chart is best for showing trends over time?

  • A Pie Chart
  • B Line Chart
  • C Scatter Plot
  • D Radar Chart
Permalink
Correct Answer: Option B — Line Chart
Explanation: Line charts effectively display trends and changes across time periods, making them useful for analysis.
Submitted by: PaperMCQs
35
Medium ppsc nts

What is Freeze Panes used for?

  • A Lock worksheet
  • B Keep rows or columns visible
  • C Protect workbook
  • D Hide formulas
Permalink
Correct Answer: Option B — Keep rows or columns visible
Explanation: Freeze Panes keeps selected rows or columns visible while scrolling through large worksheets.
Submitted by: PaperMCQs
36
Medium fpsc ppsc

Which Excel feature applies formatting based on rules?

  • A Themes
  • B Conditional Formatting
  • C AutoFilter
  • D Freeze Panes
Permalink
Correct Answer: Option B — Conditional Formatting
Explanation: Conditional Formatting automatically changes cell appearance when specified conditions are met.
Submitted by: PaperMCQs
37
Medium fpsc nts

Which Access key uniquely identifies each record?

  • A Foreign Key
  • B Primary Key
  • C Composite Key
  • D Candidate Key
Permalink
Correct Answer: Option B — Primary Key
Explanation: A primary key uniquely identifies each record and prevents duplicate entries in a table.
Submitted by: PaperMCQs
38
Medium css pms

What is a macro in MS Office?

  • A Database
  • B Automated task sequence
  • C Chart type
  • D Network protocol
Permalink
Correct Answer: Option B — Automated task sequence
Explanation: A macro automates repetitive tasks by storing commands and actions that can be replayed later.
Submitted by: PaperMCQs
39
Medium fpsc ppsc

What is Track Changes used for in Word?

  • A Database management
  • B Reviewing edits
  • C Creating charts
  • D Printing documents
Permalink
Correct Answer: Option B — Reviewing edits
Explanation: Track Changes records modifications made to a document so reviewers can accept or reject them later.
Submitted by: PaperMCQs
40
Medium fpsc ppsc

What is the purpose of Slide Master in PowerPoint?

  • A Print slides
  • B Control overall slide design
  • C Insert videos
  • D Check spelling
Permalink
Correct Answer: Option B — Control overall slide design
Explanation: Slide Master allows users to apply consistent formatting, layouts, and styles across an entire presentation.
Submitted by: PaperMCQs
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