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CSS MCQs

Civil Superior Services — Complete MCQ Bank

1,939 Questions
Exam Preparation Guide

How to prepare for CSS

CSS is Pakistan’s premier federal competitive examination. Strong preparation requires conceptual clarity, broad general knowledge and consistent practice across compulsory and optional areas.

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751
Computer Science Medium Uploaded: 09 Aug 2026

Which of the following is a valid IP address version widely used today alongside IPv6?

  • AIPv2
  • BIPv4
  • CIPv5
  • DIPv3
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Computer Science Medium Uploaded: 09 Aug 2026

What is the main function of an assembler?

  • AConvert assembly language to machine code
  • BStore data permanently
  • CRun applications
  • DManage files
753
Computer Science Medium Uploaded: 09 Aug 2026

Which of these is a type of computer virus?

  • AFirewall
  • BTrojan Horse
  • CAntivirus
  • DRouter
754
Computer Science Medium Uploaded: 09 Aug 2026

Which device is used to convert digital signals to analog and vice versa?

  • ARouter
  • BSwitch
  • CModem
  • DHub
755
Computer Science Easy Uploaded: 09 Aug 2026

Who is known as the father of computers?

  • AJohn von Neumann
  • BCharles Babbage
  • CBill Gates
  • DAlan Turing
756
Chemistry Medium Uploaded: 07 Aug 2026

What is the SI unit of amount of substance?

  • AMole
  • BLitre
  • CGram
  • DKilogram
757
Chemistry Medium Uploaded: 07 Aug 2026

Which law states that matter can neither be created nor destroyed?

  • ALaw of Conservation of Mass
  • BLaw of Multiple Proportions
  • CAvogadro's Law
  • DLaw of Definite Proportions
758
Chemistry Hard Uploaded: 07 Aug 2026

Which quantum number describes the shape of an orbital?

  • AAzimuthal quantum number
  • BMagnetic quantum number
  • CSpin quantum number
  • DPrincipal quantum number
759
Chemistry Hard Uploaded: 07 Aug 2026

Which scientist proposed the modern periodic law?

  • AAntoine Lavoisier
  • BJohn Dalton
  • CDmitri Mendeleev
  • DHenry Moseley
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Chemistry Medium Uploaded: 07 Aug 2026

What is the formula for calculating molarity?

  • AMoles/Volume in litres
  • BMass/Volume
  • CMoles/Mass
  • DVolume/Moles