For the&nbsp;ISC 2026 Computer Science&nbsp;examination, Part I of the Theory Paper is a&nbsp;compulsory 20-mark section&nbsp;designed to test fundamental knowledge, application, and higher-order thinking skills across the entire syllabus.

Test Series Structure (20 Marks)

This section typically features a mix of standard Multiple Choice Questions (MCQs), assertion-reason questions, and objective-type fill-in-the-blanks.

<ul data-complete="true" data-processed="true" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="mPWODf" jsuid="PmqMPe_m">
	<li data-complete="true" data-hveid="CAEIBRAA" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_n">Format: 20 objective questions (1 mark each).</li>
	<li data-complete="true" data-hveid="CAEIBRAB" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_q">Time Allocation: Approximately 5 minutes</li>
	<li data-complete="true" data-hveid="CAEIBRAC" data-processed="true" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_t">Focus: Testing &quot;Remember, Understand, Apply, and Analyse&quot; cognitive domains.</li>
</ul>

Most Expected MCQ Topics for 2026

Based on the latest specimen patterns and&nbsp;<a data-hveid="CAEIBhAB" data-processed="true" href="https://www.collegedekho.com/articles/isc-class-12-computer-science-weightage-2026-brd/" ping="/url?sa=t&amp;source=web&amp;rct=j&amp;url=https://www.collegedekho.com/articles/isc-class-12-computer-science-weightage-2026-brd/&amp;ved=2ahUKEwjGnMyYj6-TAxXba2wGHezLAhoQy_kOegYIAQgGEAE&amp;opi=89978449" rel="noopener" target="_blank">ISC 2026 Weightage</a>, focus on these core areas:

<ul data-complete="true" data-processed="true" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="mPWODf" jsuid="PmqMPe_26">
	<li data-complete="true" data-hveid="CAEICBAA" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_27">Boolean Algebra &amp; Logic Gates:

	<ul data-complete="true" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="mPWODf" jsuid="PmqMPe_2a">
		<li data-complete="true" data-hveid="CAEICBAB" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2b">Simplification using Boolean laws (e.g., De Morgan&rsquo;s, Duality).</li>
		<li data-complete="true" data-hveid="CAEICBAC" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2d">Identifying Minterms and Maxterms from truth tables.</li>
		<li data-complete="true" data-hveid="CAEICBAD" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2f">Universal gates (NAND/NOR) and Half/Full Adder logic.</li>
	</ul>
	</li>
	<li data-complete="true" data-hveid="CAEICBAE" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2h">Object-Oriented Programming (OOP) Concepts:
	<ul data-complete="true" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="mPWODf" jsuid="PmqMPe_2k">
		<li data-complete="true" data-hveid="CAEICBAF" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2l">Static vs. Non-static members and their access rules.</li>
		<li data-complete="true" data-hveid="CAEICBAG" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2n">Constructor properties (implicit return types, signatures).</li>
		<li data-complete="true" data-hveid="CAEICBAH" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2p">Access specifiers (public, protected, private).</li>
		<li data-complete="true" data-hveid="CAEICBAI" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2r">Inheritance and Polymorphism (keywords like&nbsp;<code data-complete="true" data-sae="" data-sfc-cb="" data-sfc-root="c" dir="ltr" jsaction="" jscontroller="PR9Qj" jsuid="PmqMPe_2t">super</code>&nbsp;and&nbsp;<code data-complete="true" data-sae="" data-sfc-cb="" data-sfc-root="c" dir="ltr" jsaction="" jscontroller="PR9Qj" jsuid="PmqMPe_2u">this</code>).</li>
	</ul>
	</li>
	<li data-complete="true" data-hveid="CAEICBAJ" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2v">Data Structures &amp; Complexity:
	<ul data-complete="true" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="mPWODf" jsuid="PmqMPe_2y">
		<li data-complete="true" data-hveid="CAEICBAK" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_2z">Big O Notation: Identifying time complexity for common algorithms.</li>
		<li data-complete="true" data-hveid="CAEICBAL" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_32">Stacks/Queues: Principle of operations (LIFO/FIFO).</li>
		<li data-complete="true" data-hveid="CAEICBAM" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_35">Infix/Postfix: Conversion of expressions.</li>
		<li data-complete="true" data-hveid="CAEICBAN" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_38">Binary Trees: Identifying traversal orders (In-order, Pre-order, Post-order).</li>
	</ul>
	</li>
	<li data-complete="true" data-hveid="CAEICBAO" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_3b">Java Fundamentals:
	<ul data-complete="true" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="mPWODf" jsuid="PmqMPe_3e">
		<li data-complete="true" data-hveid="CAEICBAP" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_3f">Wrapper classes and Type Casting (e.g., String to Double).</li>
		<li data-complete="true" data-hveid="CAEICBAQ" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_3h">Array address calculations (Row Major vs. Column Major).</li>
		<li data-complete="true" data-hveid="CAEICBAR" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_3j">Exception Handling (identifying&nbsp;<code data-complete="true" data-sae="" data-sfc-cb="" data-sfc-root="c" dir="ltr" jsaction="" jscontroller="PR9Qj" jsuid="PmqMPe_3l">InputMismatchException</code>&nbsp;or&nbsp;<code data-complete="true" data-sae="" data-sfc-cb="" data-sfc-root="c" dir="ltr" jsaction="" jscontroller="PR9Qj" jsuid="PmqMPe_3m">NullPointerException</code>).</li>
	</ul>
	</li>
</ul>

Sample Question Types

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	<li data-complete="true" data-hveid="CAEICRAA" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_3q">Assertion-Reason: &quot;Assertion: Inheritance promotes reusability. Reason: A subclass acquires properties of a superclass.&quot;</li>
	<li data-complete="true" data-hveid="CAEICRAB" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_3t">Output-Based: Predicting the return value of a recursive method or a specific string manipulation function.</li>
	<li data-complete="true" data-hveid="CAEICRAC" data-sae="" data-sfc-cb="" data-sfc-root="c" jsaction="" jscontroller="vsuOFb" jsuid="PmqMPe_3w">Critical Thinking: Choosing the correct statement to instantiate an object based on a provided class constructor.</li>
</ol>

Actionable Tip: Download the latest&nbsp;<a data-hveid="CAEIChAB" data-processed="true" href="https://cisce.org/wp-content/uploads/2025/11/Time-Table-ISC-2026.pdf" ping="/url?sa=t&amp;source=web&amp;rct=j&amp;url=https://cisce.org/wp-content/uploads/2025/11/Time-Table-ISC-2026.pdf&amp;ved=2ahUKEwjGnMyYj6-TAxXba2wGHezLAhoQy_kOegYIAQgKEAE&amp;opi=89978449" rel="noopener" target="_blank">ISC Specimen Paper 2026</a>&nbsp;from the official&nbsp;CISCE website&nbsp;to practice the exact marking scheme and question style.

Would you like a&nbsp;practice set of 20 MCQs&nbsp;based specifically on these&nbsp;2026 expected topics?

ISC Computer 2026 ( MCQ test-series)