What the board asks

We went through the ISC board papers, question by question, and matched each question to a topic. Here is what was asked, how often, and what was never asked.

Computer Science: 180 topics in the 2027 syllabus, across 10 units. The board has asked 117 of them at least once. 63 were never asked in the papers we checked.

Pick a unit

CS3 Objects and Classes

This unit carries about 6 marks in the paper. We split it into 11 topics: each is one thing an examiner can ask, and you can practise it on paper in 5 to 25 minutes. The board has asked 2 of them. 9 were never asked. Last asked: 2020.

2asked by the board at least once

9in the syllabus, never asked

2times a topic of this unit was asked

1.8hours for one attempt at every topic

What the papers ask most

  • The keyword new and where it is usedonce, last 2020
  • Constructor versus method; kinds of constructoronce, last 2017

In the syllabus, never asked (9)

They can still come, because they are in the syllabus. Give each one clean attempt. Your plan has two practice questions for each.

  • Write an algorithm, then the Java code, then test itProgram
  • Skeleton of a Section B class from its specificationProgram
  • Define object, class, instance, attributes and behaviourStatement
  • Output of code that creates objects and calls methodsDry run / output
  • Model a real-world thing as a classGive reason
  • Accept input with Scanner and print the outputProgram
  • Tokens, delimiters and whitespace in an input streamStatement
  • Split a sentence into words with StringTokenizerProgram
  • Output of StringTokenizer code (dry run)Dry run / output

All the topics in Computer Science: Objects and Classes →

The 10 topics Computer Science papers ask most

Counted on the board papers from 2018 to the 2027 specimen paper, which every unit has been checked against.

  1. 1.Principle of duality: state it and write the dualCS1 Boolean Algebra · asked 8 times since 2018
  2. 2.Complement of an expression using De Morgan's theoremCS1 Boolean Algebra · asked 8 times since 2018
  3. 3.Word problem to truth table and SOP or POSCS1 Boolean Algebra · asked 8 times since 2018
  4. 4.K-map reduction of a four-variable POS expressionCS1 Boolean Algebra · asked 8 times since 2018
  5. 5.Pre-order, in-order and post-order traversalCS9 Data Structures · asked 8 times since 2018
  6. 6.K-map reduction of a four-variable SOP expressionCS1 Boolean Algebra · asked 7 times since 2018
  7. 7.Read a tree: leaves, internal nodes, parent, siblings, degreeCS9 Data Structures · asked 7 times since 2018
  8. 8.Truth table to classify tautology, contradiction or contingencyCS1 Boolean Algebra · asked 6 times since 2018
  9. 9.Convert between cardinal and canonical formsCS1 Boolean Algebra · asked 6 times since 2018
  10. 10.Address of an element, row major and column majorCS6 Arrays and Strings · asked 6 times since 2018

See when each unit comes in your plan