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11th Standard Computer Science - Composition and Decomposition Two Marks Questions

Published on: 26/09/2019

Composition and Decomposition

Download Tamil Nadu 11th Standard Computer Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

Questions + Answers key

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Std: 11th Standard - Computer Science

chapter: - Model Question paper

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Questions:

Generic 2

10 x 2 = 20

Define a Function.

What is meant by Decomposition?

What are the 3 important control flow statements?

What is a Flow-chart?

What is a Pseudocode?

How do we refine a statement?

Why is function an abstraction?

What is the difference between an algorithm and a program?

Both conditional statement and iterative statement have a condition and a statement. How do they differ?

10.

Draw a flowchart for conditional statement.

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Answers Key:

Generic 2

10 x 2 = 20

Function is a sub-algorithm.

It is nothing but breaking down problem into smaller and more manageable problems.

Sequential, Alternative, Iterative.

It is a diagrammatic representation of algorithms.

Pseudo code is a notation similar to programming languages.

In refinement, each statement is repeatedly expanded into more detailed statements in the subsequent levels.

Once a function is defined, it can be used over and over and over again. Reusability of a single function several times is known as an abstraction.

Algorithm	Program
Algorithm is for human readers to understand.	Program is for the computers to execute directly.
Knowledge of English is needed.	Knowledge of programming language is required.
Easy to understand.	It is difficult to understand.

Conditional Statement	Iterative Statement
Statements are executed only once when the condition is true.	Iterative statement repeatedly evaluates a condition and executes a statement until it becomes false.
If condition statement.	While condition statement.