Understand Coding Decoding | Aptitude Explorer with Worksheets - Class 5 PDF Download

Introduction

Reading is a fundamental skill crucial to the learning process, as it enables children to understand letter-sound relationships and pronounce written words correctly. Often, children may express their frustration and challenges with reading using phrases like "I hate reading." One essential aspect of reading is Coding-Decoding, which plays a vital role in helping children decipher most words. Coding-Decoding forms the basis for various reading abilities, including fluency, vocabulary, reading comprehension, phonics, and phonemic awareness.
Through Coding-Decoding, children gain an understanding of letter-sound relationships, which enables them to quickly recognize familiar words and decode unfamiliar ones. This skill is invaluable in fostering reading proficiency and successful word recognition.

What is Coding and Decoding?

• Coding is a process used to encrypt a word, a number in a particular code or pattern based on some set of rules. Hence Coding is the process of sending data from one person to another person in such a way that only the sender and receiver can understand the meaning without letting anyone else know the meaning of it. 
• Decoding is a process to decrypt the pattern into its original form from the given codes.
• Coding-Decoding is a system of signals to transmit the information in the form of signals or code without it being known to a  third party.

• Coding decoding concepts can work in our real life. 
• For example, if you notice that your kid can learn their letter sounds in kindergarten it means what sound to make when the letter is written on the board. The kid progresses to identify the constant vowel words, which helps to read loudly such as cat, dog, sun.

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Types of Coding and Decoding

Letter Coding

Letter coding-decoding in which the letter of words is replaced by certain other letters according to specific patterns/rules to form a code.
Example for Letter coding-decoding.
Detect the coding pattern /rule and answer the question below:
If BROWN is written as ‘ZPMUL’, then VIOLET is coded as     
(a) SGMJCQ
(b) TGMJCR
(c) TGMJCQ
(d) TGWCQ

Ans: (b)
Explanation: In this question, the alphabet is replaced with another alphabet with some directions. The first letter B is coded as Z means that it moves backward with 1 letter similarly R is coded as P, O is coded as M, W is coded as U, and N is coded as L. So VIOLET is coded as TGMJCR.

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Number/Symbol Coding

Number coding-decoding in which either the numerical code values are assigned to a word or alphabetical code letters are assigned to the numbers.
Example for Number/Symbol coding-decoding:
If CHAIR is written as ‘12345’, RENT is written as ‘5678’, and then REAR is written as.
(a) 5635
(b) 5356
(c) 5365
(d) 5653

Ans: (a)
Explanation: 
In this question each alphabet is coded as a number. So that CHAIR is coded as 12345 and RENT is coded as 5678 and the REAR is coded as 5635.

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Substitution coding

Substitution coding-decoding in which some particular words are assigned with certain substituted names.
Example for Substitution coding-decoding.
If a dog is called “cat”, cat is called “lion”, lion is called “rat”, then which of these lives in a forest?
(a) Rat
(b) Lion
(c) Dog
(d) Cat

Ans: (a)
Explanation: In this question, lion lives in the forest but lion is called a rat so rat lives in a forest is the answer.