Course Content
Instructions
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What does the examiner want from you?
03:21
Paper 2 – Problem Solving Approach -Practical
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Lesson 1: Follow The Two Track Method
02:09
Lesson 2: Healthy Practices You Should Maintain in the Course
01:09
Program Development Life Cycle (PDLC)
02:51
Computer systes, sub-systems and decomposition
03:56
Decomposing a problem
02:52
Methods used to design and construct a solution to a problem
02:39
Explaining The purpose of an Algorithm
02:34
Real Life Programming
02:23
How To Write perfect pseudocode
03:40
A Talk between Customer and ShopKeeper
02:30
Fetching Requirements Out of the Talk
04:15
Practice Session 1
00:21
Stage 1 : Setting & Declaration
02:32
Practice Session : Variables and Constants
00:21
Different Types of DATATYPES
02:19
Practice Session : DataTypes
00:21
Stage 2 : INPUT
03:03
Stage 3 : Process
02:13
Process : Arithmetic Opreators
01:24
Process: Relational Operators
02:57
Process: Logical Operators
04:12
Practice Session : Logical Operators
00:21
Concept of Totaling
03:20
Sample Question 1
03:40
Sample Question 2
Dealing With Constructs
03:31
Sequence Construct : Reading
Sequence Construct : Further Reading
Selection Construct
Selection: IF…THEN…ENDIF(OneWay)
02:02
Sample question : IF THEN ENDIF (ONE WAY)
Selection : Question Set-1 : IF THEN ENDIF
00:21
Selection: Pseudocode Example
02:21
Selection: Question Set 2 : Practice Session
00:21
Selection: IF….THEN…..ELSE….ENDIF(TwoWay) Nesting
02:10
Selection: Question Set -2 : IF THEN ENDIF
00:21
Selection: IF….THEN….ELSEIF….ENDIF(MultipleWays)
03:27
Selection: Practice Session 1 (multiple ways)
Practice sessiion: More Questions
00:21
CASEOF……OTHERWISE……ENDCASE
04:19
Iteration Construct: Real Life Loops
03:54
For Loop (Pre counted-Turns)
04:41
For loop Using step command (pseudocode)
02:54
Sample Question : for loop in Pseudocode
02:52
While Loop (Pre counted Loop-Turns)
02:58
Repeat….until (post controlled Loop) – working
02:28
Sample Question: Repeat Until
01:54
Question SET 1 – For Loop
00:21
Question SET 2 – For loop
00:21
Set3-while loop Questions
00:21
Concept of Validation
05:27
RANGE CHECK
04:22
LENGTH CHECK
04:30
FORMAT CHECK
03:38
PRESENCE CHECK
02:55
CHECK DIGIT
04:28
Question Set1- Validation
00:21
Question Set2-Validation
00:21
Flowchart Symbols
03:01
Making First Flowchart -working
Flow chart: Selection
02:54
Flowchart: Loops
02:31
Practice Question : Flow Chart
00:21
Concept of 1D Array: Arrays in Real Life
02:55
Writing Pseudocode For 1D Array
03:34
Array Question
Practice Session 1
00:21
Practice Session 2
00:21
More Questions
00:21
What is Linear search in 1D Array ? – The Concept
02:36
Sample Question of linear search
00:21
Answer of Question
More Questions
00:21
Practice Questions:Linear Search
00:21
Bubble Sort : The concept
04:36
Sample Question: bubble sort
00:21
Question Set 1 : bubble sort
00:21
2D Array : The Concept
05:57
Question Set 1 : 2D Array
00:21
Combination of 1D array & 2D Array
03:23
Knowing Procedures: The Concept
02:42
Knowing Procedures: Reading
00:21
Procedure : More Example – Reading
00:21
Knowing Functions
03:30
Functions : Examples
00:21
Question set 1: Procedure
00:21
Question Set 2 : Function
00:21
Type of Errors – done
04:41
Corrections to Errors – Questions
File handling : The concept
05:20
Filehandling : WRITE
02:08
Filehandling : READ
02:15
Filehandling : APPEND
02:51
Filehandling : Using Array
02:38
Logic Gates: Type of Logic Gates
03:19
Logic Gates: NOT GATE
03:09
Logic Gates: OR GATE, NOR GATE
Logic Gates: AND GATE, NAND GATE
Logic Gates: XOR GATE
Logic Gates: Combing all together
Logic Gates: Writing Simple Equation
Logic Gates: Writing Boolean Equation
Databases
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Single Table Databases – done
00:00
Past Paper-2 May/June 2025
Paper 1 – Theory
0/20
Preface: What the Examiner Expects from You
03:24
Chp 1: Number System
02:51
Chp 1: Text,Sound and Images -done
06:31
Chp 1: Data storage and file compression
Chp 2: Types and methods of data Transmission
04:25
Chp 2: Methods of error detection
Chp 2: Symmetric and asymmetric encryption
06:49
Chp 3: Computer architecture
Chp 3: Input and Output devices
Chp 3: Data Storage
02:53
Chp 3: Network hardware
04:00
Chp 4: Types of software and interrupts – working
Chp 4: Types of programming language, translators and integrated development environments(IDEs)
Chp 5: The internet and the World Wide Web (WWW)
Chp 5: Digital currency
Chp 5: Cyber security
Chp 6: Automated systems
Chp 6: Robotics
Chp 6: Artificial intelligence (AI)
Practice Session 1
00:42
Past Paper-1 May/June 2025
Download Files
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Olevel : Computer Science 2210 / IGCSE 0478 : Recorded
Validation is a crucial process in data management and software development that ensures data is accurate, consistent, and useful. It involves checking data against predefined rules or constraints to confirm it meets the required standards before processing or storage. The primary goal of validation is to prevent errors and maintain data integrity.

There are several types of validation:

  1. Format Check: Ensures data is in the correct format. For example, email addresses must include an “@” symbol and a domain suffix like “.com”.

  2. Range Check: Confirms that a value falls within a specified range. For example, age fields might be restricted to values between 0 and 120.

  3. Presence Check: Ensures that required fields are not left blank. For instance, a registration form may mandate entering both a username and password.

  4. Length Check: Verifies that data contains the correct number of characters. For example, passwords might need to be between 8 and 16 characters long.

  5. Type Check: Confirms that the data is of the expected type, such as ensuring that a field expecting an integer does not receive a string.

By implementing these various types of validation, systems can ensure data quality, which in turn supports reliable and efficient operation of applications and databases. Validation helps in catching errors early, reducing the cost and effort associated with fixing data-related issues later in the process.

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