Understanding and Applying Data Processing in KCSE/KICD Computer Studies
7.0.0 DATA PROCESSING (24 LESSONS)
7.1.0 Specific Objectives
By the end of the topic, the learners should be able to:
a) Define the terms data, information, and data processing.
b) Describe the data processing cycle.
c) Explain the various methods of data processing.
d) Explain the types of errors in data processing.
e) Describe data integrity.
f) Describe a computer file.
g) Describe types of computer files.
h) Describe file organization methods.
i) Describe the various data processing modes.
7.2.0 Content
7.2.1 Definition of the terms data, information, and data processing.
7.2.2 Data processing cycle
- Data collection
- Stages of data collection.
- Methods of data collection.
- Data input
- Processing
- Output
7.2.3 Description of errors in data processing
- Transcription errors
- Transposition
7.2.4 Data Integrity
- Accuracy
- Timeliness
- Relevance
7.2.5 Data processing methods
- Manual/conventional
- Mechanical
- Electronic
7.2.6 Computer files
- Elements of a computer file
- Logical and physical files
7.2.7 Types of computer processing files
- Master
- Transaction
- Report
- Sort
- Backup
- Reference
7.2.8 File organization methods
- Sequential
- Random/direct
- Serial
- Indexed sequential
7.2.9 Electronic Data processing modes
- On-line
- Distributed
- Time-sharing
- Batch processing
- Multi-processing
- Multi-programming/multi-tasking
- Interactive processing
- Real-time
