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(3a)

software that handles the storage, retrieval, and updating of data in a computer system.

3aii)

MySQL

Microsoft Access

3aiii)

A file is a collection of records which have common properties. Each file has its own file reference which is unique. The file reference indicates the subject or contexts of the records.

While

A record can be an image, text based or in electronic or physical format.

3bi) Normalization is a process of organizing the data in database to avoid data redundancy, insertion anomaly , update anomaly & deletion anomaly

3Bii)

*Insertion Anomalies:Insertion anomalies occur when we

try to insert data into a flawed table.

*Deletion Anomalies:- Deletion anomalies occur when we

delete data from a flawed schema.

*Update Anomalies:- Update anomalies occur when we

change data in a flawed schema.

3c.

Pick tool

Shape tool

Zoom tool

Freehand tool

4b) log files - A log file is a recording of everything that goes in and out of a particular server

Firewall- A firewall is a system designed to prevent unauthorized access to or from a private network.

Encryption -  Encryption is the conversion of electronic data into another form, called ciphertext, which cannot be easily understood by anyone except authorized parties.

Backup- backup refers to the copying and archiving of computer data so it may be used to restore the original after a data loss event.

4ci)

Primary key uniquely identify a record in the table.  While, 

Foreign key is a field in the table that is primary key in another table.

Primary Key can't accept null values. While, 

Foreign key can accept multiple null value.

4cii) Vision problems

Headache 

Obesity 

5a) 

i)Transmission is the act of transferring something from one spot to another, like a radio or TV broadcast, or a disease going from one person to another.

ii)Tasks can be completed faster because computers work at amazing speed.

Computers can process large amounts of data and generate error-free results, provided that the data is entered correctly.

4b) log files - A log file is a recording of everything that goes in and out of a particular server

Firewall- A firewall is a system designed to prevent unauthorized access to or from a private network.

Encryption -  Encryption is the conversion of electronic data into another form, called ciphertext, which cannot be easily understood by anyone except authorized parties.

Backup- backup refers to the copying and archiving of computer data so it may be used to restore the original after a data loss event.

4ci)

Primary key uniquely identify a record in the table.  While, 

Foreign key is a field in the table that is primary key in another table.

Primary Key can't accept null values. While, 

Foreign key can accept multiple null value.

4cii) Vision problems

Headache 

Obesity 

5a) 

i)Transmission is the act of transferring something from one spot to another, like a radio or TV broadcast, or a disease going from one person to another.

ii)Tasks can be completed faster because computers work at amazing speed.

Computers can process large amounts of data and generate error-free results, provided that the data is entered correctly.