- *2019 WAEC COMPUTER STUDIES ANSWERS*
- +++++++++++++++++++
- 1a. Firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
- 1ii.
- a) Run defragmentation
- b) Run anti-spyware
- 1bi. Feasibility Study: The purpose of this first phase is to find out the scope of the problem and determine solutions. Resources, cost, time, benefits and other items should be considered here.
- 1bii System Design: This third phase describes, in details, the necessary specifications, features and operations that will satisfy the functional requirements of the proposed system which will be in place
- 1biii. Maintenance: The last phase is when end users can fine-tune the system, if they wish, to boost performance, add new capabilities or meet additional user requirements.
- =======
- (3ai)
- A storage device is any computing hardware that is used for storing, porting and extracting data files and objects. It can hold and store information both temporarily and permanently, and can be internal or external to a computer, server or any similar computing device.
- (3aii)
- Virtual memory is a memory management capability of an operating system (OS) that uses hardware and software to allow a computer to compensate for physical memory shortages by temporarily transferring data from random access memory (RAM) to disk storage.
- (3bi)
- For 2kb
- 1 byte = 8 bits.
- 1 Kilobyte = 8 x 10³ Bits.
- 1 Kilobyte = 8 x 1000 Bits.
- 1 KB = 8000 bits.
- .:. 2kb = 8000 x 2 = 16,000bits
- For 2mb
- 1mb = 1000kb
- .:. 2mb = 2000kb
- Where 1kb = 8000 bits,
- Then to find 2000kb in bits
- = 8000 x 2000
- =16,000,000 bits
- (3bii)
- The total storage of the two devices in bits = 16,000 + 16,000,000
- = 16,016,000 bits
- .:. Changing to bytes
- = 8 bits = 1 byte
- .:. 16,016,000 bits = ?
- = 2,002,000 bytes
- =======
- 4.bii
- Characteristics of Computer
- SPEED : In general, no human being can compete to solving the complex computation, faster than computer.
- ACCURACY : Since Computer is programmed, so what ever input we give it gives result with accuratly.
- STORAGE : Computer can store mass storage of data with appropriate formate.
- DILIGENCE : Computer can work for hours without any break and creating error.
- VERSATILITY : We can use computer to perform completely different type of work at the same time.
- POWER OF REMEMBERING : It can remember data for us.
- NO IQ : Computer does not work without
- ======
- 5a)
- encryption is the process of encoding a message or information in such a way that only authorized parties can access it and those who are not authorized cannot. Encryption does not itself prevent interference, but denies the intelligible content to a would-be interceptor.
- 1aii)Always run all necessary latest updates & service packs.
- ii) By installing anti-virus on the computer system
- iii) proper cleaning and positioning should be done after using the computer system
- (1b)
- (i)feasibility study- this extent to which the required software performs a series of steps to solve business problems and user requirements. This feasibility is dependent on human resources (software development team) and involves visualizing whether the software will operate after it is developed and be operative once it is installed.
- (ii) Design – The prerequisite for this phase is the requirement specification document. In this phase, the system and software design are prepared based on the given requirements. The system design helps in specifying hardware and software requirements and overall defines the system architecture.
- (iii) Maintenance –Problems arises once the customers start using the product. These problems need to be fixed from time to time. This is what is covered in the maintenance phase. The service engineers oblige the customers by solving the issue.
- ====================
- (3ai)
- A storage device is any computing hardware that is used for storing, porting and extracting data files and objects. It can hold and store information both temporarily and permanently, and can be internal or external to a computer, server or any similar computing device.
- (3aii)
- Virtual memory is a memory management capability of an operating system (OS) that uses hardware and software to allow a computer to compensate for physical memory shortages by temporarily transferring data from random access memory (RAM) to disk storage.
- (3bi)
- For 2kb
- 1 byte = 8 bits.
- 1 Kilobyte = 8 x 10³ Bits.
- 1 Kilobyte = 8 x 1000 Bits.
- 1 KB = 8000 bits.
- .:. 2kb = 8000 x 2 = 16,000bits
- For 2mb
- 1mb = 1000kb
- .:. 2mb = 2000kb
- Where 1kb = 8000 bits,
- Then to find 2000kb in bits
- = 8000 x 2000
- =16,000,000 bits
- (3bii)
- The total storage of the two devices in bits = 16,000 + 16,000,000
- = 16,016,000 bits
- .:. Changing to bytes
- = 8 bits = 1 byte
- .:. 16,016,000 bits = ?
- = 2,002,000 bytes
- =================
- 4.bii
- Characteristics of Computer
- SPEED : In general, no human being can compete to solving the complex computation, faster than computer.
- ACCURACY : Since Computer is programmed, so what ever input we give it gives result with accuratly.
- STORAGE : Computer can store mass storage of data with appropriate formate.
- DILIGENCE : Computer can work for hours without any break and creating error.
- VERSATILITY : We can use computer to perform completely different type of work at the same time.
- POWER OF REMEMBERING : It can remember data for us.
- NO IQ : Computer does not work without
- *
- Computer solutions
- From 1 to 5
- CONTACT us for you verified and legit QUESTIONS AND ANSWERS
- (1a)
- A firewall is software used to maintain the security of a private network. Firewalls block unauthorized access to or from.
- (1aii)
- (1)Obstacle to the alleged intruder through physical and software means.
- (2)Management or influence on the elements of a system.
- (1aiii)
- 1aii.
- 1) By installing anti-virus on the computer system
- 2) proper cleaning and positioning should be done after using the computer system
- *1b*
- i) The feasibility study is basically the test of the proposed system in the light of its workability, meeting user's requirements, effective use of resources and of course, the cost effectiveness. These are categorized as technical, operational, economic, schedule and social feasibility.
- ii) The design phase comes after a good understanding of customer’s requirements, this phase defines the elements of a system, the components, the security level, modules, architecture and the different interfaces and type of data that goes through the system.
- =============!========
- *spartan exam ministry*
- (2ci)
- *File*
- A file is an object on a computer that stores data, information, settings, or commands used with a computer program
- (2cii)
- *Record*
- In computer, a record (also called a structure, struct, or compound data) is a database entry that may contain one or more values.
- ==============
- *3a*
- i) A storage device is any computing hardware that is used for storing, porting and extracting data files and objects. It can hold and store information both temporarily and permanently, and can be internal or external to a computer, server or any similar computing device.
- __
- ii) A virtual memory is a memory that appears to exist as main storage although most of it is supported by data held in secondary storage, transfer between the two being made automatically as required.
- 4ii)
- Portability
- Readability
- Efficiency
- 4.bii
- Characteristics of Computer
- SPEED : In general, no human being can compete to solving the complex computation, faster than computer.
- ACCURACY : Since Computer is programmed, so what ever input we give it gives result with accuratly.
- STORAGE : Computer can store mass storage of data with appropriate formate.
- DILIGENCE : Computer can work for hours without any break and creating error.
- VERSATILITY : We can use computer to perform completely different type of work at the same time.
- POWER OF REMEMBERING : It can remember data for us.
- NO IQ : Computer does not work without
- 5a)
- encryption is the process of encoding a message or information in such a way that only authorized parties can access it and those who are not authorized cannot. Encryption does not itself prevent interference, but denies the intelligible content to a would-be interceptor.
- (3ai)
- A storage device is any computing hardware that is used for storing, porting and extracting data files and objects. It can hold and store information both temporarily and permanently, and can be internal or external to a computer, server or any similar computing device.
- (3aii)
- Virtual memory is a memory management capability of an operating system (OS) that uses hardware and software to allow a computer to compensate for physical memory shortages by temporarily transferring data from random access memory (RAM) to disk storage.
- (3bi)
- For 2kb
- 1 byte = 8 bits.
- 1 Kilobyte = 8 x 10³ Bits.
- 1 Kilobyte = 8 x 1000 Bits.
- 1 KB = 8000 bits.
- .:. 2kb = 8000 x 2 = 16,000bits
- For 2mb
- 1mb = 1000kb
- .:. 2mb = 2000kb
- Where 1kb = 8000 bits,
- Then to find 2000kb in bits
- = 8000 x 2000
- =16,000,000 bits
- (3bii)
- The total storage of the two devices in bits = 16,000 + 16,000,000
- = 16,016,000 bits
- .:. Changing to bytes
- = 8 bits = 1 byte
- .:. 16,016,000 bits = ?
- = 2,002,000 bytes