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-Arithmetic Operators. C programming language provides all basic arithmetic operators: +, -, *, / and %
-Relational Operators. Relational operators are used when we have to make comparisons: >,<,<=,>=,=,!=
-increment and decrement to change the value of an operand these are ++,--
-Logical Operators-An expression containing logical operator returns either 0 or 1 depending upon whether expression results true or false. Logical operators are commonly used in decision making in C programming these are &&,||,!
-Bitwise Operators-During computation, mathematical operations like: addition, subtraction, addition and division are converted to bit-level which makes processing faster and saves power these are:&,|,<<,>>
limooh answered the question on March 7, 2018 at 13:35
- Explain the concept of files, records and fields(Solved)
Explain the concept of files, records and fields.
Date posted: February 24, 2018. Answers (1)
- What is built in function?(Solved)
What is built in function?
Date posted: February 24, 2018. Answers (1)
- A feasibility study attempts to establish whether a project is economically, financially,
technically and socially acceptable.
a) (i) Name two ways in which a new system...(Solved)
A feasibility study attempts to establish whether a project is economically, financially,
technically and socially acceptable.
a) (i) Name two ways in which a new system can realize direct savings.
(ii) Name two intangible benefits that can be realized by a new system.
(iii) Name two methods of carrying out an investment appraisal.
b) (i) List three factors to be considered in technical feasibility.
(ii) Mention two circumstances under which you would recommend the use of computer
bureaux instead of developing a new system.
c) (i) Name two factors to be considered in social feasibility study.
(ii) What is the role of the user during the feasibility study stage?
d) You have just completed a feasibility study and you are now in the process of writing a
feasibility study report. Briefly describe five main sections of your report
Date posted: February 15, 2018. Answers (1)
- Most systems fail due to lack of adequate documentation than any other single reason.
Discuss the categories of documentation that may be considered during systems...(Solved)
Most systems fail due to lack of adequate documentation than any other single reason.
Discuss the categories of documentation that may be considered during systems
development life cycle (SDLC)
Date posted: February 15, 2018. Answers (1)
- A system analyst in the development of computerized information systems is defined as an agent of change.Required: (a) Define the term 'agent of change‘ and describe...(Solved)
A system analyst in the development of computerized information systems is defined as an 'agent of change'.
Required:
a) Define the term =agent of change‘ and describe four roles of a system analyst in the
development of computerized information systems.
b) Outline five advantages of an external system analyst in the development of
computerized information systems.
Date posted: February 15, 2018. Answers (1)
- Outline five factors that determine an application suitability for an expert system approach.(Solved)
Outline five factors that determine an application suitability for an expert system approach.
Date posted: February 15, 2018. Answers (1)
- (a) Define the following terms in relation to systems: (i.) Symbiosis;(ii.) Synergy; (iii.) Redundancy;(iv.) Factoring; (b) What is meant by 'hard' and 'soft' properties of...(Solved)
a) Define the following terms in relation to
systems:
(i.) Symbiosis;
(ii.) Synergy;
(iii.) Redundancy;
(iv.) Factoring;
b) What is meant by 'hard' and 'soft' properties of system approach? Describe briefly two
features of each
Date posted: February 15, 2018. Answers (1)
- a) You are a consultant to a small business organization that is considering computerising
its entire operations. Explain the role of the following generic systems...(Solved)
a) You are a consultant to a small business organization that is considering computerising
its entire operations. Explain the role of the following generic systems in such an
organisation.
(i.) Word processing;
(ii.) Spreadsheets;
(iii.) Database management systems;
b) Discuss the cost factors that should be taken into consideration in the development,
installation and operation of computer systems.
c) Explain the technique of optical disks as a method of data storage. Give appropriate
examples.
Date posted: February 15, 2018. Answers (1)
- a) What is the distinction between system verification and validation? Illustrate your answer
with an example in each case.
b) One way of minimizing errors in...(Solved)
a) What is the distinction between system verification and validation? Illustrate your answer
with an example in each case.
b) One way of minimizing errors in input data is to use data coding.
(i.) State four characteristics of a good coding system.
(ii.) Describe four commonly used coding systems.
c) System performance reviews may vary in content from one organization to another but
should cover certain key areas. Describe four key areas systems performance reviews should
cover
Date posted: February 15, 2018. Answers (1)
- Creating a plan for a new computer system is an extremely difficult task as evidenced by the
large number of project failures described in the...(Solved)
Creating a plan for a new computer system is an extremely difficult task as evidenced by the
large number of project failures described in the literature.
Focusing only on the following two key tasks, describe the major features to be considered
by a project manager before embarking on a project: -
a. Project estimation
b. Planning techniques.
Date posted: February 15, 2018. Answers (1)
- Businesses and organizations, whether computerised or not, make extensive use of
management reporting systems.
a. Describe some general characteristics of management reporting systems.
b. A supermarket with...(Solved)
Businesses and organizations, whether computerised or not, make extensive use of
management reporting systems.
a. Describe some general characteristics of management reporting systems.
b. A supermarket with some 10,000 stock items must know very quickly when a stock item
requires re-ordering. Describe in detail the type of report that should be used, giving details
of how the report format should be set up based on an example for a single item, and how
the report will be used by purchasing management
Date posted: February 15, 2018. Answers (1)
- Strategic benefits for an organization may be obtained by the use of a wide range of text and
image telecommunication based applications.
a. Identify and describe...(Solved)
Strategic benefits for an organization may be obtained by the use of a wide range of text and
image telecommunication based applications.
a. Identify and describe how telecommunication applications can reduce costs and/or help
an organisation differentiate products and services.
b. Describe the factors that
must be considered when developing a telecommunications
plan.
Date posted: February 15, 2018. Answers (1)
- In the conduct of duties, a professional information analyst/programmer might become
involved in an ethical conflict with an instruction from his/her organisation. An approach to...(Solved)
In the conduct of duties, a professional information analyst/programmer might become
involved in an ethical conflict with an instruction from his/her organisation. An approach to
this problem suggests that there are four main tasks that should be very carefully considered
by the professional person before any action is taken:
a. Collect and examine all the facts of the case;
b. Ensure that all internal organisational processes have been utilised;
c. Carefully consider your own situation;
d. Carefully consider possible final choices and outcomes.
Using the above headings, outline possible tasks and decisions that should be carried out or
taken.
Date posted: February 15, 2018. Answers (1)
- Executive Support Systems (ESS) are information systems at the strategic level of an
organization designed to address the problem of unstructured decision-making through the
use...(Solved)
Executive Support Systems (ESS) are information systems at the strategic level of an
organization designed to address the problem of unstructured decision-making through the
use of advanced graphics and communications.
a. List four types of technological change that have allowed more effective ESS to be
developed, indicating how each of these changes contributed to solving the earlier
problems of the ESS?
b. In what ways is building executive support systems different from building traditional MIS
systems?
c. What are the benefits of ESS? How do they enhance managerial decision making?
Date posted: February 15, 2018. Answers (1)
- To support users of modern networked computer systems, organizations have set up
variously named functions such as Help-desks, Information Centres, or Support Centres.
a. Describe the...(Solved)
To support users of modern networked computer systems, organizations have set up
variously named functions such as Help-desks, Information Centres, or Support Centres.
a. Describe the major functions of these user support areas.
b. User training and updating is of major importance. Describe what training options are
currently available for desktop computer users.
Date posted: February 15, 2018. Answers (1)
- Information systems are the lifeblood of any organization: -
a. Describe what is meant by a FORMAL computer-based information system;
b. In parallel with the formal information...(Solved)
Information systems are the lifeblood of any organization: -
a. Describe what is meant by a FORMAL computer-based information system;
b. In parallel with the formal information system, runs an INFORMAL information system.
Describe what is meant by this informal information system;
c. Compare this informal information system with the formal system indicating any conflicts
that might arise;
d. During the design of a formal computer based information system, should the
designers of such a system take into consideration the informal information system, and
if so, why?
Date posted: February 15, 2018. Answers (1)
- In the context of computer-based transaction processing systems: -
a. Describe their purpose;
b. Describe two different examples of such systems in differing industries or services;
c. What...(Solved)
In the context of computer-based transaction processing systems: -
a. Describe their purpose;
b. Describe two different examples of such systems in differing industries or services;
c. What are the MAJOR security implications of such systems?
d. Describe which of the system development methodologies is most likely to be used,
giving reasons for your choice.
Date posted: February 15, 2018. Answers (1)
- ‘It is one thing to have ownership of your own computer systems but another to accept the
responsibilities of ownership such as data integrity, security...(Solved)
‘It is one thing to have ownership of your own computer systems but another to accept the
responsibilities of ownership such as data integrity, security and overall risk management ‘.
This statement was made by a member of the board of a leading company. Explain what the
statement means and indicate how the company can ensure that it‘s responsibilities of
ownership ‘are properly carried out
Date posted: February 15, 2018. Answers (1)
- A software house produces a software package for the insurance industry. Purchases of the
package have formed a very active user group which has lobbied...(Solved)
A software house produces a software package for the insurance industry. Purchases of the
package have formed a very active user group which has lobbied for a particular change to
be made to the software to improve the functionality and usability of the software.
Required:
(a) Briefly explain the following terms:
(i.) Corrective maintenance;
(ii.) Adaptive maintenance;
(iii.) Perfective maintenance.
(b) Briefly explain the meaning and purpose of a user group
The software house has an internal quality assurance process for implementing software
changes
Required:
Explain each of the following two stages of an internal quality assurance process:
(c) Unit testing.
(d) System testing.
Date posted: February 15, 2018. Answers (1)
- a. The assurance of quality is an important aspect within all information systems
departments. Explain the following two stages of an internal quality assurance process.
i....(Solved)
a. The assurance of quality is an important aspect within all information systems
departments. Explain the following two stages of an internal quality assurance process.
i. Unit testing
ii. Systems testing
b. Explain how using formal specification methods can contribute to improved quality
assurance.
Date posted: February 15, 2018. Answers (1)