Cambridge IGCSE Computer Science Coursebook 1st Edition Sarah Lawrey, Donald Scott - Solutions

1 Joe owns a business which produces wooden furniture. He employs 20 workers in the Production department and three workers in the offices. Joe pays all his workers wages which are calculated by time rate, but he is thinking of changing to piece rate. He has a high labour turnover from the factory
Compare a nurse with a machine operator in a factory, What do you think makes their jobs satisfying? Copy out the table below and list your ideas for each. Nurse Machine operator
For the following jobs, say which methods of motivation would be most suitable and why. [Remember to consider whether it is easy to measure their output - this may affect how you decide to reward their efforts.)a Car production worker b Hotel receptionist c Teacher d Shop assistant e Managing
a From the following list of jobs, say what you could measure to find out how effectively the employees are working:• car production worker• police officer• shop assistant• soldier• waiter• baker.• teacher b Are there any jobs on the list for which output is difficult to measure? If
a Identify two stakeholders in Derek's new business. Explain why each stakeholder is interested in his business.b Consider the advantages and disadvantages to Derek of buying a franchise from a big clothes retail business instead of setting up his own clothes shop. Which option do you think he
1 a Explain four personal characteristics that Derek needs to be a successful entrepreneur.b Derek has to decide which type of business organisation to choose if he sets up his own business. Consider the advantages and disadvantages of the following types of business organisation. Recommend which
2 The Big Pit Mining business (BPM) owns and operates coal and gold mines in several different countries. It employs thousands of workers. Most of them work in very dangerous conditions for low pay. Waste from the mines is often dumped in local rivers. 'Making higher profits and raising returns to
1 Sunita and her partner Sunil decided to start a business selling flowers called S and S Blooms. They agreed on the business objectives they would set. There are several other flower shops in their town and there is much competition. Sunita and Sunil had very little cash to start their shop.
Coca-Cola's senior managers have set the objective of increasing returns to owners of the company - that is, its millions of shareholders. However, the managers believe that this can only be achieved if Coca-Cola meets three other objectives:Remain the world's largest soft drinks company by value
Here are brief details of four businesses:• A small firm of builders which has noticed new businesses being set up in the building industry.• A recently established business in the rapidly expanding computer industry, which is owned by two young and ambitious entrepreneurs.• A large book
2 Aurelie and Nadine set up the A and N Partnership ten years ago. It specialises in handmade shoes and boots. The business now employs around 20 people. Demand for these products is increasing rapidly. The partners need to invest much more capital in the business but they need to avoid a lot of
1 When Jameel lost his job in a fruit and vegetable shop that closed down, he decided to open his own store. He had good contacts with suppliers. They said they would give him one month's credit before he paid for supplies. Jameel had $5000 in savings to invest in the shop. He thought this would be
TD Power Systems was incorporated as a private limited company in India in 1999. It has slowly expanded its range of advanced electric generators. The company needed more capital to:pay back debt invest in a huge expansion of its factory in Dabaspet The private shareholders decided to sell at least
Read the case study.Walmart is the world's largest retail business. The company wanted to enter the Indian market. Walmart did not set up its own stores initially as it had little knowledge of the Indian market or Indian consumers. Walmart set up a joint venture with Bharti Enterprises, one of
How does the existence of limited liability benefit an individual shareholder?b Does limited liability make it easier or more difficult for companies to attract new shareholders? Explain your answer.c Explain why a sole trader might not want to convert their business into a partnership.d It is
Amin decided not to form a partnership with his uncle. Instead, five years after setting up his business, he is thinking of forming a private limited company. Amin would sell shares in this new company to friends and relatives but he wants to keep most shares himself. He is very busy repairing
Your friend, Amin, is an expert computer engineer. He currently works for a large computer manufacturer that operates in an expanding industry. He thinks that he could run his own successful business. He has no experience of running a business. He has very few savings to invest into a business.Amin
2 TelCom owns a phone network and provides phone network services to many consumers. The business does not manufacture phones and it does not own retail stores selling them. Senior managers at TelCom are considering a takeover of either a phone manufacturer or a chain of phone shops. TelCom employs
1 Sabrina was bored with her job in a clothing factory. Her main passion was fashion and she had always been good at selling since helping her father on his market stall. She encouraged her parents and some friends to invest in her idea for opening a shop selling good quality women's clothes.
Identify the form of business growth which is used in each of these situations.a A garage agrees to merge with another garage.b A bicycle retailer expands by buying a bicycle shop in another town.c A fruit juice business buys a fruit farm.d A business making electrical goods agrees to join with a
the problems linked to business growth and how they might be overcome?
why the owners of a business may want to expand the business?
the contents of a business plan and how plans assist entrepreneurs?
the key characteristics of successful entrepreneurs?
the benefits and drawbacks of being an entrepreneur?
2 The government of Country Y owns and controls many businesses. The public sector always produces goods and services more efficiently than privately owned businesses, a government minister recently said. Other ministers disagree and want to privatise many state-owned businesses. The private sector
1 Ade's Engineering Company (AEC) makes parts for cars and trucks. These are sold to car manufacturers in many countries. The parts include metal brake components and rubber seals to fit around windows. AEC operates in Country X, which, until a few years ago, had an economy dominated by agriculture
Find out whether, in your own country, the government owns and controls the following businesses:a. railway systemb. local bus servicesc. water supplyd. electricity supplye. and radio stationsf. hospitals.
2 Mohammed owns a bakery. He makes bread and cakes. He employs three workers who help him mix the dough for the bread and cakes, put the dough into tins, bake the bread and cakes, and serve customers. Mohammed has calculated that the 'added value' of his business is low. His customers complain when
1 Gowri plans to start up her own business using her savings. She wants to produce fashion clothes for women. She is a very good clothes designer but she does not like stitching clothes together. Two friends have offered to help Gowri. Abha is an experienced material or fabric cutter she can cut
Explain what a database is.
Describe two advantages of using an electronic database over a paper-based system.
Match the correct term with its definition: A structure in which data is stored in a database Field Query A unique identifier for a record A collection of data about one single item in a database Record One piece of data about an item in a database Table Primary Key A method used to search a
Explain why it is important to give the correct data type to a field.
Bosire has a simple flat file database. Its table has two fields: name and telephone number.a. Explain why neither field is suitable as a primary key. What field could be added to create a primary key?b. Why might a user choose to create a flat file database rather than a relational database?
A database stores data in a table called Cars. The table structure includes fields called Colour, Engine Size and Number of Doors. Write an SQL query-by-example which searches for red or blue cars, with 5 doors and an engine size of more than 1600cc.
Why can unreliable data be of concern to a database user?
Discuss how and why 3D printing may become a more common technology in the home.
Describe three ways in which RAM differs from ROM.
Explain the difference between primary storage and secondary storage.
Explain how a hard disk drive reads and writes data.
What enables a Blu-ray disk to hold more data than a compact disk?
A company sends out an electronic catalogue its customers. Suggest a suitable storage medium and justify your choice with reasons.
A 16-bit Colour image is 4 inches x 1 inch in size, with a resolution of 600 dots per inch. Calculate the storage requirements for this image.
Explain why data on a magnetic tape may be accessed quickly or slowly.
Explain two reasons why solid-state storage is not as common in desktop PCs and laptops as hard disk drives.
What is meant by data losing its value?
Explain what is meant by an automatic backup.
Explain how phishing and pharming trick a user into giving up personal data.
Explain how anti-virus software may help to prevent distributed denial of service attacks.
Explain why computer security is more effective when anti-virus software and firewalls are used.
Describe how a proxy server can help keep data safe.
Explain the difference between symmetric and asymmetric encryption.
Describe what a protocol is and how protocols help protect data.
Define the term 'computer ethics.
Explain why ethics are necessary when using computers.
If a company gave you a free version of their software and encouraged you to try and improve it and share it with the online community, what kind of software would this be?
Explain how malware can be distributed using electronic communications.
Explain why it might be unethical to use an image taken from the internet in a commercial website.
Explain the difference between a variable and a constant. Give an example of when you would use each.
A programmer would like to store the following data:a. The user's nameb. The user's agec. The user's genderd. The user's quiz score.Give the most suitable data type for each item of data they want to store.
A teacher wants to work out the average test score for a class. They want to count and total the number of marks they enter to calculate the average.a. Explain how they would do this.b. The teacher wants to enter marks till they have no more marks to enter.They do not currently know how many marks
Explain why sequence is important when creating a program.
State one reason why a programmer would use an array.
A teacher wants to create a program that will allow them to write exam scores for a class to an array. There are 15 students in the class. Write a suitable pseudocode solution that will allow the teacher to do this.
When creating an array, what are the two main things that we need to do?
Explain why comments should be used in pseudocode.
Explain why flowcharts are a useful design tool.
What symbol is used in a flowchart to represent a decision?
Design a pseudocode algorithm that will calculate the area and perimeter of a triangle. The user must choose which answer they want to be output.
Design a flowchart algorithm that makes sure a user only enters an integer in the range 1 to 10.
Design a flowchart algorithm for a simple drinks machine. The user can choose from tea, coffee, hot chocolate, orange juice and apple juice. if the user inputs a drink that is not listed an error message should be displayed.
Amy has been asked to design an algorithm for a very large program. which design tool, pseudocode or flowchart, do you think would be most suitable? Explain your answer.
Describe what is meant by a library routine and suggest reasons why using such a routine is of benefit to a programmer.
Seema wishes to design an algorithm using a flowchart. Discuss the possible benefits and drawbacks of using a flowchart to design her algorithm.
Consider this algorithm:Complete the following trace table using the input data 4, 3,10,1, 0,15: value 0 nextValue 0 INPUT value INPUT nextValue WHILE nextValuc!-0#!-means not IF nextValue > value# note indentation value = nextValue ENDIF INPUT nextValue ENDWHILE OUTPUT value
Explain the difference between a logic error and a syntax error.
Explain the difference between validation and verification.
Why is it important to use test data? Use examples in your answer.
Explain what is meant by the resolution of a display.
Vikram wants a new printer to take to university. He will be printing mainly essays and reports. State which type of printer would be most suitable and say why.
Explain why printers do not print in RGB.
Explain why LCD screens are more suited to portable devices than CRTs.
Explain what is meant by an output device.
Describe how a light sensor is used to read a barcode.
Describe how an infrared sensor works.
Explain how the use of moisture sensors can improve farming.
Explain two drawbacks of using motion sensors in a security system and suggest how they could be overcome.
Identify three different sensors that could be used to increase safety in a nuclear plant and describe how they would do this.
Define the term 'sensor'.
Explain how a 3D scanner works. Give an example in your answer.
Describe how a barcode works and what data they usually store.
Describe how an interactive whiteboard could be used to help train staff in a company.
Describe the fetch-execute cycle carried out in the von Neumann architecture.
Describe two benefits of using a digital camera over a film camera.
Explain why, when using a microphone, an analogue-to-digital converter is also needed when inputting data.
Explain how a touch screen device recognises that the screen is being touched.
Explain how a business could make use of QR codes.
Input devices can be either automatic or manual. Explain the difference between the two types. Give examples in your answer.
Explain what is meant by an input device.

Showing 900 - 1000 of 1029

Cambridge IGCSE Computer Science Coursebook 1st Edition Sarah Lawrey, Donald Scott - Solutions

Step by Step Answers