Name and explain the function of the keyboard keys represented by the following symbols

​(a) Name and explain the function  of the  keyboard keys represented  by the  following symbols (2mks)

• ​​(i) Tab Key Used to remove text/ cursor to the right by a fixed or present number of spaces

• (ii) Enter / carriage Return key Used to initiate command on the screen i.e.  Pressed after each command.

• ​(iii) Shift Key Used to change letter case. ​Also used in conjunction with other keys for various  Commands.

(b) Simulation is one of the application areas of computers

(i) What is meant by the term simulation (1mk)

• A simulation program is designed to predict the likely behaviour of a real life system. The real – life situation is represented as a mathematical model in the computer program.

(ii) Name two application areas of simulation

• Training of pilots (2mks)
• Weather forecasting

(iii) State three advantages of computer based simulation (3mks)

• Simulators are less expensive to operate than actual airplanes
• Pilot training  is not affected by weather conditions
• Training in emergency situations can be safely given
• Different  conditions  such as night  flying can be simulated
• Practice can be given  in take- off and landing at airports  worldwide

​(c) Explain three ways in which computers have impacted on Education (3mks)

• Teaching has been made easier through modeling packages. Modeling is when a computer program attempts to represent a real situation. In order to do this, mathematical equations are used. Different values can be input to the model to investigate possible outcomes.
• Simulations packages can be used to train students
• Multimedia packages offer a wealth of resources material, which students can transfer across into their project work
• It is easier to maintain school/ students records using computers

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