(a)   What is the difference between looping and selection?            (2 marks)

    (b)   Name the stage of program development cycle when:            (3 marks)

      (i)   A user guide would be written.

A programmer dry-runs the code.

System charts would be drawn.



(c) Study the pseudo-code below and answer the questions that follow.

The pseudo code is as follows

BEGIN

Print "enter the value of M and N";

Read M,N

Set χ = M;

Set y = N;

P = y - χ;

Q = χ - y;

IF P >Q THEN;

Set P = χ;

Set Q = y;

ELSE

Set P = y;

Set Q = χ;

ENDIF

PRINT P, Q, χ, y;

END

(i)   State the name of the control structure shown in the flowchart.   (1 mark)

Assuming the user keys in 8 and 14 when prompted to enter the values for m and N respectively, determine the printed values of P, Q, χ and y.         (4 marks)

(iii)   Draw a flowchart for the above pseudo-code.            (5 marks)

(a) Describe three standard coding scheme used in computing and electronic systems.                                 (3mks)

(b) Convert the decimal number 0.562510 into its binary equivalent.      (3mks)

(c) Convert the binary number 110.101 to its Decimal equivalent.      (3mks)

(d) Using twos Complement, perform the following binary arithmetic leaving the answer in binary notation.                        (3mks)

1001012 - 11012

__

(e) Other than the ring topology, describe other three types of topologies.   (3mks)

pur-new-sol

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