Sequence and selection

1. The following pseudocode tests how quickly a user can type a given sentence without making any mistakes. 

The statement time.clockTick() returns the number of seconds elapsed since the program started followed by the number of characters in the sentence typed. 

What type of variable is each of the following?

a) mistakeMade

1. The following pseudocode tests how quickly a user can type a given sentence without making any mistakes. 

The statement time.clockTick() returns the number of seconds elapsed since the program started followed by the number of characters in the sentence typed. 

What type of variable is each of the following?

b) n

1. The following pseudocode tests how quickly a user can type a given sentence without making any mistakes. 

The statement time.clockTick() returns the number of seconds elapsed since the program started followed by the number of characters in the sentence typed. 

What type of variable is each of the following?

c) totalTime

1. The following pseudocode tests how quickly a user can type a given sentence without making any mistakes. 

The statement time.clockTick() returns the number of seconds elapsed since the program started followed by the number of characters in the sentence typed. 

What type of variable is each of the following?

d) sentence

e) What does line 16 do?

f) Alter the program so that instead of storing the sentence “The quick brown fox jumped over the lazy dog”,  the user can enter the sentence on which they will be timed.

2. A customer entering security details when logging in to a bank website is asked to enter three random characters from their password, which must be at least 8 characters long and contain no spaces. Assume that in this case the password is HC&dt2016. 

The letters are then compared to those in the password held on file for that customer.  Kelly has a first attempt at writing pseudocode for the algorithm. 

(a) What value is assigned to numChars at line 2?

2. A customer entering security details when logging in to a bank website is asked to enter three random characters from their password, which must be at least 8 characters long and contain no spaces. Assume that in this case the password is HC&dt2016. 

The letters are then compared to those in the password held on file for that customer.  Kelly has a first attempt at writing pseudocode for the algorithm. 

(b) Complete the if statement at line 23.

2. A customer entering security details when logging in to a bank website is asked to enter three random characters from their password, which must be at least 8 characters long and contain no spaces. Assume that in this case the password is HC&dt2016. 

The letters are then compared to those in the password held on file for that customer.  Kelly has a first attempt at writing pseudocode for the algorithm. 

(c) What possible values may be assigned to index1 at line 3?

2. A customer entering security details when logging in to a bank website is asked to enter three random characters from their password, which must be at least 8 characters long and contain no spaces. Assume that in this case the password is HC&dt2016. 

The letters are then compared to those in the password held on file for that customer.  Kelly has a first attempt at writing pseudocode for the algorithm. 

(d) Describe two weaknesses of this algorithm.