programming questions

timer Asked: Apr 28th, 2015

Question description

  • b.Imagine an operation is specified as follows:

    context: Customer::compareDetails(otherName : String, otherAddressDetails : AddressDetails)


    -- otherName and otherAddressDetails are not null


    -- if the name of this object matches otherName and the addressDetails of this object matches otherAddressDetails

    -- return true

    -- otherwise return false

  • c.If an increment of code has passed unit tests, why might it still need to be tested again?

  • d.The following Java code represents an implementation of the operation specified in part b.

    public boolean compareDetails(String name, String[] addressDetails) {

    if (!

    return false;

    if (this.addressDetails.length != addressDetails.length)

    return false;

    for (int i = 0; i < this.addressDetails.length ; i++)

    if (!this.addressDetails[i].equals(addressDetails[i]))

    return false;

    return true;


    • i.Write down an executable assertion that could be used to verify the precondition of the method.

    • ii.If an executable assertion that verifies a precondition fails at runtime, where should we look for the source of the problem and why?

  • e.Explain what is meant by executable documentation and identify two forms of it.

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