Which two project situations favor a waterfall methodology? Choose 2 answers

Universal Containers has 80% code coverage. Despite the creation of a test plan for each sprint, the number of defects is large.
What two items should the architect recommend to reduce defects?
Choose 2 answers

Universal Containers have just acquired Planetary storage. Both companies use salesforce.com to manage their sales activities. The two companies have many customers in common and the company plans to merge the two sales organizations, but the products and sales processes between the two original companies will remain different and distinct. What factor should the company consider in merging the two Salesforce.com orgs into a single org?

All AppExchange products are subject to Salesforce security reviews.
What is the most common reason that the prospect AppExchange products fail the security review?

Which two statements are accurate about why Mock objects are needed when writing test classes?
Choose 2 answers