I'm going to pass a salesforce dev401.I found some sample questions but some of them are confusing and I found different solutions for them so please help me.

1.Which is the first step when creating a report?
A. Select type of report
B. Select object on which report needs to be generated
C. Select columns to be displayed
D. Select report name
E. Select the Fields which need to be Summarized
2.An application was deigned without considering requirements for reports and dashboard. Which of the following statements is true?
A. The data model will support all the requirements of the application including reports and dashboards
B. Reports are part of the application and application design will take care of it.
C. No special considerations for reports or dashboard are required as salesforce can natively take care of the requirements
D. The data model and the application will not cater for reports and dashboards
3. Which of the following is not supported by Enhanced Page Layout editor. Select the one correct answer:
A. Change the field name
B. Add blank spaces
C. Make a field required or read-only
D. Add a new section
E. Add a new custom field
4. How many Dynamic Dashboards are allowed for an Organization:
A. 3
B.5
C. 7
D. 10
5. What happens to the Secondary Relationship when the Primary Relationship is deleted in the Junction Object?
A. Secondary Relationship becomes Primary Automatically
B. Secondary Relationship is made Primary manually
C. Nothing Happens
D. You can’t delete the primary relationship
6. How the formula will look like if you want to calculate the date/time difference b/w created date?
A. Today()– datevalue(created date)
B. Created date – Now()
C. Now()– created date
D. DateValue(created date)– today()
7. Using a formula field how would a developer calculate the number of days since a record has been created. The CreatedDate field is a DateTime type field.
A. Today()-DATEVALUE(CreatedDate)
B. Now()-DATEVALUE(CreatedDate)
C. Today()-CreatedDate
D. CreatedDate-TODAY()
8. A developer has created a junction object. What is the significance of the first master-detail (primary) relationship?
A. Look and feel, the junction object’s detail and edit pages use the color and any associated icon of the primary master object
B. You cannot delete the primary relationship
C. You cannot rename the primary relationship
D. There is no significance
9. A developer wants to leverage the console view to see the parent object of the child object in focus on the console. How would a developer specify what related list fields are displayed on the parent object?
A. On a child object’s mini-page layout
B. On a parent pbject’s mini-page layout related lists field selection
C. On the parent object’s page layout related lists field selection
D. You cannot modify the related fields on the console view