Question

1.What standard methods can you use when handling file-reading and file-writing operations?

a. Java

b. Fragment-based methods

c. onClick

d. DDMS

2. What would this query return? SELECT * FROM Items WHERE OrderDate >= Date('Now')

a. All items in the database.

b. Nothing

c. Items that were ordered yesterday

d. Items that were ordered today.

3. What can you use to manage files within a desired directory and create subdirectories?

a. Subdirectory objects

b. Directory class

c. File objects

d. Context class

4. What class can you use to access external storage on the device?

a. The Fragment class

b. The Environment class

c. The External class

d. The Log class

Answer 1

1. The correct answer is a. Java can be used when handling file reading and file writing operations.Fragment based methods are used in the drug analysis. Onclick events are used in javascript and HTML to change the appearance of the text .DDMS is a tool used in Androids as a monitoring tool.it has now deprecated.
2. 2.The correct option is b. Nothing as it will give syntax error. May be if you are using any other version of sql or my sql the results can differ. Now() attribute shows the time and date right at the time of execution.no option states about the time
3. 3. The correct option is b . Directory class contains static methods for creating, moving, and enumerating through directories and subdirectories. This class cannot be inherited.File objects is an object that holds methods that affect a particular file or directory. It works as an interface between a program and the functions of the operating system that do the actual file manipulation.The context class is a most important class while working with EF 6 or EF Core. It can perform crud operations ie create,read, update and delete operations.

4.The correct option is b. For external storage "Environment.getExternalStoragePublicDirectory" this parameter is used in Android system for external storage.