Which statement is true about reference and object types?

a. the reference type corresponds to the instantiated class.
b. the object type corresponds to the type in the variable declaration.
c. the reference type determines which members are accessible.
d. the reference type determines which hidden members are accessible.

Write a loop that prints each country's population in country_pop. sample output for the given program with input 'china: 1365830000,india: 1247220000,united states: 318463000,indonesia: 252164800': united states has 318463000 people. india has 1247220000 people. indonesia has 252164800 people. china has 1365830000 people.

Write the command that can be used to answer the following questions. (hint: try each out on the system to check your results.) a. find all files on the system that have the word test" as part of their filename. b. search the path variable for the pathname to the awk command. c. find all files in the /usr directory and subdirectories that are larger than 50 kilobytes in size. d. find all files in the /usr directory and subdirectories that are less than 70 kilobytes in size. e. find all files in the / directory and subdirectories that are symbolic links. f. find all files in the /var directory and subdirectories that were accessed less than 60 minutes ago. g. find all files in the /var directory and subdirectories that were accessed less than six days ago. h. find all files in the /home directory and subdirectories that are empty. i. find all files in the /etc directory and subdirectories that are owned by the group bin."

If you want to delete an entire word at a time, which key should you press along with the backspace or delete key?