Engineering, 13.03.2020 03:32 ashleyd9243
Suppose we have a JDBC Connection object c to a database, and this database has a relation
R(name, address, phone)
Columns name and address are of string type, while phone is an integer.
The following objects are also declared:
Statement s = null;
String q = "SELECT address, phone FROM R" + "WHERE name = 'Bill Gates'".
ResultSet r null;
There are many methods that could be applied to the given variables. When a method is applied to r, assume that it holds the result of query q. Then, identify a correct use of a method from the list below.
a) String x = r. getInt (1);
b) r = c. executeQuery (g) ;
c) int p = r. getInt (2);
d) r = s. executeQuery ( );
Answers: 1
Engineering, 04.07.2019 16:10
An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)
Answers: 2
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
Engineering, 04.07.2019 18:20
Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms
Answers: 2
Engineering, 04.07.2019 19:10
An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling
Answers: 2
Suppose we have a JDBC Connection object c to a database, and this database has a relation
Spanish, 15.12.2020 22:50
English, 15.12.2020 22:50
World Languages, 15.12.2020 22:50
Spanish, 15.12.2020 22:50
Law, 15.12.2020 22:50
Mathematics, 15.12.2020 22:50
History, 15.12.2020 22:50
Health, 15.12.2020 22:50
Mathematics, 15.12.2020 22:50