Interview Questions

We need to first login to the data base as: SQLPLUS followed by user_name/password. Then we need to execute the following query:

CREATE USER user_name IDENTIFIED BY abcd; in this query a user_name suggest the user that is created which has a password abcd which is required for login in database.

In the mesh topology, each computer is connected to the other with a separate physical link in a network. It is most reliable topology as the network does not get down in case one of the nodes is failed.

Time Estimation method for Testing Process:

Step 1 : count number of use cases (NUC) of system 

Step 2 : Set Avg. Time Test Cases(ATTC) as per test plan 

Step 3 : Estimate total number of test cases (NTC) 

Total number of test cases = Number of Use Cases X Avg. Test Cases per a use case 

Step 4 : Set Avg. Execution Time (AET) per a test case 

Step 5 : Calculate Total Execution Time (TET) 

TET = Total number of test cases * AET 

Step 6 : Calculate Test Case Creation Time (TCCT)

usually we will take 1.5 times of TET as TCCT

TCCT = 1.5 * TET

Step 7 : Time for Re-Test Case Execution (RTCE) this is for retesting

usually we take 0.5 times of TET

RTCE = 0.5 * TET

Step 8 : Set Report generation Time (RGT

usually we take 0.2 times of TET

RGT = 0.2 * TET

Step 9 : Set Test Environment Setup Time (TEST)

it also depends on test plan

Step 10 : Total Estimation time = TET + TCCT+ RTCE + RGT + TEST + some buffer.

The wait(), notify(), and notifyAll() methods are used to provide an efficient way for threads to wait for a shared resource. When a thread executes an object's wait() method, it enters the waiting state. It only enters the ready state after another thread invokes the object's notify() or notifyAll() methods..

BDC ----> Batch Data Communication 

Methods of BDC-----> Direct Input method, Batch Input Session method, Call transaction method.