Interview Questions

BDC ----> Batch Data Communication 

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

- The better way to design the layout of the webpage is by using the <div> tag. 

- The <table> tag is used to present the data in tabular format

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.

new ClassName( arg1, arg2, .... argN);

Ex:

Class sample {

   Sample(int a) {

   System.out.println("arg con a =" +a);

   }

}

class Demo {

    Public static void main( String[] args) {

     Sample s1= new Sample(23);

     Sample s2= new Sample(45);

    }

}

Path contains path of .exe files(commands).

Classpath contains path of packages. packages can be stored in folder or .jar files

- Web servers can be infiltrated using the command shell by an attacker to read the HTML files that is getting transferred. 

- If the set-uid scripts are not proper and bad then the infiltration can happen by the attacker. 

- The processes are not given proper permissions so that the password can be changed by using the “passwd” command to change the password of the system.

- This also authenticates the user for accessing the system and the files on it containing the data. 

- The program that is used in the operating system doesn’t follow the principle of least privilege and lead to security issues.

Session storage is same like local storage but the data is valid for a session. In simple words the data is deleted as soon as you close the browser.

To create a session storage you need to use “sessionStorage.variablename” . In the below code we have a created a variable called as “clickcount”.

If you refresh the browser the count increases. But if you close the browser and start again the “clickcount” variable starts from zero.

if(sessionStorage.clickcount)

{

sessionStorage.clickcount=Number(sessionStorage.clickcount)+1;

}

else

{

sessionStorage.clickcount = 0;

} 

A table of data representing a database result set, which is usually generated by executing a statement that queries the database.

ResultSet object maintains a cursor pointing to its current row of data. Initially the cursor is positioned before the first row. The next method moves the cursor to the next row, and because it returns false when there are no more rows in the ResultSet object, it can be used in a while loop to iterate through the result set.