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NEW QUESTION: 1
You are creating a Microsoft ASP.NET Web application that allows customers to transfer money between their bank accounts.
You write the following code segment. (Line numbers are included for reference only.)
01 using (SqlConnection cn = new SqlConnection())
02 {
03 cn.ConnectionString = strConnString;
04 cn.Open();
05 using (SqlTransaction tran = cn.BeginTransaction())
06 {
07 try
08 {
10 }
11 catch (Exception xcp)
12 {
13 lblMessage.Text = xcp.Message;
14 tran.Rollback();
15 }
16 }
17 }
You need to ensure that the transfer operation executes within a transaction.
Which code segment should you insert at line 09?
A. using (SqlCommand cmd = cn.CreateCommand())
{
cmd.Transaction = tran;
cmd.CommandText = "UPDATE Accounts SET Bal = Bal " + Xfer + " WHERE Acct = " + Acct1;
cmd.ExecuteNonQuery();
cmd.CommandText = "UPDATE Accounts SET Bal = Bal + " + Xfer + " WHERE Acct = " + Acct2;
cmd.ExecuteNonQuery();
}
tran.Commit();
B. using (SqlCommand cmd = cn.CreateCommand()) { cmd.CommandText = "UPDATE Accounts SET Bal = Bal " + Xfer + " WHERE Acct = " + Acct1; cmd.ExecuteNonQuery(); cmd.CommandText = "UPDATE Accounts SET Bal = Bal + " + Xfer + " WHERE Acct = " + Acct2; cmd.ExecuteNonQuery(); } tran.Commit();
C. using (SqlCommand cmd = cn.CreateCommand()) { cmd.CommandText = "UPDATE Accounts SET Bal = Bal " + Xfer + " WHERE Acct = " + Acct1; cmd.ExecuteNonQuery(); cmd.CommandText = "UPDATE Accounts SET Bal = Bal + " + Xfer + " WHERE Acct = " + Acct2; cmd.ExecuteNonQuery(); }
D. using (SqlCommand cmd = cn.CreateCommand() { cmd.Transaction = tran; cmd.CommandText = "UPDATE Accounts SET Bal = Bal " + Xfer + " WHERE Acct = " + Acct1; cmd.ExecuteNonQuery(); cmd.CommandText = "UPDATE Accounts SET Bal = Bal + " + Xfer + " WHERE Acct = " + Acct2; cmd.ExecuteNonQuery(); }
Answer: A
NEW QUESTION: 2
What dies checking STARTTLS field in the SMTP firm di?
A. it disables SMTP Server authentication.
B. it Enables TLS/SSL encryption.
C. it Enables SMTP Server authentication.
D. it triggers the Time to Live Sequence in secure sockets.
Answer: B
NEW QUESTION: 3
A server administrator notes that a legacy application often stops running due to a memory error. When
reviewing the debugging logs, they notice code being run calling an internal process to exploit the
machine. Which of the following attacks does this describe?
A. Zero-day
B. Buffer overflow
C. Malicious add-on
D. Cross site scripting
Answer: B
Explanation:
Section: Threats and Vulnerabilities
Explanation/Reference:
Explanation:
This question describes a buffer overflow attack.
A buffer overflow occurs when a program or process tries to store more data in a buffer (temporary data
storage area) than it was intended to hold. Since buffers are created to contain a finite amount of data, the
extra information - which has to go somewhere - can overflow into adjacent buffers, corrupting or
overwriting the valid data held in them. Although it may occur accidentally through programming error,
buffer overflow is an increasingly common type of security attack on data integrity. In buffer overflow
attacks, the extra data may contain codes designed to trigger specific actions, in effect sending new
instructions to the attacked computer that could, for example, damage the user's files, change data, or
disclose confidential information. Buffer overflow attacks are said to have arisen because the C
programming language supplied the framework, and poor programming practices supplied the
vulnerability.