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Question
E-mail message authenticity and confidentiality is BEST
achieved by signing the message using the:

A. sender's private key and encrypting the message using the
receiver's public key.

B. sender's public key and encrypting the message using the
receiver's private key.

C. the receiver's private key and encrypting the message
using the sender's public key.

D. the receiver's public key and encrypting the message
using the sender's private key.
 Question Submitted By :: Guest
I also faced this Question!!     Rank Answer Posted By  
 
  Re: E-mail message authenticity and confidentiality is BEST achieved by signing the message using the: A. sender's private key and encrypting the message using the receiver's public key. B. sender's public key and encrypting the message using the receiver's private key. C. the receiver's private key and encrypting the message using the sender's public key. D. the receiver's public key and encrypting the message using the sender's private key.
Answer
# 1
Answer: A

By signing the message with the sender's private key, the
receiver can verify its authenticity using the sender's
public key. By encrypting the message with the receiver's
public key, only the receiver can decrypt the message using
his/her own private key. The receiver's private key is
confidential, and therefore unknown to the sender. Messages
encrypted using the sender's private key can be read by
anyone (with the sender's public key).
 
Is This Answer Correct ?    1 Yes 0 No
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Other CISA Certification Interview Questions
 
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Involvement of senior management is MOST important in the development of: A. strategic plans. B. IS policies. C. IS procedures. D. standards and guidelines.  1
The BEST time to perform a control self-assessment involving line management, line staff and the audit department is at the time of: A. compliance testing. B. the preliminary survey. C. substantive testing. D. the preparation of the audit report.  1
Which of the following is a feature of an intrusion detection system (IDS)? A. Gathering evidence on attack attempts B. Identifying weakness in the policy definition C. Blocking access to particular sites on the Internet D. Preventing certain users from accessing specific servers  1
At the end of the testing phase of software development, an IS auditor observes that an intermittent software error has not been corrected. No action has been taken to resolve the error. The IS auditor should: A. report the error as a finding and leave further exploration to the auditee's discretion. B. attempt to resolve the error. C. recommend that problem resolution be escalated. D. ignore the error, as it is not possible to get objective evidence for the software error.  1
Connection-oriented protocols in the TCP/IP suite are implemented in the: A. transport layer. B. application layer. C. physical layer. D. network layer.  1
During an audit of an enterprise that is dedicated to e-commerce, the IS manager states that digital signatures are used in the establishment of its commercial relations. To substantiate this, the IS auditor must prove that which of the following is used? A. A biometric, digitalized and encrypted parameter with the customer's public key B. A hash of the data that is transmitted and encrypted with the customer's private key C. A hash of the data that is transmitted and encrypted with the customer's public key D. The customer's scanned signature, encrypted with the customer's public key  1
An audit charter should: A. be dynamic and change often to coincide with the changing nature of technology and the audit profession. B. clearly state audit objectives for the delegation of authority for the maintenance and review of internal controls. C. document the audit procedures designed to achieve the planned audit objectives. D. outline the overall authority, scope and responsibilities of the audit function.  1
Which of the following controls would be MOST effective in ensuring that production source code and object code are synchronized? A. Release-to-release source and object comparison reports B. Library control software restricting changes to source code C. Restricted access to source code and object code D. Date and time-stamp reviews of source and object code  2
A team conducting a risk analysis is having difficulty projecting the financial losses that could result from a risk. To evaluate the potential losses the team should: A. compute the amortization of the related assets. B. calculate a return on investment (ROI). C. apply a qualitative approach. D. spend the time needed to define exactly the loss amount.  1
Corrective action has been taken by an auditee immediately after the identification of a reportable finding. The auditor should: A. include the finding in the final report because the IS auditor is responsible for an accurate report of all findings. B. not include the finding in the final report because the audit report should include only unresolved findings. C. not include the finding in the final report because corrective action can be verified by the IS auditor during the audit. D. include the finding in the closing meeting for discussion purposes only.  2
The purpose for requiring source code escrow in a contractual agreement is to: A. ensure the source code is available if the vendor ceases to exist. B. permit customization of the software to meet specified business requirements. C. review the source code for adequacy of controls. D. ensure the vendor has complied with legal requirements.  1
To identify the value of inventory that has been kept for more than eight weeks, an IS auditor would MOST likely use: A. test data. B. statistical sampling. C. an integrated test facility. D. generalized audit software.  1
Data flow diagrams are used by IS auditors to: A. order data hierarchically. B. highlight high-level data definitions. C. graphically summarize data paths and storage. D. portray step-by-step details of data generation.  1
Which of the following is a control over component communication failure/errors? A. Restricting operator access and maintaining audit trails B. Monitoring and reviewing system engineering activity C. Providing network redundancy D. Establishing physical barriers to the data transmitted over the network  1
IS auditors, in performing detailed network assessments and access control reviews should FIRST: A. determine the points of entry. B. evaluate users access authorization. C. assess users identification and authorization. D. evaluate the domain-controlling server configuration.  2
Which of the following hardware devices relieves the central computer from performing network control, format conversion and message handling tasks? A. Spool B. Cluster controller C. Protocol converter D. Front end processor  1
Which of the following is a disadvantage of image processing? A. Verifies signatures B. Improves service C. Relatively inexpensive to use D. Reduces deterioration due to handling  1
The primary purpose of an audit charter is to: A. document the audit process used by the enterprise. B. formally document the audit department's plan of action. C. document a code of professional conduct for the auditor. D. describe the authority and responsibilities of the audit department.  1
During an audit of a telecommunications system the IS auditor finds that the risk of intercepting data transmitted to and from remote sites is very high. The MOST effective control for reducing this exposure is: A. encryption. B. callback modems. C. message authentication. D. dedicated leased lines.  2
Which of the following database administrator (DBA) activities is unlikely to be recorded on detective control logs? A. Deletion of a record B. Change of a password C. Disclosure of a password D. Changes to access rights  1
 
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