[Lead2pass New] SY0-401 Exam Questions Free Download From Lead2pass (501-525)

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In recent years, many people choose to take CompTIA SY0-401 certification exam which can make you get the CompTIA certificate and that is the passport to get a better job and get promotions. How to prepare for CompTIA SY0-401 exam and get the certificate? Please refer to CompTIA SY0-401 exam questions and answers on Lead2pass.

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QUESTION 501
Which of the following is a common coding error in which boundary checking is not performed?

A.    Input validation
B.    Fuzzing
C.    Secure coding
D.    Cross-site scripting

Answer: A
Explanation:
Input validation is a defensive technique intended to mitigate against possible user input attacks, such as buffer overflows and fuzzing. Input validation checks every user input submitted to the application before processing that input. The check could be a length, a character type, a language type, or a domain.

QUESTION 502
One of the most consistently reported software security vulnerabilities that leads to major exploits
is:

A.    Lack of malware detection.
B.    Attack surface decrease.
C.    Inadequate network hardening.
D.    Poor input validation.

Answer: D
Explanation:
D: With coding there are standards that should be observed. Of these standards the most fundamental is input validation. Attacks such as SQL injection depend on unfiltered input being sent through a web application. This makes for a software vulnerability that can be exploited. There are two primary ways to do input validation: client-side validation and server-side validation. Thus with poor input validation you increase your risk with regard to exposure to major software exploits.

QUESTION 503
Without validating user input, an application becomes vulnerable to all of the following EXCEPT:

A.    Buffer overflow.
B.    Command injection.
C.    Spear phishing.
D.    SQL injection.

Answer: C
Explanation:
Input validation is a defensive technique intended to mitigate against possible user input attacks, such as buffer overflows and fuzzing. Input validation checks every user input submitted to the application before processing that input. The check could be a length, a character type, a language type, or a domain.

QUESTION 504
Which of the following can BEST help prevent cross-site scripting attacks and buffer overflows on a production system?

A.    Input validation
B.    Network intrusion detection system
C.    Anomaly-based HIDS
D.    Peer review

QUESTION 505
The BEST methods for a web developer to prevent the website application code from being vulnerable to cross-site request forgery (XSRF) are to: (Select TWO).

A.    Permit redirection to Internet-facing web URLs.
B.    Ensure all HTML tags are enclosed in angle brackets, e.g., “<” and “>”.
C.    Validate and filter input on the server side and client side.
D.    Use a web proxy to pass website requests between the user and the application.
E.    Restrict and sanitize use of special characters in input and URLs.

Answer: CE
Explanation:
XSRF or cross-site request forgery applies to web applications and is an attack that exploits the web application’s trust of a user who known or is supposed to have been authenticated.
This is often accomplished without the user’s knowledge.
XSRF can be prevented by adding a randomization string (called a nonce) to each URL request and session establishment and checking the client HTTP request header referrer for spoofing.

QUESTION 506
After visiting a website, a user receives an email thanking them for a purchase which they did not request. Upon investigation the security administrator sees the following source code in a pop-up window:

Which of the following has MOST likely occurred?

A.    SQL injection
B.    Cookie stealing
C.    XSRF
D.    XSS

Answer: C
Explanation:
XSRF or cross-site request forgery applies to web applications and is an attack that exploits the web application’s trust of a user who known or is supposed to have been authenticated. This is often accomplished without the user’s knowledge.

QUESTION 507
Which of the following is the BEST way to prevent Cross-Site Request Forgery (XSRF) attacks?

A.    Check the referrer field in the HTTP header
B.    Disable Flash content
C.    Use only cookies for authentication
D.    Use only HTTPS URLs

Answer: A
Explanation:
XSRF or cross-site request forgery applies to web applications and is an attack that exploits the web application’s trust of a user who known or is supposed to have been authenticated. This is accomplished by changing values in the HTTP header and even in the user’s cookie to falsify access. It can be prevented by embedding additional authentication data into requests that allows the web application to detect requests from unauthorized locations. Examples are synchronizer token patterns, cookie-to-header tokens, and checking the HTTP Referrer header and the HTTP Origin header.

QUESTION 508
The process of making certain that an entity (operating system, application, etc.) is as secure as it can be is known as:

A.    Stabilizing
B.    Reinforcing
C.    Hardening
D.    Toughening

Answer: C
Explanation:
Hardening is the process of securing a system by reducing its surface of vulnerability. Reducing the surface of vulnerability typically includes removing unnecessary functions and features, removing unnecessary usernames or logins and disabling unnecessary services.

QUESTION 509
Vendors typically ship software applications with security settings disabled by default to ensure a wide range of interoperability with other applications and devices.
A security administrator should perform which of the following before deploying new software?

A.    Application white listing
B.    Network penetration testing
C.    Application hardening
D.    Input fuzzing testing

QUESTION 510
Which of the following describes the process of removing unnecessary accounts and services from an application to reduce risk exposure?

A.    Error and exception handling
B.    Application hardening
C.    Application patch management
D.    Cross-site script prevention

Answer: B
Explanation:
Hardening is the process of securing a system by reducing its surface of vulnerability. Reducing the surface of vulnerability typically includes removing unnecessary functions and features, removing unnecessary usernames or logins and disabling unnecessary services.

QUESTION 511
A network administrator is responsible for securing applications against external attacks.
Every month, the underlying operating system is updated. There is no process in place for other software updates.
Which of the following processes could MOST effectively mitigate these risks?

A.    Application hardening
B.    Application change management
C.    Application patch management
D.    Application firewall review

Answer: C
Explanation:
The question states that operating system updates are applied but not other software updates. The `other software’ in this case would be applications. Software updates includes functionality updates and more importantly security updates. The process of applying software updates or `patches’ to applications is known as `application patch management’. Application patch management is an effective way of mitigating security risks associated with software applications.

QUESTION 512
A recently installed application update caused a vital application to crash during the middle of the workday. The application remained down until a previous version could be reinstalled on the server, and this resulted in a significant loss of data and revenue.

Which of the following could BEST prevent this issue from occurring again?

A.    Application configuration baselines
B.    Application hardening
C.    Application access controls
D.    Application patch management

Answer: D
Explanation:
Patch management is the process of maintaining the latest source code for applications and operating systems by applying the latest vendor updates. This helps protect a systems from newly discovered attacks and vulnerabilities. A part of patch management is testing the effects of vendor updates on a test system first to ensure that the updates do not have detrimental effects on the system, and, should the updates have no detrimental effects on the test systems, backing up the production systems before applying the updates on a production system.

QUESTION 513
An administrator finds that non-production servers are being frequently compromised, production servers are rebooting at unplanned times and kernel versions are several releases behind the version with all current security fixes.
Which of the following should the administrator implement?

A.    Snapshots
B.    Sandboxing
C.    Patch management
D.    Intrusion detection system

Answer: C
Explanation:
Patch management is the process of maintaining the latest source code for applications and operating systems by applying the latest vendor updates. This helps protect a systems from newly discovered attacks and vulnerabilities.

QUESTION 514
Which of the following is the term for a fix for a known software problem?

A.    Skiff
B.    Patch
C.    Slipstream
D.    Upgrade

Answer: B
Explanation:
Patch management is the process of maintaining the latest source code for applications and operating systems by applying the latest vendor updates. This helps protect a systems from newly discovered attacks and vulnerabilities.

QUESTION 515
Which of the following practices is used to mitigate a known security vulnerability?

A.    Application fuzzing
B.    Patch management
C.    Password cracking
D.    Auditing security logs

QUESTION 516
Which of the following can a security administrator implement on mobile devices that will help prevent unwanted people from viewing the data if the device is left unattended?

A.    Screen lock
B.    Voice encryption
C.    GPS tracking
D.    Device encryption

Answer: A
Explanation:
Screen-lock is a security feature that requires the user to enter a PIN or a password after a short period of inactivity before they can access the system again. This feature ensures that if your device is left unattended or is lost or stolen, it will be difficult for anyone else to access your data or applications.

QUESTION 517
Which of the following can be used on a smartphone to BEST protect against sensitive data loss if the device is stolen? (Select TWO).

A.    Tethering
B.    Screen lock PIN
C.    Remote wipe
D.    Email password
E.    GPS tracking
F.    Device encryption

Answer: CF
Explanation:
C: Remote wipe is the process of deleting data on a device in the event that the device is stolen. This is performed over remote connections such as the mobile phone service or the internet connection and helps ensure that sensitive data is not accessed by unauthorized people.
F: Device encryption encrypts the data on the device. This feature ensures that the data on the device cannot be accessed in a useable form should the device be stolen.

QUESTION 518
Which of the following controls can be implemented together to prevent data loss in the event of theft of a mobile device storing sensitive information? (Select TWO).

A.    Full device encryption
B.    Screen locks
C.    GPS
D.    Asset tracking
E.    Inventory control

Answer: AB
Explanation:
A: Device encryption encrypts the data on the device. This feature ensures that the data on the device cannot be accessed in a useable form should the device be stolen.
B: Screen locks are a security feature that requires the user to enter a PIN or a password after a short period of inactivity before they can access the system again. This feature ensures that if your device is left unattended or is lost or stolen, it will be difficult for anyone else to access your data or applications.

QUESTION 519
A way to assure data at-rest is secure even in the event of loss or theft is to use:

A.    Full device encryption.
B.    Special permissions on the file system.
C.    Trusted Platform Module integration.
D.    Access Control Lists.

Answer: A
Explanation:
Device encryption encrypts the data on the device. This feature ensures that the data on the device cannot be accessed in a useable form should the device be stolen.

QUESTION 520
Which of the following should Matt, a security administrator, include when encrypting smartphones? (Select TWO).

A.    Steganography images
B.    Internal memory
C.    Master boot records
D.    Removable memory cards
E.    Public keys

Answer: BD
Explanation:
All useable data on the device should be encrypted. This data can be located on the hard drive, or removable drives, such as USB devices and memory cards, and on internal memory.

QUESTION 521
A bank has recently deployed mobile tablets to all loan officers for use at customer sites. Which of the following would BEST prevent the disclosure of customer data in the event that a tablet is lost or stolen?

A.    Application control
B.    Remote wiping
C.    GPS
D.    Screen-locks

Answer: B
Explanation:
Remote wipe is the process of deleting data on a device in the event that the device is stolen. This is performed over remote connections such as the mobile phone service or the internet connection and helps ensure that sensitive data is not accessed by unauthorized people.

QUESTION 522
A small company has recently purchased cell phones for managers to use while working outside if the office.
The company does not currently have a budget for mobile device management and is primarily concerned with deterring leaks if sensitive information obtained by unauthorized access to unattended phones. Which of the following would provide the solution BEST meets the company’s requirements?

A.    Screen-lock
B.    Disable removable storage
C.    Full device encryption
D.    Remote wiping

Answer: A
Explanation:
Screen-lock is a security feature that requires the user to enter a password after a short period of inactivity before they can access the system again. This feature ensures that if your device is left unattended or is lost or stolen, it will be difficult for anyone else to access your data or applications.

QUESTION 523
Pete, the system administrator, has concerns regarding users losing their company provided smartphones. Pete’s focus is on equipment recovery. Which of the following BEST addresses his concerns?

A.    Enforce device passwords.
B.    Use remote sanitation.
C.    Enable GPS tracking.
D.    Encrypt stored data.

Answer: C
Explanation:
Global Positioning System (GPS) tracking can be used to identify its location of a stolen device and can allow authorities to recover the device. However, for GPS tracking to work, the device must have an Internet connection or a wireless phone service over which to send its location information.

QUESTION 524
After a security incident involving a physical asset, which of the following should be done at the beginning?

A.    Record every person who was in possession of assets, continuing post-incident.
B.    Create working images of data in the following order: hard drive then RAM.
C.    Back up storage devices so work can be performed on the devices immediately.
D.    Write a report detailing the incident and mitigation suggestions.

Answer: A
Explanation:
Asset tracking is the process of maintaining oversight over inventory, and ensuring that a device is still in the possession of the assigned authorized user.

QUESTION 525
The chief Risk officer is concerned about the new employee BYOD device policy and has requested the security department implement mobile security controls to protect corporate data in the event that a device is lost or stolen. The level of protection must not be compromised even if the communication SIM is removed from the device. Which of the following BEST meets the requirements? (Select TWO)

A.    Asset tracking
B.    Screen-locks
C.    GEO-Tracking
D.    Device encryption

Answer: AD
Explanation:
A: Asset tracking is the process of maintaining oversight over inventory, and ensuring that a device is still in the possession of the assigned authorized user.
D: Device encryption encrypts the data on the device. This feature ensures that the data on the device cannot be accessed in a useable form should the device be stolen.

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