A user is frustrated that an app continuously crashes after receiving a recent update. What is the first step the user should try?  

A client systems administrator for Mac computers wants to ensure users’ data is backed up locally. What should the administrator enable?  

What is the pH of a buffer composed of 0.35 M H2PO4–(aq) and 0.65 M HPO42–(aq)? (Ka of H2PO4– is 6.2 x 10–8) a. 6.94 b. 7.21 c. 7.48 d. 7.73 e. 8.06

A security administrator revisits the security of client machines and wants to push out configuration changes to users. What is the best way to do this?  

A server administrator sets up static network configurations for servers since they do not want the IP address to change. The administrator sets up the IP address on a 24-bit subnet. What should the administrator set the subnet mask to?    

A server administrator wants to keep up with security patches and points their machines to pull updates. What should the administrator point towards?  

A network administrator is looking for an alternative network operating system (NOS) but also does not want a steep learning curve. Which of the following optimizes for NOS functionality?  

A user finds that their home computer fails to boot. The user believes part of the operating system (OS) is corrupted. They want to recover it but do not want to lose any personal documents. What should the user do?  

An acid-base equilibrium system is created by dissolving 0.50 mol CH3CO2H in water to a volume of 1.0 L. What is the effect of adding 0.50 mol CH3CO2–(aq) to this solution?   1. The pH of the solution will equal 7.00 because equal concentrations of a weak acid and its conjugate base are present.   2. Some CH3CO2H(aq) will ionize, increasing the concentration of CH3CO2–(aq) and increasing the pH.   3. Some CH3CO2–(aq) will react with H3O+, increasing the concentration of CH3CO2H(aq) and reestablishing the solution equilibrium. a. 1 only b. 2 only c. 3 only d. 1 and 3 e. 1, 2, and 3

A server administrator performs a statistical analysis on server operations to provide optimized resources. For example, the administrator wants to see resource performance graphs and key statistics, such as threads started by a process or hard page faults/second. What is the best tool to use?