Explanation
A staging environment is a replica of the production environment that is used to test and verify software before deploying it to production. A staging environment is most likely to have the same software version as production, as it mimics the real-world conditions and configurations that will be encountered in production. A testing environment is a separate environment that is used to perform various types of testing on software, such as functional testing, performance testing, security testing, etc. A testing environment may not have the same software version as production, as it may undergo frequent changes or updates based on testing results or feedback. An integration environment is a separate environment that is used to combine and test software components or modules from different developers or sources, to ensure that they work together as expected.
An integration environment may not have the same software version as production, as it may involve different versions or branches of software from different sources. A development environment is a separate environment that is used by developers to create and modify software code. A development environment may not have the same software version as production, as it may contain unfinished or untested code that has not been released yet.

Explanation/Reference:
The word NOT is the keyword used in the question, You need to find out a functionality which is not performed by application layer of a TCP/IP model.
End-to-end connection is the Transport layer functionality in TCP/IP model.
For your exam you should know below information about TCP/IP model:
Network Models

Layer 4. Application Layer
Application layer is the top most layer of four layer TCP/IP model. Application layer is present on the top of the Transport layer. Application layer defines TCP/IP application protocols and how host programs interface with Transport layer services to use the network.
Application layer includes all the higher-level protocols like DNS (Domain Naming System), HTTP (Hypertext Transfer Protocol), Telnet, SSH, FTP (File Transfer Protocol), TFTP (Trivial File Transfer Protocol), SNMP (Simple Network Management Protocol), SMTP (Simple Mail Transfer Protocol) , DHCP (Dynamic Host Configuration Protocol), X Windows, RDP (Remote Desktop Protocol) etc.
Layer 3. Transport Layer
Transport Layer is the third layer of the four layer TCP/IP model. The position of the Transport layer is between Application layer and Internet layer. The purpose of Transport layer is to permit devices on the source and destination hosts to carry on a conversation. Transport layer defines the level of service and status of the connection used when transporting data.
The main protocols included at Transport layer are TCP (Transmission Control Protocol) and UDP (User Datagram Protocol).
Layer 2. Internet Layer
Internet Layer is the second layer of the four layer TCP/IP model. The position of Internet layer is between Network Access Layer and Transport layer. Internet layer pack data into data packets known as IP datagram's, which contain source and destination address (logical address or IP address) information that is used to forward the datagram's between hosts and across networks. The Internet layer is also responsible for routing of IP datagram's.
Packet switching network depends upon a connectionless internetwork layer. This layer is known as Internet layer. Its job is to allow hosts to insert packets into any network and have them to deliver independently to the destination. At the destination side data packets may appear in a different order than they were sent. It is the job of the higher layers to rearrange them in order to deliver them to proper network applications operating at the Application layer.
The main protocols included at Internet layer are IP (Internet Protocol), ICMP (Internet Control Message Protocol), ARP (Address Resolution Protocol), RARP (Reverse Address Resolution Protocol) and IGMP (Internet Group Management Protocol).
Layer 1. Network Access Layer
Network Access Layer is the first layer of the four layer TCP/IP model. Network Access Layer defines details of how data is physically sent through the network, including how bits are electrically or optically signaled by hardware devices that interface directly with a network medium, such as coaxial cable, optical fiber, or twisted pair copper wire.
The protocols included in Network Access Layer are Ethernet, Token Ring, FDDI, X.25, Frame Relay etc.
The most popular LAN architecture among those listed above is Ethernet. Ethernet uses an Access Method called CSMA/CD (Carrier Sense Multiple Access/Collision Detection) to access the media, when Ethernet operates in a shared media. An Access Method determines how a host will place data on the medium.
IN CSMA/CD Access Method, every host has equal access to the medium and can place data on the wire when the wire is free from network traffic. When a host wants to place data on the wire, it will check the wire to find whether another host is already using the medium. If there is traffic already in the medium, the host will wait and if there is no traffic, it will place the data in the medium. But, if two systems place data on the medium at the same instance, they will collide with each other, destroying the data. If the data is destroyed during transmission, the data will need to be retransmitted. After collision, each host will wait for a small interval of time and again the data will be retransmitted.
Protocol Data Unit (PDU) :
Protocol Data Unit - PDU

The following answers are incorrect:
The other functionalities described in the options are performed by application layer in TCP/IP model.
The following reference(s) were/was used to create this question:
CISA review manual 2014 page number 272

Explanation/Reference:
Explanation:
Correction of code should not be a responsibility of the quality assurance team as it would not ensure segregation of duties and would impair the team's independence. The other choices are valid quality assurance functions.

Section: Protection of Information Assets
Explanation:
The common gateway interface (CGI) is a standard way for a web server to pass a user's request to an
application program and to move data back and forth to the user. When the user requests a web page (for
example, by clicking on a highlighted word orienteering a web site address), the server sends back the
requested page. However, when a user fills out a form on a web page and submits it, it usually needs to be
processed by an application program. The web server typically passes the form information to a small
application program that processes the data and may send back a confirmation message. This method, or
convention, for passing data back and forth between the server and the application is called the common
gateway interface (CGI). It is part of the web's HTTP protocol.