Section: Information System Acquisition, Development and Implementation Explanation:
Embedded database 4GLsare depend on self-contained database management systems. These characteristics often makes them more user-friendly but also may lead to applications that are not integrated well with other product applications. Example includes FOCUS, RAMIS II and NOMAD 2.
For CISA exam you should know below mentioned types of 4GLs
Query and report generator - These specialize language can extract and produce reports. Recently more powerful language has been produced that can access database records, produce complex on-line output and be developed in an almost natural language.
Embedded database 4GLs - These depend on self-contained database management systems. These characteristics often makes them more user-friendly but also may lead to applications that are not integrated well with other product applications. Example includes FOCUS, RAMIS II and NOMAD 2.
Relational database 4GLs - These high level language products are usually an optional feature on vendor's DBMS product line. These allow the application developer to make better use of DBMS product, but they often are not end-user-oriented. Example include SQL+ MANTIS and NATURAL.
Application generators - These development tools generate lower level programming languages(3GL) such as COBOL and C. The application can be further tailored and customized. Data processing development personnel, not end user, use application generators.
The following were incorrect answers:
Query and report generator - These specialize language can extract and produce reports.
Relational database 4GLs - These high level language products are usually an optional feature on vendor's DBMS product line.
Application generators - These development tools generate lower level programming languages(3GL) such as COBOL and C.
Reference:
CISA review manual 2014 Page number 209

Explanation/Reference:
Explanation:
Redundancy by building some form of duplication into the network components, such as a link, router or switch to prevent loss, delays or data duplication is a control over component communication failure or error. Other related controls are loop/echochecks to detect line errors, parity checks, error correction codes and sequence checks. Choices A, B and D are communication network controls.

Section: Information System Operations, Maintenance and Support
Explanation:
The word INCORRECTLY keyword is used in the question.
You need to find out the service or functionality which is not performed by application layer of a TCP/IP model.
The reliable or unreliable delivery of a message is the functionality of transport layer of a 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):

The following answers are incorrect:
The other options correctly describe functionalities of application layer in TCP/IP model.
Reference:
CISA review manual 2014 page number 272

Worms are malicious programs that can run independently and can propagate without the aid of a carrier program such as email.