C++ | MCQs

Explanation

• The control in SCADA is Supervisory control because SCADA is Supervisory Control and Data Acquisition.
• It stores information from the remotely located data collection sensors and transducers to support the control of equipment, devices, and automated functions.

Explanation

• In a Star Network Topology, each network node (computer, printer, etc.) is connected to a central device called a hub or switch.
• This central device acts as a connection point for all the nodes, and data transmission occurs through it. 
• This topology is called a star topology because the connections resemble a star, with the hub at the center and the nodes at the points.

Explanation

"Security can be set through passwords, kerberos tickets, or certificates, Secure access to your EC2 AMIs is controlled by passwords, Kerberos, and 509 certificates, and Most of the system image templates that Amazon AWS offers are based on Red Hat Linux." all are the correct statements.

Explanation

• The 'CREATE TABLESPACE' privilege allows users to create tablespaces at the server level.
• Tablespaces are used for managing the physical storage of tables and indexes.
• This privilege falls under the realm of server administration.

Explanation

• The metric that is commonly used to evaluate classification models and represents the ratio of correctly predicted positive instances to all positive instances is recall.
• Recall is a measure of a classifier’s completeness, and it is also known as sensitivity, hit rate, or true positive rate (TPR).
• The formula for recall is the number of true positives divided by the sum of true positives and false negatives.

Explanation

Telnet is a text-based computer protocol that allows users to remotely access and manage a computer or network device. It uses a command-line interface (CLI) to send and receive text-based commands and responses. Telnet is a client-server protocol, where the user's device acts as the client and the remote device acts as the server.

Telnet is typically used for:

• Remote access to servers, routers, and other network devices
• Command-line interface (CLI) access to network devices
• Troubleshooting and debugging network connections
• Remote execution of commands and scripts

Explanation

The "show interfaces" command displays the configurable parameters and statistics of all interfaces on the router, including:

• Interface status (up or down)
• IP address and subnet mask
• Speed and duplex settings
• Number of packets received and transmitted
• Number of errors and collision- And other interface-specific settings and statistics

Explanation

• ".cat" is not a Country Code Top Level Domain (ccTLD).
• It's actually a sponsored top-level domain intended to promote the Catalan language and culture.

Explanation

• Heuristics refer to mental shortcuts or rules of thumb that help individuals make judgments, solve problems, and make decisions efficiently and effectively.
• Heuristics are often based on experience, intuition, and common sense, and are used to simplify complex problems and arrive at a solution that is "good enough" or satisfactory.

Explanation