Explanation

Technical security refers to the use of technology to protect information and systems.

Items like call interception, CCTV (closed-circuit television), and recording microphones are all technological tools

They are used for surveillance and monitoring, which fall under the category of technical security.

Explanation

Security cards are mandatory for all authorized personnel in a controlled or secure environment for identification and access.

Reporting a lost security card immediately helps prevent unauthorized access and potential security breaches.

Explanation

Physical security measures are designed to protect physical assets like buildings, equipment, and data from unauthorized access or damage. A security guard physically monitors and restricts access to a facility,

While scanning devices like metal detectors or security cameras can detect potential threats. 

Explanation

 Security clearance is mandatory for sensitive government positions

Especially those involving access to classified information or secure facilities,

But it is generally not required for university admission, general medical exams, or driving licenses

Explanation

We are given:

• Average of 5 numbers = 10

• So, total sum of the 5 numbers = 10 × 5 = 50

Now, one number (20) is removed:

• New sum = 50 − 20 = 30

• New number of values = 5 − 1 = 4

So, new average = 30 ÷ 4 = 7.5

Explanation

Access Control: This involves restricting entry to authorized personnel only.

Methods include key cards, biometric scanners, and security personnel.

The recognized layers of physical security include both deterrence and access control, as well as detection and identification.

Surveillance: CCTV cameras and monitoring systems

Explanation

 These are standard classification levels used in government and defense sectors to indicate the sensitivity of information.

• Confidential: Could cause damage if disclosed.
• Secret: Could cause serious damage.
• Top Secret: Could cause exceptionally grave damage.