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Common Technical Interview Questions and Answers Update on May 06, 2022

5G QoS

Question 1

Question

Which of the following are some basic network requirements for 5G, as specified by the 3rd Generation Partnership Project (3GPP)?

A. Priority, policy, policy control and QoS
B. Efficient signaling, fixed mobile convergence, enhanced mobility management and network capability exposure
C. Network slice selection function, network repository function, user plane function and policy control function
D. Network slicing, efficiency, diverse mobility management and connectivity models

Answer

D. Network slicing, efficiency, diverse mobility management and connectivity models

Question 2

Question

True or false: The process of 5G tunneling enables subscriber access through multiaccess networks in seamless, integrated fashion.

A. True
B. False

Answer

B. False

Question 3

Question

What is the definition of QoS?

A. A set of rules specifying the user plane services and functions available to a particular user, supplied by the network
B. The measurable end-to-end performance properties of a network service, which can be guaranteed in advance by a service-level agreement (SLA) between a user and a service provider
C. The process by which network resources are controlled to implement a given policy for a given user
D. A value assigned to specific packets transmitted to/from a user that determines the relative importance of transmitting those packets during the upcoming opportunity to use the medium

Answer

B. The measurable end-to-end performance properties of a network service, which can be guaranteed in advance by a service-level agreement (SLA) between a user and a service provider

Question 4

Question

Which of the following are some common functions used to provide QoS in the data plane?

A. Session management function, user plane function, policy control function and network repository function
B. Flow bit rates, aggregate bit rates, notification control and default values
C. Traffic classification, packet marking, traffic shaping and congestion avoidance
D. Resource type, priority level, packet error rate and maximum data burst volume

Answer

C. Traffic classification, packet marking, traffic shaping and congestion avoidance

Question 5

Question

True or false: SLAs typically represent an agreement between a customer and a provider of a service that specifies the level of availability, serviceability, performance, operation or other attributes of the service.

A. True
B. False

Answer

A. True

Question 6

Question

Which is a common function used to provide QoS in the management plane?

A. SLA
B. Traffic restoration
C. Policy
D. All of the above

Answer

D. All of the above

Question 7

Question

What is the difference between QoS parameters and characteristics?

A. QoS parameters are used at configuration time to determine the network resources needed for creating network slices. QoS characteritics are more relevant to dynamic decisions made during the operation of the QoS flow, such as using the priority level as a tiebreaker when two flows compete for resources.
B. QoS parameters are more relevant to dynamic decisions made during the operation of the QoS flow, such as using the priority level as a tiebreaker when two flows compete for resources. QoS characteristics are used at configuration time to determine the network resources needed for creating network slices.
C. QoS parameters are variables that are typically the same for a wide variety of instances of an application. QoS characteristics define the requirements associated with a QoS flow.
D. None of the above

Answer

A. QoS parameters are used at configuration time to determine the network resources needed for creating network slices. QoS characteritics are more relevant to dynamic decisions made during the operation of the QoS flow, such as using the priority level as a tiebreaker when two flows compete for resources.

Question 8

Question

Which is an operational requirement for network slicing, as specified by 3GPP?

A. Support is needed to provide connectivity to home and roaming users in the same network slice.
B. Creation, modification and deletion of a network slice should have no or minimal impact on traffic and services in other network slices in the same network.
C. Operators must apply all the requirements to their allocated network resources.
D. IP Multimedia Subsystem needs to be supported independent of network slices.

Answer

B. Creation, modification and deletion of a network slice should have no or minimal impact on traffic and services in other network slices in the same network.

Question 9

Question

True or false: Network slicing is made possible by the softwarization techniques of QoS.

A. True
B. False

Answer

B. False

Question 10

Question

What is the difference between SDN and NFV?

A. SDN enables effective deployment of cloud resources to the appropriate edge node for a given application and given fixed or mobile user; NFV provides for flexible and dynamic creation and management of paths.
B. SDN enables the movement of edge resources and services to dynamically accommodate mobile users; NFV creates paths that use an access node for one or both ends of a connection involving a wireless device.
C. SDN operates to monitor and enforce QoS requirements by controlling the behavior of the QoS flow for each slice; NFV implements the network functions in a network slice, enabling the isolation of each network slice from all other network slices.
D. All of the above

Answer

C. SDN operates to monitor and enforce QoS requirements by controlling the behavior of the QoS flow for each slice; NFV implements the network functions in a network slice, enabling the isolation of each network slice from all other network slices.

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