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AWS Solutions Architect Questions and Answers part-3

    AWS Solutions Architect Questions and Answers Part-3

    Get ready to excel in your AWS Solutions Architect certification with this comprehensive collection of questions and answers. Covering critical topics like cloud architecture design, AWS services, security best practices, and cost optimization, these Q&A sessions will help you gain a deep understanding of AWS concepts and prepare effectively for the exam. Whether you are a beginner or an experienced professional, these answers provide clear explanations and practical examples to solidify your AWS knowledge and boost your confidence.

    Test your skills

    1. A user wants to use an EBS-backed Amazon EC2 instance for a temporary job. Based on the input data, the job                  is most likely to finish within a week. Which of the following steps should be followed to terminate the instance                  automatically once the job is finished?

                      A. Configure the EC2 instance with a stop instance to terminate it.
                      B. Configure the EC2 instance with ELB to terminate the instance when it remains idle.
                      C. Configure the CIoudWatch alarm on the instance that should perform the termination action once the                                         instance is idle.
                      D. Configure the Auto Scaling schedule actMty that terminates the instance after 7 days.

    Answer: C

    Explanation:
    Auto Scaling can start and stop the instance at a pre-defined time. Here, the total running time is unknown.
    Thus, the user has to use the CIoudWatch alarm, which monitors the CPU utilization. The user can create an alarm that is triggered when the average CPU utilization percentage has been lower than 10 percent for 24 hours, signaling that it is idle and no longer in use. When the utilization is below the threshold limit, it will terminate the instance as a part of the instance action.

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    2. Which of the following is true of Amazon EC2 security group?

                       A. You can modify the outbound rules for EC2-Classic.
                       B. You can modify the rules for a security group only if the security group controls the traffic for just                                               one instance.
                       C. You can modify the rules for a security group only when a new instance is created.
                       D. You can modify the rules for a security group at any time.

    Answer: D

    Explanation:
    A security group acts as a virtual firewall that controls the traffic for one or more instances. When you launch an instance, you associate one or more security groups with the instance. You add rules to each security group that allow traffic to or from its associated instances. You can modify the rules for a security group at any time; the new rules are automatically applied to all instances that are associated with the security group.

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    3. An Elastic IP address (EIP) is a static IP address designed for dynamic cloud computing. With an EIP, you can                      mask the failure of an instance or software by rapidly remapping the address to another instance in your                              account. Your EIP is associated with your AWS account, not a particular EC2 instance, and it  remains associated                  with your account until you choose to explicitly release it. By default how many EIPs is each AWS account limited to on a      per region basis?

                       A. 1
                       B. 5
                       C. Unlimited
                       D. 10

    Answer: B

    Explanation:
    By default, all AWS accounts are limited to 5 Elastic IP addresses per region for each AWS account, because public (IPv4) Internet addresses are a scarce public resource. AWS strongly encourages you to use an EIP primarily for load balancing use cases, and use DNS hostnames for all other inter-node communication. If you feel your architecture warrants additional EIPs, you would need to complete the Amazon EC2 Elastic IP Address Request Form and give reasons as to your need for additional addresses.

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    4. In Amazon EC2, partial instance-hours are billed                   

                         A. per second used in the hour
                         B. per minute used
                         C. by combining partial segments into full hours
                         D. as full hours

    Answer: D

    Explanation:
    Partial instance-hours are billed to the next hour.

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    5. In EC2, what happens to the data in an instance store if an instance reboots (either intentionally or                                  unintentionally)?

                         A. Data is deleted from the instance store for security reasons.
                         B. Data persists in the instance store.
                         C. Data is partially present in the instance store.
                         D. Data in the instance store will be lost.

    Answer: B

    Explanation:
    The data in an instance store persists only during the lifetime of its associated instance. If an instance
    reboots (intentionally or unintentionally), data in the instance store persists. However, data on instance store
    volumes is lost under the following circumstances.
    Failure of an underlying drive
    Stopping an Amazon EBS-backed instance Terminating an instance

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