Tuesday, 17 January 2017

Top 95 AWS VPC Interview Questions Answers PDF

Here we come with most growing technology related interview questions, the technology is known as Amazon Virtual Private Cloud, Today is 18 Jan 2017 and we are posting this set after got lots of request from our previous article readers( 60 AWS Interview Questions) which become very famous and we got many comments and one guys send thanks email to us because he got selected and he respect our previous article with play big role in his selection.
He is cracked "Adobe Systems" AWS interview and got jobs. We say thanks for such a kind email. :)
And we want to get more such emails from you(readers) Best of luck...... pdf will be available soon

TOP 95 AWS VPC INTERVIEW QUESTIONS ANSWERS

1). What is Amazon Virtual Private Cloud (Amazon VPC)?

2). What are the connectivity options for my VPC?

3). How do you connect my VPC to the Internet?

4). What are the components of Amazon VPC?

5). Why should you use Amazon VPC, Advantage of using AWS VPC?

6). What is the difference between stateful and stateless filtering?

7). Within Amazon VPC, can you use SSH key pairs created for instances within Amazon EC2, and vice versa?

8). Can Amazon EC2 instances within a VPC communicate with Amazon EC2 instances not within a VPC?

9). Why can’t you ping the router, or my default gateway, that connects my subnets?

10). Can you monitor the network traffic in your VPC?

11). Within which Amazon EC2 region(s) is Amazon VPC available?

12). Can a VPC span multiple Availability Zones?

13). Can you use your existing AMIs in Amazon VPC?

14). Can you employ Amazon CloudWatch within Amazon VPC?

15). How do you specify which Availability Zone my Amazon EC2 instances are launched in?

16). Are there any bandwidth limitations for Internet gateways? Do you need to be concerned about its availability? Can it be a single point of failure?

17). How do you secure Amazon EC2 instances running within my VPC?

18). What are the differences between security groups in a VPC and network ACLs in a VPC?

19). How do you determine which Availability Zone my subnets are located in?

20). When you call DescribeInstances(), do you see all of my Amazon EC2 instances, including those in EC2-Classic and EC2-VPC?

21). When you call DescribeVolumes(), do you see all of my Amazon EBS volumes, including those in EC2-Classic and EC2-VPC?

22). How many Amazon EC2 instances can you use within a VPC?

23). Can you employ Auto Scaling within Amazon VPC?

24). What is the IP range of a default VPC?

25). How many default VPCs can you have?

26). How many default subnets are in a default VPC?

27). Can you launch Amazon EC2 Cluster Instances in a VPC?

28). What is a default VPC?

29). What are the advantage of a default VPC?

30). What accounts are enabled for default VPC?

31). How can you know if my account is configured to use a default VPC?

32). Can you create other VPCs and use them in addition to my default VPC?

33). Can you create additional subnets in my default VPC, such as private subnets?

34). Will you need to know anything about Amazon VPC in order to use a default VPC?

35). What are the differences between instances launched in EC2-Classic and EC2-VPC?

36). Can you use my existing Amazon EBS snapshots?

37). Can you boot an Amazon EC2 instance from an Amazon EBS volume within Amazon VPC?

38). Can you use Amazon EC2 Reserved Instances with Amazon VPC?

39). Do you need to have a VPN connection to use a default VPC?

40). Can you delete a default VPC?

41). Can you delete a default subnet?

42). If you delete my side of a peering connection, will the other side still have access to my VPC?

43). If you peer VPC A to VPC B and I peer VPC B to VPC C, does that mean VPCs A and C are peered?

44). You have an existing EC2-Classic account. Can I get a default VPC?

45). You really want a default VPC for my existing EC2 account. Is that possible?

46). How are IAM accounts impacted by default VPC?

47). Can you attach or detach one or more network interfaces to an EC2 instance while it’s running?

48). What if your peering connection goes down?

49). Can you create a peering connection to a VPC in a different region?

50). Can you peer my VPC with a VPC belonging to another AWS account?

51). Can you have more than two network interfaces attached to my EC2 instance?

52). Can you attach a network interface in one Availability Zone to an instance in another Availability Zone?

53). Can you attach a network interface in one VPC to an instance in another VPC?

54). Can you use Elastic Network Interfaces as a way to host multiple websites requiring separate IP addresses on a single instance?

55). Can you detach the primary interface (eth0) on my EC2 instance?

56). Can you use AWS Direct Connect or hardware VPN connections to access VPCs I’m peered with?

57). Can you peer two VPCs with matching IP address ranges?

58). Do you need an Internet Gateway to use peering connections?

59). Is VPC peering traffic within the region encrypted?

60). Is there any bandwidth limitations for peering connections?

61). What is ClassicLink?

62). How do you use ClassicLink?

63). Does the EC2-Classic instance become a member of the VPC?

64). Will ClassicLink settings on my EC2-Classic instance persist through stop/start cycles?

65). Can you modify the VPC route tables? How?

66). Can you specify which subnet will use which gateway as its default?

67). Can you use the AWS Management Console to control and manage Amazon VPC?

68). How many VPCs, subnets, Elastic IP addresses, Internet gateways, customer gateways, virtual private gateways, and VPN connections can you create?

69). Does the Amazon VPC VPN Connection have a Service Level Agreement (SLA)?

70). What does an Amazon VPC router do?

71). Does Amazon VPC support multicast or broadcast?

72). How do instances in a VPC access the Internet?

73). How do instances without public IP addresses access the Internet?

74). How does a hardware VPN connection work with Amazon VPC?

75). What is IPsec?

76). Which customer gateway devices can I use to connect to Amazon VPC?

77). Name any VPCs for which you cannot enable ClassicLink?

78). Can traffic from an EC2-Classic instance travel through the Amazon VPC and egress through the Internet gateway, virtual private gateway, or to peered VPCs?

79). Does ClassicLink affect the access control between the EC2-Classic instance, and other instances that are in the EC2-Classic platform?

80). What tools are available to me to help troubleshoot my Hardware VPN configuration?

81). How do I connect a VPC to my corporate datacenter?

82). Are there any VPN connection throughput limitations?

83). Can you NAT your CGW behind a router or firewall?

84). What IP address do you use for your CGW address?

85). How do you assign IP address ranges to VPCs?

86). What IP address ranges are assigned to a default VPC?

87). Can you assign any IP address to an instance?

88). Can you assign multiple IP addresses to an instance?

89). What defines billable VPN connection-hours?

90). Can you change a VPC's size?

91). How many subnets can I create per VPC?

92). Is there a limit on how large or small a subnet can be?

93). How do you assign private IP addresses to Amazon EC2 instances within a VPC?

94). How do you disable NAT-T on my connection?

95). Can Amazon EC2 instances within a VPC communicate with Amazon S3?

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Can Amazon EC2 instances within a VPC communicate with Amazon S3?

Yes. There are multiple options for your resources within a VPC to communicate with Amazon S3. You can use VPC Endpoint for S3, which makes sure all traffic remains within Amazon's network and enables you to apply additional access policies to your Amazon S3 traffic. You can use an Internet gateway to enable Internet access from your VPC and instances in the VPC can communicate with Amazon S3. You can also make all traffic to Amazon S3 traverse the Direct Connect or VPN connection, egress from your datacenter, and then re-enter the public AWS network.

How do you assign private IP addresses to Amazon EC2 instances within a VPC?

When you launch an Amazon EC2 instance within a VPC, you may optionally specify the primary private IP address for the instance. If you do not specify the primary private IP address, AWS automatically addresses it from the IP address range you assign to that subnet. You can assign secondary private IP addresses when you launch an instance, when you create an Elastic Network Interface, or any time after the instance has been launched or the interface has been created.

What defines billable VPN connection-hours?

VPN connection-hours are billed for any time your VPN connections are in the "available" state. You can determine the state of a VPN connection via the AWS Management Console, CLI, or API. If you no longer wish to use your VPN connection, you simply terminate the VPN connection to avoid being billed for additional VPN connection-hours.

Can you assign multiple IP addresses to an instance?

Yes. You can assign one or more secondary private IP addresses to an Elastic Network Interface or an EC2 instance in Amazon VPC. The number of secondary private IP addresses you can assign depends on the instance type. See the EC2 User Guide for more information on the number of secondary private IP addresses that can be assigned per instance type.

How do you assign IP address ranges to VPCs?

You assign a single Classless Internet Domain Routing (CIDR) IP address block when you create a VPC. Subnets within a VPC are addressed from this range by you. A VPC can be assigned at most one (1) IP address range at any given time; addressing a VPC from multiple IP address ranges is currently not supported. Please note that while you can create multiple VPCs with overlapping IP address ranges, doing so will prohibit you from connecting these VPCs to a common home network via the hardware VPN connection. For this reason we recommend using non-overlapping IP address ranges.  You can allocate an Amazon-provided IPv6 CIDR block to your VPC.

Are there any VPN connection throughput limitations?

Amazon does not enforce any restrictions on VPN throughput. However, other factors, such as the cryptographic capability of your customer gateway, the capacity of your Internet connection, average packet size, the protocol being used (TCP vs. UDP), and the network latency between your customer gateway and the virtual private gateway can affect throughput.