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AWS Review > EC2 COPY COPY > Flashcards

EC2 COPY COPY Flashcards

1
Q

True or False: Throughput-optimized volumes cannot be boot volumes.

A

True.

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2
Q

How long does it take for changes to a security group to take effect?

A

Changes take effect immediately.

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3
Q

True or False: EC2 instance termination protection is turned on by default.

A

False.

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4
Q

True or False: EC2 instance termination protection is turned off by default.

A

True.

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5
Q

__________ can help you reduce costs by allowing you to use your existing server-bound software licences.

A

Dedicated hosts.

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6
Q

Which EC2 pricing options is recommended for:

  • Apps that have flexible start and end times
  • Apps that are only feasible at very low compute prices
  • Users with urgent computing needs for large amounts of additional capacity
A

Spot instances.

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7
Q

True or False: When creating snapshots of EBS volumes that serve as root devices, you should stop the instance first.

A

True.

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8
Q

Which EC2 instance type provides hardware acceleration for your code (FPGA)?

A

F

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9
Q

What is EFS?

A

A file storage service for EC2 instances.

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10
Q

Which EC2 instance type is the lowest-cost for general purposes?

A

T

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11
Q

True or False: No EBS volumes attached to default AMIs can be encrypted.

A

False. Volumes other than the root volume may be encrypted.

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12
Q

Can you change EBS volume size, size and storage type on-the-fly?

A

Yes.

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13
Q

True or False: When you first create a security group, all outbound traffic is allowed by default.

A

True.

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14
Q

Which AWS offering is a file storage service for EC2 instances?

A

Elastic File System (EFS).

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15
Q

You can share snapshots with other people, but only if they’re __________.

A

Unencrypted.

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16
Q

True or False: When you first create a security group, all outbound traffic is blocked by default.

A

False.

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17
Q

When AWS terminates your spot instance early, who pays for the hour of compute time?

A

AWS.

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18
Q

EBS allows you to create __________ and attach them to EC2 instances.

A

Storage volumes.

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19
Q

What is the speciality of the C EC2 instance type?

A

Compute optimized.

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20
Q

True or False: You can only mount one EBS volume on a single EC2 instance.

A

True.

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21
Q

Are security groups stateful?

A

Yes.

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22
Q

True or False: Reserved instances are recommended for customers than can commit to using EC2 over a year or three years.

A

True.

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23
Q

Which EC2 pricing option allows you to pay for 1 or 3 years of compute capacity in advance to receive up to a 75% discount compared to on-demand pricing?

A

Reserved instances.

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24
Q

Which EBS volumes cannot be boot volumes?

A

Throughput-optimized HDD and Cold HDD.

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25
Q

What is the speciality of the T EC2 instance type?

A

General purpose. Lowest cost.

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26
Q

__________ are placed in a specific availability zone, where they are automatically replicated to protect you from the failure of a single component.

A

EBS volumes.

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27
Q

What are AMIs used for?

A

As templates for creating new EC2 instances.

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28
Q

EC2 instance termination protection is turned __________ by default.

A

Off.

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29
Q

Which EC2 instance type is memory optimized (not to the extreme)?

A

R

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30
Q

What is a snapshot of an EBS volume?

A

A copy of the EBS volume at a particular point in time.

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31
Q

True or False: When AWS terminates your spot instance early, you’re still billed for the whole hour.

A

False. AWS pays for the whole hour.

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32
Q

What are the different types of magnetic (HDD) EBS volumes?

A
  • Throughput-optimized HDD (ST1)
  • Cold HDD (SC1)
  • Magnetic standard
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33
Q

What is the speciality of the F EC2 instance type?

A

Field programmable gate array.

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34
Q

__________ allows you to create storage volumes and attach them to EC2 instances.

A

EBS.

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35
Q

True or False: General purpose SSD volumes are designed for I/O intensive applications.

A

False. Provisioned IOPS SSD volumes were designed for that.

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36
Q

Snapshots of EBS volumes are stored in __________.

A

S3.

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37
Q

What does it mean that snapshots are incremental?

A

Only blocks that have changed since the last snapshot are moved to S3.

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38
Q

True or False: When you first create a security group, all inbound traffic is allowed by default.

A

False.

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39
Q

Can you create AMIs from EBS volumes?

A

Yes.

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40
Q

True or False: Dedicated hosts can be purchased as a Reservation for up to 70% off of the on-demand price.

A

True.

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41
Q

What is a dedicated host?

A

A physical EC2 server dedicated for your use.

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42
Q

Can you specify deny rules within a security group?

A

No. You can only specify allow rules.

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43
Q

What is the speciality of the M EC2 instance type?

A

General purpose.

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44
Q

Templates used to create new EC2 instances are called __________.

A

Amazon Machine Images (AMIs).

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45
Q

Which EC2 instance type is optimized for compute?

A

C

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46
Q

True or False: Although on default AMIs the EBS root volume can’t be encrypted, additional volumes can be encrypted.

A

True.

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47
Q

Which EC2 pricing option allows you to request spare EC2 computing capacity for up to 90% off the on-demand price?

A

Spot instances.

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48
Q

Which EBS volume type is recommended for low cost storage for infrequently accessed workloads?

A

Cold HDD volumes.

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49
Q

True or False: When you terminate our spot instance early, you’re refunded for the rest of the hour.

A

False. You pay for the entire hour unless AWS terminates your spot instance.

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50
Q

True or False: Cold HDD volumes can be boot volumes.

A

False.

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51
Q

True or False: Spot instances are recommended for users with urgent computing needs for large amounts of additional capacity.

A

True.

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52
Q

__________ are designed for I/O intensive apps like large relational or NoSQL databases.

A

Provisioned IOPS SSD volumes.

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53
Q

Where are snapshots stored?

A

S3.

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54
Q

What does AMI stand for?

A

Amazon Machine Image.

55
Q

True or False: You cannot create AMIs from snapshots.

A

False.

56
Q

To move an EC2 volume from one AZ/Region to another, take a __________ or image of it, then copy it to the new AZ/Region.

A

Snapshot.

57
Q

True or False: Magnetic standard volumes can be boot volumes.

A

True.

58
Q

True or False: You can only specify allow rules within a security group.

A

True.

59
Q

What is the speciality of the I EC2 instance type?

A

High speed storage.

60
Q

Snapshots are typically used for __________.

A

Backup.

61
Q

True or False: Changes to security groups can take up to five minutes to take effect.

A

False. Changes take effect immediately.

62
Q

True or False: Security groups cannot be used to block specific IP addresses.

A

True.

63
Q

True or False: An EBS volume from us-west-2c can be mounted to an EC2 instance in us-west-2a.

A

False. The EBS volume and EC2 instance must be in the same availability zone.

64
Q

True or False: Snapshots of encrypted volumes are encrypted automatically.

A

True.

65
Q

What is the speciality of the G EC2 instance type?

A

Graphics intensive.

66
Q

__________ are the lowest cost per GB of all bootable EBS volume types.

A

Magnetic standard.

67
Q

A __________ is a physical EC2 server provisioned only for your use.

A

Dedicated host.

68
Q

True or False: With security groups, if you create an inbound rule allowing traffic, you must remember to create an outbound rule allowing that same traffic out.

A

False. Security groups are stateful.

69
Q

All EBS volume types can be modified except for __________.

A

Magnetic standard.

70
Q

What happens to the root EBS volume by default when the EC2 instance it’s attached to is terminated?

A

The volume is deleted.

71
Q

What does it mean for a security group to be stateful?

A

If you create an inbound rule allowing traffic in, that traffic is automatically allowed back again.

72
Q

True or False: On-demand instances are recommended for apps with unpredictable workloads that cannot be interrupted.

A

True.

73
Q

Provisioned IOPS SSD volumes are designed for __________ apps.

A

I/O intensive.

74
Q

True or False: Dedicated hosts are recommended for apps that may require reserved capacity.

A

False. Reserved instances are recommended for that.

75
Q

Can an EBS volume be directly moved from one availability zone to another?

A

No.

76
Q

True or False: Dedicated hosts can be purchased on-demand (hourly).

A

True.

77
Q

Which EC2 pricing option is recommended for:

  • Apps with steady state usage
  • Apps that may require reserved capacity
  • Customers that can commit to using EC2 over a 1 or 3 year term to reduce their total computing costs
A

Reserved instances.

78
Q

Which EC2 instance type is optimized for extreme memory requirements?

A

X

79
Q

EBS volumes are automatically __________ to protect you from the failure of a single component.

A

Replicated.

80
Q

__________ volumes are recommended for data warehouses.

A

Throughput-optimized HDD volumes.

81
Q

Which EC2 pricing option is useful for regulatory requirements that may not support multitenant virtualization?

A

Dedicated hosts.

82
Q

True or False: When you first create a security group, all inbound traffic is blocked by default.

A

True.

83
Q

What is the speciality of the D EC2 instance type?

A

Dense storage.

84
Q

Which EC2 instance type specializes in dense storage?

A

D

85
Q

True or False: Changes to security groups take effect immediately.

A

True.

86
Q

EBS root volumes of the default AMIs (can|cannot) be encrypted.

A

Cannot.

87
Q

In order to mount an EBS volume on an EC2 instance, both must exist in the same __________.

A

Availability zone.

88
Q

True or False: Volumes restored from encrypted snapshots are not encrypted automatically.

A

False.

89
Q

Which EC2 pricing option is recommended for:

  • Users that prefer compute without any up-front payment or long-term commitment
  • Apps with short-term, spiky, or unpredictable workloads that can’t be interrupted
  • Apps being developed or tested on EC2 for the first time
A

On-demand instances.

90
Q

To move an EC2 volume from one AZ/Region to another, take a snap or __________ of it, then copy it to the new AZ/Region.

A

AMI.

91
Q

True or False: General purpose SSD volumes balance both price and performance.

A

True.

92
Q

Can you snapshot an EBS volume while the EC2 instance it’s attached to is running?

A

Yes.

93
Q

What are the steps to move an EBS volume from one availability zone to another?

A
  1. Take a snapshot of the volume.
  2. From that snapshot, create a new volume and assign it a different availability zone.
94
Q

True or False: Reserved instances are recommended for apps with steady state usage.

A

True.

95
Q

True or False: A single security group can cover a max of 256 EC2 instances

A

False. One security group can cover an unlimited number of EC2 instances.

96
Q

EBS volumes are placed in a specific __________, where they are automatically replicated to protect you from the failure of a single component.

A

Availability zone.

97
Q

True or False: All EBS volume types can be modified.

A

False. Magnetic standard EBS volumes cannot be modified.

98
Q

__________ are typically used to back up EBS volumes.

A

Snapshots.

99
Q

Which EBS volumes can be boot volumes?

A

General purpose SSD, Provisioned IOPS SSD, and Magnetic standard.

100
Q

Dedicated hosts can help you reduce costs by allowing you to use __________.

A

Your existing server-bound software licenses.

101
Q

True or False: When AWS terminates your spot instance early, then only pay for the rest of the hour.

A

False. AWS pays for the WHOLE hour.

102
Q

Which SSD EBS volume types cannot be boot volumes?

A

None. All SSD volumes can be boot volumes.

103
Q

What is the speciality of the P EC2 instance type?

A

Graphics/General purpose GPU.

104
Q

True or False: Spot instances are recommended for apps that are only feasible at very low compute prices.

A

True.

105
Q

What is the speciality of the R EC2 instance type?

A

Memory optimized.

106
Q

What does EBS stand for?

A

Elastic Block Store.

107
Q

What is the speciality of the X EC2 instance type?

A

Extreme memory optimized.

108
Q

How many EC2 instances can be covered by a security group?

A

Any number.

109
Q

True or False: On-demand instances are recommended for apps being developed on EC2 for the first time.

A

True.

110
Q

Which HDD EBS volume types can be boot volumes?

A

Only the magnetic standard volume type.

111
Q

Which EC2 instance type is optimized for graphics and general purpose GPU?

A

P

112
Q

Which EBS volume type should you use if you need more than 10,000 IOPS.

A

Provisioned IOPS SSD volumes.

113
Q

Are security groups stateless?

A

No.

114
Q

True or False: On-demand instances are recommended for users that want to receive a discounted rate for up-front payment.

A

False. Reserved instances are recommended for that.

115
Q

What does EFS stand for?

A

Elastic File System.

116
Q

You can have (1|multiple) security groups attached to EC2 instances.

A

Multiple.

117
Q

To move an EC2 volume from one AZ/Region to another, take a snap or image of it, then __________.

A

Copy it to the new AZ/Region.

118
Q

True or False: You can mount one EBS volume to multiple EC2 instances.

A

False. You can only mount an EBS volume on a single EC2 instance.

119
Q

True or False: Spot instances are recommended for apps that have flexible start and end times.

A

True.

120
Q

Which EC2 instance is optimized for high-speed storage?

A

I

121
Q

True or False: A single security group can cover any number of EC2 instances.

A

True.

122
Q

When you terminate your spot instance early, who pays for the hour of compute time?

A

You do.

123
Q

What are the different pricing options for EC2 instances?

A
  1. On-demand instances
  2. Spot instances
  3. Reserved instances
  4. Dedicated hosts
124
Q

Which EBS volume type is recommended for big data, data warehouses, or log processing?

A

Throughput-optimized HDD volumes.

125
Q

Which EC2 pricing option allows you to pay for compute capacity per hour (or per second, for Linux instances)?

A

On-demand instances.

126
Q

What EC2 pricing option allows you to bid whatever price you want for instance capacity?

A

Spot instances.

127
Q

Which EC2 instance type is designed for general purposes?

A

M

128
Q

True or False: With security groups, if you create an inbound rule allowing traffic, the security group will automatically allow that traffic out again.

A

True.

129
Q

True or False: An EC2 instance can only be covered by a single security group.

A

False.

130
Q

What are the different types of SSD EBS volumes?

A
  • General purpose SSD (GP2)
  • Provisioned IOPS SSD (IO1)
131
Q

Can security groups be used to block specific IP addresses?

A

No. Use NACLs for that.

132
Q

What is a security group?

A

A virtual firewall.

133
Q

True or False: Reserved instances are recommended for apps with short-term, spiky workloads that cannot be interrupted.

A

False. On-demand instances are recommended for that.

134
Q

Which EC2 instance is optimized for graphics?

A

G

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