AWS Certification Preparation: AWS IAM Facts, Faqs, Summaries and Top 10 Questions and Answers Dump
AWS IAM Facts and summaries, AWS IAM Top 10 Questions and Answers Dump
Definition 1:
IAM is a framework of policies and technologies for ensuring that the proper people in an enterprise have the appropriate access to technology resources. IdM systems fall under the overarching umbrella of IT security and Data Management .
Definition 2:
AWS Identity and Access Management (IAM) is a web service that helps you securely control access to AWS resources. You use IAM to control who is authenticated (signed in) and authorized (has permissions) to use resources.
AWS IAM Facts and summaries





- You can use AWS IAM to securely control individual and group access to your AWS resources. You can create and manage user identities (“IAM users”) and grant permissions for those IAM users to access your resources. You can also grant permissions for users outside of AWS ( federated users).
- How do users call AWS services?
Users can make requests to AWS services using security credentials. Explicit permissions govern a user’s ability to call AWS services. By default, users have no ability to call service APIs on behalf of the account. - What kinds of security credentials can IAM users have?
IAM users can have any combination of credentials that AWS supports, such as an AWS access key, X.509 certificate, SSH key, password for web app logins, or an MFA device. - What is the access level for newly created regular users in AWS?
Default deny to all resources and actions
By default, all new AWS users lack ANY access to AWS resources with a default deny. That default deny doesn’t prevent an explicit allow to grant them access. Keep in mind that EXPLICT denys override explicit allows.
What is identity federation?
AWS Identity and Access Management (IAM) supports identity federation for delegated access to the AWS Management Console or AWS APIs. With identity federation, external identities are granted secure access to resources in your AWS account without having to create IAM users. These external identities can come from your corporate identity provider (such as Microsoft Active Directory or from the AWS Directory Service) or from a web identity provider (such as Amazon Cognito, Login with Amazon, Facebook, Google, or any OpenID Connect-compatible provider).
Does AWS IAM support SAML?
Yes, AWS supports the Security Assertion Markup Language (SAML) 2.0.
What SAML profiles does AWS support?
The AWS single sign-on (SSO) endpoint supports the IdP-initiated HTTP-POST binding WebSSO SAML Profile. This enables a federated user to sign in to the AWS Management Console using a SAML assertion. A SAML assertion can also be used to request temporary security credentials using the AssumeRoleWithSAML API. For more information, see About SAML 2.0-Based Federation.
- Can a temporary security credential be revoked prior to its expiration?
No. When requesting temporary credentials, we recommend the following:- When creating temporary security credentials, set the expiration to a value that is appropriate for your application.
- Because root account permissions cannot be restricted, use an IAM user and not the root account for creating temporary security credentials. You can revoke permissions of the IAM user that issued the original call to request it. This action almost immediately revokes privileges for all temporary security credentials issued by that IAM user
- Can I reactivate or extend the expiration of temporary security credentials?
No. It is a good practice to actively check the expiration and request a new temporary security credential before the old one expires. This rotation process is automatically managed for you when temporary security credentials are used in roles for EC2 instances.
What does a policy look like?
The following policy grants access to add, update, and delete objects from a specific folder, example_folder, in a specific bucket, example_bucket.- What is the IAM policy simulator?
The IAM policy simulator is a tool to help you understand, test, and validate the effects of your access control policies. - What can the policy simulator be used for?
You can use the policy simulator in several ways. You can test policy changes to ensure they have the desired effect before committing them to production. You can validate existing policies attached to users, groups, and roles to verify and troubleshoot permissions. You can also use the policy simulator to understand how IAM policies and resource-based policies work together to grant or deny access to AWS resources. - Is there an authentication API to verify IAM user sign-ins?
No. There is no programmatic way to verify user sign-ins. - Can users SSH to EC2 instances using their AWS user name and password?
No. User security credentials created with IAM are not supported for direct authentication to customer EC2 instances. Managing EC2 SSH credentials is the customer’s responsibility within the EC2 console. - Are IAM actions logged for auditing purposes?
Yes. You can log IAM actions, STS actions, and AWS Management Console sign-ins by activating AWS CloudTrail. To learn more about AWS logging, see AWS CloudTrail. - What is AWS MFA?
AWS multi-factor authentication (AWS MFA) provides an extra level of security that you can apply to your AWS environment. You can enable AWS MFA for your AWS account and for individual AWS Identity and Access Management (IAM) users you create under your account.
What problems does IAM solve?
IAM makes it easy to provide multiple users secure access to your AWS resources. IAM enables you to:
Manage IAM users and their access: You can create users in AWS’s identity management system, assign users individual security credentials (such as access keys, passwords, multi-factor authentication devices), or request temporary security credentials to provide users access to AWS services and resources. You can specify permissions to control which operations a user can perform.
Manage access for federated users: You can request security credentials with configurable expirations for users who you manage in your corporate directory, allowing you to provide your employees and applications secure access to resources in your AWS account without creating an IAM user account for them. You specify the permissions for these security credentials to control which operations a user can perform.
- What is an IAM role?
An IAM role is an IAM entity that defines a set of permissions for making AWS service requests. IAM roles are not associated with a specific user or group. Instead, trusted entities assume roles, such as IAM users, applications, or AWS services such as EC2. - What problems do IAM roles solve?
IAM roles allow you to delegate access with defined permissions to trusted entities without having to share long-term access keys. You can use IAM roles to delegate access to IAM users managed within your account, to IAM users under a different AWS account, or to an AWS service such as EC2.
Top
Reference: AWS IAM FaqsAWS IAM Top 10 Questions and Answers Dump
Q0: What are the main benefits of IAM groups? (Select two)
- A. The ability to create custom permission policies.
- B. Assigning IAM permission policies to more than one user at a time.
- C. Easier user/policy management.
- D. Allowing EC2 instances to gain access to S3.
TopQ1: You would like to use STS to allow end users to authenticate from third-party providers such as Facebook, Google, and Amazon. What is this type of authentication called?
- A. Web Identity Federation
- B. Enterprise Identity Federation
- C. Cross-Account Access
- D. Commercial Federation
TopQ2:
IAM Policies, at a minimum, contain what elements?- A. Id
- B. Sid
- C. Actions
- D. Effects
- E. Principals
- F. Resources
TopQ3: What are benefits of using AWS STS?
- A. Grant access to AWS resources without having to create an IAM identity for them
- B. Since credentials are temporary, you don’t have to rotate or revoke them
- C. Temporary security credentials can be extended indefinitely
- D. Temporary security credentials can be restricted to a specific region
Q4: Your mobile application includes a photo-sharing service that is expecting tens of thousands of users at launch. You will leverage Amazon Simple Storage Service (S3) for storage of the user Images, and you must decide how to authenticate and authorize your users for access to these images. You also need to manage the storage of these images. Which two of the following approaches should you use? Choose two answers from the options below
- A. Create an Amazon S3 bucket per user, and use your application to generate the S3 URL for the appropriate content.
- B. Use AWS Identity and Access Management (IAM) user accounts as your application-level user database, and offload the burden of authentication from your application code.
- C. Authenticate your users at the application level, and use AWS Security Token Service (STS)to grant token-based authorization to S3 objects.
- D. Authenticate your users at the application level, and send an SMS token message to the user. Create an Amazon S3 bucket with the same name as the SMS message token, and move the user’s objects to that bucket.
TopQ5: You’ve developed a Lambda function and are now in the process of debugging it. You add the necessary print statements in the code to assist in the debugging. You go to Cloudwatch logs , but you see no logs for the lambda function. Which of the following could be the underlying issue for this?
- A. You’ve not enabled versioning for the Lambda function
- B. The IAM Role assigned to the Lambda function does not have the necessary permission to create Logs
- C. There is not enough memory assigned to the function
- D. There is not enough time assigned to the function
Q6: Your application must write to an SQS queue. Your corporate security policies require that AWS credentials are always encrypted and are rotated at least once a week.
How can you securely provide credentials that allow your application to write to the queue?- A. Have the application fetch an access key from an Amazon S3 bucket at run time.
- B. Launch the application’s Amazon EC2 instance with an IAM role.
- C. Encrypt an access key in the application source code.
- D. Enroll the instance in an Active Directory domain and use AD authentication.
TopQ65: A corporate web application is deployed within an Amazon VPC, and is connected to the corporate data center via IPSec VPN. The application must authenticate against the on-premise LDAP server. Once authenticated, logged-in users can only access an S3 keyspace specific to the user. Which of the solutions below meet these requirements? Choose two answers How would you authenticate to the application given these details? (Choose 2)
- A. The application authenticates against LDAP, and retrieves the name of an IAM role associated with the user. The application then calls the IAM Security Token Service to assume that IAM Role. The application can use the temporary credentials to access the S3 keyspace.
- B. Develop an identity broker which authenticates against LDAP, and then calls IAM Security Token Service to get IAM federated user credentials. The application calls the identity broker to get IAM federated user credentials with access to the appropriate S3 keyspace
- C. Develop an identity broker which authenticates against IAM Security Token Service to assume an IAM Role to get temporary AWS security credentials. The application calls the identity broker to get AWS temporary security credentials with access to the app
- D. The application authenticates against LDAP. The application then calls the IAM Security Service to login to IAM using the LDAP credentials. The application can use the IAM temporary credentials to access the appropriate S3 bucket.
TopQ7:
A corporate web application is deployed within an Amazon VPC, and is connected to the corporate data center via IPSec VPN. The application must authenticate against the on-premise LDAP server. Once authenticated, logged-in users can only access an S3 keyspace specific to the user. Which of the solutions below meet these requirements? Choose two answers
How would you authenticate to the application given these details? (Choose 2)- A. The application authenticates against LDAP, and retrieves the name of an IAM role associated with the user. The application then calls the IAM Security Token Service to assume that IAM Role. The application can use the temporary credentials to access the S3 keyspace.
- B. Develop an identity broker which authenticates against LDAP, and then calls IAM Security Token Service to get IAM federated user credentials. The application calls the identity broker to get IAM federated user credentials with access to the appropriate S3 keyspace
- C. Develop an identity broker which authenticates against IAM Security Token Service to assume an IAM Role to get temporary AWS security credentials. The application calls the identity broker to get AWS temporary security credentials with access to the app
- D. The application authenticates against LDAP. The application then calls the IAM Security Service to login to IAM using the LDAP credentials. The application can use the IAM temporary credentials to access the appropriate S3 bucket.
TopQ8:
- A.
- B.
- C.
- D.
TopQ9:
- A.
- B.
- C.
- D.
TopQ10:
- A.
- B.
- C.
- D.
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- A study of 118 observational studies, based upon around a million patients with a wide range of cancers, finds that taking a daily low-dose (75 or 81 mg/day) of aspirin was associated with a 20% reduction in deaths from cancer and in deaths from all causesby /u/giuliomagnifico on December 5, 2023 at 12:05 pm
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- Researchers develop a blood test to identify individuals at risk of developing Parkinson’s diseaseby /u/giuliomagnifico on December 5, 2023 at 11:20 am
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- Human behavior guided by fast subsecond changes in dopamine levels, finds a new study that measured intracranial dopamine levels in the human brain while participants played a computer game during deep brain stimulation surgery.by /u/mvea on December 5, 2023 at 10:31 am
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- Stimulating nerves connected to the pancreas regenerates insulin-producing cells - a new study found that stimulating autonomic vagal nerves connected to the pancreas can improve the function and also increase the number of pancreatic β-cells in mice.by /u/mvea on December 5, 2023 at 10:25 am
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- Adversity accelerates epigenetic aging in children with developmental delays, but positive parenting can reverse course and lead to lower levels of accelerated biological aging.by /u/mvea on December 5, 2023 at 10:20 am
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- Marine life turned off by swimming in plastic chemicals. Research found once the animals were exposed to a chemical, they would break apart from their mate and take much longer -in some cases days - to repair, and sometimes not at all.by /u/Wagamaga on December 5, 2023 at 10:15 am
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- New theory seeks to unite Einstein’s gravity with quantum mechanicsby /u/Rear-gunner on December 5, 2023 at 7:04 am
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- Elevated levels of fine particulate matter (PM 2.5) are linked to increased cardiovascular disease (CVD) mortality rates. Additionally, the association between PM 2.5 concentration and CVD mortality is stronger in rural areas compared to urban areasby /u/Helen_127 on December 5, 2023 at 2:00 am
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- Health-related quality of life is linked to the gut microbiome in kidney transplant recipientsby /u/viomelifesciences on December 5, 2023 at 12:19 am
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- Climate change may push some mammals to shrink by as much as 21% by 2100, as warmer temperatures favor animals with smaller bodies that can more easily shed heat, according to a new study.by /u/JonathanLambertTM on December 4, 2023 at 8:09 pm
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- New research provides evidence that heightened variability in sleep patterns, rather than just average sleep duration, is significantly associated with cognitive impairment in older adults.by /u/chrisdh79 on December 4, 2023 at 7:52 pm
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- Eternal sunshine of the aging mind. Our minds wander less as we age and, when older adults do let their minds drift, they’re more likely to be distracted by pleasant thoughts rather than worries.by /u/Wagamaga on December 4, 2023 at 4:18 pm
submitted by /u/Wagamaga [link] [comments]
Health Health, a science-based community to discuss health news and the coronavirus (COVID-19) pandemic
- Targeted Cancer Drugs Finally Live Up to the Hypeby /u/bloombergopinion on December 5, 2023 at 4:53 pm
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- Reproductive startup launches test to identify an embryo’s genetic defects before an IVF pregnancy beginsby /u/cnbc_official on December 5, 2023 at 3:49 pm
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- The free version of ChatGPT may provide false answers to questions about drugs, new study findsby /u/Sariel007 on December 5, 2023 at 3:23 pm
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- The free version of ChatGPT may provide false answers to questions about drugs, new study findsby /u/Sariel007 on December 5, 2023 at 3:23 pm
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- Eating disorder hospitalizations among boys increased 416 per cent over 17 years: Canadian studyby /u/CTVNEWS on December 5, 2023 at 1:13 pm
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- Patients expected Profemur artificial hips to last. Then they snapped in half.by /u/CBSnews on December 5, 2023 at 12:42 pm
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- Experts unlink Ohio's White Lung Syndrome and China's child pneumoniaby /u/intengineering on December 5, 2023 at 10:53 am
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- Black Americans expect to face racism in the doctor's office, survey findsby /u/Maxcactus on December 5, 2023 at 10:40 am
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- 'Walking pneumonia' epidemics reported in parts of Europe. What is it?by /u/euronews-english on December 5, 2023 at 10:37 am
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- Catholic Church-run hospitals take down crucifixes to prevent attacks on staffby /u/davster39 on December 4, 2023 at 11:33 pm
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- Las Vegas hospitals discharge patients to homless shelters, unregulated facilitiesby /u/jms1225 on December 4, 2023 at 5:30 pm
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- Wasabi, beloved on sushi, linked to "really substantial" boost in memory, Japanese study findsby /u/CBSnews on December 4, 2023 at 5:17 pm
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- 'Find a way to make this happen': Phoenix planned homeless shelter on land contaminated for decadesby /u/jms1225 on December 4, 2023 at 4:04 pm
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- Promotional techniques on junk food packaging are a problem for children's health – Australia could do betterby /u/Randomlynumbered on December 3, 2023 at 5:41 pm
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- Why elderly men have the highest rates of suicidesby /u/zsreport on December 3, 2023 at 5:00 pm
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- Severe outbreak tied to cantaloupe sickens 117 in 34 states; half hospitalizedby /u/Sariel007 on December 3, 2023 at 3:49 pm
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- Cold weather: What does an unheated room do to your body? - BBC Newsby /u/chilladipa on December 3, 2023 at 3:15 pm
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- Mass General-Developed Brain Care Score (BCS) is a Scientifically Validated Way to Assess Current Health Habits and Risk to Future Brain Healthby /u/thinkB4WeSpeak on December 3, 2023 at 7:02 am
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- Some doctors are ditching the scale, saying focusing on weight drives misdiagnosesby /u/Sariel007 on December 2, 2023 at 3:42 pm
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- Lifestyle choices that could lower the risk of all cancersby /u/idc2011 on December 2, 2023 at 1:08 pm
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Today I Learned (TIL) You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.
- TIL, whales can make a poonado up to 100 feet wide to hide themselvesby /u/bu11fr0g on December 5, 2023 at 5:35 pm
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- TIL that in every U.S. state, whoever presses the button on the slot machine wins the wager, which is why in 2017, a man who had his female friend push the slot machine button for good luck did not win anything but she won $100,000.by /u/Forward-Answer-4407 on December 5, 2023 at 5:00 pm
submitted by /u/Forward-Answer-4407 [link] [comments]
- TIL that despite being commonly ranked as one of the worst Christmas films ever made, the 1985 film “Santa Claus: The Movie” is immensely popular in the UK. One of the film actors, John Lithgow, said in 2019 that he wishes he had a nickel for every Englishman who’s told him it's their favorite film.by /u/waitingforthesun92 on December 5, 2023 at 4:24 pm
submitted by /u/waitingforthesun92 [link] [comments]
- TIL of the ultra rare second-generation hybrid offspring of ligers and tigons — the litigon, liliger, tiliger and titigon.by /u/syntactyx on December 5, 2023 at 3:54 pm
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- TIL that only 1 in 10 American adults are eating enough fruits and vegetablesby /u/Stauce52 on December 5, 2023 at 1:29 pm
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- TIL People with B blood type tend to be resistant to most Norovirus strainsby /u/Ottomatic44 on December 5, 2023 at 1:18 pm
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- TIL that long before the Covid-19 pandemic and subsequent lockdowns around the world, Mexico had a 5 day nationwide lockdown in 2009 (with nearly identical rules to those seen during the Covid lockdowns) for the H1N1 swine flu pandemic.by /u/MSchumacher47 on December 5, 2023 at 11:16 am
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- TIL that during WWII, the British MI5 used a "double cross system" to turn German spies into double agents, misleading the Germans about the D-Day invasion's location and timing, which contributed significantly to its success.by /u/App-Enthusiast on December 5, 2023 at 10:06 am
submitted by /u/App-Enthusiast [link] [comments]
- TIL Use of amphetamines (such as Pervitin and Benzedrine) to stay alert and active longer was pretty widely used in WWII by both sides.by /u/StoryAndAHalf on December 5, 2023 at 8:46 am
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- TIL The Burpee exercise was invented by Royal Huddleston Burpee Sr. as a fitness test while completing his Ph.D. in the 1930by /u/MrSilk13642 on December 5, 2023 at 8:17 am
submitted by /u/MrSilk13642 [link] [comments]
- TIL actor Henry Winkler did not actually know how to ride a motorcycle while starring on "Happy Days".by /u/SnarkySheep on December 5, 2023 at 7:38 am
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- TIL dolphins use coral mucus to treat their skin. As they are prone to skin ailment, they would rub their body against the coral before and after their sleep, like human skincare routines. The corals they prefer include bioactive metabolites that can be used for skin medication.by /u/Puzzleheaded-Tax9093 on December 5, 2023 at 6:10 am
submitted by /u/Puzzleheaded-Tax9093 [link] [comments]
- TIL Malignant Hyperthermia is a deadly reaction ( temp as high as 109 f ) to general anesthesia. It's inherited and runs in families. It's the reason anesthesiologists always ask you if anyone in the family had a fatal reaction to anesthesia.by /u/Cultural_Magician105 on December 5, 2023 at 4:33 am
submitted by /u/Cultural_Magician105 [link] [comments]
- TIL that during WWII, Jewish physicist Niels Bohr was smuggled out of Denmark via Sweden to work on the Manhattan project. However, he refused to go to America unless Sweden granted asylum to Denmark’s Jews. 99% of them were saved.by /u/GetYerHandOffMyPenis on December 5, 2023 at 2:05 am
submitted by /u/GetYerHandOffMyPenis [link] [comments]
- TIL that Lucasfilm hired YouTuber Shamook as their Senior Facial Capture Artist after Shamook dropped a deepfake video that went viral because many felt it improved the VFX used to de-age Mark Hamill in Season 2 of The Mandalorian.by /u/tyrion2024 on December 5, 2023 at 1:56 am
submitted by /u/tyrion2024 [link] [comments]
- TIL that Weird Al signs contracts with artists before parodying their music, and they get paid too!by /u/Finding_Plato on December 4, 2023 at 11:26 pm
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- TIL in 2015, the US Department of Defense accidentally mailed live anthrax to several locations in different states. This happened less than year after the CDC had done the same thing.by /u/twentyturin on December 4, 2023 at 9:57 pm
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- TIL Genghis Khan’s empire would eventually become the largest contiguous land empire in history.by /u/StressCanBeHealthy on December 4, 2023 at 8:05 pm
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- TIL Whiplash was originally an 18-minute short film that received acclaim at the Sundance Film Festival, drawing investors to fund the full length film which cost $3.3 million to make and grossed $49 million at the boxoffice.by /u/SingLikeTinaTurner on December 4, 2023 at 7:24 pm
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- TIL “Vincent” by Don McLean was Tupac’s favorite song, and his girlfriend played it as he was dying so it would be the last thing he heardby /u/KodairaLuggage on December 4, 2023 at 6:20 pm
submitted by /u/KodairaLuggage [link] [comments]