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MCQs

Total Questions : 10
Question 1. _________ method clears all keys from the configuration.
  1.    clear
  2.    addResource
  3.    getClass
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> clear


getClass is used to get the value of the name property as a Class.


Question 2. Which of the following storage policy is used for both storage and compute ?
  1.    Hot
  2.    Cold
  3.    Warm
  4.    All_SSD
 Discuss Question
Answer: Option A. -> Hot


When a block is hot, all replicas are stored in DISK.


Question 3. Which of the following is only for storage with limited compute ?
  1.    Hot
  2.    Cold
  3.    Warm
  4.    All_SSD
 Discuss Question
Answer: Option B. -> Cold


When a block is cold, all replicas are stored in ARCHIVE.


Question 4. __________ get events indicating completion (success/failure) of component tasks.
  1.    getJobName()
  2.    getJobState()
  3.    getPriority()
  4.    getTaskCompletionEvents(int startFrom)
 Discuss Question
Answer: Option D. -> getTaskCompletionEvents(int startFrom)


getPriority() provides scheduling info of the job.


Question 5. Which of the following method is used to get user-specified job name ?
  1.    getJobName()
  2.    getJobState()
  3.    getPriority()
  4.    All of the mentioned
 Discuss Question
Answer: Option A. -> getJobName()


getPriority() is used to get scheduling info of the job.


Question 6. In order to turn on RPC authentication in hadoop, set the value of hadoop.security.authentication property to :
  1.    zero
  2.    kerberos
  3.    false
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> kerberos


Security settings need to be modified properly for robustness.


Question 7. The updated queue configuration should be a valid one i.e. queue-capacity at each level should be equal to :
  1.    50%
  2.    75%
  3.    100%
  4.    0%
 Discuss Question
Answer: Option C. -> 100%


Queues cannot be deleted, only addition of new queues is supported.


Question 8. Apache Hadoop YARN stands for :
  1.    Yet Another Reserve Negotiator
  2.    Yet Another Resource Network
  3.    Yet Another Resource Negotiator
  4.    All of the mentioned
 Discuss Question
Answer: Option C. -> Yet Another Resource Negotiator


YARN is a cluster management technology.


Question 9. The __________ provides a proxy between the web applications exported by an application and an end user.
  1.    ProxyServer
  2.    WebAppProxy
  3.    WebProxy
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> WebAppProxy


If security is enabled it will warn users before accessing a potentially unsafe web application. Authentication and authorization using the proxy is handled just like any other privileged web application.


Question 10. Although the Hadoop framework is implemented in Java , MapReduce applications need not be written in :
  1.    Java
  2.    C
  3.    C#
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Java


Hadoop Pipes is a SWIG- compatible C++ API to implement MapReduce applications (non JNITM based).


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