050-720

050-720 practice questions, page 2 of 6, with answer review and explanations.

Question 6

Which statement about symmetric encryption is correct?

  1. The same key is used for encryption and decryption.
  2. Symmetric keys are generally longer than asymmetric keys.
  3. Asymmetric encryption is generally faster than symmetric encryption.
  4. A public key and a private key are needed for symmetric encryption/decryption.

Question 7

After the partitions are checked and the root file system is mounted, the /sbin/init command is executed. Which process ID is assigned to /sbin/init?

  1. 0
  2. 1
  3. 3
  4. 100
  5. 1000
  6. Depends

Question 8

When you connect to an ssh server with your ssh client, the public key of the server is compared to the keys stored in a file on the client computer. Which file is this?

  1. ~/.ssh/id_dsa.pub
  2. ~/.ssh/id_rsa.pub
  3. ~/.ssh/known_hosts
  4. ~/.ssh/authorized_keys

Question 9

You want to install the xyz-software-1.2.3-5.i586.rpm package, but only if a previous version is already installed. Which command will do this?

  1. rpm -ivh xyz-software-1.2.3-5.i586.rpm
  2. rpm -evh xyz-software-1.2.3-5.i586.rpm
  3. rpm -Fvh xyz-software-1.2.3-5.i586.rpm
  4. rpm -Uvh xyz-software-1.2.3-5.i586.rpm

Question 10

Which commands can be used if you do not find the desired information in a manual page, or find no manual page at all for a program?

  1. sos program
  2. info program
  3. help program
  4. wiki program