1Z1-888 Exam Dumps - PDF Questions and Testing Engine
1Z1-888 Dumps - The Sure Way To Pass Exam
Aim of the Certificate Exam
The certification exam is designed to help the candidate excel and command his future progression. It is designed to
- Differentiate individual in a crowded job market
- Empower individuals to execute tasks with confidence and skill
- Provide individuals with a mark of excellence that is extremely recognized by the clients and seeks within across the industries
Brief Details
Following are the quick details related to the Oracle 1z0-888 Certification Exam
Exam Registration: Candidates willing to appear for the exam have to purchase the exam voucher. Post purchasing the voucher, the candidate can register for the examination on Oracle Education Portal
Pass Score: 58%
Exam Mode: Online Proctored Exam. Candidates can take the examination from any place at any time as per their convenience. Candidates also have the option to give exams at any of the authorized training centers. Candidates can select the exam mode based on their convenience at the time of registration.
Exam Voucher: Candidates can purchase the exam vouchers on Oracle Education Portal. Voucher is valid for 6 months from the date of issue and is like a gift voucher which will get forfeited if not used within 6 months.
Exam Price: $245 (USD) Price may vary for a country based on the localized currency rates
Exam Name: MySQL 5.7 Database Administrator
Exam type: Multiple Choice Questions
Duration: 120 minutes
Topics to Cover
Oracle 1z0-888 certification exam is based on the learnings, key topics, and activities encountered during oracle pieces of training and implementations.
Following are the major topics along with the sub-skills, a candidate should cover while preparing for the examination. These topics will give the candidates a clear view of which topics and skills inclusive, one should focus on for the certification.
Note: The list and details are not an all-inclusive content list. Oracle reserves the right to change and update the content (topics and sub-skills) at any point in time.
Backup Strategy Understanding of system backup processes Ability to create a backup strategy Knowledge of MySQL backup tools and its usage techniques Explain raw backup methods Knowledge of binary logs and their usage
Configure Replication Topology Replicate Conflicts Explain Replication Configure Replication Use MySQL Utilities Identify Replication Threads Monitor Replication Troubleshoot Replication
Maintaining a Stable System Knowledge of system stability Ability to use capacity planning Ability to troubleshoot the system Ability to identify and rectify the causes of server slowdowns Knowledge of InnoDB Recovery
Monitoring MySQL Monitor MySQL using Log Files, Status Variables and Performance Schema
MySQL Security Ability to identify security risks Knowledge of network security Ability to use password security Knowledge of operating system security Ability to Protect SQL Injections
Optimizing Query Performance Ability to identify slow queries Knowledge of EXPLAIN statement Ability to work with Indexes Ability to Use Index Statistics
Configuring MySQL Knowledge of server options, variables, and the command line and using the same in configuring MySQL Ability to define option files Knowledge of using system variables
The candidate needs to go through and be proficient in every topic.
NEW QUESTION 87
You are investigating the performance of a query which selects data from an InnoDB table.
Consider this Performance Schema diagnostics output for the query:
Which statement is true about the output?
- A. The query did not find its table in the table definition cache.
- B. The time the query took is the sum of all timer_waitvalues.
- C. The event with event_id = 8945is a child of the event with event_id=8944.
- D. The query read data from the data file rather than directly from the buffer pool.
Answer: A
NEW QUESTION 88
Consider the CHECK TABLE command.
In which two situations should this command be used? (Choose two.)
- A. to make sure that no table indexes are corrupted
The CHECK TABLE statement performs an integrity check on table structure and contents. It works for MyISAM and InnoDB tables. For MyISAM tables, it also updates the index statistics. If the table is a view, CHECK TABLE verifies the view definition. If the output from CHECK TABLE indicates that a table has problems, the table should be repaired. - B. to repair table structure problem
- C. to make sure a table has no structural problems
- D. to improve performance by updating index distributing statistics on InnoDB tables
- E. to find out why a query takes a long time to execute on a given table
Answer: A,C
NEW QUESTION 89
A crucial database, `db_prod', just disappeared from your production MySQL instance. In reviewing the available MySQL logs (General, Audit, or Slow) and your own application-level logs, you identified this command from a customer facing application:
SELECT id FROM users WHERE login='payback!';DROP DATABASE db_prod;' Which three methods could have been used to prevent this SQL injection attack from happening?
- A. using SSL/TLS on your outward facing web servers (https://) to encrypt all user sessions
- B. validating all user input before sending it to the database server
- C. changing all passwords for the MySQL account `root'@'%' immediately after losing an employee who knew the current password
- D. removing any remaining anonymous accounts from your MySQL instance
- E. using a hashing or encryption method to secure all user passwords in your MySQL tables
- F. giving limited privileges to accounts used by application servers to interact with their backing databases
- G. writing your client code to properly escape all user input
Answer: C,D,E
NEW QUESTION 90
You are using the Performance Schema to investigate replication on a slave which has a single master. The option slave-parallel-typeis set to DATABASE.
Assume that all instruments and consumers are enabled and all threads are instrumented.
Which two facts can be concluded from the given output? (Choose two.)
- A. THREAD_ID 21has stopped running.
- B. At most, two schemas are being updates concurrently.
- C. The slave is configured with slave_parallel_workers= 4
- D. The server needs more cores to use all slave threads.
- E. The slave cannot process the relay log fast enough to use all threads.
- F. The slave has two intermediate relay slaves connected to it.
Answer: C,E
NEW QUESTION 91
You are using the Performance Schema to investigate replication on a slave which has a single master. The option slave-parallel-typeis set to DATABASE.
Assume that all instruments and consumers are enabled and all threads are instrumented.
Which two facts can be concluded from the given output? (Choose two.)
- A. THREAD_ID 21has stopped running.
- B. At most, two schemas are being updates concurrently.
- C. The slave is configured with slave_parallel_workers= 4
- D. The server needs more cores to use all slave threads.
- E. The slave cannot process the relay log fast enough to use all threads.
- F. The salve has two intermediate relay slaves connected to it.
Answer: C,E
NEW QUESTION 92
An employee cannot access the company database. You check the connection variables:
A look at the user privileges shows:
What is a valid for why one of the users is unable to connect to the database?
- A. Joe has exceeded the max_user_connections global limit.
- B. connect_timeout is too small to allow a connection to occur.
- C. All users are blocked because max_user_connections is accumulated over the host account information.
- D. Kay is already connected elsewhere and attempting to log in again.
- E. Bob has max_user_connections set to zero, which blocks all his connections.
Answer: A
NEW QUESTION 93
Examine the mydatatable and SELECTstatements:
You issue:
mysql> begin;
mysql> update mydata set a=0 where b=3;
How many rows are now protected by locks with the default InnoDB configuration?
- A. one
- B. one row and a next-key lock for supremum
- C. five
- D. one row and a gap-lock
Answer: C
NEW QUESTION 94
The InnoDB tablespace is corrupted and you start the server with option --innodb_force_recover=4.
Which backup method would you use to reload the corrupted InnoDB tables?
- A. A text backup. InnoDB does not allow you to make binary backups while the server is running.
- B. A text backup. A binary backup will still contain the corrupted segments.
- C. a binary backup taken with MySQL Enterprise Backup that can back up even corrupted tables
- D. a binary backup that uses transportable tablespaces and allows you to reload a corrupted table
Answer: A
Explanation:
An innodb_force_recovery setting of 4 or greater places InnoDB in read-only mode.
Reference: https://dev.mysql.com/doc/refman/8.0/en/forcing-innodb-recovery.html
NEW QUESTION 95
Consider the index information for the dept_emptable in the employee's schema:
Which two conclusions can be made based on the output of the query? (Choose two.)
- A. The secondary indexes are optimized for unique key look-ups.
- B. There is a redundant index on the emp_nocolumn.
- C. There are three indexes on the table.
- D. The selectivity of the dept_nocolumn is the best of the indexed columns.
- E. The values on the emp_nocolumn must be unique.
- F. There is a redundant index on the dept_nocolumn.
Answer: A,B
NEW QUESTION 96 
What does the possible_keys column in this output denote?
- A. whether you are using any indexes in your query
- B. if it is possible for you to include any indexes in your query
- C. whether there are any indexes on the tables that you are querying
- D. if there are any indexes that may be used to solve this query
Answer: B
NEW QUESTION 97
You have a MySQL replication setup and you intentionally stop the SQL thread on the slave.
What are two reasons that you may stop the SQL thread on the slave while keeping the I/O thread running?
- A. to allow a backup to be created under reduced load
- B. to allow for point-in-time recovery on the slave
- C. to prevent schema changes from propagating to the slave before they are validated
- D. to allow the remaining events to be processed on the slave while not receiving new events from the master
- E. to prevent any transaction experiencing a deadlock
Answer: A,B
NEW QUESTION 98
An administrator installs MySQL to run under a mysql OS account. The administrator decides to disable logins to the mysql account by using /nologin or /bin/false as the user's shell setting.
Which statement is true?
- A. This prevents creation of a command shell with the mysql account, while allowing mysqld to run.
- B. This prevents mysqld from starting when standard startup scripts are used.
- C. The OS needs to allow logging in as mysql so that administrative tasks can be performed.
- D. The mysql user needs a login and its home directory must be the base directory of the installation.
Answer: D
NEW QUESTION 99
Consider that local disk files are accessible via MySQL with commands such as:
mysql> LOAD DATA LOCAL INFILE '/etc/passwd' INTO TABLE mypasswords;
What change could be made to stop any breach via this insecurity?
- A. setting the --open-files-limit=0 option when starting mysqld
- B. executing REVOKE FILE FROM *.*
- C. executing REVOKE FILE ON *.* FROM ' ' @'%'
- D. executing REVOKE LOAD FROM *.*
- E. setting the --local-service=0 option when starting mysqld
- F. setting the --local-infile=0 option when starting mysqld
Answer: A
NEW QUESTION 100
Which two statements are true about InnoDB auto-increment locking? (Choose two.)
- A. InnoDB always protects auto-increment updates with a table-level lock
- B. InnoDB never uses table-level locks.
- C. InnoDB does not use locks to enforce auto-increment uniqueness.
- D. The auto-increment lock can be a table-level lock.
- E. Some settings for innodb_autoinc_lock_mode can help reduce locking.
Answer: D,E
NEW QUESTION 101
Examine the mysqldumpslow output:
Which two options could explain the slow query? (Choose two.)
- A. A full table scan is being used.
- B. No index has been defined on the filtered column.
- C. There are 108 queries still being executed.
- D. A table lock is causing delays.
- E. There is network congestion between client and server.
Answer: A,E
NEW QUESTION 102
You have a server that has very limited memory but has a very large table.
You will use mysqldump to back up this table.
Which option will ensure mysqldump will process a row at a time instead of buffering a set of rows?
- A. --single-transaction
- B. --tab
- C. --quick
- D. --skip-buffer
Answer: C
Explanation:
Reference:
http://dev.mysql.com/doc/refman/4.1/en/mysqldump.html
NEW QUESTION 103
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