Oracle sql developer unix

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I often get mails from people asking what are the questions generally asked in Weblogic by interviewers. Generally for an Administrator’s positions, in addition to Weblogic questions, there are a lot of Unix questions and a few questions related to process and case handling. These are the important questions that I cover while interviewing. 1. How do you differentiate between a server hang and server crash issue? When a Server crahes, the JAVA process no longer exists. When the Server is hung, it stops responding. We can use the weblogic.ADMIN utilty to ping the server. In case of a hang situation we can take multiple thread dumps and analyze the cause of hang. 2. What can be the various reasons for a server crash? a) Native IO b) SSL Native Libraries c) JVM d) Supported Configuration e) JDBC Driver issue 3. How do you troubleshoot a crash? JVM crash generates a hs_err_pid file. We need to look into the stack trace of the hs_err_pid file . If the thread is from a native io, we need to disable native io. if the stack trace is from the driver, we need to get in touch with the drive team. Quite possibly its a problem with driver. Changing the type of driver can be a workaround. If the thread shows it coming from an optimzed code, we can turn of optimization. If the stack is from native calls of application, its a bug with the application and it has to b modified. 4. Ho do you troubleshoot Server Hang? We can use java weblogic.Admin PING to check if we get a normal response. We need to take multiple thread dumps with kill -3 pid on unix and CTLR Break on Windows. Analyze the thread dump to find the root cause. 5. What can be the reasons of Server hang? Memory leak, databse query taking a long time to return, Deadlock. 6. What is memory leak? Memory leak is when objects are not romved from the heap even when they are not required. 7. What are the various causes for OUT OF MEMORY? a) Insufficient heap size, not able to match the extra load. b) Objects licing too long, like HTTP Sessions. c) Memory leak in application code. d) Full GC not happening due to JVM Bug. 8. How to troubleshoot and overcome such issues? Gather memory data by enabling GC verbose. If its due to Http Session, timing out http session after certain interval might help. Look into the code for jdbc connection handling. Optimizing the heap size according to the load. 9. When does High CPU Usage occur? It occurs when one process or one thread utilizes unexpectedly high proportion of CPU. 10. How to troubleshoot it? In Solaris environment, we need to take pstack and prstack and see what the threads are doing. In Windows we need to use pslist and process explorer. 11. What is Clustering and what is achieved through it? Clustering is the grouping together of servers for the purpose of high availability and scalability. Load balancing and Failover is achieved. 12. How does Cluster Communication Happen? Members of the Cluster communicate over the Cluster Multicast IP and Port by sending periodic heart beat messages. 13. What is the difference between the Sun JVM and BEA JRockit JVM? The most well know JVM is the implementation from Sun. The Sun JVM is called HotSpot. The Sun JVM is shipped in the Java Developer’s Kit (JDK) and Java Runtime Environment (JRE) from Sun. The BEA JRockit JVM from BEA systems is optimized for reliability and performance for server side applications. To achieve this, BEA JRockit JVM uses technologies such as code generation, hot spot detection, code optimization, advanced garbage collection algorithms and tight operating system integration. 14. TUning JVM Parameters. If you have a single processor, single thread machine then you should use the serial collector (default for some configurations, can be enabled explicitly for with -XX:+UseSerialGC). For multiprocessor machines where your workload is basically CPU bound, use the parallel collector. This is enabled by default if you use the -server flag, or you can enable it explicitly with -XX:+UseParallelGC. If you’d rather keep the GC pauses shorter at the expense of using more total CPU time for GC, and you have more than one CPU, you can use the concurrent collector (-XX:+UseConcMarkSweepGC). Note that the concurrent collector tends to require more RAM allocated to the JVM than the serial or parallel collectors for a given workload because some memory fragmentation can occur.

Prerequisites • Dimensional modeling • Basic SQL • Data warehouse design • Database design Target Audience • Business Intelligence Developer • Data Warehouse Administrator • Business Analysts • Data Warehouse Analyst • Data Modelers • Reports Developer • Data Warehouse Developer • Application Developers

We are providing the best training for the ORACLE and also providing best training for certification also with the guidance from working and certified professionals from various companies. We PERIDOT SYSTEMS located at ADYAR is providing this training in various aspects separately for freshers and working professionals. Our syllabus has been designed with the support of various professionals in order to cover all the basic to advanced topics so that they can get 100% technical knowledge that will supports while appearing for certification exams and also for technical interviews. ORACLE Modules: Oracle SQL Oracle PLSQL Oracle DBA These are the modules that we are handling in our institute. Here comes details about the certification with ORACLE. ORACLE Certification: There are two types of certification available for freshers and for professionals as mentioned below, OCA: Oracle Certified Associate OCP: Oracle Certified Professional OCA: This certification is for fresher who wants to build their career as developer in IT. The only eligibility to take this exam is to have a interest with developer track. OCP: This certification is for Professionals. To appear for this examination the person should done their Associate Certification (OCA). About our Institute: Training with Certified experts from top companies 100% job based training Certification training done in your course duration itself Practical based training certification guidance flexible timing minimum batch strength These are the benefits with our institute. Don’t delay contact us today and attend a free demo session with my faculty. We are available at 9566183028 or www.peridotsystems.in

UNIX Interview Questions and Answers UNIX or Linux operating system has become default Server operating system and for whichever programming job you give interview you find some UNIX command interview questions there. These UNIX command interview questions are mostly asked during Java development and Support role interviews on various investment banks mostly because most of electronic trading systems or stock trading system works on Unix servers. As we know that high volume low latency systems which wants to take advantage of little bit of volatility in market for Equity , Futures and options or Foreign exchange trading need a stable server side operating system and Redhat Linux is doing great job there. with the advent of Algorithmic trading this speed factor becomes more important so getting someone who has good knowledge of operating system and commands on which these trading system runs is definitely required. but these UNIX command interview questions are equally applicable for any job interview which requires some work on Unix Operating System. With the growing use of Linux in form of RedHat, Solaris and IBM AIX its must to keep you familiar with essential Linux commands available on various platforms. Unix and Linux Command Interview Questions and AnswersLong back I had once asked one of my friend why are you preparing Unix Command interview questions if you going for a Java Interview and he told me that this job doesn't only require knowledge of Java but also knowledge of Unix, Linux, SQL and other scripting language , which is quite true. After that I thought to collect various UNIX command interview questions asked to Java developers or trading system support interviews and this is the result of that compilation. This list of UNIX command interview questions are by means complete and would be great if you guys contribute some genuine and good Unix Command Interview questions and answers asked during interviews. I have divided the questions on three categories for sake of managing and keeping this list of Unix Interview questions up to date. Read more: http://javarevisited.blogspot.com/2011/05/unix-command-interview-questions.html#ixzz3W1UbYiXn

Duration: 10.5 hours Size: 1.63 GB 1. Database Basics 1. Oracle Database Introduction & Basics of Tables. 2. Setting Up the SQL Development Environment (Mac & Windows). 3. IMPORTANT Prepare the Data in the Database. 3.1 course_data.txt.txt 2. Single Table Queries (Exercises & Solutions in the Lectures) 1. Oracle Exams and Certification Information.html 2. Retrieving Data Using the SELECT Clause. 3. Using the WHERE Clause in a Query. 4. Using Operators in the WHERE Clause. 5. Combining WHERE, AND & OR with Operators. 6. Query Filtering Continued BETWEEN, IN and NULL. 7. Query Filtering Conditions & Operator Precedence. 8. Ordering, Concatenating & Aliasing Query Results. 3. Single Row Functions (Exercises and Solutions In the Lectures) 1. Single Row Functions (SRF) & Using The Dual Table. 2. Using Functions in WHERE And Character Based SRFs. 3. Numeric and Date Data type SRFs. 4. Conversion SRFs & Date Formatting. 5. Some More Date Functions.html 6. Concluding SRFs & NULL NULLIF Functions. 4. Grouping Functions (Exercises and Solutions In the Lectures) 1. Grouping Functions MIN, MAX, AVG, COUNT etc.. 2. GROUP BY Clause & HAVING Clause. 3. More Practice With The GROUP BY Clause. 5. Multi-Table Queries and Joins (Exercises and Solutions In the Lectures) 1. SELECT within SELECT (Subqueries). 2. Relating Tables Together Using JOINs. 3. Joins Continued INNER & OUTER Joins. 4. Correlated Subqueries with EXISTS & NOT EXIST operators. 6. Creating, Altering, and Updating Objects Using SQL (Exercises in Lectures) 1. Creating Your Own Tables & Design Considerations. 10. Views and Other Objects and Commands (Newly Added). 11. SQL could be tricky, check this out!.html 12. Granting and Revoking Privileges. 2. Inserting Data Into Our Table. 3. Create Table With a Primary Key Constraint. 4. Using ALTER to modify the table structure. 5. Create Table with SELECT + UPDATE Data. 7. DELETE, TRUNCATE, and DROP Commands. 8. Working With Database Indexes. 9. System Tables, Pseudo Columns & Deleting Duplicates (Newly Added). Guides PDF Advanced Oracle PL_SQL Developer’s Guide.pdf Beginning Oracle SQL for Oracle Database 12c, 3 edition.pdf.pdf OCA Oracle Database 12c_ SQL Fundamentals I Exam Guide (Exam 1Z0-061).pdf OCA_ Oracle Database 12c Administrator Certified Associate Study Guide_ Exams 1Z0-061 and 1Z0-062.pdf OCP_ Oracle Database 12c Administrator Certified Professional Study Guide_ Exam 1Z0-063.pdf Oracle 12c SQL.pdf creating_other_schema_objects_questions.pdf e47689.pdf subqueries_to_solve_queries_questions.pdf

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Oracle Business Intelligence Enterprise Edition@Sadguru technologies Oracle Business Intelligence Enterprise Edition 11g (OBIEE) is a comprehensive business intelligence platform that delivers a full range of analytic and reporting capabilities. Designed for scalability, reliability, and performance, Oracle Business Intelligence Enterprise Edition 11g delivers contextual, relevant and actionable insight to everyone in an organisation, resulting in improved decision-making, better-informed actions, and more efficient business processes. Oracle also provides the industry’s only multi-sourced BI applications, as well as market-leading performance management applications that are powered by this BI platform. Sadguru Technologies Education is a fast growing Oracle Training company in India, run by a team of well experienced IT Professionals who have worked for years in IT MNCs. Sadguru Technologies Team focuses on delivering High Quality Trainings based on real time expertise especially for Working professionals. Our trainings simulate a live corporate training environment with latest technologies being used in delivering the sessions. Prerequisites • Dimensional modeling • Basic SQL • Data warehouse design • Database design Target Audience • Business Intelligence Developer • Data Warehouse Administrator • Business Analysts • Data Warehouse Analyst • Data Modelers • Reports Developer • Data Warehouse Developer • Application Developers For New Batch Contact Us: Mob: 08179736190 (OR) Mail: SDTECH.SOA@GMAIL.COM Address: SADGURU TECHNOLOGIES H. No: 7-1-621/10, Flat No: 102, Sai Manor Apartment, S.R. Nagar Main Road, Landmark: Beside Umesh Chandra Statue, Hyderabad-500038, Mob: 91-8179736190,Ph: 040-40154733.

Oracle Business Intelligence Enterprise Edition@Sadguru technologies Oracle Business Intelligence Enterprise Edition 11g (OBIEE) is a comprehensive business intelligence platform that delivers a full range of analytic and reporting capabilities. Designed for scalability, reliability, and performance, Oracle Business Intelligence Enterprise Edition 11g delivers contextual, relevant and actionable insight to everyone in an organisation, resulting in improved decision-making, better-informed actions, and more efficient business processes. Oracle also provides the industry’s only multi-sourced BI applications, as well as market-leading performance management applications that are powered by this BI platform. Sadguru Technologies Education is a fast growing Oracle Training company in India, run by a team of well experienced IT Professionals who have worked for years in IT MNCs. Sadguru Technologies Team focuses on delivering High Quality Trainings based on real time expertise especially for Working professionals. Our trainings simulate a live corporate training environment with latest technologies being used in delivering the sessions. Prerequisites • Dimensional modeling • Basic SQL • Data warehouse design • Database design Target Audience • Business Intelligence Developer • Data Warehouse Administrator • Business Analysts • Data Warehouse Analyst • Data Modelers • Reports Developer • Data Warehouse Developer • Application Developers For New Batch Contact Us: Mob: 08179736190 (OR) Mail: SDTECH.SOA@GMAIL.COM Address: SADGURU TECHNOLOGIES H. No: 7-1-621/10, Flat No: 102, Sai Manor Apartment, S.R. Nagar Main Road, Landmark: Beside Umesh Chandra Statue, Hyderabad-500038, Mob: 91-8179736190,Ph: 040-40154733.

Oracle Business Intelligence Enterprise Edition@Sadguru technologies Oracle Business Intelligence Enterprise Edition 11g (OBIEE) is a comprehensive business intelligence platform that delivers a full range of analytic and reporting capabilities. Designed for scalability, reliability, and performance, Oracle Business Intelligence Enterprise Edition 11g delivers contextual, relevant and actionable insight to everyone in an organisation, resulting in improved decision-making, better-informed actions, and more efficient business processes. Oracle also provides the industry’s only multi-sourced BI applications, as well as market-leading performance management applications that are powered by this BI platform. Sadguru Technologies Education is a fast growing Oracle Training company in India, run by a team of well experienced IT Professionals who have worked for years in IT MNCs. Sadguru Technologies Team focuses on delivering High Quality Trainings based on real time expertise especially for Working professionals. Our trainings simulate a live corporate training environment with latest technologies being used in delivering the sessions. Prerequisites • Dimensional modeling • Basic SQL • Data warehouse design • Database design Target Audience • Business Intelligence Developer • Data Warehouse Administrator • Business Analysts • Data Warehouse Analyst • Data Modelers • Reports Developer • Data Warehouse Developer • Application Developers For New Batch Contact Us: Mob: 08179736190 (OR) Mail: SDTECH.SOA@GMAIL.COM Address: SADGURU TECHNOLOGIES H. No: 7-1-621/10, Flat No: 102, Sai Manor Apartment, S.R. Nagar Main Road, Landmark: Beside Umesh Chandra Statue, Hyderabad-500038, Mob: 91-8179736190,Ph: 040-40154733.

Oracle Business Intelligence Enterprise Edition@Sadguru technologies Oracle Business Intelligence Enterprise Edition 11g (OBIEE) is a comprehensive business intelligence platform that delivers a full range of analytic and reporting capabilities. Designed for scalability, reliability, and performance, Oracle Business Intelligence Enterprise Edition 11g delivers contextual, relevant and actionable insight to everyone in an organisation, resulting in improved decision-making, better-informed actions, and more efficient business processes. Oracle also provides the industry’s only multi-sourced BI applications, as well as market-leading performance management applications that are powered by this BI platform. Sadguru Technologies Education is a fast growing Oracle Training company in India, run by a team of well experienced IT Professionals who have worked for years in IT MNCs. Sadguru Technologies Team focuses on delivering High Quality Trainings based on real time expertise especially for Working professionals. Our trainings simulate a live corporate training environment with latest technologies being used in delivering the sessions. Prerequisites • Dimensional modeling • Basic SQL • Data warehouse design • Database design Target Audience • Business Intelligence Developer • Data Warehouse Administrator • Business Analysts • Data Warehouse Analyst • Data Modelers • Reports Developer • Data Warehouse Developer • Application Developers For New Batch Contact Us: Mob: 08179736190 (OR) Mail: SDTECH.SOA@GMAIL.COM

Oracle Business Intelligence Enterprise Edition@Sadguru technologies Designed for scalability, reliability, and performance, Oracle Business Intelligence Enterprise Edition 11g delivers contextual, relevant and actionable insight to everyone in an organisation, resulting in improved decision-making, better-informed actions, and more efficient business processes. Oracle also provides the industry’s only multi-sourced BI applications, as well as market-leading performance management applications that are powered by this BI platform. Sadguru Technologies Education is a fast growing Oracle Training company in India, run by a team of well experienced IT Professionals who have worked for years in IT MNCs. Sadguru Technologies Team focuses on delivering High Quality Trainings based on real time expertise especially for Working professionals. Our trainings simulate a live corporate training environment with latest technologies being used in delivering the sessions. Prerequisites • Dimensional modeling • Basic SQL • Data warehouse design • Database design Target Audience • Business Intelligence Developer • Data Warehouse Administrator • Business Analysts • Data Warehouse Analyst • Data Modelers • Reports Developer • Data Warehouse Developer • Application Developers For New Batch Contact Us: Mob: 08179736190 (OR) Mail: SDTECH.SOA@GMAIL.COM Address: SADGURU TECHNOLOGIES H. No: 7-1-621/10, Flat No: 102, Sai Manor Apartment, S.R. Nagar Main Road, Landmark: Beside Umesh Chandra Statue, Hyderabad-500038, Mob: 91-8179736190,Ph: 040-40154733.

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