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Oracle Essbase Certification
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Interview Questions and Answers

Security can be implemented through user authentication, access control lists (ACLs) at the application and database level, and data encryption.

Common issues include slow performance, data load errors, calculation errors, security problems, and connectivity issues. Debugging tools and log files can be used to diagnose and resolve these problems.

Essbase Studio is a graphical interface used to design, create, and manage Essbase cubes. It provides a user-friendly environment for building and deploying OLAP applications.

BSO (Block Storage Option) cubes are optimized for calculation-intensive applications, while ASO (Aggregate Storage Option) cubes are optimized for fast data retrieval and reporting. BSO is typically used for planning and budgeting, while ASO is used for analytics.

Performance optimization techniques include optimizing formulas, using appropriate dimension densities, tuning database settings, optimizing MDX queries, and regularly performing database maintenance.

Common Essbase functions include @SUM, @AVG, @MIN, @MAX, @ILARGE, @ISMBR, @PARENT, @CHILDREN, @ANCESTORS, @IDESC, @ATTRIBUTE.

Data can be loaded into Essbase using various methods, including data load rules, MaxL scripts, Essbase Integration Services (EIS), and external data sources like relational databases.

A data load rule defines the mapping between an external data source and the Essbase cube. It specifies how data should be transformed and loaded into the appropriate members.

A sparse dimension is one where a large number of possible combinations of members have no data associated with them. Essbase is designed to handle sparse data efficiently, minimizing storage requirements.

A dense dimension is one where most combinations of members have data associated with them. Dense dimensions are stored differently than sparse dimensions for performance optimization.

A stored member is a member whose values are directly stored in the Essbase database. These values are not calculated.

A dynamic calc member is a member whose value is calculated on demand whenever its accessed. The calculation is based on a formula defined for that member.

A shared member is a member that appears in multiple locations within the same dimension hierarchy. This allows for efficient data organization and reporting.

A formula in Essbase defines how a members value is calculated. It can involve mathematical operations, functions, and references to other members or cells in the cube.

MDX (MultiDimensional eXpressions) is a query language used to retrieve and manipulate data in Essbase. Its similar to SQL but designed for multi-dimensional databases.

Hyperion Essbase is an Online Analytical Processing (OLAP) server that provides a multi-dimensional database platform for business intelligence, planning, and reporting. It allows users to analyze large datasets quickly and efficiently.

Key features include multi-dimensional analysis, hierarchical data representation, calculation engine, sparse data optimization, web interface, integration with other BI tools, and collaborative planning capabilities.

An Essbase cube is a multi-dimensional database structure that organizes data based on different dimensions, allowing users to analyze data from various perspectives. Its the central data repository in Essbase.

Dimensions are categories or perspectives used to organize data in an Essbase cube. Common examples include Time, Product, Geography, and Account. They define the axes of analysis.

Members are individual elements within a dimension. For example, in the Time dimension, members could be January, February, March, etc.

Business intelligence includes the strategies and technologies used by enterprises for the data analysis of business information. BI technologies provide historical, current, and predictive views of business operations.

A reporting application goes through three stages: authoring, managing, and delivery.

In general Reporting Services components are of the following types: Report Builder, Report Designer, Report Manager, Report Server, Report server database and Data sources.

You can export the reports to various formats once you have run your report. Tabular reports can be exported to spreadsheets, Text, PDF and HTML. Graphs can also be exported to image files or documents.

BI applications support various activities, such as decision support systems, online analytical processing, querying and reporting, forecasting and data mining, and statistical data analysis.

There are 4 key areas where report generation slowdown may occur: Data refresh, Model calculations, Visualization rendering, Everything else

The database schema of a database is it's structure described in a formal language supported by the database management system (DBMS). The term \"schema\" refers to the organization of data as a blueprint of how the database is constructed (divided into

A data-driven subscription provides a way to use dynamic subscription data that is retrieved from an external data source at run time. A data-driven subscription can also use static text and default values that you determine when the subscription is defin

Universe is a semantic layer that maps complex data into descriptive business terms used across the organization, such as product, customer, region, revenue, margin or costs. This layer resides between an organization's database and the end-user.

OLTP (Online transaction processing) captures, stores, and processes data from transactions in real-time. OLAP (Online analytical process) uses complex queries to analyze aggregated historical data from OLTP systems.

Data Warehouse System is a system used for reporting and data analysis, and is considered a core component of business intelligence. Data Warehouses are central repositories of integrated data from one or more disparate sources.

Snowflak

Slicing and Dicing is about breaking down a body of information into smaller pieces, or analyzing it from various points of view so that you can better understand it. In data analysis, the term usually means a systematic reduction of smaller sections or v

Data masking or data scrambling or data anonymization is the process of replacing sensitive information copied from production databases to test non-production databases with realistic, but scrubbed (eg *, #), data based on masking rules. Sometimes Data

Canned reports, Ad hoc and Batch reports.

Ad hoc reporting is a report created for a one-time-use. A reporting tool can make it possible for anyone in an organization to answer a specific business question and present that data in a visual format. Canned reports are preformatted reports that are

C++, Python, Java, C#, proprietary programming language of the reporting tool, ABAP etc.

The security setup required for Authorization Concepts in reporting needs. The Authorization Concepts are segregated to several different categoriesof users as end-users, developers, production support, testing etc

High-level Categories:

– Fu

Steps to create parameters to dynamically change what you see, and even sort by measurements that do not even have to be seen.

Step 1: Create your first parameter.

Step 2: Create a table calculation to link your parameter to measures.

Step

TRUNCATE always removes all the rows from a table, leaving the table empty and the table structure intact while DELETE may remove conditionally if the where clause is used. The rows deleted by TRUNCATE TABLE statement cannot be restored and you can not sp

The traditional database stores information in a relational model and prioritizes the transactional processing of the data. This is known as an OLTP database. Data warehouses prioritize and gives importance to analysis, and are known as OLAP databases.

Explain with examples keeping in job JD in mind.

Model–view–controller(MVC) is a software design pattern used for developing user interfaces that separate the related program logic into three interconnected elements. Each of these components is built to handle specific development aspects of an applicat

Explain specific instances with respect to the job JD.

(1) Choose the Right Technology when picking up a programming language, Database, Communication Channel.

(2) The ability to run multiple servers and databases as a distributed application over multiple time zones.

(3)Database backup, correcti

Object-oriented programming is a programming paradigm based on the concept of \"objects\", which can contain data, in the form of fields, and code, in the form of procedures. A feature of objects is that objects' own procedures can access and often modify

Most modern development processes can be described as agile. Other methodologies include waterfall, prototyping, iterative and incremental development, spiral development, rapid application development, and extreme programming.

Software Development Life Cycle (SDLC) is a process used to design, develop and test high-quality software. Also referred to as the application development life-cycle.

Software testing is called the process or method of identifying errors in an application or system, such that the application works according to the requirement of end-users. It is an examination carried out to provide users the information on the quality

Explain specific instances with respect to the job JD.

The primary aim of the code review is to ensure that the codebase overall product quality is maintained over time. It helps give a fresh set of eyes to identify bugs and simple coding errors. All of the tools and processes of code review are designed to t

The most common software sizing methodology has been counting the lines of code written in the application source. Another approach is to do Functional Size Measurement, to express the functionality size as a number by performing Function point analysis.

The major parts to project estimation are effort estimation, cost estimation, resource estimate. In estimation, there are many methods used as best practices in project management such as-Analogous estimation, Parametric estimation, Delphi process, 3 Poin

Functional requirements are the specifications explicitly requested by the end-user as essential facilities the system should provide. Non-functional requirements are the quality constraints that the system must satisfy according to the project contract,

Validation is the process of checking whether the specification captures the user's needs, while verification is the process of checking that the software meets the specification.

Different Types Of Software Testing - Unit Testing, Integration Testing, System Testing, Sanity Testing, Smoke Testing, Interface Testing, Regression Testing, Beta/Acceptance Testing.

Quality control can be defined as a \"part of quality management concentrating on maintaining quality requirements.\" While quality assurance relates to how a process is carried out or how a product is produced, quality control is more the quality managem