Oracle Entry-Level Interview Questions October 7, 2024September 15, 2024 by AJ Oracle Entry-Level Interview Questions Here is a quick and informal assessment quiz to evaluate the foundational knowledge and skills of candidates aspiring to start their careers in Oracle technologies. This assessment focuses on core database concepts, SQL proficiency, and an understanding of Oracle tools. Let's get right at it! 1 / 20 Which of the following components comprise an Oracle architecture? Database related background processes Tablespaces Datafiles All of the above-mentioned 2 / 20 What is the result of the following ‘ORA’NULL’CLE’? Error ORACLE NULL ORA CLE 3 / 20 Which of these are temporal data types? Sum datatype, Count datatype, and Average datatype Date datatype, Time stamp datatype, Interval datatype Join datatype, Equi datatype, Inner datatype Sub query, Sub joins, and Cross joins 4 / 20 Which of the following is correct in this scenario? The user can not create tables The user can create tables The user cannot query any tables None of the Mentioned 5 / 20 Which of the following is a disadvantage of the Oracle database? Cost Complexity Difficult to manage All of the above 6 / 20 When you join two or more tables, views, or materialized views, you combine ____ from both tables, views, or materialized views. Columns Rows Both A and B None of the above 7 / 20 Which processes is an instance made of Oracle? Memory processes Oracle background processes Data processes All of the Mentioned 8 / 20 Which of the following is record based logical model? Object oriented model Network Model E-R Model None of the above 9 / 20 You can add a datafile to a tablespace by using the ALTER TABLESPACE ADD DATAFILE SIZE; statement. True or False? True False 10 / 20 Which of the following is referred to as the language used application programs to request data from the DBMS? Query language DDL DML None of the above 11 / 20 The NVL function is used to replace NULL values with another or given value? True False 12 / 20 ________ are generally executed in the form of subqueries where rows are picked up only from the first (left) table concerning a condition (or a set of conditions) that is matched in the second table. Anti-Join Query Semi-Join Query Natural Join Outer Join 13 / 20 Which of these is not a type of backup in Oracle? COLD Backup FILE Backup HOT Backup RMAN Backup 14 / 20 The size and content of the PGA (Program Global Area) are independent of the Oracle server options installed. True or False? True False 15 / 20 Which of the following areas of PGA stores binding variables and run-time buffers information? Stack space Private SQL area Session area SQL area 16 / 20 What is the result of the following "ORA’NULL’CLE"? ORA CLE ORACLE NULL ERROR 17 / 20 Which of the following statements is not an advantage of bind variables? Bind variables also protect against SQL injection attacks, require minimal maintenance, and reduce memory usage. Bind variables improve performance through caching and reusing, reducing the need for parsing Bind variables uses heuristics or rules of thumb and statistics to decide on the most efficient execution plan based on available indexes, table size, and query complexity. Non of the above. 18 / 20 Which of the following is correct about Oracle? OracleDB is another name for it Oracle is a relational database management system Oracle was built in 1977 All of the above-mentioned 19 / 20 Which of the following commands is used to obtain the structure of an Oracle table? STRUCTURE [TableName]. DESCRIBE STRUCTURE [TableName]. DESC TABLE [TableName]. DESCRIBE [TableName]. 20 / 20 What is the result of the following "ORA’NULL’CLE"? ORA CLE ORACLE NULL ERROR Your score isThe average score is 0% 0% Restart quiz
