PL/SQL Interview Questions - Shikshaglobe

PL/SQL Interview Questions

PL/SQL is a procedural language extension to SQL that adds control structures, loops, and other programming constructs. It is used in Oracle Database and other database servers. Questions that are commonly asked in interviews for PL/SQL positions include: What is the difference between SQL and PL/SQL?What are some of the features of PL/SQL?What are some of the benefits of using PL/SQL?What are some of the drawbacks of PL/SQL?How can PL/SQL be used in Oracle Database?PL/SQL is a procedural language extension to SQL that adds functionality such as conditional branching, looping and error-handling.

Click here to learn more

It is commonly used in database programming, and can be embedded in other languages such as C and Java.The most important thing to remember when preparing for a PL/SQL interview is that the interviewer is looking for your ability to think logically and solve problems. They will often give you a scenario and ask you how you would approach it. Other questions may test your knowledge of the language syntax or specific features.PL/SQL is a procedural language extension to SQL that adds functionality such as looping, branching, and other programming constructs. It is one of the most popular languages used by developers working with Oracle databases.If you're preparing for a PL/SQL interview, you may be wondering what sorts of questions you'll be asked.

Click here to find out more

Here are some sample questions that will give you an idea of the types of things you'll need to know:What are some of the differences between PL/SQL and other programming languages?How can PL/SQL be used in application development?What are some guidelines for efficient PL/SQL programming?What are some common errors made when programming in PL/SQL?What are some best practices for debugginPL/SQL is a procedural language extension to SQL that adds functionality such as looping, decision making, and exception handling. PL/SQL is not a standalone language, but rather an extension of SQL. In order to write PL/SQL code, you must have a basic understanding of SQL.The most common PL/SQL interview questions revolve around the topics of cursors, stored procedures, and functions. You should be prepared to answer questions about these topics, as well as general questions about PL/SQL syntax and usage.

 1. What is PL/SQL, and what are its advantages?

Answer: PL/SQL stands for Procedural Language/Structured Query Language. It is an extension of SQL that allows developers to write procedural code, making it more powerful and flexible than regular SQL. The advantages of PL/SQL include improved performance, better code organization through procedures and functions, enhanced security, and reduced network traffic.

2. Differentiate between a stored procedure and a function in PL/SQL.

Answer: The main difference between a stored procedure and a function in PL/SQL lies in their return values. A stored procedure does not return a value, while a function always returns a value. Functions are used when you need to compute and return a single value, whereas procedures are used for executing a series of SQL statements or tasks without returning a value.

3. Explain the EXCEPTION block in PL/SQL and its importance.

Answer: The EXCEPTION block in PL/SQL is used for handling errors or exceptions that may occur during the execution of a block of code. When an exception occurs, the control is transferred to the EXCEPTION block, and appropriate error handling can be implemented. It ensures that the program continues to execute gracefully even in the presence of errors, maintaining the integrity of the application.

Your gateway to success

4. How do you declare variables in PL/SQL?

Answer: In PL/SQL, you can declare variables using the "DECLARE" keyword within a block. The syntax for declaring variables is:

DECLARE

   variable_name data_type [NOT NULL] [:= initial_value];

BEGIN

   -- PL/SQL code

END;

 

5. What is a cursor in PL/SQL, and why is it used?

Answer: In PL/SQL, a cursor is a mechanism used to process individual rows returned by a SQL query. It allows developers to retrieve and manipulate data row by row within a loop. Cursors are used when you need to perform operations on each row of the result set sequentially.

6. Discuss the use of triggers in PL/SQL.

Answer: Triggers in PL/SQL are special types of stored programs that are automatically executed when certain database events occur, such as insert, update, delete, or database startup/shutdown. They are useful for implementing business rules, data validation, and maintaining data integrity.

7. How do you handle exceptions in PL/SQL?

Answer: Exception handling in PL/SQL is achieved using the "EXCEPTION" block. It allows developers to catch specific errors and take appropriate actions, such as logging the error or displaying a user-friendly message. The EXCEPTION block contains the error-handling code and ensures the program continues execution, even if an exception occurs.

8. Explain the difference between "BEFORE" and "AFTER" triggers.

Answer: In PL/SQL, "BEFORE" triggers are fired before the event (e.g., insert, update, delete) occurs, while "AFTER" triggers are fired after the event has occurred. "BEFORE" triggers are commonly used for data validation, and "AFTER" triggers are often used for logging or auditing purposes.

9. How can you pass parameters to a stored procedure or function?

Answer: Parameters can be passed to a stored procedure or function by including them within the parentheses when creating the procedure or function. These parameters act as placeholders for values that will be provided when the procedure or function is called.

10. What is the purpose of the COMMIT statement in PL/SQL?

Answer: The COMMIT statement in PL/SQL is used to permanently save any changes made to the database during a transaction. It makes the changes permanent and releases any locks held on the affected data. If the transaction is successful, the COMMIT statement should be executed to make the changes permanent.

11. Describe the concept of "PRAGMA AUTONOMOUS_TRANSACTION."

Answer: "PRAGMA AUTONOMOUS_TRANSACTION" is a PL/SQL pragma that allows a procedure or function to execute as a separate transaction independent of the calling transaction. It is often used when you need to perform actions that are not dependent on the outcome of the calling transaction.

12. How do you use collections in PL/SQL?

Answer: Collections in PL/SQL are used to store multiple values in a single variable. There are three types of collections: associative arrays (also known as index-by tables), nested tables, and VARRAYs (variable-size arrays). Collections are useful for processing bulk data and performing operations on multiple values simultaneously.

13. Explain the usage of the "FORALL" statement in PL/SQL.

Answer: The "FORALL" statement in PL/SQL is used for bulk processing of data using collections. It allows you to perform a single DML (Data Manipulation Language) operation on multiple rows at once, improving the efficiency of data processing.

14. Discuss the benefits of using "BULK COLLECT" in PL/SQL.

Answer: "BULK COLLECT" is a feature in PL/SQL that allows developers to fetch multiple rows of data from a query into a collection variable in a single database call. It significantly improves the performance of data retrieval and manipulation operations, especially when dealing with large data sets.

15. How can you debug PL/SQL code effectively?

Answer: PL/SQL provides several debugging techniques, such as using the "DBMS_OUTPUT.PUT_LINE" procedure to print messages during code execution, setting breakpoints in integrated development environments (IDEs), and using tools like Oracle SQL Developer for advanced debugging and profiling.

Click here to explore further

PL/SQL Tutorial PDF
Click Here BSE Odisha 10th Result
Microsoft Office 365 Cloud
Advanced Excel Charts & GraphsHow to Create Pivot Table in Excel 

Tags:

pl/sql interview questionsoracle pl sql interview questionstricky pl/sql interview questionscognizant pl/sql interview questions for experienceddeloitte pl/sql interview questions for experiencedcollections in pl sql interview questionsadvanced pl sql interview questions for experiencedscenario based pl/sql interview questions and answersperformance tuning in pl sql interview questionswipro pl/sql interview questions for experiencedbasic pl sql interview questionspl/sql interview questions and answerspl/sql interview questions and answers for experiencedpl/sql interview questions and answers pdfpl sql interview questions accenturepl sql interview questions answersoracle sql interview questions advancedpl sql triggers interview questions answerspl sql interview questions siva academyoracle sql interview problems and solutionspl sql interview questions and answers for beginnersadvanced pl sql interview questionsaccenture pl sql interview questionsadvanced oracle pl sql interview questionsadvanced pl sql interview questions and answersamazon pl sql interview questionsamdocs pl sql interview questionsadp pl sql interview questionspl sql interview questions basicpl sql interview questions blogspotpl/sql interview questions scenario basedoracle sql interview questions scenario basedoracle sql interview questions for beginnersbest pl/sql interview questionsbank of america pl sql interview questionsbarclays pl sql interview questionsbnp paribas pl sql interview questionsbulk collect in pl sql interview questionsoracle pl/sql scenario based interview questions for experiencedpl sql interview questions for banking domainpl sql interview questions for business analystpl sql interview questions capgeminipl sql interview questions cognizantpl sql interview questions collectionspl sql interview questions multiple choicepl/sql interview questions in oracle companypl sql interview questions on bulk collectpl sql coding interview questionscomplex pl sql interview questionscapgemini pl sql interview questionscognizant pl sql interview questionscitibank pl/sql interview questionscursor in pl sql interview questionscommon pl sql interview questionscgi pl sql interview questionsclover infotech pl sql interview questionspl sql interview questions and answerspl sql interview questions and answers for experiencedoracle sql interview questions and answersoracle sql interview questions and answers for 7 years experienceoracle sql interview questions and answers for 3 years experienceoracle sql interview questions and answers for 10 years experiencepl sql tricky interview questions and answersdifficult pl sql interview questionsdeutsche bank pl sql interview questionsdatabase pl sql interview questionsdell pl sql interview questionspl sql developer interview questions for 10 years experienceoracle company interview questions for pl sql developerpl/sql interview questions pdf free downloadinfosys pl sql developer interview questionspl sql interview questions for experienced developerspl sql interview questions experiencedpl sql interview questions edurekapl/sql interview questions with examplespl/sql interview questions for experienced professionals pdforacle sql interview questions for experienced professionalsoracle sql interview questions for experiencedexception handling in pl sql interview questionsexperienced pl sql interview questionsexperienced oracle pl/sql interview questionsepsilon pl sql interview questionsey pl sql interview questionspl/sql interview questions for 10 years experiencepl/sql interview questions for 5 years experiencepl/sql interview questions for experienced professionalspl/sql interview questions for fresherspl/sql interview questions for banking domainsample pl sql interview questionswhat is pl sql interview questionsfidelity pl sql interview questionsfrequently asked pl sql interview questionsfidelity investments pl sql interview questionsfiserv pl sql interview questionsfrequently asked oracle pl/sql interview questionspl/sql scenario based interview questions for experiencedpl sql interview questions for 10 years experiencepl sql interview questions for experiencedpl/sql interview questions guru99pl sql geek interview questionsguru99 pl sql interview questionsgenpact pl sql interview questionspl/sql interview questions geeksforgeekspl sql interview questions githubgeek interview questions on oracle pl/sqlust global pl sql interview questionshsbc pl sql interview questionspl sql hard interview questionshcl pl sql interview questionspl sql exception handling interview questionspl sql high level interview questionsinterview questions for pl sql in oraclehcl interview questions for oracle pl sqlwhat are the interview questions for sqltop 20 pl sql interview questionspl sql interview questionspl sql interview questions for 7 years experiencepl sql interview questions infosysinfosys pl sql interview questions for experiencedibm pl sql interview questionsiqvia pl sql interview questionsimportant pl sql interview questionsinformatica pl sql interview questionsimportant pl sql interview questions and answersinterview questions on advanced pl sql in oraclescenario based interview questions in pl/sqlpl sql interview questions in oracleoracle sql interview questions for java developersoracle sql interview questions on joinspl sql job interview questionsjp morgan pl sql interview questionsjava pl sql interview questionspl sql interview questions javatpointpl sql joins interview questionspl sql interview questions for experienced java developersjob interview questions and answers pl sqlpl/sql interview questions khan academypl/sql interview questions kotlinpl/sql interview questions kubernetespl/sql interview questions kudvenkatpl sql interview questions kudvenkat blogpl sql interview questions koirala pdfpl sql interview questions kulkarni pdfpl sql interview questions koiralapl sql interview questions kpmgpl sql interview questions key and foreign keypl sql logical interview questionspl sql lead interview questionspl sql latest interview questions and answerslatest pl/sql interview questionspl sql l2 interview questionsl&t infotech pl sql interview questionslatest oracle pl/sql interview questions and answerslatest pl sql interview questions and answerspl sql interview questions mcqpl sql interview questions for tech mahindramindtree pl sql interview questionsmost frequently asked pl/sql interview questionsmphasis pl sql interview questionsmysql pl sql interview questionsmost common pl/sql interview questionsmajesco pl sql interview questionspl/sql mcq interview questionsmetricstream interview questions for pl/sqltech mahindra pl sql interview questionspl sql interview questions on collectionspl sql interview questions on triggerspl sql interview questions on indexespl sql interview questions on packagespl sql interview questions on functionspl/sql interview questions on joinsnetcracker pl sql interview questionsntt data pl sql interview questionspl sql interview questions online testpl sql interview questions on partitioningpl sql interview questions on proceduresoracle pl/sql interview questions and answers for 10 years experienceoracle pl sql interview questions for 3 years experienceoracle advanced pl sql interview questionsoracle pl sql interview questions in accentureoracle company pl sql interview questionsoracle pl sql interview questions on collectionsoracle pl sql interview questions performance tuningoracle apps technical pl sql interview questionspl/sql interview questions pdfpl sql interview questions performance tuningoracle sql interview questions pdforacle sql interview questions pdf downloadpl sql interview questions for production supportprocedure in pl sql interview questionspwc pl sql interview questionspackages in pl sql interview questionsproduction support pl sql interview questionspl sql interview questions pdfpl sql programming interview questions and answerspl/sql scenario based interview questions for experienced pdfpl sql interview query questionsoracle sql interview query questionsinterview questions on pl/sqlqualtech pl sql interview questionspl sql query interview questionspl sql complex queries interview questionsoracle pl/sql query interview questionspl sql query interview questions and answers pdfpl sql interview questions quoraquestions for pl sql interviewpl sql real time interview questionsreal time pl sql interview questionsreal time interview questions on oracle pl/sqlpl sql collections and records interview questionspl sql related interview questionspl sql real time interview questions and answerspl sql forms and reports interview questionsoracle sql interview scenario questionsoracle sql interview questions for production supportsql pl sql interview questionsscenario based pl sql interview questionssql pl sql interview questions for 3 years experiencescenario based oracle pl/sql interview questionssiva academy pl sql interview questionssynechron pl sql interview questionsstate street pl sql interview questionspl/sql stored procedure interview questions and answerssenior oracle pl sql developer interview questionspl/sql interview questions tcspl/sql interview questions tutorialspointpl sql interview questions topic wiseoracle sql interview questions topic wisepl sql interview questions for testersoracle sql interview questions for testerstough pl sql interview questionstcs pl sql interview questionstop 50 pl sql interview questionstriggers in pl sql interview questionstop 10 pl sql interview questionstop 50 oracle pl/sql interview questionstsys pl sql interview questionsunix pl sql interview questionsvirtusa pl sql interview questionspl/sql interview questions with answerspl sql interview questions wisdomjobsoracle sql interview questions with answersoracle sql interview questions with examplespl sql interview questions for wells fargooracle sql interview queries questions with answerswells fargo pl sql interview questionsinterview questions for pl sql developer with answerspl sql interview questions w3schoolspl sql written interview questionspl/sql interview questions xpathpl/sql interview questions xgboostpl/sql interview questions xamarin formspl sql interview questions xoriantpl sql interview questions xstorepl sql interview questions xmlpl sql interview questions xml publisherpl sql interview questions xstore pospl sql interview questions xml reportspl/sql interview questions youtubepl sql interview questions 3 years experienceoracle sql interview questions for 5 years experienceoracle sql interview questions for 4 years experiencepl sql interview questions for 5 years experiencepl sql interview questions for 8 years experiencedpl/sql interview questions zoompl/sql interview questions zscalerpl/sql interview questions z/ospl/sql interview questions zoominfopl sql interview questions zs associatespl sql interview questions zyngapl sql interview questions zalandopl sql interview questions zfspl/sql interview questions 0-60pl/sql interview questions 0-100

Featured Universities

Mahatma Gandhi University

Location: Soreng ,Sikkim , India
Approved: UGC
Course Offered: UG and PG

MATS University

Location: Raipur, Chhattisgarh, India
Approved: UGC
Course Offered: UG and PG

Kalinga University

Location: Raipur, Chhattisgarh,India
Approved: UGC
Course Offered: UG and PG

Vinayaka Missions Sikkim University

Location: Gangtok, Sikkim, India
Approved: UGC
Course Offered: UG and PG

Sabarmati University

Location: Ahmedabad, Gujarat, India
Approved: UGC
Course Offered: UG and PG

Arni University

Location: Tanda, Himachal Pradesh, India.
Approved: UGC
Course Offered: UG and PG

Capital University

Location: Jhumri Telaiya Jharkhand,India
Approved: UGC
Course Offered: UG and PG

Glocal University

Location: Saharanpur, UP, India.
Approved: UGC
Course Offered: UG and PG

Himalayan Garhwal University

Location: PG, Uttarakhand, India
Approved: UGC
Course Offered: UG and PG

Sikkim Professional University

Location: Sikkim, India
Approved: UGC
Course Offered: UG and PG

North East Frontier Technical University

Location: Aalo, AP ,India
Approved: UGC
Course Offered: UG and PG