10+ Assistant System Analyst Interview Questions and Answers

Questions related to SQL concepts and syntax for Assistant System Analyst position.

• SQL joins - types and syntax

• Difference between joins

• View - definition and syntax

• Cursor - definition

• Trigger - definition and types

• Example of using joins

• Index - definition, creation and syntax

• Difference between drop, truncate and delete

• Function - definition and creation

A primary key uniquely identifies a record in a table, while a foreign key links records between tables.

• A primary key must contain unique values and cannot be NULL.

• Example: In a 'Users' table, 'UserID' can be a primary key.

• A foreign key is a field in one table that links to the primary key of another table.

• Example: In an 'Orders' table, 'UserID' can be a foreign key referencing 'Users'.

• Primary keys ensure entity integrity, while foreign keys ensure referential integrity.

The question asks about the differences between delete, truncate, and drop in SQL, as well as the syntax of DML, DCL, and TCL statements.

• DELETE is a DML statement used to remove specific rows from a table.

• TRUNCATE is a DDL statement used to remove all rows from a table.

• DROP is a DDL statement used to remove an entire table from the database.

• DML (Data Manipulation Language) statements are used to manipulate data in the database, such as INSERT, UPDATE, and DELETE.

• DCL (Data Con...read more

To form a query in SQL, use the SELECT statement followed by the columns to retrieve and the table to retrieve from.

• Use the SELECT statement to specify the columns to retrieve

• Use the FROM keyword to specify the table to retrieve from

• Use the WHERE keyword to specify any conditions for the query

• Use the ORDER BY keyword to specify the order of the results

• Use the GROUP BY keyword to group the results by a specific column

• Use the JOIN keyword to combine data from multiple tables

• Exa...read more

ML and IoT are different technologies. ML focuses on data analysis and prediction, while IoT focuses on connecting devices and collecting data.

• ML stands for Machine Learning, which is a subset of Artificial Intelligence that focuses on algorithms and models to analyze and interpret data.

• ML is used to train models and make predictions or decisions based on patterns and trends in data.

• Examples of ML applications include recommendation systems, fraud detection, and image recogni...read more

SDLC cycle is a process followed by software development teams to design, develop and test high-quality software.

• SDLC stands for Software Development Life Cycle

• It consists of several phases including planning, analysis, design, implementation, testing, and maintenance

• Each phase has its own set of deliverables and goals

• The cycle is iterative, meaning that each phase may be revisited multiple times

• The goal is to produce high-quality software that meets the needs of the end-user...read more

Joins in SQL combine rows from two or more tables based on related columns.

• INNER JOIN: Returns records with matching values in both tables. Example: SELECT * FROM A INNER JOIN B ON A.id = B.id;

• LEFT JOIN: Returns all records from the left table and matched records from the right table. Example: SELECT * FROM A LEFT JOIN B ON A.id = B.id;

• RIGHT JOIN: Returns all records from the right table and matched records from the left table. Example: SELECT * FROM A RIGHT JOIN B ON A.id = ...read more

Curd rules are constraints that ensure data integrity in a database.

• Curd rules are used to enforce data consistency and accuracy.

• They prevent invalid data from being entered into the database.

• Examples of curd rules include unique constraints, foreign key constraints, and check constraints.

JDK is a development kit, JRE is a runtime environment, and JVM is a virtual machine that executes Java bytecode.

• JDK (Java Development Kit) contains tools for developing and debugging Java programs.

• JRE (Java Runtime Environment) provides the libraries and components required to run Java applications.

• JVM (Java Virtual Machine) is an abstract machine that executes Java bytecode.

• JDK includes JRE, and JRE includes JVM.

• Example: JDK is used by developers to write and compile Java c...read more