What is logical error example?

A logical error in a program is an error were the instructions given in the program do not accomplish the intended goal. “Get me a cup of coffee.” is a logical error when the person intended to ask for a cup of tea. In computer programs, this error can occur in many different forms. What is logical error explain? In …

Read more

What is Type 2 error in statistics?

What Is a Type II ErrorType II ErrorA false negative error, or false negative, is a test result which wrongly indicates that a condition does not hold. For example, when a pregnancy test indicates a woman is not pregnant, but she is, or when a person guilty of a crime is acquitted, these are false negatives.https://en.wikipedia.org › False_positives_and_false_negativesFalse positives and …

Read more

Can we rollback TRUNCATE?

You cannot ROLLBACK TRUNCATE Simply, you cannot rollback a transaction if it is already committed but you can do something else to get the data back (or at least some parts of it). When you execute the TRUNCATE statement, your data is still in the MDF file. Can we rollback truncate and DELETE? The operation cannot be rolled back. DROP …

Read more

Can a primary key be left empty?

Answer: No. We can’t have a Primary Key column with a NULL value. The reason for the same is very simple, primary key purpose is to uniquely identify records. If two records of a single column have a NULL value, the column values are not considered equal. Can a primary key be set to NULL? Primary key constraints NULL values …

Read more

Which is faster primary key or unique key?

A primary key ensures unique row identification. This results in faster sorting, searching, and querying operations. A foreign key creates a link between two tables. It maintains referential integrity between the referencing column(s) and the referenced column(s). Does primary key make query faster? Having a primary key per se will not speed up queries. Primary key constraints are usually accompanied …

Read more

Is super key and unique key same?

Super Key is an attribute (or set of attributes) that is used to uniquely identifies all attributes in a relation. Primary Key is a minimal set of attribute (or set of attributes) that is used to uniquely identifies all attributes in a relation. 2. All super keys can’t be primary keys. What is the another name of super key? Super …

Read more

Does a compiler check for syntax error?

Syntax errors: Errors that occur when you violate the rules of writing C/C++ syntax are known as syntax errors. This compiler error indicates something that must be fixed before the code can be compiled. All these errors are detected by compiler and thus are known as compile-time errors. Does a compiler detect syntax errors? All syntax errors and some of …

Read more

What is a handler in code?

In programming, an event handler is a callback routine that operates asynchronously once an event takes place. It dictates the action that follows the event. The programmer writes a code for this action to take place. An event is an action that takes place when a user interacts with a program. What is the term handler mean? ˈhan-dᵊl-ər. : one …

Read more

What are unsafe ports?

A port or berth will be unsafe if the ship is unable to reach the port safely. For example a port may be considered unsafe even if the ship suffers damage during its passage on a river or channel when approaching a port. What is an unsafe port? A port or berth will be unsafe if the ship is unable …

Read more

What is the basic syntax of SQL?

All the SQL statements start with any of the keywords like SELECT, INSERT, UPDATE, DELETE, ALTER, DROP, CREATE, USE, SHOW and all the statements end with a semicolon (;). The most important point to be noted here is that SQL is case insensitive, which means SELECT and select have same meaning in SQL statements. How many syntax are there in …

Read more