537 questions and answers
Write the difference between procedural and non-procedural query language.
A query language is a language in which a user requests information from the database.
Write the rules of DBA.
Database administration (DBA) is an operational or technical level function responsible for physical database design, security enforcement, and database performance.
Show that no left recursive grammar can be LL(1). Show that no LL(1) grammar can be ambiguous.
First of all FIRST and FOLLOW over the grammar must find out in which left recursion has been removed.
What do you understand by L-attributed definition? Give example. Describe with diagram the working process of Lexical Analyzer. Describe LR parsing with block diagram.
L-attributes: All variables have an attribute associated with it, getting some values.
Write short notes on:
Lex is a program generator designed for lexical processing of character input streams. It accepts a high-level, problem oriented specification for character string matching, and produces a program in a general purpose language which recognizes regular expressions.
Write short notes on:
In compiler optimization theory, the compiler optimization basically refers to the program optimization to achieve performance in the execution.
What is activation record? Explain clearly the components of an activation record.
A data structure containing the important state information for a particular instance of a function call (or something that resembles a function call). May exist entirely in memory, or be partially stored in registers.
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