SNHU DAD 220 COMPREHENSIVE STUDY
GUIDE 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
• What does the INSERT statement do?.
Answer: The INSERT statement adds rows to a table. the statement is used
with the INTO and VALUES clauses in the form of INSERT INTO
table_name (column1, column2, ...... VALUES (values, separated, by,
commas), (If, several, rows, then), (groups, of, parenthesis, separated), (in,
this, manner, !);
• determine maximum for the relationship: city-iscapitalof-state.
Answer: one-one
• implementing many-one relationships.
Answer: become a foreign key in the table on the 'many' side of the
relationship, referring to the primary key on the 'one' side. The foreign key
name is the primary key name with an optional prefix. The prefix is derived
from the relationship name and clarifies the meaning of the foreign key.
• DROP statement does what.
Answer: deletes a database or table (DDL)
• partition.
Answer: a group of mutually exclusive subtype entities. Subtype entities in a
partition cannot share common instances
• What is speech enhancement.
Answer: Strategy where gain is increased in channels where speech is the
main input (2000-6000 Hz) if noise is detected in low frequencies
• How long before a HA decides to engage NR system.
Answer: It varies! HAs may gather data for 10-15 seconds before deciding
to activate NR or not
, • What does the statement AUTO_INCREMENT do?.
Answer: The AUTO_INCREMENT statement specifies that the column will
have incrementing values automatically added to it. (DDL)
• How does a HA identify a stimulus as being speech.
Answer: Patterning
• ALTER statement does what.
Answer: adds, modifies, or deletes table columns (DDL)
• CASCADE.
Answer: propagates primary key changes to foreign keys. If a primary key is
deleted, rows containing matching foreign keys are deleted. If a primary key
is updated, matching foreign keys are updated to the same value.
• Why might digital noise reduction be a difficult task, at the level of the
input.
Answer: There's always an overlap between noise and speech frequencies +
amplitudes, so cutting noise may lead to loss of some speech cues
• Attribute minimum.
Answer: least number of attribute instances possible for a single entity
instance. Attribute minimum is specified as zero or one
• Supertype Entity.
Answer: the entity that has subtype entities
• (DML).
Answer: Data Manipulation Language
• determine maximum for the relationship: Person-Has-Passport.
Answer: one-many a person can have many passports but a passport can
only be for one person
• Purpose of DNR vs. DM.
Answer: DNR = improves comfort in noise DM = improves speech
perception in noise
GUIDE 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
• What does the INSERT statement do?.
Answer: The INSERT statement adds rows to a table. the statement is used
with the INTO and VALUES clauses in the form of INSERT INTO
table_name (column1, column2, ...... VALUES (values, separated, by,
commas), (If, several, rows, then), (groups, of, parenthesis, separated), (in,
this, manner, !);
• determine maximum for the relationship: city-iscapitalof-state.
Answer: one-one
• implementing many-one relationships.
Answer: become a foreign key in the table on the 'many' side of the
relationship, referring to the primary key on the 'one' side. The foreign key
name is the primary key name with an optional prefix. The prefix is derived
from the relationship name and clarifies the meaning of the foreign key.
• DROP statement does what.
Answer: deletes a database or table (DDL)
• partition.
Answer: a group of mutually exclusive subtype entities. Subtype entities in a
partition cannot share common instances
• What is speech enhancement.
Answer: Strategy where gain is increased in channels where speech is the
main input (2000-6000 Hz) if noise is detected in low frequencies
• How long before a HA decides to engage NR system.
Answer: It varies! HAs may gather data for 10-15 seconds before deciding
to activate NR or not
, • What does the statement AUTO_INCREMENT do?.
Answer: The AUTO_INCREMENT statement specifies that the column will
have incrementing values automatically added to it. (DDL)
• How does a HA identify a stimulus as being speech.
Answer: Patterning
• ALTER statement does what.
Answer: adds, modifies, or deletes table columns (DDL)
• CASCADE.
Answer: propagates primary key changes to foreign keys. If a primary key is
deleted, rows containing matching foreign keys are deleted. If a primary key
is updated, matching foreign keys are updated to the same value.
• Why might digital noise reduction be a difficult task, at the level of the
input.
Answer: There's always an overlap between noise and speech frequencies +
amplitudes, so cutting noise may lead to loss of some speech cues
• Attribute minimum.
Answer: least number of attribute instances possible for a single entity
instance. Attribute minimum is specified as zero or one
• Supertype Entity.
Answer: the entity that has subtype entities
• (DML).
Answer: Data Manipulation Language
• determine maximum for the relationship: Person-Has-Passport.
Answer: one-many a person can have many passports but a passport can
only be for one person
• Purpose of DNR vs. DM.
Answer: DNR = improves comfort in noise DM = improves speech
perception in noise
