CSS - PMS - CCE - PCS - Basic Computing Practice

CSS - PMS - CCE - PCS - Basic Computing MCQs

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CSS - PMS - CCE - PCS - Basic Computing

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CSS - PMS - CCE - PCS - Basic Computing Database Basics
A decomposition that allows the original table to be reconstructed without losing information is:
A. Lossless decomposition
B. Destructive deletion
C. Data encryption
D. Circular backup
Read Theory
Correct Answer: A
Lossless decomposition divides a table while preserving all information and valid relationships.
CSS - PMS - CCE - PCS - Basic Computing Database Basics
What does SQL stand for?
A. Structured Query Language
B. Simple Question Logic
C. System Quality Link
D. Sequential Queue Language
Read Theory
Correct Answer: A
SQL stands for Structured Query Language and is used to work with relational databases.
CSS - PMS - CCE - PCS - Basic Computing Database Basics
Which SQL command retrieves data from a table?
A. SELECT
B. INSERT
C. DELETE
D. DROP
Read Theory
Correct Answer: A
SELECT is used to retrieve rows and columns from one or more tables.
CSS - PMS - CCE - PCS - Basic Computing Database Basics
Which SQL command adds a new record to a table?
A. INSERT
B. UPDATE
C. ALTER
D. GRANT
Read Theory
Correct Answer: A
INSERT adds new rows to a table.
CSS - PMS - CCE - PCS - Basic Computing Database Basics
Which SQL command changes existing records?
A. UPDATE
B. SELECT
C. CREATE
D. COMMIT
Read Theory
Correct Answer: A
UPDATE changes values in existing rows, usually based on a WHERE condition.
CSS - PMS - CCE - PCS - Basic Computing Database Basics
Which SQL command removes selected rows from a table?
A. DELETE
B. CREATE
C. SELECT
D. GRANT
Read Theory
Correct Answer: A
DELETE removes rows and can use a WHERE clause to choose which rows are removed.
CSS - PMS - CCE - PCS - Basic Computing Database Basics
Which SQL command creates a new table?
A. CREATE TABLE
B. SELECT TABLE
C. UPDATE TABLE
D. COMMIT TABLE
Read Theory
Correct Answer: A
CREATE TABLE defines a new table, its columns, data types, and constraints.
CSS - PMS - CCE - PCS - Basic Computing Database Basics
Which SQL command changes the structure of an existing table?
A. ALTER TABLE
B. SELECT TABLE
C. INSERT TABLE
D. SAVE TABLE
Read Theory
Correct Answer: A
ALTER TABLE changes table structure, such as adding, removing, or modifying columns.
CSS - PMS - CCE - PCS - Basic Computing Database Basics
Which SQL command removes a table definition and its data?
A. DROP TABLE
B. DELETE ROW
C. SELECT TABLE
D. ORDER TABLE
Read Theory
Correct Answer: A
DROP TABLE removes the table object, including its structure and stored rows.
CSS - PMS - CCE - PCS - Basic Computing Database Basics
Which SQL command quickly removes all rows while keeping the table structure?
A. TRUNCATE TABLE
B. DROP TABLE
C. CREATE TABLE
D. ALTER TABLE
Read Theory
Correct Answer: A
TRUNCATE TABLE removes all rows but keeps the table structure for future use.
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