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MCQs

Total Questions : 10
Question 1. Which clause is used to "Filters out unwanted data?
  1.    FROM
  2.    WHERE
  3.    SELECT
  4.    ORDER BY
 Discuss Question
Answer: Option B. -> WHERE




Question 2. Which clause is used to "filter out unwanted Groups?
  1.    HAVING
  2.    FROM
  3.    WHERE
  4.    SELECT
 Discuss Question
Answer: Option A. -> HAVING




Question 3. Which clause is used to "Modify the existing field of the table?
  1.    ALTER
  2.    FROM
  3.    SELECT
  4.    MODIFY
 Discuss Question
Answer: Option A. -> ALTER




Question 4. Which are the two languages used in Mysql?
  1.    DML/DDL
  2.    DDL/DCL
  3.    DML/DDM
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> DML/DDL




Question 5. "MODIFY is used with which "Query clause?
  1.    ALTER
  2.    FROM
  3.    WHERE
  4.    ORDER BY
 Discuss Question
Answer: Option A. -> ALTER




Question 6. What jobs "Query Optimizer perform in Mysql?
  1.    Determine the efficient way to execute a query
  2.    Syntax errors
  3.    Permissions
  4.    All of the mentioned
 Discuss Question
Answer: Option A. -> Determine the efficient way to execute a query


Query optimizer is used to find the efficient way to execute a query in Mysql.


Question 7. Which Key is used to link two tables in Mysql?
  1.    Primary Key
  2.    Foreign Key
  3.    Both a and b
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Foreign Key


Foreign Key is only the Key which can link two tables.


Question 8. Which of the following are the valid "database datatypes in Mysql?
  1.    Numerical
  2.    Temporal
  3.    Text
  4.    All of the mentioned
 Discuss Question
Answer: Option D. -> All of the mentioned




Question 9. Which among the following tags belong to Data Manipulation language?
  1.    UPDATE
  2.    ALTER
  3.    MODIFY
  4.    All of the mentioned
 Discuss Question
Answer: Option D. -> All of the mentioned


Data Manipulation language contains all tags which are used for manipulating the existing structure in Mysql.


Question 10. Is duplicate entry of primary key is allowed in SQL?
  1.    Yes
  2.    No
  3.    Depends
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> No


Primary key are used to uniquely define attributed stored in the table.


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