Questions Related to technology

Multiple choice technology databases
  1. Restricts the length of the String

  2. Replaces a sequence of characters in a string with another set of characters

  3. Modifies the datatype of a column

  4. Renames a column

Reveal answer Fill a bubble to check yourself
B Correct answer
Multiple choice technology databases
  1. IN executes the inner query for each row affected by the outer query and EXISTS executes the inner query only once irrespective of the outer query

  2. IN executes the inner query only once irrespective of the outer query and EXISTS executes the inner query only once irrespective of the outer query

  3. IN executes the inner query only once irrespective of the outer query and EXISTS executes the outer query for each row affected by the outer query

  4. IN executes the inner query for each row affected by the outer query and EXISTS executes the outer query for each row affected by the outer query

Reveal answer Fill a bubble to check yourself
C Correct answer