Which command returns the product of two columns returned in a column named ProdC1C2?
A. SELECT Col1 * Col2 AS ProdC1C2
B. SELECT AS ProdC1C2 Col1 x Col2
C. SELECT FROM Col1 * Col2 TOTAL ProdC1C2
D. SELECT (Col1, Col2) PRODUCT ProdC1C2
Answer: A
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Which of the following Java statements contain variables whose values are modified?
``` a) int p = i + j + k + 7; b) System.out.println("variables whose values are modified"); c) System.out.println("a = 5"); d) int value = input.nextInt(); ```
Draw a decision tree depicting the reimbursement policy below:
``` DO WHILE there are claims remaining. IF a local trip Pay 45 cents a mile THEN IF a one-day trip Pay mileage and check the times of departure and return IF leave by 7:00 A.M. and return later than 10:00 A.M. THEN receive reimbursement for breakfast IF leave by 11:00 A.M. and return later than 2:00 P.M. THEN receive reimbursement for lunch IF leave by 5:00 P.M. and have dinner by 7:00 P.M. THEN receive reimbursement for dinner ELSE We allow hotel, taxi, and airfare ENDIF ENDIF ENDIF Print summary for Trav Farr ENDDO ```
Answer the following statements true (T) or false (F)
1) DELETE is not a valid SQL keyword. 2) Tables in a database must have a primary key. 3) Python programmers communicate with databases using modules that conform to the DB-API. 4) UPDATE is a valid SQL keyword. 5) The WHERE clause condition can not contain operator <>.
Which of the following is NOT used to find logical errors?
a) breakpoints b) watches c) System.out.println statements d) exceptions