DB2 Programming MCQ Questions Answers

1. Is DECLARE TABLE in DCLGEN necessary?

2. What is the purpose of the WHENEVER statement?

3. Consider the employee table with column MGR nullable. How can you get a list of employees who are not assigned to any mgr?

4. What are the advantages of using a PACKAGE?

5. What does DBRM Stand for?

6. What is returned by the VALUE function?

7. When would you choose to run RUNSTATS?

8. What is a subselect?

9. What are the disadvantages of PAGE level lock?

10. When you COMMIT, is the cursor closed?

11. What are the various locks available?

12. What should be done before you do EXPLAIN?

13. If the null indicator has -1, what does it mean?

14. Which technique is used to retrieve data from more than one table in a single SQL statement?

15. How do you concatenate the FIRSTNAME and LASTNAME from EMPLOYEE table to give a complete name?

16. How would you retrieve the first 5 characters of FIRSTNAME column of DB2 table EMP?

17. When do you specify the isolation level?

18. How do you leave the cursor open after issuing a COMMIT?

19. Can you have more than one cursor open at any one time in a program? 

20. Suppose there is a cobol-db2 program. If you have  made changes only in the cobol program, is there a need to recomile the DBRM?

21. What is the meaning of underscore ( '_' ) in the LIKE statement?

22. What are correlated subqueries?

23. What is the use of FREE command?

24. How would you find out the total number of rows in a DB2 table?

25. When you open a cursor, DB2 will always get all rows that meet the selection criteria and create a result set.

26. Why is SELECT * not preferred in embedded SQL programs?

27. What is the restriction on using UNION in embedded SQL?

28. What is the difference between QMF & SPUFI?

29. What is a thread?

30. When will you use curser with hold option?

31. What is the statistics collected during RUNSTATS?

32. Under which circumstance would you create an index on a table?

33. How can you quickly find out the number of rows updated after an update statement?

34. What are the disadvantages of using VARCHAR?

35. How would you display the table definitions (columns, data types of columns, constraints or default values set etc) of a table in QMF?

36. Can GROUP BY and ORDER BY used in a single query?

37. What happens when you say OPEN CURSOR?

38. What are the various locking levels available?

39. How does DB2 determine which lock-size to use?

40. Can you use MAX on a CHAR column?

41. When can you not drop a database

42. In what form is data physically stored in DB2

43. Besides on TABLE and TABLESPACE level, on what level can implicit locks be placed by DB2?

44. Consider the following embedded SQL statement: SELECT CLASSNAME INTO :CLASSNAME:IND FROM CLASS WHERE STUDNAME = :STUDNAME In which order should the following program variables be evaluated by the part of the program just after this SQL statement?

45. Any database needs to go through a normalization process to make sure that data is represented only once. This will eliminate problems with creating or destroying data in the database. The normalization process is done usually in three steps which results in first, second and third normal forms. Which best describes the process to obtain the third normal form?

46. Which of the following is not a type of dynamic SQL?

47. When using JBDC, do you have to recode your Java application if you want to change between drivers?

48. Which represents a function that is performed for each row in a DB2 table

49. Which is an example of a column that would contain statistics necessary for programming?

50. Why must the DB2 precompiler be used to execute SQL statements?

51. What four languages can host variable arrays be specified in?

52. Can the SQL procedural language be used for advanced functions?

53. What is the Java data access platform used in DB2?

54. What happens when the execution of a utility is terminated by the TERM command?

55. Which of the following is not a DB2 object

56. In what catalog table must stored procedures be defined?

57. Which is a correct syntactical example of written SQL code?

58. What is an example of an underlying cause for regressions caused by changes in DB2?

59. When should we execute a REBIND rather than a BIND

60. SQLSTATE is a standard set of error messages and warnings in which the first two characters defines the class and the last three defines the subclass of the error. Which of the following SQLSTATE codes is interpreted as 'No data returned'?

61. Given the following DDL statements: CREATE TABLE Smart1 (a INT, b INT, c INT) CREATE VIEW View1 AS SELECT a,b,c FROM Smart1 WHERE a > 250 WITH CHECK OPTION Which of the following INSERT is correct

62. Which of the following is correct SQLJ syntax?

63. What happens to SQL statements if there are no stored procedures?

64. What are the maximum number of tables that can be joined in DB2

65. What code is used to start the CICS attachment facility?

66. What must happen before using the EXPLAIN statement?

67. Which of the following is a DB2 mechanism that ensures data integrity between tables related by Primary & Foreign Keys

68. When are dynamic SQL applications prepared?

69. What would the “SQL CONNECT” statement be used for when coding stored procedures?

70. Given the following DDL statement: CREATE TABLE newsmart1 LIKE smart1 Which of the following would occur as a result of the statement execution?

71. Which is an example of a programming method not used in DB2 programming?

72. Which occurs if a DB2 procedure or application ends abnormally during an active unit of work?

73. What type of SQL operator would you use to combine the results of 2 Select statements while retaining the duplicates

74. A declared temporary table is used for which of the following purposes?

75. A role is a database entity that groups together one or more privileges. Which of the following is true for a 'role'

76. Which eliminates all but one of each set of repeated rows in the final result table?

77. What is a stored procedure?

78. Which object allows multiple users to access data in a table with each only being able to access certain subsets of the data?

79. What is a host structure?

80. What is SQLCA used for?

81. What are three examples of languages you can use to program in DB2?

82. Correct syntax for an input variable of a PARMLIST string?

83. What technique can DB2 use to more effectively interpret data from EXPLAIN tables?

84. What are the three primary development environments for DB2?

85. Which is not one of the types of authorizations associated with a DB2 user?

86. How does one prepare a Java program that contains JDBC methods?

87. What must a SELECT statement be coded within?

88. What's the output of a DB2 Bind

89. How many indexes will be created by the following statement? Create table Smarterer { Col1 int not null primary key, Col2 char (64), Col3 char (32), Col4 int not null, Constraint c4 unique (Col4,Col1) }

90. What are two examples of steps that must be taken before coding an application with embedded static or dynamic SQL statements?

91. Before executing SQL statements, you want to know whether the CICS attachment facility is available. How do you check?

92. Why would you receive a command response of NORMAL when the attachment facility is not available?

93. Which statement about an index is NOT true?

94. What is a lightweight web application created from multiple sources?

95. Which of the following can be accomplished with a single UPDATE statement?

96. When coding in a language that requires a host variable declaration, what must precede it?

97. What is the name of the effect when a system continues to receive work, but is down?

98. Consider the following: DECLARE MYCURS CURSOR FOR SELECT * FROM MYTABLE WHERE COL1 > :NUM Which of the following embedded SQL statements will NOT generate an error?

99. What is a benefit of concurrency in SQL application programming?

100. What is an example of a benefit of using the Java programming language?