DBMS MCQ Multiple Choice Questions Answers - Page 3 for Practice

61. In an E-R diagram an entity set is represent by a

62. A file manipulation command that extracts some of the records from a file is called

63. A data manipulation command the combines the records from one or more tables is called

64. Which of the following is a legal expression in SQL?

65. AS clause is used in SQL for

66. The users who use easy-to-use menu are called

67. It is better to use files than a DBMS when there are

68. An entity set that does not have sufficient attributes to form a primary key is a

69. A DBMS query language is designed to

70. The DBMS language component which can be embedded in a program is

71. Which one of the following statements is false?

72. A subschema expresses

73. A data dictionary is a special file that contains:

74. NULL is

75. Hierarchical model is also called

76. The RDBMS terminology for a row is

77. In a relational model, relations are termed as

78. Architecture of the database can be viewed as

79. What is a relationship called when it is maintained between two entities?

80. Cross Product is a:

81. Which of the following operations need the participating relations to be unon compatible?

82. To delete a particular column in a relation the command used is:

83. A report generator is used to

84. The database environment has all of the following components except:

85. Count function in SQL returns the number of

86. It is possible to define a schema completely using

87. _________ is a virtual table that draws its data from the result of an SQLSELECT statement.

88. Which one of the following is not true for a view:


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