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হোম›একাদশ-দ্বাদশ শ্রেণি›English Version›Information and Communication Technology›C-06 — Database Management System›C-06-Q026

C-06-Q026mediumsingle_mcq

A user does not want to disclose their monthly family income. According to the chapter, what should be stored instead?

a0
bAn empty string
cA null value (kept blank)
dA negative number

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Jপরবর্তী

এই অধ্যায়ের আরও প্রশ্ন

C-06-Q027If a record field is kept blank, how does the database treat it?
C-06-Q028What is a primary key?
C-06-Q029When multiple columns are combined to create a primary key, it is called a —
C-06-Q030Why can a student's name NOT serve as a primary key?
C-06-Q031Which attribute makes an 'id' column automatically increase its value by 1 each time a new row is added?
C-06-Q032Consider the following statements about the student table: Which of the following is correct?
C-06-Q033Why is an 'id' column with auto increment commonly added when no suitable primary key exists?
C-06-Q034According to the chapter, what is true about a primary key in a relational database?
C-06-Q035Why can using class + section + roll number as a composite key cause a problem when keeping records of passed-
C-06-Q036Every adult in Bangladesh has a unique National Identification (NID) number. Why can the NID be used as a prim

C-06 — Database Management System — সব প্রশ্ন দেখুন (143টি) →